The class of true jellyfish, in the phylum CNIDARIA. They are mostly free-swimming marine organisms that go through five stages in their life cycle and exhibit two body forms: polyp and medusa.
A species of ciliated PARAMECIUM possessing two micronuclei.
A genus of ciliate protozoa that is often large enough to be seen by the naked eye. Paramecia are commonly used in genetic, cytological, and other research.
A phylum of radially symmetrical invertebrates characterized by possession of stinging cells called nematocysts. It includes the classes ANTHOZOA; CUBOZOA; HYDROZOA, and SCYPHOZOA. Members carry CNIDARIAN VENOMS.
The class of box jellyfish, in the phylum CNIDARIA, characterized by their cube shape, and considered the most venomous jellyfish.
Any significant change in measures of climate (such as temperature, precipitation, or wind) lasting for an extended period (decades or longer). It may result from natural factors such as changes in the sun's intensity, natural processes within the climate system such as changes in ocean circulation, or human activities.
A class in the phylum CNIDARIA which alternates between polyp and medusa forms during their life cycle. There are over 2700 species in five orders.
A double-walled capsule found in jellyfish and other CNIDARIA whose functions include prey capture, defense, locomotion, and attachment. Nematocysts contain toxic CNIDARIAN VENOMS which are injected into the victim via a barbed tubule.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
The order Actiniaria, in the class ANTHOZOA, comprised of large, solitary polyps. All species are carnivorous.
Species of jellyfish, in the family Pelagiidae, order Semaeostomeae, class SCYPHOZOA. Their painful sting is caused by a venom toxic to humans.
A plant species of the genus Urtica, family URTICACEAE. Roots have been used to treat PROSTATIC HYPERPLASIA. Leaves are edible after the stinging quality is eliminated by brief heating.
The sesame family of the order Lamiales that are mainly herbs and shrubs growing in warm regions.
The upper or most anterior segment of the STERNUM which articulates with the CLAVICLE and first two pairs of RIBS.
A syndrome characterized by the acute onset of unilateral FACIAL PARALYSIS which progresses over a 2-5 day period. Weakness of the orbicularis oculi muscle and resulting incomplete eye closure may be associated with corneal injury. Pain behind the ear often precedes the onset of paralysis. This condition may be associated with HERPESVIRUS 1, HUMAN infection of the facial nerve. (Adams et al., Principles of Neurology, 6th ed, p1376)
Hostile conflict between organized groups of people.
A species of VARICELLOVIRUS causing abortion and respiratory disease in horses.
United Nations' action to intervene in conflict between the nation of Kuwait and occupying Iraqi forces, occurring from 1990 through 1991.
A genus of freshwater polyps in the family Hydridae, order Hydroida, class HYDROZOA. They are of special interest because of their complex organization and because their adult organization corresponds roughly to the gastrula of higher animals.
That portion of the electromagnetic spectrum usually sensed as heat. Infrared wavelengths are longer than those of visible light, extending into the microwave frequencies. They are used therapeutically as heat, and also to warm food in restaurants.
Coloring matter from the insect Coccus cacti L. It is used in foods, pharmaceuticals, toiletries, etc., as a dye, and also has use as a microscopic stain and biological marker.
That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range.
Treatment of disease by exposure to light, especially by variously concentrated light rays or specific wavelengths.
Animals that have no spinal column.
The process of cumulative change at the level of DNA; RNA; and PROTEINS, over successive generations.
The relationships of groups of organisms as reflected by their genetic makeup.
Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.
The techniques used to produce molecules exhibiting properties that conform to the demands of the experimenter. These techniques combine methods of generating structural changes with methods of selection. They are also used to examine proposed mechanisms of evolution under in vitro selection conditions.
Animals having a vertebral column, members of the phylum Chordata, subphylum Craniata comprising mammals, birds, reptiles, amphibians, and fishes.
The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.
Venoms from jellyfish; CORALS; SEA ANEMONES; etc. They contain hemo-, cardio-, dermo- , and neuro-toxic substances and probably ENZYMES. They include palytoxin, sarcophine, and anthopleurine.
The effects, both local and systemic, caused by the bite of SCORPIONS.
Bites and stings inflicted by insects.
Precise and detailed plans for the study of a medical or biomedical problem and/or plans for a regimen of therapy.
Antisera used to counteract poisoning by animal VENOMS, especially SNAKE VENOMS.
The phenomenon by which dissociated cells intermixed in vitro tend to group themselves with cells of their own type.
A plant genus of the family POACEAE. The seed is one of the millets used in EDIBLE GRAIN. It contains vitexin. The common name of buffelgrass is also used for CENCHRUS.
A genus of pearl oysters in the family Pteriidae, class BIVALVIA. Both cultured and natural pearls are obtained from species in the genus. They are distinct from the distantly related, edible true oysters of the family OSTREIDAE.
Cellular antigens that are specific for MELANOMA cells.
Sequential operating programs and data which instruct the functioning of a digital computer.
A biomineral consisting of layers of crystalized ARAGONITE, separated by interlamellar layers of organic matrix containing beta-CHITIN, and surrounded by an intercrystalline organic membrane of silk fibroin. Nacre is the iridescent substance better known as mother-of-pearl that is secreted by MOLLUSCS.
A loose confederation of computer communication networks around the world. The networks that make up the Internet are connected through several backbone networks. The Internet grew out of the US Government ARPAnet project and was designed to facilitate information exchange.
Medical care provided after the regular practice schedule of the physicians. Usually it is designed to deliver 24-hour-a-day and 365-day-a-year patient care coverage for emergencies, triage, pediatric care, or hospice care.
A group of islands in the southwest Pacific. Its capital is Wellington. It was discovered by the Dutch explorer Abel Tasman in 1642 and circumnavigated by Cook in 1769. Colonized in 1840 by the New Zealand Company, it became a British crown colony in 1840 until 1907 when colonial status was terminated. New Zealand is a partly anglicized form of the original Dutch name Nieuw Zeeland, new sea land, possibly with reference to the Dutch province of Zeeland. (From Webster's New Geographical Dictionary, 1988, p842 & Room, Brewer's Dictionary of Names, 1992, p378)

Nuclear translocation of green fluorescent protein-nuclear factor kappaB with a distinct lag time in living cells. (1/199)

A highly fluorescent mutant form of the green fluorescent protein (GFP) has been fused to the human nuclear factor kappaB (NF-kappaB) p50 and p105 (p50/IkappaB gamma), a precursor protein of NF-kappaB p50. GFP-p50 and GFP-p105 were expressed in monkey COS-7 cells and human HeLa cells. Translocation of these chimeric proteins was observed by confocal laser scanning microscopy. GFP-p50 (without IkappaB gamma) in the transfected cells resided in the nucleus. On the other hand, GFP-p105 (GFP-p50 with IkappaB gamma) localized only in the cytoplasm before stimulation and translocated to the nucleus with stimulant specificity similar to that of native NF-kappaB/IkappaB. In addition, the translocation of NF-kappaB to the nucleus had a distinct lag time (a quiescent time) in the target cells. The lag time lasted 10-20 min after stimulation with hydrogen peroxide or tumor necrosis factor alpha. It was suggested that this might be due to the existence of a limiting step where NF-kappaB is released from NF-kappaB/IkappaB by the proteasome.  (+info)

Heterologous sequences greatly affect foreign gene expression in tobacco mosaic virus-based vectors. (2/199)

A series of tobacco mosaic virus (TMV)-based hybrid vectors for transient gene expression were constructed with similar designs but differing in the source of heterologous tobamovirus sequence: Odontoglossum ringspot virus, tobacco mild green mosaic virus variants U2 and U5, tomato mosaic virus, and sunn-hemp mosaic virus. These vectors contained a heterologous coat protein subgenomic mRNA promoter and coat protein open reading frame (ORF) and either TMV or heterologous 3' nontranslated region. The foreign ORF, from the jellyfish green fluorescent protein (GFP) gene, was transcribed from the native TMV coat protein subgenomic mRNA promoter, which extended into the coat protein ORF. The presence of an in-frame stop codon within the GFP mRNA leader and the choice of sequence of GFP ORFs substantially affected translational efficiency. However, the major regulatory component of gene expression in these vectors appeared to be transcriptional rather than translational. There was an inverse relationship between expression of GFP and the heterologous coat protein genes that was reflected in accumulation of the respective mRNAs and proteins. The most effective vector in this series (30B) contained sequences encoding the coat protein subgenomic mRNA promoter, coat protein ORF, and 3' nontranslated region from tobacco mild green mosaic virus U5. Expressed from 30B, GFP accumulated up to 10% of total soluble protein in leaves.  (+info)

Examination of Listeria monocytogenes intracellular gene expression by using the green fluorescent protein of Aequorea victoria. (3/199)

The ActA protein of Listeria monocytogenes is an essential virulence factor and is required for intracellular bacterial motility and cell-to-cell spread. plcB, cotranscribed with actA, encodes a broad-specificity phospholipase C that contributes to lysis of host cell vacuoles and cell-to-cell spread. Construction of a transcriptional fusion between actA-plcB and the green fluorescent protein gene of Aequorea victoria has facilitated the detailed examination of patterns of actA/plcB expression within infected tissue culture cells. actA/plcB expression began approximately 30 min postinfection and was dependent upon entry of L. monocytogenes into the host cytosol. L. monocytogenes Deltahly mutants, which are unable to escape from host cell vacuoles, did not express actA/plcB at detectable levels within infected tissue culture cells; however, complementation of the hly defect allowed entry of the bacteria into the host cytoplasm and subsequent actA/plcB expression. These results emphasize the ability of L. monocytogenes to sense the different host cell compartment environments encountered during the course of infection and to regulate virulence gene expression in response.  (+info)

The effects of level of expression of a jellyfish Shaker potassium channel: a positive potassium feedback mechanism. (4/199)

1. When jellyfish Shaker potassium channels (jShak2) are heterologously expressed in Xenopus oocytes at different levels they demonstrate density-dependent changes in electrical and kinetic properties of macroscopic currents. 2. The activation and inactivation properties of jShak2 channels depend on the extracellular potassium concentration. In this study we present experimental data which show that expression-dependent changes in kinetic and electrical properties of jShak2 macroscopic currents can be explained by the positive feedback effect of dynamic accumulation of K+ in the perimembranal space.  (+info)

Evaluation of transcriptional fusions with green fluorescent protein versus luciferase as reporters in bacterial mutagenicity tests. (5/199)

A bacterial plasmid was constructed on which the regulatory region of the umuC gene of Escherichia coli was fused to the coding sequence of the green fluorescent protein gene (gfp) from the jellyfish Aequorea victoria. Escherichia coli AB1157 strains carrying the plasmid emitted fluorescence in the presence of mutagens that induce the SOS DNA repair system. Data on tests with nitrosoguanidine, methylmethane sulphonate and UV radiation (254 nm) are presented. Although fluorescent detection using this system was not as rapid or sensitive as a similar luminescent equivalent (umuC-luxAB), the gfp reporter system was more robust. Escherichia coli umu gene induction was also analysed in Salmonella typhimurium TA1537 cells following plasmid transfer and exposure to the same range of mutagens. There was no significant difference in sensitivity between the two species. These preliminary results will provide the basis for development of mutagenicity test systems useful in the testing of complex mixtures, such as environmental samples, and the investigation of physiological parameters influencing spontaneous mutagenesis in bacteria.  (+info)

Reversible inactivation of cell-type-specific regulatory and structural genes in migrating isolated striated muscle cells of jellyfish. (6/199)

We have investigated, by RT-PCR and in situ hybridization, expression of genes encoding regulatory and structural proteins in migrating mononucleated striated muscle cells of the medusa Podocoryne carnea. Expression of the three homeobox genes Otx, Cnox1-Pc, and Cnox3-Pc; a specific splice variant of the myosin heavy chain gene (Myo1); and a tropomyosin (Tpm2) is stable in isolated and cultured striated muscle tissue. When grafted onto cell-free extracellular matrix (ECM), muscle cells of the tissue fragments leave their native ECM and migrate as a coherent tissue onto a host ECM until a stretched cell monolayer is formed. Shortly after the first cells of the grafted isolate have made contact with the host ECM, Otx and Cnox1-Pc expression is completely turned off in all cells of the graft, including those still adhering to their native ECM. Myo1 message disappears with a delay while the expression level of Tpm2 is strongly reduced. However, expression of the homeobox gene Cnox3-Pc, a msh-like gene, and of the ubiquitously expressed elongation factor 1 alpha is not affected by the migration process. All genes are reexpressed after 12-24 h, once migration of the cells has ceased. Our results demonstrate that the first few migrating cells induce a change in gene expression which is rapidly communicated throughout the entire tissue. Furthermore, we showed that commitment of striated muscle cells remains stable despite the transient inactivation of cell-type-specific regulatory and structural genes.  (+info)

Modulation of jellyfish potassium channels by external potassium ions. (7/199)

The amplitude of an A-like potassium current (I(Kfast)) in identified cultured motor neurons isolated from the jellyfish Polyorchis penicillatus was found to be strongly modulated by extracellular potassium ([K(+)](out)). When expressed in Xenopus oocytes, two jellyfish Shaker-like genes, jShak1 and jShak2, coding for potassium channels, exhibited similar modulation by [K(+)](out) over a range of concentrations from 0 to 100 mM. jShak2-encoded channels also showed a decreased rate of inactivation and an increased rate of recovery from inactivation at high [K(+)](out). Using site-directed mutagenesis we show that inactivation of jShak2 can be ascribed to an unusual combination of a weak "implicit" N-type inactivation mechanism and a strong, fast, potassium-sensitive C-type mechanism. Interaction between the two forms of inactivation is responsible for the potassium dependence of cumulative inactivation. Inactivation of jShak1 was determined primarily by a strong "ball and chain" mechanism similar to fruit fly Shaker channels. Experiments using fast perfusion of outside-out patches with jShak2 channels were used to establish that the effects of [K(+)](out) on the peak current amplitude and inactivation were due to processes occurring at either different sites located at the external channel mouth with different retention times for potassium ions, or at the same site(s) where retention time is determined by state-dependent conformations of the channel protein. The possible physiological implications of potassium sensitivity of high-threshold potassium A-like currents is discussed.  (+info)

Residues in a jellyfish shaker-like channel involved in modulation by external potassium. (8/199)

The jellyfish gene, jShak2, coded for a potassium channel that showed increased conductance and a decreased inactivation rate as [K(+)](out) was increased. The relative modulatory effectiveness of K(+), Rb(+), Cs(+), and Na(+) indicated that a weak-field-strength site is present. Cysteine substituted mutants (L369C and F370C) of an N-terminal truncated construct, (jShak2Delta2-38) which only showed C-type inactivation, were used to establish the position and nature of this site(s). In comparison with jShak2Delta2-38 and F370C, L369C showed a greater relative increase in peak current when [K(+)](out) was increased from 1 to 100 mM because the affinity of this site was reduced at low [K(+)](out). Increasing [K(+)](out) had little effect on the rate of inactivation of L369C; however, the appearance of a second, hyperbolic component to the inactivation curve for F370C indicated that this mutation had increased the affinity of the low-affinity site by bringing the backbone oxygens closer together. Methanethiosulphonate reagents were used to form positively (MTSET), negatively (MTSES), and neutrally (MTSM) charged side groups on the cysteine-substituted residues at the purported K(+) binding site(s) in the channel mouth and conductance and inactivation kinetic measurements made. The reduced affinity of the site produced by the mutation L369C was probably due to the increased hydrophobicity of cysteine, which changed the relative positions of carbonyl oxygens since MTSES modification did not form a high-field-strength site as might be expected if the cysteine residues project into the pore. Addition of the side chain -CH(2)-S-S-CH(3), which is similar to the side chain of methionine, a conserved residue in many potassium channels, resulted in an increased peak current and reduced inactivation rate, hence a higher affinity binding site. Modification of cysteine substituted mutants occurred more readily from the inactivated state confirming that side chains probably rotate into the pore from a buried position when no K ions are in the pore. In conclusion we were able to show that, as for certain potassium channels in higher taxonomic groups, the site(s) responsible for modulation by [K(+)](out) is situated just outside the selectivity filter and is represented by the residues L(369) and F(370) in the jellyfish Shaker channel, jShak2.  (+info)

Neurones of the motor nerve net of the jellyfish Cyanea capillata were axotomized, and voltage-clamped using the whole-cell configuration of the patch-clamp technique.. Outward currents were blocked by a combination of extracellular 4-aminopyridine (4-AP) and intracellular Cs+, tetraethylammonium (TEA+) and 4-AP.. Under normal conditions, the inward current consisted of a fast, transient current which could be abolished by removal of extracellular Na+ and whose reversal potential was dependent on the extracellular Na+ concentration.. This current was completely insensitive to tetrodotoxin (TTX), saxitoxin (STX) and conotoxin GIIIA but could be blocked by extracellular Cd2+, lidocaine, W7 [N-(6 aminohexyl)-5-chloro-1-napthalenesulphonamide] and verapamil.. Inactivation was voltage-dependent with a Vh of −15mV, and was unaffected by veratridine, batrachotoxin (BTX), sea anemone toxin and scorpion (Leiurus) venom. Reactivation required repolarization to a negative membrane potential for 12 ms for ...
Jellyfish are important components of marine food webs and form problematic blooms that negatively impact human enterprise. Jellyfish of the genus Aurelia (Class Scyphozoa) are common bloom-formers in the Gulf of Mexico (GoM). Aurelia have a multi-modal life cycle where the perennial polyp produces seasonal medusae. Abiotic tolerance ranges and limits strongly influence the distribution of marine species but are unknown for most jellyfish species. Tolerance limits for survival are crucial to understanding present polyp distribution and how distribution may change in climate change scenarios. We sampled and barcoded two Aurelia species from the GoM, namely Aurelia sp. 9 and a possible new species found offshore (Aurelia sp. new). Planulae obtained from one medusa of Aurelia sp. new, and five medusae of Aurelia sp. 9 were used to establish laboratory cultures. Polyps of Aurelia coerulea, a species native to Japan but introduced in North America, Australia, and Europe, were obtained from a local aquarium,
The Scyphozoa is a class of the phylum Cnidaria, sometimes referred to as the true jellyfish. There are 200 species. The name Scyphozoa comes from a Greek word which refers to the cup shape of the jellyfish. The medusa form is the dominant life form, as opposed to the polyp. They eat plankton, small crustaceans and fish larvae, which they capture using stinging cells called nematocysts. The nematocysts are attached to the tentacles that hang down from the edge of the umbrella dome. Scyphozoans have an internal jelly-like material. They have no hard parts, no head, and no specialized organs for respiration or excretion. Unlike other types of jellyfish, scyphozoans lack a velum, a circular membrane which propels other jellyfish through the water. Scyphozoans move through the water by contracting and relaxing the muscles of their umbrella. ...
Molecular analyses have led to an increased knowledge of the number and distribution of morphologically cryptic species in the worlds oceans and, concomitantly, to the identification of non-indigenous species (NIS). Traditional taxonomy and accurate delimitation of species life histories and autecology lag far behind, however, even for the most widely distributed taxa, such as the moon jellyfish Aurelia (Cnidaria, Scyphozoa) species complex. Here we analysed mitochondrial cytochrome c oxidase subunit I (COI) and nuclear 28S ribosomal RNA (28S) gene sequences to assign polyps, ephyrae, and medusae collected in the Mediterranean Sea to different phylogenetic species. We find evidence for three Aurelia species, none of which are referable to the type species of the genus, Aurelia aurita (Linnaeus, 1758), and describe the anatomical, morphometric, and developmental variation within and between them. We identify Aurelia coerulea von Lendenfeld, 1884 and Aurelia solida Browne, 1905 as established ...
Title:Crude Venom from Nematocysts of the Jellyfish Pelagia noctiluca as a Tool to Study Cell Physiology. VOLUME: 15 ISSUE: 2. Author(s):Rossana Morabito, Giuseppina L. Spada, Rosalia Crupi, Emanuela Esposito and Angela Marino. Affiliation:Department of Biological and Environmental Sciences, Viale F. Stagno DAlcontres 31, 98166 Messina, Italy.. Keywords:Biological assays, crude venom, jellyfish, nematocysts, Pelagia noctiluca.. Abstract:Marine animals represent a source of novel bioactive compounds considered as a good research model, whose mechanism of action is intriguing and still under debate. Among stinging animals, Cnidarians differentiated highly specialized cells, termed nematocytes, containing a capsule fluid with toxins and an inverted tubule, synergistically responsible for mechanisms of defence and predation. Such compounds include proteins and secondary metabolites with toxic action. With the aim of better elucidating the effects of Cnidarian venom upon cell targets, this short ...
Identifying Features: The Moon Jellyfish (Aurelia labiata) ranges from 25 to 40 cm (9.8 to 15.8 in) in diameter and can be easily recognized by the four horseshoe-shaped rings on its bell. A. labiata is not perfectly circular, but has multiple ridges around its bell between its rhopalia. It also has four oral arms leading up to its mouth and many short tentacles all around its bell. A. labiata may be confused with A. aurita, a closely related species found along the eastern Atlantic coast of Northern Europe and the western Atlantic coast of North America in New England and Eastern Canada.. Habitat: Moon jellyfish are found along the west coast of North America all the way from southern Alaska to southern California and as far out into the open ocean as Hawaii. Moon Jellyfish can be found up to 1000m (3280ft) below sea level in waters ranging from -6 to 31 degrees celsius; but often float near the surface, especially in bays and harbours. In the summer and through autumn, moon jelly fish are ...
Lions mane jellyfish (Cyanea capillata) stings cause severe pain and can lead to dangerous systemic effects, including Irukandji-like syndrome. As is the case for most cnidarian stings, recommended medical protocols in response to such stings lack rigorous scientific support. In this study, we sought to evaluate potential first aid care protocols using previously described envenomation models that allow for direct measurements of venom activity. We found that seawater rinsing, the most commonly recommended method of tentacle removal for this species, induced significant increases in venom delivery, while rinsing with vinegar or Sting No More® Spray did not. Post-sting temperature treatments affected sting severity, with 40 min of hot-pack treatment reducing lysis of sheeps blood (in agar plates), a direct representation of venom load, by over 90%. Ice pack treatment had no effect on sting severity. These results indicate that sting management protocols for Cyanea need to be revised immediately to
Author: Reiländer, Helmut et al.; Genre: Journal Article; Published in Print: 1996-02-06; Title: Functional Expression of the Aequorea victoria Green Fluorescent Protein in Insect Cells Using the Baculovirus Expression System
Intracellular Ca2+ overload induced by extracellular Ca2+ entry has previously been confirmed to be an important mechanism for the cardiotoxicity as well as the acute heart dysfunction induced by jellyfish venom, while the underlying mechanism remains to be elucidated. Under extracellular Ca2+-free or Ca2+-containing conditions, the Ca2+ fluorescence in isolated adult mouse cardiomyocytes pre-incubated with tentacle extract (TE) from the jellyfish Cyanea capillata and β blockers was scanned by laser scanning confocal microscope. Then, the cyclic adenosine monophosphate (cAMP) concentration and protein kinase A (PKA) activity in primary neonatal rat ventricular cardiomyocytes were determined by ELISA assay. Furthermore, the effect of propranolol against the cardiotoxicity of TE was evaluated in Langendorff-perfused rat hearts and intact rats. The increase of intracellular Ca2+ fluorescence signal by TE was significantly attenuated and delayed when the extracellular Ca2+ was removed. The β adrenergic
Lions mane jellyfish (Cyanea capillata), also known as Hair Jelly and Sea Blubber, are a type of jellyfish which are mostly found in north Atlantic and north Pacific waters. The stings of these jellyfish are painful but not fatal. The species is found near the coast of the U.S. shore line.. The lions mane jellyfish can grow up to 2 m width by its pileus (bell) and its tentacles up to 30 m long. The largest Lions Mane Jelly recorded was 120 FT, but most jellyfish are far smaller, usually some 30 cm by pileus width and up to 50 cm by tentacle length. It eats mainly plankton and is itself eaten by sunfish, sea turtles and some seabirds. Like all jellyfish, it lives only for one year.. A group of jellyfish is called a smack.. ...
Description: Ninety-five percent or more of the weight of the Moon jellyfish is water; it has no brain, eyes or heart. The whitish color of its bell or moon-shaped dome often shows shades of blue, pink or purple - color believed to depend on its diet. The four horseshoe-shaped reproductive organs can be seen in the middle of its dome. Fringe-like tentacles are around the dome. The tentacles are lined with stinging cells (nematocysts) that can be used to sting prey. The jellyfish is also coated with a sticky mucous that collects prey. The feeding tube is short and stout, with four long oral arms with frilly margins around the mouth. They move about and stay at the top by pulsations of the bell.. Size: The Moon jellyfish ranges between 2-15 inches (5-38 cm) in diameter, with average diameter being about seven inches (17.8 cm) and three inches (7.6 cm) tall.. Behavior: Moon jellyfish tend to live alone but water currents and wind may tend to steer them in groups called blooms. They swim ...
Luminescent Jellyfish, Pelagia Noctiluca, France, Mediterranean Sea Photographic Print by Reinhard Dirscherl. Find art you love and shop high-quality art prints, photographs, framed artworks and posters at Art.com. 100% satisfaction guaranteed.
This study was performed to explore other potential mechanisms underlying hemolysis in addition to pore-formation of tentacle extract (TE) from the jellyfish Cyanea capillata. A dose-dependent increase of hemolysis was observed in rat erythrocyte suspensions and the hemolytic activity of TE was enhanced in the presence of Ca2+, which was attenuated by Ca2+ channel blockers (Diltiazem, Verapamil and Nifedipine). Direct intracellular Ca2+ increase was observed after TE treatment by confocal laser scanning microscopy, and the Ca2+ increase could be depressed by Diltiazem. The osmotic protectant polyethylenglycol (PEG) significantly blocked hemolysis with a molecular mass exceeding 4000 Da. These results support a pore-forming mechanism of TE in the erythrocyte membrane, which is consistent with previous studies by us and other groups. The concentration of malondialdehyde (MDA), an important marker of lipid peroxidation, increased dose-dependently in rat erythrocytes after TE treatment, while in vitro
Their behavior depends on a number of external conditions, in particular, food supply. Aurelia swim by pulsations of the bell-shaped upper part of the anima. Swimming mostly functions to keep the animal at the surface of the water rather than to make progress through the water. They swim horizontally, keeping the bell near the surface at all times. This allows the tenticles to be spread over the largest possible area, in order to better catch food. The coronal muscle allows the animal to pulsate in order to move. Impulses to contract are sent by way of the subumbrellar nerve net and are nervous in origin. The Moon Jelly has rhopalial centers, which allow it to control the pulsations. As the oxygen rate in the water goes down, so too does the resiratory rate of the jellyfish.. ...
Rhizostomae or Rhizostomeae is an order of jellyfish. Species of this order have neither tentacles nor other structures at the bells edges. Instead, they have eight highly branched oral arms, along which there are suctorial minimouth orifices. (This is in contrast to other scyphozoans, which have four of these arms.) These oral arms become fused as they approach the central part of the jellyfish. The mouth of the animal is also subdivided into minute pores that are linked to coelenteron. Jellyfish species fished on a commercial basis for human consumption (both as a delicacy and for use in traditional medicine) are all from this order and include members of the families Catostylidae, Lobonematidae, Rhizostomatidae and Stomolophidae. The jellyfish are typically dried and/or salted. In China, which was the first country documented to use jellyfish as food, this has been practiced at least since the year 300 CE, but they are also commonly consumed in Japan (the largest consumer of jellyfish ...
A translucent brown to reddish jellyfish with a thick mane of hundreds of long hair-like tentacles; the oldest of which are coloured dark red. Their tentacles are thin, and often found in a mass that looks like a lions mane. They may up to about 3 inches across. The Australian Spotted Jellyfish (Phyllorhiza punctata) is also known as the White-spotted jellyfish. Larger jellyfish can capture and devour large crustaceans and other marine organisms. Can it sting you? Where it is Found: Cannonball jellies are found in the Gulf of Mexico and both the Atlantic and Pacific Oceans. Siphonophores are colonial, and are made up of four different polyps-pneumatophores, which make up the gas float, gastrozooida, which are feeding tentacles, dactylozoodis, polyps that capture prey, and gonozooids, which are used for reproduction. Their color are brown or olive with creamy white in color. Moon Jellyfish ©Paul Naylor www.marinephoto.co.uk, Moon jellyfish - These are the most common jellyfish in UK seas and ...
Cassiopea has made excellent progress with its key pipeline projects including, Winlevi (acne) that successfully completed phase III and will be filed for US approval in Q2 2019, and Breezula (alopecia/hair loss) that successfully completed phase II and will start pivotal phase III trials in Q4 2019, with peak sales of EUR 400+ mn and EUR ~350 mn, respectively. To maximize long-term value, Cassiopea plans to build up an own specialist dermatology sales force in the lucrative US market and seek commercialization partners outside the US. We assume a US (NASDAQ) listing around US approval of Winlevi to fund US operations and fully develop its remaining pipeline projects. Largest shareholder Cosmo provided a credit line of up to EUR 20 mn to bridge a short-term funding gap and avoid considerable share dilution at the current low share price until Cassiopea reaches key value inflection points.. Key catalysts include:. ...
Certified Nutraceuticals Inc. (San Diego, CA) announced the results of new, unpublished research that confirms the immunostimulatory effects of its KollaJell jellyfish collagen.
Although it is generally appreciated that a fully grown aquatic animal will swim faster than when it was smaller, the precise relationship between speed and body size over a life history is dictated by scale-dependent hydrodynamics. Much of our understanding for this scale dependency comes from comparisons between species that differ in body mass by many orders of magnitude (e.g. Daniel et al., 1992; Lighthill, 1975; Wu, 1977). These comparisons illustrate that thrust is generated primarily by viscous force at the size of spermatozoa, inertial force at the size of adult fish and a combination of these forces at intermediate sizes. Such broad comparisons are useful for understanding the major fluid forces that play a role in the hydrodynamics of a growing animal but cannot provide predictive explanations for how swimming performance (e.g. speed and cost of transport) should change over the ontogeny of individual species.. Ontogenetic changes in swimming kinematics have been most thoroughly ...
The moon jellyfish is a common jelly recognized by its four horseshoe-shaped gonads. Learn moon jellyfish facts, including its diet and habitat.
AbstractBackground More than 200 Scyphozoa species have been described, but few have been properly studied regarding their chemical and genetic characteristics.Catostylus tagi, an edible Scyphozoa and the sole European Catostylidae, occurs in summer at Tagus and Sado estuaries. Neither a systema...
As a member of the wwPDB, the RCSB PDB curates and annotates PDB data according to agreed upon standards. The RCSB PDB also provides a variety of tools and resources. Users can perform simple and advanced searches based on annotations relating to sequence, structure and function. These molecules are visualized, downloaded, and analyzed by users who range from students to specialized scientists.
Phacellophora camtschatica, known as the fried egg jellyfish or egg-yolk jellyfish, is a very large jellyfish, with a bell up to 60 cm (2 ft) in diameter and sixteen clusters of up to a few dozen tentacles, each up to 6 meters (20 ft) long. However, the life cycle of P. camtschatica has not been formally described. The species they reported were Phacellophora camtschatica, Cyanea capillata, Aurelia labiata and Aequorea victoria. Atolla wyvillei, Stomolophus meleagris, Desmonema comatum and Tamoya haplonema were reported just a few times and Detailed tissue-specific study is needed to define the significance of these differences to interpreting trophic linkages for jellies. Photo: 2016 MBARI A female Haliphron atlanticus octopus holding a Phacellophora camtschatica (egg-yolk jellyfish) in her arms. The fried egg jelly and all other members of the phylum Cnidaria are diploblastic. During June 2000, Phacellophora camtschatica was only encountered at one station and was therefore not a dominant ...
The husbandry of jellyfish started in 1965 at the Ueno Zoos Aquarium in Tokyo just by a lucky chance. In one of the reserve tanks ephyra larvae of the Moon jellyfish (Aurelia aurita) were one day observed, quite unexpectedly. These creatures awoke the interest of the aquarium curator and he succeeded by trial and error to keep and exhibit this jellyfish continuously. It was the first time that an ...
The jellyfish are coming!. According to the Marine Conservation Society, increasing numbers of jellyfish - presumably encouraged by the hot weather - are currently bobbing along Britains coastline.. This probably means many bathers will be having a painful aquatic encounter in the next couple of weeks - and some unlucky punters will probably get treated in a novel way.. Help on tap. Thats because lots of people still believe its a good idea to wee on someone whos been stung by a jellyfish.. Bizarre as it sounds, this is true. As temperatures soar this weekend, hundreds of British beachgoers will have their hands poised on their zippers, gunslinger-style, ready to pull down at a moments notice and help anyone running from the water in pain.. Dangerous cure. The hoary old myth that urinating on jellyfish stings lessens the pain is still surprisingly popular in the UK, despite medically making no sense at all. (Really, think about it. Its like saying you should vomit on someone with ...
What other organisms compete with the flower hat jellyfish for resources??? your own Pins on Pinterest The species feeds on zooplankton, rather than fish. Cotylorhiza tuberculata is better known as the fried egg jellyfish or the Mediterranean jellyfish. Flower hat jellies are found off southern Japan, Argentina, and Brazil. But the transparency belies a brighter side. Scientists have created green mice that glow green when hit by blue light by inserting the GFP gene from the crystal jelly into the mice. Find (og gem) dine egne pins på Pinterest. They have three main parts: umbrella, oral arms, and stinging tentacles. Its bell can reach three feet across, its arms can be 20 feet long and its stinging tentacles 25 feet long. 16 Ocean Creatures That Live in Total Darkness, Fish Food: 13 Marine Animals Named by Hungry Biologists, Edith Widder on Mimicking the Glow of Deep Sea Fish to Discover New Species, Psychedelic Jellyfish Dominates the Deep-Sea Dance Floor, Three Quarters of Deep-Sea ...
According to the National Science Foundation, jellyfish are about the only living creatures in some 400 ocean dead zones around the world. This suggests that they survive pollution better than other creatures. The NSF noted that Europes horribly polluted Black Sea was transformed into a veritable jellytorium in the 90s.. A big NSF report also detailed jellitorium-like conditions in Australia, the Gulf of Mexico and the U.S. East coast.. It appears that warm temperatures may be allowing some jellyfish to expand their range.. But its not a linear correlation. In the Bering Sea, for example, jellyfish populations exploded in the 1990s - but moderated after 2000, when the water warmed demonstrably. (Of course, one possibility is that the population decrease was related not to water temps, but rather to overfeeding by the massive numbers of jellyfish, which could have knocked back the plankton they feed on, leading to lower numbers of jellyfish. If so, that gives me pause, because it suggests ...
The dinoflagellate Noctiluca scintillans (Noctiluca) has the ability to reproduce sexually, which may help to increase or restore its population size during periods of blooms or environmental stress. Here, we documented for the first time a marine ciliate Strombidium sp. that feeds on Noctilucas progametes undergoing stages 5 to 9 of nuclear division. This ciliate frequently swam on or around gametogenic and some vegetative Noctiluca cells. The ciliates associated with gametogenic cells had significantly lower swimming speed and changed direction more frequently than those associated with vegetative cells, which overall increased their time spent around the food patches (progametes). This trophic interaction constitutes an upside-down predator -prey link, in which ciliates within the typical size range of Noctiluca prey, become the predators. Based on the phylogenetic tree (maximum-likelihood), there are 14 environmental clones similar to Strombidium sp. found in other coastal waters, where ...
Abstract: An evaluation was performed to investigate the use of contact plates in place of Petri plates to perform environmental monitoring settle plates. A Petri plate has approximately 2.5 times the surface area of a contact plate and a different agar profile for exposure to air. Petri plates also have plastic walls that extend above the agar surface and may affect air flows. To evaluate the possible use of contact plates, analysis of capture and recovery of bioburden was performed in a number of different environments, with differing numbers of exposed plates. Overall, a good correlation was shown when two contact plates were used as a substitute for one Petri plate with a 4-hour exposure time. The ability to use contact plates for a settle plate test allows the use of a single consumable, the contact plate, to be stocked for environmental monitoring testing ...
We are committed to providing our customers with high quality and cheap bongs in Canada. Native Shoes are the child of both the past and the future; the perfect combination of history and modernism.These kicks are progressive in design, casual, fun and accessible for all types of people. Jellyfish Shirt: shop online for Jellyfish Shirt on International Shops Online. Shop online worldwide Highest Quality Products. The jellyfish will be shipped to you alive in plastic bags. Shop the latest Chromecasts, mobiles, Speakers & Smart Displays at Google Store. Jellyfish is your global digital partner. Everyday low prices and a price match guarantee. Buy the quantity you need. All online orders over $149.00 ship for free in Canada. Explore our specific collection for the US which our perfect for babies, children and the young at heart! View coupon codes for Best Buy Buy Live JellyFish & JellyFish Aquariums in Canada We are an online dispensary specializing in CBD oil, edibles, topicals & pet products. ...
Many jellyfish are transparent, and they have seemingly simple movements and few visible interacting parts. They should, therefore, be easy to synthesize with man-made parts, but thats not what bioengineers discovered when they recently built a jellyfish mimic from rat heart cells attached to a silicone frame.. A team of Unites States collaborators produced a structure that, when energized by an external electrical shock, flexed and moved like a jellyfish in a water tank. Nature News posted a video showing their construct in motion.1. Just what hurdles did the research team overcome in order to achieve their modest results?. The bioengineers used a systematic design strategy to reverse engineer a muscular pump, according to the technical report in Nature Biotechnology. They also wrote, The constructs, termed medusoids, were designed with computer simulations and experiments to match key determinants of jellyfish propulsion and feeding performance by quantitatively mimicking structural ...
Complete larval development from newly hatched larvae up to the juvenile stage was successfully achieved in the Australian shovel-nosed lobster Thenus australiensis under laboratory conditions. The larvae of this species passed through four phyllosoma stages (each stage has a single instar), and developed into the first juvenile stage via a post-larval, nisto stage. The shortest and mean durations from hatching to metamorphosis at a water temperature of 25°C were 32 and 38 days, respectively. Morphologies of body and appendages for all four phyllosoma stages and the nisto stage were described. The phyllosomas were fed exclusively on the jellyfish Aurelia aurita throughout their culture. Our results indicate that jellyfish may be a viable diet for T. australiensis phyllosomas in culture and may therefore be useful for commercial-scale lobster production.. ...
WEDNESDAY, Feb. 19, 2020 (HealthDay News) - The mystery of stinging water has been solved, scientists say.. Stinging water is the seawater near and around upside-down jellyfish (Cassiopea) - and swimmers can get stinging, itchy skin while submerged in it, even if they have no direct contact with the creatures themselves.. But it wasnt clear in the past if the jellyfish were to blame for this discomfort, since several other possible causes had been suggested, including severed jellyfish tentacles, sea lice, anemones and other stinging marine animals.. In this new study, researchers concluded that stinging water is caused by toxin-filled mucus that the jellyfish release into the water. The mucus contains gyrating balls of stinging cells called cassiosomes.. This discovery was both a surprise and a long-awaited resolution to the mystery of stinging water, said study author Cheryl Ames, a research associate at the Smithsonians National Museum of Natural History in Washington, D.C., and an ...
Looking for Noctiluca? Find out information about Noctiluca. a genus of protozoa of the class Mastigophora of the order Dinoflagellata. The spherical body is 2 to 3 mm in diameter and has a mobile, contractive... Explanation of Noctiluca
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The freshwater jellyfish found in Wisconsin are one of several species of Craspedacusta native to China. Two species (C. sowerbii and C. sinensis) live in the Yangtze River - the worlds third longest river and one so vast it makes the Wisconsin River seem like a trout stream! Freshwater jellyfish were first reported in North America as early as 1884. Sightings in Wisconsin date back to 1969. Much more remains to be learned about these fascinating creatures. Although they probably evolved from estuarine species, themselves descendents of ocean jellyfish, little is known about the evolution of freshwater jellyfish. Thats because jellyfish leave no fossil records.. ...
A team of scientists from the University of Texas Marine Science Institute, including students from California and China, assessed the effects of crude oil exposure on adult and larval gelatinous zooplankton species - some commonly referred to as jellyfish.
Isolated from a dead common jellyfish (Aurelia aurita) found at the shore of Helgoland Island (exact location 54.188 N 7.875 E) on the 5th of June 2013 ...
Cnidarian sexual reproduction often involves a complex life cycle with both polyp and medusa stages. For example, in Scyphozoa (jellyfish) and Cubozoa (box jellies) a larva swims until it finds a good site, and then becomes a polyp. This grows normally but then absorbs its tentacles and splits horizontally into a series of disks that become juvenile medusae, a process called strobilation. The juveniles swim off and slowly grow to maturity, while the polyp re-grows and may continue strobilating periodically. The adults have gonads in the gastroderm, and these release ova and sperm into the water in the breeding season.[9][10]. This phenomenon of succession of differently organized generations (one asexually reproducing, sessile polyp, followed by a free-swimming medusa or a sessile polyp that reproduces sexually)[24] is sometimes called alternation of asexual and sexual phases or metagenesis, but should not be confused with the alternation of generations as found in plants.. Shortened forms ...
Jellyfish-induced gill pathology relies upon occasional diagnostic observations yet the extent and impact of jellyfish blooms on aquaculture may be significant. Idiopathic gill lesions are often observed in apparently healthy fish. This study exposed Atlantic salmon (Salmo salar L.) smolts to macerated Cyanea capillata at 2.5 and 5 g/L for 2 hr under controlled laboratory conditions. Blood chemistry and gill histopathology were examined over a subsequent 4-week period. Fish showed an acute response to the presence of jellyfish, including characteristic external whiplash discoloration of the skin and acute increases in blood electrolytes and CO2 concentration; however, these were resolved within 4 days after exposure ...
Rhizostoma pulmo has a solid appearance. It varies in colour from whitish pale or yellow to shades of green, blue, pink or brown. The umbrella margin is divided into a number of semi-circular lobe like extensions (marginal velar lappets). Beneath the bell is a large manubrium, consisting of a short pillar-like basal stem, followed by sixteen, three winged epaulets with frilled mouth openings. It then divides into four pairs of oral arms that consist of three winged portions, followed by three winged elongated terminal appendages (Russell, 1970). Mature males have blue gonads whereas, ripe females are reddish brown. When exposed to air their nematocyst warts give the umbrella surface a matt like appearance. The large crustacean Hyperia galba can be found throughout the body of the jellyfish and more commonly in its gastric or gonad pouches. ...
Wound healing and recovery from injury were investigated in eggs and larvae of herring (Clupea harengus L.), plaice (Pleuronectes platessa L.) and salmon (Salmo salar L.). The resistance of herring eggs to mecha.nical damage was first examined. The chorion of eggs before and just after fertilisation could be burst by loads of 4-30 g but eggs 5 h post-fertilisation could withstand over 1000 g without bursting. Resistance remained high until just before hatching when it decreased to 20-680 g. The vitelline membrane, however, showed a lower resistance at all stages. Early herring and plaice larvae were caught and eaten by medusae (Aurelia aurita, Tiaropsis multiserrata, Bougainvillea sp.), hydroids (Sarsia sp.), megalopa larvae of the prawn Nephrops norvegicus and adult mysids. Early herring larvae survived minor stings from an Aurelia ephyra, and also experimentally inflicted lesions such as superficial scratches, suction wounds and amputation of up to 2 mm of the tail in sea water. The caudal ...
Jellyfish are beautiful deep sea animals from the Cnidaria family. Jellyfish can be considered both deadly and helpful. Read through to know some facts like these about jellyfish.
Such a grand statement must be supported by fact, of course. Although it is in the Cnidaria family, it is not a true jellyfish, which is in the class Scyphozoa, not Hydrozoa. This tiny jellyfishes amazing ability to virtually live forever is something that the scientific and medical community needs to recognize more. A.K.A. While the humans have been looking for the elixir of life throughout every period of history, it appears that there is one species of jellyfish that are actually immortal. 1663, p. 15).Period of reproductive maturity recorded for Carrie Bow Cay, Belize is from 17th to 25th May, during which the samples collected had … McCrady, 1859 Umbrella 4-11 mm high, bell-shaped, higher than wide, walls uniformly thick; manubrium large, cross-shaped in transverse section; 4 radial canals that continue into 4 compact vacuolated endodermal masses situated above digestive part of manubrium; 80-120 closely spaced marginal tentacles; gonads interradial, mature females often with developing ...
Gershwin, L.-A. Zeidler, W., 2008. Some new and previously unrecorded Scyphomedusae (Cnidaria: Scyphozoa) from southern Australian coastal waters., Zootaxa, Vol. 1744: 1-18 ...
Though some reports suggest jellyfish are taking over the worlds oceans, long-term records of these gelatinous animals fail to show a global increase in jellyfish blooms likely caused by pollution, warming, coastal development and other human influences.
Mouth . It has a mouth surrounded by extensible tentacles, and a lower end that is adapted for attachment to a surface. #neet #aiims #bsc PLEASE LIKE AND SUBSCRIBE AND COMMENT IF YOU NEED PARTICULAR TOPIC VIDEO. Polyp present a tubular shape with the mouth facing the water upwards,while medusa present a bell shape with the mouth facing the water downwards. Those cnidarians which exist in both forms exhibit alternation of generation (Metagenesis), i.e., polyps produce medusae asexually and medusae form the polyps sexually (e.g., Obelia). In contrast, medusa are a more evolved form of cnidarians, being mobile, reproducing sexually which promotes genetic diversity, and presenting photoreceptors and statocytes as sense organs. Polyps are sessile. What is the mix for pointing paving slabs? An anemone is the polyp shape. 0 Comment. It is distinct from the free-swimming medusa. The medusa is umbrella like and usually free swimming. Join now. The mouth of polyps faces the water upwards. Polyps possess a ...
(PhysOrg.com) -- Over-fished commercial stocks of plankton-eating fish have been replaced in several locations by jellyfish species. This appears to be something of a paradox because fish move quickly and can see their prey, which suggests their capture of prey should be much more efficient than for jellyfish that move slowly and have to make contact with their prey to know they are present. Now a team of scientists in Spain and the US have discovered he jellyfishes success is partly based on their large body size and its energy efficiency.
Jellyfish Sting home remedy discussion (0 comments): i cant believe i got a jellyfish sting!!! it itched so bad until i want into the ocean...
TY - JOUR. T1 - Neuropeptides trigger oocyte maturation and subsequent spawning in the hydrozoan jellyfish Cytaeis uchidae. AU - Takeda, Noriyo. AU - Nakajima, Yoko. AU - Koizumi, Osamu. AU - Fujisawa, Toshitaka. AU - Takahashi, Toshio. AU - Matsumoto, Midori. AU - Deguchi, Ryusaku. PY - 2013/3/1. Y1 - 2013/3/1. N2 - Oocyte maturation and subsequent spawning in hydrozoan jellyfish are generally triggered by light-dark cycles. To examine if the initiation of the maturation process after light stimulus is mediated by neurotransmitters, neuropeptides isolated originally from Hydra magnipapillata were applied to sexually mature female medusae of the hydrozoan jellyfish Cytaeis uchidae. Among the Hydra neuropeptides tested, Hym-53 (NPYPGLW-NH2), as well as a nonphysiological peptide, CGLWamide (CGLW-NH2), were most effective in inducing oocyte maturation and spawning. Hym-355 (FPQSFLPRG-NH2) also triggered these events, but the stimulatory effect was weaker. Since Hym-53-OH (NPYPGLW) and Hym-355-OH ...
Unlike many jellyfish, the multiple-tentacled box jellyfish Chironex fleckeri is a fast and agile swimmer and is rarely ever found washed up on beaches. It can swim at up to three knots and manoeuvre around pylons and piers. Although Carukia barnesi is also a box jellyfish, it is not as proficient at swimming as Chironex fleckeri. All cubozoans have eyes so that they can hunt prey and avoid objects in the water. Each jellyfish has 24 eyes clustered into four groups of six on each side of its box-shaped body. There are two types of eye in each cluster two complex eyes similar to human eyes (with retinas, lenses and corneas) and two simple pit eyes and two slit eyes. Although cubozoan jellyfish do not a have a brain (they have neurons concentrated in four nerve centres), recent studies indicate that they can form images ...
Bell and trailing tentacles of a box jellyfish (Cubozoa). Box jellyfish are relatives of true jellyfish, but have a cubic bell and tentacles extending from each lower corner. Unlike true jellyfish they have complex eyes and are active swimmers, avoiding obstacles and chasing after prey. They feed mainly on small fish, which they catch with their stinging tentacles. Some species of box jellyfish have a sting that is rapidly fatal to humans. Filmed in the Gulf of Thailand, near Koh Pha Ngan Island. - Stock Video Clip K004/8614
Using a radioimmunoassay for the sequence Arg-Phe-NH2 (RFamide), we have isolated the peptide less than Glu-Trp-Leu-Lys-Gly-Arg-Phe-NH2 (Pol-RFamide II) from acetic acid extracts of the hydromedusa Polyorchis penicillatus. This peptide is a neuropeptide and constitutes a peptide family together with less than Glu-Leu-Leu-Gly-Gly-Arg-Phe-NH2 (Pol-RFamide I), the first neuropeptide isolated from Polyorchis, and less than Glu-Gly-Arg-Phe-NH2 (Antho-RFamide), a neuropeptide isolated from sea anemones and sea pansies ...
When Kozmik looked for box jellyfish genes that are involved in sight, he found that their opsin protein is also similar to the versions found in vertebrate eyes. With further tests, Kozmik confirmed that the jellyfishs opsin is a fully functioning visual protein. It sticks to retinal and is particularly sensitive to blue-green light. The similarities didnt stop there. Kozmik found that the chain of proteins that carry the message passed on by opsin, are again similar to those used by vertebrates. And just as our eyes use the dark pigment melanin, so do those of the box jellyfish. Amid its genome, Kozmik found the jellyfish versions of human gene called Oca2 and Mitf that are essential for creating melanin. The genes are switched on in a part of the jellyfish eye thats littered with granules of pigment, which were identified as melanin through chemical tests. Parallel or conserved? Despite the massive evolutionary gulf that separates jellyfish and vertebrates, both groups construct their eyes ...
Do all jellyfish make light? What is the function of jellyfish bioluminescence?. It is estimated that about 50% of jellyfish are bioluminescent. There are many different types represented, including siphonophores (related to the Portuguese man-o-war), medusae, sea pens and other soft corals, and ctenophores (comb jellies). The greatest diversity of luminescent jellyfish occurs in the deep sea, where just about every kind of jellyfish is luminescent. Most jellyfish bioluminescence is used for defense against predators. Jellyfish such as comb jellies produce bright flashes to startle a predator, others such as siphonophores can produce a chain of light or release thousands of glowing particles into the water as a mimic of small plankton to confuse the predator. Others produce a glowing slime that can stick to a potential predator and make it vulnerable to its predators. Some jellyfish can release their tentacles as glowing decoys. So you see that there are many strategies for using bioluminescence ...
Looking for online definition of Polyp and medusa in the Medical Dictionary? Polyp and medusa explanation free. What is Polyp and medusa? Meaning of Polyp and medusa medical term. What does Polyp and medusa mean?
Looking for online definition of Caput medusa in the Medical Dictionary? Caput medusa explanation free. What is Caput medusa? Meaning of Caput medusa medical term. What does Caput medusa mean?
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The fatty acids composition in different parts of full-grown Rhopilema esculentum jellyfish from Yellow Sea was investigated. The lipids, extracted from the umbrella and oral arms and gonads of R.eculentum jellyfish, respectively were analysed by combined capillary gas chromatography/mass spectrometry. The results show that there are more than thirty kinds of fatty acids in jellyfish, and the fatty acid compositions of three parts of R. esculentum are almost the same. In the three parts, percentages of polyunsaturated fatty acids (~PUFA ) are high, and range from 36.23% to 38.74%. Docosahexaenoic acid (DHA), eicosatetraenoic acid (AA) and eicosapentaenoic acid (EPA) are three major PUFA.
...Despite its primitive structure the North American comb jellyfish can...The North American comb jellyfish Mnemiopsis leidyi has long be...Like many other jellyfish Mnemiopsis leidyi has a large gelati...Able to catch the worlds most vigilant plankton ...,Voracious,comb,jellyfish,invisible,to,prey,biological,biology news articles,biology news today,latest biology news,current biology news,biology newsletters
Schools of creepy brownish jellyfish known for their painful stings are lurking in San Francisco Bay waving their long, poisonous tentacles like they own the place. Dozens, if not hundreds, of sea creatures known as Pacific sea nettles have been spotted in the bay feeding on small fish and plankton when they arent stinging swimmers. Nutrient-rich waterMarine biologists believe strong coastal upwellings of nutrient-rich water and northwest winds are responsible for the influx of nettles, which usually reside over vast stretches of the Pacific and Indian oceans. Vast blooms of sea nettles have been known in the past to congregate in one location, sometimes for months at a time, clogging fishing nets and depleting the water of plankton. Biologists around the world are concerned about an apparent increase in the number and size of jellyfish blooms of all species. Studies are being conducted to determine whether the prevalence of jellyfish, which reproduce both sexually and asexually, has anything to
Jellyfish in general are named after what they look like. Specifically, The Medusa, a character in Greek mythology. One of the Gorgon sisters, her head was capped in locks of live serpents rather than hair. She was so hideous that to behold her would cause any mortal to turn to stone. While Jellyfish have medusa like tentacles than can stink and paralyze you, they are hardly hideous enough to turn you to stone on looks alone…. Medusae are jellys (Cnidaria) with umbrella shaped bodies. Many jellies have long, snakelike tentacles, many sting and are poisonous. They vary from translucent and clear to dark in color.. For more information on Medusa (the ugly one) I suggest DAulaires Book of Greek Myths ...
Three Cassiopea, or upside-down jellyfish, from Bonaire, Dutch Caribbean seen from above in the lab at the Department of Invertebrate Zoology in the Smithsonians National Museum of Natural History. The cloudy matter floating above and to the left of the jellyfish is a mucus that they exude. A team led by
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jellyfish pass through our waters. Most jellyfish along the South Carolina coast are harmless, but in the summer months we get some warm water visitors t
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Background: Despite recent deaths caused by box jellyfish envenomation occurring on the islands of Samui and Pha-ngan in the Gulf of Thailand, many people do not believe box jellyfish can kill humans and many people dismiss the problem as insignificant. More evidence has been requested from the communities in order to evaluate the need for and the implementation of sustainable prevention measures. We aimed to determine the magnitude of cases of severe stinging by box jellyfish and describe the characteristics of these cases on the islands of Samui and Pha-ngan in Surat Thani Province from 1997 to 2015. Read More ...
Ranunculus penicillatus subsp. pseudofluitans herbarium specimen from Rickmansworth, VC20 Hertfordshire in 1912 by Rev. Philip Henry Cooke.
Polyps of two moon jellyfish species, Aurelia coerulea and A. relicta, from two Adriatic Sea coastal habitats were incubated under multiple combinations of temperature (14, 21 C), salinity (24, 37 ppt) and food regime (9.3, 18.6, 27.9 g C ind-1 week-1) to comparatively assess how these factors may influence major asexual reproduction processes in the two species. Both species exhibited a shared pattern of budding mode (Directly Budded Polyps: DBP; Stolonal Budded Polyps: SBP), with DBP favoured under low food supply (9.3 g C ind -1 week-1) and low temperature (14 C), and SBP dominant under high temperature (21 C). However, A. coerulea showed an overall higher productivity than A. relicta, in terms of budding and podocyst production rates. Further, A. coerulea exhibited a wide physiological plasticity across different temperatures and salinities as typical adaptation to ecological features of transitional coastal habitats. This may support the hypothesis that the invasion of A. coerulea across ...
Read this Science Presentation or Speech and over 30,000 other research documents. Introduction to Green Fluorescent Protein (gfp).. Introduction to Green Fluorescent Protein (GFP) The green fluorescent protein (GFP) obtained from the jellyfish Aequorea victoria has become one of the most widely researched proteins in biochemistry and cell biology, In early 1960s researcher named Osamu Shimomura set out to find the reason for this luminescence , after harvesting...
Animals. Two strains of transgenic mice, each bearing a jellyfish green fluorescent protein (GFP) reporter, were used. The mPer1::d2EGFP transgenic mouse (termed here Per1::GFP; a gift from Dr. D. McMahon, Vanderbilt University, Nashville, TN) was made with the B6C3F1 hybrid mouse as described previously (Kuhlman et al., 2000). The mice used in the present studies were hemizygous for the d2EGFP transgene, which is a degradable form of GFP.. The calbindin-D28K-bacterial artificial chromosome (BAC)::GFP transgenic mouse (termed here CalB::GFP; a gift from Dr. N. Heintz, Rockefeller University, New York, NY) was made by insertion of enhanced GFP (EGFP) (Yang et al., 1997) in the calbindin BAC (Research Genetics/Invitrogen, Carlsbad, CA) by homologous recombination. The homologous region was upstream of the start codon of the calbindin gene. The first stretch of the sequence included the calbindin-D28K promoter followed by the first linker sequence and then the EGFP construct followed by the second ...
In order to study the pattern of clonal myocyte distribution during mammalian heart development, we have exploited embryo aggregation chimeras using, as cellular markers, an enhanced jellyfish green fluorescent protein (eGFP) transgene and a desmin-promoter-driven, nuclear-localized beta-galactosidase (nlacZ) knock-in. In neonatal, weanling, and adult chimeric atria and ventricles, irregularly formed patches of various sizes rather than highly dispersed cardiomyocytes were observed. Most of the smaller patches and single cardiomyocytes were found in spatial neighborhood of large patches. This indicated largely coherent clonal growth during myocardial histogenesis combined with tangential displacement or active migration of myocytes. The patterns of ventricular walls were simpler than those of the septum and the atria. In the adult heart, large myocardial volumes devoid of eGFP-positive cardiomyocytes indicated a lack of secondary immigration of blood-borne stem cells into the myocardium. The ...
Volume 1 ml (1 mg/ml) Description Anti-GFP (Green Fluorescent Protein) Tag (GF28R) Monoclonal Antibody Clonality | Host Species | Isotype GF28R | Mouse | IgG2b Immunogen GFP from the jellyfish Aequorea Victoria N-terminal peptide-KLH conjugates Specificity Recognizes native and denatured forms of GFP and its variants such as: EGFP, YFP, EYFP, and CFP Purification Protein A affinity chromatography from mouse ascites fluid Application Dot, ELISA, IP, IS, WB Sensitivity WB (with ECL): 1-10ng of purified GFP or GFP fusion proteins Working Condition WB (with ECL): 1:1000-3000 dilution (incubate for 1 hour at room temperature) IS: 1:500-2000 dilution For best results with other assays (e.g.: Dot, ELISA, IP, etc), please determine optimal working dilution by titration test Storage Store at -20 C for 2 years or more. Centrifuge after first thaw to maximize product recovery. Aliquot to avoid repeated freeze-thaw cycles. Store aliquots at 4 C (add 0.05 NaN3) for several days to weeks Images Fig. 1:1000 (1 g/mL)
Medusa Silicone iPhone X Case from Versace Mens Collection. Protected by the Medusa - iPhone case with a three-dimensional Medusa and Versace logo. Compatible with iPhone X.
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Tiny Jellyfish Make Sizable Invasion in Some Oregon Coast Spots - They are a little jellyfish called a Sea Gooseberry, and they resemble bubbles sitting in the sand by themselves
JellyFish - Plant Success - Premium Mycorrhizae & Beneficial Bacteria JellyFish from Plant Success is a blend of mycorrhizal and beneficial bacteria, specifically designed for cuttings and transplants. Known buy some growers as a
A team of researchers from the Huazhong University of Science and Technology located at Wuhan, Hubei province, China, has developed an artificial electronic skin with the inspiration by jellyfish, which reacts by glowing when its in pain. This featured electronic skin can be used in various fields like prosthetics and robotics.. The new e-skin lights up right when it receives pressures more enough to get damaged. the team has taken an inspiration particularly from Atolla jellyfish, a species of jellyfish that can discharge bright light-blazes when it is under threat.. The e-skin has extreme potentials to mimic up to higher range of sensitivity of biological skin. it is optimal sensitive under the restricted range of poor pressure. it is also able to detect minor breeze or touch. the skin sensors dont respond to harmful blow more effectively.. Researchers say such artificial skins get damaged easily due to insufficient sensitivity across a certain point. However, the biological skins are ...
Stock Photo of Jimble Box Jellyfish Carybdea rastoni. High Quality Jimble Box Jellyfish Images and Gloss Prints are available from Oceanwide Images Stock Photo Library.
Supplementary MaterialsSupplementary Information 41598_2019_40109_MOESM1_ESM. and presence of some proteins bands. Furthermore, enzymatic assays exposed considerable quantitative variants in metalloproteinase activity and PLA2-like activity. Specifically, zymography assays of proteases proven the general existence of abundant metalloproteinases in jellyfish nematocyst venom; nevertheless, the catalytic activities varied among some specific metalloproteinases in the 28C46 greatly?kDa or 57C83?kDa range. Hemolytic assays using sheep erythrocytes recommended a predominant variance in the toxicities of different specific jellyfish venoms, using the difference between your most hemolytic and minimal hemolytic venom as huge as 77-collapse. The existing data suggested exceptional variants in the nematocyst venoms of specific jellyfish. These observations provides a new knowledge of the medical manifestations induced by jellyfish stings and can therefore have essential implications for avoiding and ...
One of the major consequences of global warming is a rise in sea surface temperature which may affect the survival of marine organisms including phytoplankton. Here, we provide experimental evidence for heat-induced cell death in a symbiotic microalga. Shifting Symbiodinium microadriaticum from 27 to 32°C resulted in an increase in mortality, an increase in caspase 3-like activity, and an increase in nitric oxide (NO) production. The caspase-like activity was strongly correlated with the production of NO in thermally challenged microalgae. For this experiment, the application of Ac-DEVD-CHO, a mammalian caspase 3-specific inhibitor, partly prevented (by 65%) the increase in caspase-like activity. To verify the relationship between NO and the caspase-like activity, S. microadriaticum were subsequently incubated with 1.0 mM of the following chemical NO donors: sodium nitroprusside (SNP), S-nitrosoglutathione (GSNO), S-nitroso-N-acetylpenicillamine (SNAP) and ...
When you get right down to it, box jellyfish are little more than goo. The majority of their volume is mesoglea, a non-living, jello-like substance, which is sandwiched between two thin tissue layers. They have no teeth to bite with, no claws to scratch with - none of the weaponry we generally think of when we imagine a ruthless predator. Yet these boneless, brainless boxies are among the deadliest animals on Earth. The box jellyfish Chironex fleckeri can kill a full grown man in less than five minutes, and the venom it wields in its tentacles contains of some of the most rapid, potent toxins in the world.. Exactly what those toxins are, though, has remained somewhat of a mystery. Scientists have been trying to determine the composition of box jelly venom for decades, but have only uncovered some of its potent constituents. And while theres still more to learn, last week, a research team from Queensland, Australia published the most extensive analysis of Chironex venom proteins to date, ...
Diagnosis Cnidaria with mostly epidermal gonads. Original life cycle includes a polyp and a medusa stage. The medusa stage develops the gonads. Polyps always without internal septae and pharynx, mostly radially symmetric. Medusae produced by budding from polyp stage, if such a stage is present. Medusa nearly always with a velum, without rhopalia. The original life cycle has been modified extensively: the medusa stage is often reduced to a mere appendage of the polyp stage, rarely completely reduced. In some orders the polyp stage is strongly or completely reduced. Polyp stages form often colonies of macroscopic size. Integrated colonies including polypoid and medusoid structures can also form complex colonies, giving them it the appearance of an individual organism. [details] ...
Cassiopea species asexually reproduce as polyps through a process called budding, where evagination of tissue at the aboral region produces a motile planuloid bud. This bud swims to and settles on appropriate substrate, where it develops into a scyphistomae. To read more about this, visit our Cassiopea literature page!. Through this process, it is possible to create clonal lines by isolating an aposymbiotic polyp and allowing it to bud continuously. By starting a culture with one polyp and keeping all produced buds genetically isolated, you can create a line of aposymbiotic polyps from a controlled genetic background.. Here we established polyp lines and labs who host them. Theyve agreed to list their contact information for anyone who has questions or requests for polyps. If you have questions about this list or would like to be listed as a point of contact, please Contact Us.. If you would like to request polyps from the Medina Lab, visit our Animal Request page.. ...
Box jellyfish stings are excruciating and occasionally deadly. Scientists have now identified a common, cheap drug that is already on the market and which could be a treatment candidate with further
a b Morandini AC, Marquess AC (2011) Revision of the genus Chrysaora Péron & Lesueur, 1810 (Cnidaria: Scyphozoa). Zootaxa 2464 ...
Until recently, Staurozoa were classified within the Scyphozoa.[22]. There are over 200 species of Scyphozoa, about 50 species ... Scyphozoa are sometimes called true jellyfish, though they are no more truly jellyfish than the others listed here. They have ... The subphylum include the major taxa, Scyphozoa (large jellyfish), Cubozoa (box jellyfish) and Hydrozoa (small jellyfish), and ... in the Scyphozoa, is called a segmenting polyp, or a scyphistoma. Budding produces more scyphistomae and also ephyrae.[22] ...
For example, in Scyphozoa (jellyfish) and Cubozoa (box jellies) a larva swims until it finds a good site, and then becomes a ... Arai, M.N. (1997). A Functional Biology of Scyphozoa. London: Chapman & Hall [p. 316]. ISBN 0-412-45110-7. ... Staurozoa have recently been recognised as a class in their own right rather than a sub-group of Scyphozoa, and the parasitic ... Staurozoa have recently been recognised as a class in their own right rather than a sub-group of Scyphozoa, and the parasitic ...
Scyphozoa: Ulmaridae), southern Gulf of Mexico". Marine Biology Research. 5 (4): 399-403. doi:10.1080/17451000802534907.. ...
Cevik, C., O. B. Derici1, F. Cevik and L. Cavas (2011). First record of Phyllorhiza punctata von Lendenfeld, 1884 (Scyphozoa: ...
klobučnjaki (Scyphozoa) *Aequorea victoria. *Renilla reniformis. *mesečinka (Pelagia noctiluca). *morska peresa (Pennatulacea) ...
For example, in Scyphozoa (jellyfish) and Cubozoa (box jellies) a larva swims until it finds a good site, and then becomes a ... Arai, M.N. (1997). A Functional Biology of Scyphozoa. London: Chapman & Hall [p. 316]. ISBN 0-412-45110-7. ... Staurozoa have recently been recognised as a class in their own right rather than a sub-group of Scyphozoa, and the parasitic ... Several free-swimming species of Cubozoa and Scyphozoa possess balance-sensing statocysts, and some have simple eyes. Not all ...
"Life Cycle Reversal in Aurelia sp.1 (Cnidaria, Scyphozoa)". PLoS ONE 10 (12): e0145314. PMC 4687044. PMID 26690755. doi: ...
Morabito R, Marino A, Dossena S, La Spada G (Jun 2014). "Nematocyst discharge in Pelagia noctiluca (Cnidaria, Scyphozoa) oral ...
"Scyphozoa". Integrated Taxonomic Information System. Retrieved 23 January 2009. "Anthozoa". Integrated Taxonomic Information ...
An Oral arm is an anatomical structure of "true" sea jellies (or Scyphozoans), which belong to the class Scyphozoa. Oral arms ... "Life History and Ecology" and "More on Morphology." Scyphozoa.. ...
Several free-swimming species of Cubozoa and Scyphozoa possess balance-sensing statocysts, and some have simple eyes. Not all ... Staurozoa have recently been recognised as a class in their own right rather than a sub-group of Scyphozoa, and the highly ... swimming Scyphozoa (jellyfish); Cubozoa (box jellies); and Hydrozoa (a diverse group that includes all the freshwater ...
De skiifkwabben (Latynske namme: Scyphozoa) foarmje in klasse fan it tuskenryk fan 'e radiaaldieren (Radiata) en de stamme fan ... Ofbylden dy't by dit ûnderwerp hearre, binne te finen yn de kategory Scyphozoa fan Wikimedia Commons. ...
Collins, A. G.; Jarms, G.; Morandini, A. C. (2021). "World List of Scyphozoa. Cephea cephea (Forskål, 1775)". WoRMS. World ... "Asexual reproduction strategies and blooming potential in Scyphozoa". MEPS. 510. September 9, 2014. Tokioka, T. (1964). " ...
ISBN 978-1-4214-0135-5. ("Lesueur", p. 156). Collins, A. G.; Jarms, G.; Morandini, A. C. (2019). World List of Scyphozoa. ...
Collins, A. G.; Jarms, G.; Morandini, A. C. (2019). World List of Scyphozoa. Phyllorhiza peronlesueuri Goy, 1990. Accessed ...
The Ganigobis Formation provides fossil fish as well as bivalves (e.g. Nuculopsis), gastropods (e.g. Peruvispira), scyphozoa (e ...
Gershwin, Lisa-Ann (2001). "Systematics and Biogeography of the Jellyfish Aurelia labiata (Cnidaria: Scyphozoa)". Biological ... A Functional Biology of Scyphozoa. London: Chapman and Hall. pp. 68-206.. ... Scyphozoa)". Biological Bulletin. 201 (1): 104-119. doi:10.2307/1543531. JSTOR 1543531. PMID 11526069. S2CID 33294412. "WoRMS ... Scyphozoa)". Marine Biology 143 (2): 369-379. doi:10.1007/s00227-003-1070-3. Arai, Mary Needler. ...
Hallopora multitabulata Scyphozoa Climacoconus sp. Rhombifera Glyptocystites sp. Isorophusella sp. Cryptogoleus sp. ...
Arai, M. N. (1997). A Functional Biology of Scyphozoa. London: Chapman and Hall. pp. 68-206. ISBN 978-0-412-45110-2. Rees, W. J ... ISBN 978-0-07-229641-9. He, J; Zheng, L; Zhang, W; Lin, Y (2015). "Life Cycle Reversal in Aurelia sp.1 (Cnidaria, Scyphozoa)". ... Scyphozoa)". Marine Biology. 143 (2): 369-79. doi:10.1007/s00227-003-1070-3. S2CID 189820003. Russell, F. S. (1953). The ... Scyphozoa: Cnidaria) in Saanich Inlet, British Columbia". Marine Biology. 99 (3): 409-414. doi:10.1007/BF02112134. S2CID ...
A Functional Biology of Scyphozoa. London: Chapman and Hall. pp. 68-206. He, Jinru; Zheng, Lianming; Zhang, Wenjing; Lin, ... Scyphozoa)". Marine Biology. 143 (2): 369-379. doi:10.1007/s00227-003-1070-3. Dawson, Mike N; Martin, Laura E. (2001). " ... Scyphozoa)". Marine Biology. 143 (2): 369-379. doi:10.1007/s00227-003-1070-3. Dawson, Michael N. "Aurelia species". Retrieved ... Yuanshao; Steele, Robert E. (21 December 2015). "Life Cycle Reversal in Aurelia sp.1 (Cnidaria, Scyphozoa)". PLOS ONE. 10 (12 ...
"Linuche aquila (Mayer, 1910)". Information system on Scyphozoa, Cubozoa and Staurozoa. Retrieved 26 May 2018. Cleland, John ...
Effects of low salinity on settlement and strobilation of scyphozoa (Cnidaria): Is the lion's mane Cyanea capillata (L.) able ... The Annual Pattern of Feeding, Growth, and Sexual Reproduction in Cyanea (Cnidaria: Scyphozoa) in the Niantic River Estuary, ... World atlas of jellyfish: Scyphozoa except Stauromedusae. Abhandlungen und Verhandlungen des Naturwissenschaftlichen Vereins in ... Scyphozoa), from the northeast Atlantic. Journal of plankton research 36:48-63. Kramp PL. 1961. Synopsis of the medusae of the ...
"Mastigias siderea (Chun, 1896)". Information system of Scyphozoa, Cubozoa and Staurozoa. Retrieved 8 March 2018. CS1 maint: ...
World atlas of jellyfish: Scyphozoa except Stauromedusae. Abhandlungen und Verhandlungen des Naturwissenschaftlichen Vereins in ...
SCYPHOZOA, CNIDARIA) DANS LES AQUARIUMS DU MUSÉE OCÉANOGRAPHIQUE DE MONACO" (PDF). "Information system on scyphozoa, cubozoa, ...
It mostly follows the same life cycle as other members in the class Scyphozoa. It alternates between a polyp form that ... "M.N. Arai, A functional biology of Scyphozoa. xi, 316p. London: Chapman and Hall, 1997. Price £45·00". Journal of the Marine ... This jellyfish is the representative of the family Phacellophoridae in the class of Scyphozoa.This jellyfish was once believed ... Il'inskii, E. N.; Zavolokin, A. V. (September 2011). "The distribution and abundance of scyphomedusae (Scyphozoa) of the family ...
"Mastigias ocellata (Madeer, 1791)". Information system of Scyphozoa, Cubozoa and Staurozoa. Retrieved 8 March 2018. CS1 maint: ...
Pelagic Scyphozoa with a supplement to the first volume on Hydromedusae. Cambridge University Press, Cambridge, p. 284. ... Atolla wyvillei, also known as the Atolla jellyfish or Coronate medusa, is a species of deep-sea crown jellyfish (Scyphozoa: ... Hunt, J.C. & D.J. Lindsay, (1998) Observations on the behavior of Atolla (Scyphozoa: Coronatae) and Nanomia (Hydrozoa: ... Herring, P.J. & E.A. Widder, (2004) Bioluminescence of deep-sea coronate medusae (Cnidaria: Scyphozoa). Marine Biology, 146: pp ...
Scyphozoa, Coronatae)". Marine Biology. 153 (4): 653-659. doi:10.1007/s00227-007-0839-1. PMC 6182610.. ...
Scyphozoa: Rhizostomeae) and the settlement preferences of its larvae were studied using laboratory-based rearing experiments. ... Olmon JE, Webb KL (1974) Metabolism of 131I in relation to strobilation of Aurelia aurita L. (Scyphozoa). J Exp Mar Biol Ecol ... Kramp PL (1970) Zoogeographical studies on Rhizostomeae (Scyphozoa). Vidensk Meddr dansk naturh Foren 133:7-30Google Scholar ... Russell FRS (1970) II Pelagic Scyphozoa with a supplement to the first volume on hydromedusae The medusae of the British isles ...
Jellyfish of the genus Aurelia (Class Scyphozoa) are common bloom-formers in the Gulf of Mexico (GoM). Aurelia have a multi- ... Jellyfish of the genus Aurelia (Class Scyphozoa) are common bloom-formers in the Gulf of Mexico (GoM). Aurelia have a multi- ... Jellyfish of the genus Aurelia (Class Scyphozoa) are common bloom-formers in the Gulf of Mexico (GoM). Aurelia have a multi- ... nov.(Cnidaria, Scyphozoa): a new jellyfish in the Mediterranean Sea. Zootaxa 3794, 455-468. doi: 10.11646/zootaxa.3794.3.7 ...
Hofmann, D. K., Kremer, B. P. (1981). Carbon metabolism and strobilation inCassiopea andromeda (Cnidaria: Scyphozoa): ... Hentschel, J., Hündgen, M. (1980). Morphologie und Ultrastruktur des ScyphistomaAurelia aurita (Scyphozoa, Semaestomae). Zool. ... Bud formation and metamorphosis inCassiopea andromeda (Cnidaria: Scyphozoa): A developmental and ultrastructural study. ... Scyphozoa). (C. andromeda polyps, originally supplied by the Löbbecke Museum and Aquarium Düsseldorf, FRG, were cultured in our ...
Class Scyphozoa. Cnidarians of class Scyphozoa have a predominant jellyfish stage. They are characterized by a cellular ... The Scyphozoa includes the well-known jellyfish. In this group, the polyp stage is far less significant than among the Hydrozoa ... These are the Hydrozoa (hydras and other colony-forming species), the Scyphozoa (jellyfish), and the Anthozoa (sea anemones and ... Scyphozoa (jellyfish), in which the medusa phase is dominant; and Anthozoa (corals and sea anemones), in which medusae are ...
Class Scyphozoa. The class Scyphozoa can be found in the phylum of Cnidaria, the phylum of the "stinging" creatures, such as ... There are approximately 200 species that belong to the class Scyphozoa, and they are the most familiar of the gelatinous ... but they are still structured differently than those organisms of Class Scyphozoa. And, hence, they are not true jellyfish. ... Class Scyphozoa. 2001. 16 October 20 http://www.dnr.sc.gov/marine/pub/seascience/jellyfi.html05 ...
The Scyphozoa is a class of the phylum Cnidaria, sometimes referred to as the "true jellyfish". There are 200 species. The name ... Scyphozoa comes from a Greek word which refers to the cup shape of the jellyfish. ... Retrieved from "https://simple.wikipedia.org/w/index.php?title=Scyphozoa&oldid=5032541" ...
Home » Animals » Animal Galleries » Jellyfish wallpapers - Scyphozoa , Share your photo. Meduse 20120925 Jellyfish. Author ...
The recent bloom of a giant jellyfi sh Nemopilema nomurai has caused a danger to sea bathers and fi shery damages in the waters of China, Korea, and Japan. The present study investigated the cytotoxic and hemolytic activities of crude venom extract of N. nomurai using a number of in vitro assays. The jellyfi sh venom showed a much higher cytotoxic activity in H9C2 heart myoblast than in C2C12 skeletal myoblast (LC50 = 2 µg/mL vs. 12 µg/mL, respectively), suggesting its possible in vivo selective toxicity on cardiac tissue. This result is consistent with our previous fi nding that cardiovascular function is a target of the venom. In order to determine the stability of N. nomurai venom, its cytotoxicity was examined under the various temperature and pH conditions. The activity was relatively well retained at low environmental temperature (≤20 °C) and dramatically lost at high temperature (≥60 °C). In pH stability test, the venom has abruptly lost its activity at low pH environment ...
a b Morandini AC, Marquess AC (2011) Revision of the genus Chrysaora Péron & Lesueur, 1810 (Cnidaria: Scyphozoa). Zootaxa 2464 ...
Until recently, Staurozoa were classified within the Scyphozoa.[22]. There are over 200 species of Scyphozoa, about 50 species ... Scyphozoa are sometimes called true jellyfish, though they are no more truly jellyfish than the others listed here. They have ... The subphylum include the major taxa, Scyphozoa (large jellyfish), Cubozoa (box jellyfish) and Hydrozoa (small jellyfish), and ... in the Scyphozoa, is called a segmenting polyp, or a scyphistoma. Budding produces more scyphistomae and also ephyrae.[22] ...
Thiel, H. (1966). The evolution of Scyphozoa: a review. In W. J. Rees (Ed.), The Cnidaria and their evolution (pp. 77-118). ... Krumbach, T. (1925). Scyphozoa. Handbook of Zoology, 1, 522-686.Google Scholar ...
Domain: Eukaryota • Regnum: Animalia • Phylum: Cnidaria • Classis: Scyphozoa • Ordo: Coronatae • Familia: Paraphyllinidae • ...
Composite of Chandra, HST and Spitzer images. (X-ray data recorded by Chandra appears in blue; infrared light recorded by Spitzer appears in red; Hubbles observations of hydrogen emission appear in orange, and the bluest visible light appears in yellow-green. ...
Scyphozoa. - Only Medusa. Platyhelminthes = Flat Worms. Evolved about 550 million years ago. Bilateral symmetry. Parasitic or ...
Keywords: Scyphozoa; cnidarian envenomations; first aid; hair jelly Scyphozoa; cnidarian envenomations; first aid; hair jelly ...
The Scyphozoa, often referred to as "true jellyfish", are found worldwide and are responsible for the greatest number of ... Generally, envenomations caused by organisms in the class Scyphozoa are less severe than those caused by the Portuguese man-of- ... The subphylum Medusozoa contains five classes: (1) Hydrozoa, (2) Scyphozoa, (3) Cubozoa, (4) Polypodiozoa, and (5) Staurozoa. ...
Polyps of two moon jellyfish species, Aurelia coerulea and A. relicta, from two Adriatic Sea coastal habitats were incubated under multiple combinations of temperature (14, 21°C), salinity (24, 37 ppt) and food regime (9.3, 18.6, 27.9 μg C ind−1 week−1) to comparatively assess how these factors may influence major asexual reproduction processes in the two species. Both species exhibited a shared pattern of budding mode (Directly Budded Polyps: DBP; Stolonal Budded Polyps: SBP), with DBP favoured under low food supply (9.3 μg C ind −1 week−1) and low temperature (14°C), and SBP dominant under high temperature (21°C). However, A. coerulea showed an overall higher productivity than A. relicta, in terms of budding and podocyst production rates. Further, A. coerulea exhibited a wide physiological plasticity across different temperatures and salinities as typical adaptation to ecological features of transitional coastal habitats. This may support the hypothesis that the invasion of A. ...
62-65), Scyphozoa: Semaeostomae (pp. 65-67), and Ctenophora (pp. 79-81). In Marine Invertebrates of the Pacific Northwest (E.N ... Scyphozoa: Scyphomedusae, Stauromedusae, and Cubomedusae. pp. 168-173, with 3 plates. In Light and Smiths Manual: Intertidal ... Additions and corrections to the keys to Hydromedusae, Hydroid polyps, Siphonophora, Stauromedusan Scyphozoa, Actiniaria, and ...
"Scyphozoa". Integrated Taxonomic Information System. Retrieved 23 January 2009. "Anthozoa". Integrated Taxonomic Information ...
An Oral arm is an anatomical structure of "true" sea jellies (or Scyphozoans), which belong to the class Scyphozoa. Oral arms ... "Life History and Ecology" and "More on Morphology." Scyphozoa.. ...
... the Scyphozoa live most of their life cycle as medusa. The class name Scyphozoa means "cup animals," reflective of the dominant ...
Porifera-Hydrozoa, Scyphozoa, Anthozoa, Ctenophora, Echinodermata. 1928. (Die Tierwelt Deutschlands und der angrenzenden ...
Three classes: Hydrozoa (hydra, obelia, 3 stages of life cycle). Scyphozoa (medusa predominates-jellyfish). Anthozoa (polyp ...
Class: Scyphozoa. * Order: Rhizostomeae. *Summary of Invasiveness. * The jellyfish, Phyllorhiza punctata, has been introduced ...
Class: Scyphozoa. Species: Hydroza Tetracyte. Lifespan: 12-18 months. Size: 45-65 cm. The Hydroza Tetracyte (AKA Sunken Medusa ...
Scyphozoa (swimming jellyfish). *Staurozoa (stalked jellyfish). *Cubozoa (box jellies). *Hydrozoa (hydroids and siphonophores). ...
Scyphozoa (swimming jellyfish). *Staurozoa (stalked jellyfish). *Cubozoa (box jellies). *Hydrozoa (hydroids and siphonophores). ...
Cnidaria: Scyphozoa (003). U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries ... New investigations on systematics and evolution of the class Scyphozoa and the phylum Cnidaria. Publ. Seto Mar. Biol. Lab. 20: ... Molecular evidence for cryptic species of Aurelia aurita (Cnidaria, Scyphozoa). Biol. Bull. 200: 92-96. Dawson, M. N., K. ... Deep-sea medusae (Cnidaria: Cubozoa, Hydrozoa and Scyphozoa) from the coast of Bahia (western South Atlantic, Brazil). Mitt. ...
Scyphozoa. Gulf of Mexieo, its origin, waters, and marine life . Fisheries Bulletin, U.S.A. - ... Hidromedusas (Coelenterara: Hydrozoa) y escifomedusas (Coelenterata: Scyphozoa) de la Bahía de la Ascensión, Reserva de Sian ... MORFOLOGÍA, SISTEMÁTICA Y ZOOGEOGRAFÍA DE LAS MEDUSAS (CNIDARIA: HYDROZOA Y SCYPHOZOA) DEL PACIFICO TROPICAL ORIENTAL. ...
Morandini, A.C.; Marques, A.C. 2010: Revision of the genus Chrysaora Péron & Lesueur, 1810 (Cnidaria: Scyphozoa). Zootaxa, 2464 ...
  • Brewer RH, Feingold JS (1991) The effect of temperature on the benthic stages of Cyanea (Cnidaria: Scyphozoa), and their seasonal distribution in the Niantic River estuary, Connecticut. (springer.com)
  • In the Gulf of Mexico (GoM), problematic jellyfish blooms in coastal areas are often caused by medusae of the Class Scyphozoa, Phylum Cnidaria. (frontiersin.org)
  • Asexual reproduction by formation of swimming buds which metamorphose directly into polyps plays a most important role in the propagation of Cassiopea andromeda (Cnidaria: Scyphozoa). (springer.com)
  • Ultrastructure of the neuromuscular system of the polyp of Aurelia aurita L. 1758 (Cnidaria, Scyphozoa). (springer.com)
  • Requirement of exogenous inducers for metamorphosis of axenic larvae and buds of Cassiopea andromeda (Cnidaria: Scyphozoa). (springer.com)
  • The class Scyphozoa can be found in the phylum of Cnidaria, the phylum of the "stinging" creatures, such as jellyfish. (tolweb.org)
  • a b Morandini AC, Marquess AC (2011) Revision of the genus Chrysaora Péron & Lesueur, 1810 (Cnidaria: Scyphozoa). (wikipedia.org)
  • Marques, A.C. 2010: Revision of the genus Chrysaora Péron & Lesueur , 1810 (Cnidaria: Scyphozoa). (wikimedia.org)
  • Phylum Cnidaria, Class Scyphozoa. (enasco.com)
  • Jellyfish belong to the class Scyphozoa within the larger phylum Cnidaria. (amnh.org)
  • Cnidaria: Scyphozoa. (marinespecies.org)
  • Lesh‐Laurie GE and Suchy PE (1991) Cnidaria: Scyphozoa and Cubozoa. (els.net)
  • A preliminary phylogeny of Pelagiidae (Cnidaria, Scyphozoa), with new observations of Chrysaora colorata comb. (berkeley.edu)
  • Some new and previously unrecorded Scyphomedusae (Cnidaria: Scyphozoa) from southern Australian coastal waters. (cmar.csiro.au)
  • These marine invertebrates belong to the class Scyphozoa of the phylum Cnidaria. (muohio.edu)
  • The Phylum Cnidaria ( ("Ny-DARE-eeya") consists of about 10,000 species of "simple" animals found only in marine habitats and includes Class Anthozoa ( corals and sea anemones ), Class Hydrozoa ( hydrozoans ), Subphylum Medusozoa: Class Cubozoa ( box jellyfish ), Class Scyphozoa ( jellyfish ), and Class Staurozoa which contains Order Stauromedusae ( stalked jellyfish ). (marinebio.org)
  • Calder DR (1982) Life history of the Cannonball jellyfish, Stomolophus meleagris L. Agassiz, 1860 (Scyphozoa, Rhizostomida). (springer.com)
  • Jellyfish of the genus Aurelia (Class Scyphozoa) are common bloom-formers in the Gulf of Mexico (GoM). (frontiersin.org)
  • These are the Hydrozoa (hydras and other colony-forming species), the Scyphozoa (jellyfish), and the Anthozoa (sea anemones and corals). (encyclopedia.com)
  • The name Scyphozoa comes from a Greek word which refers to the cup shape of the jellyfish. (wikipedia.org)
  • The Scyphozoa, often referred to as "true jellyfish", are found worldwide and are responsible for the greatest number of jellyfish envenomations in the United States. (medscape.com)
  • Example of the class Scyphozoa would be the Jellyfish. (dscc.edu)
  • A phylum comprising four taxonomic classes: Hydrozoa (hydroids), Cubozoa (sea wasps and box jellies), Scyphozoa (jellyfish), and Anthozoa (corals and sea anemones). (amnh.org)
  • 36. Scyphozoans-cnidarians known ass jellyfish belonging to the class Scyphozoa. (majortests.com)
  • The Mediterranean jellyfish belongs to the class of Scyphozoa . (nmp-zak.org)
  • Scyphozoa spend most of their lives in the medusa stage, while Anthozoa spend most of their lives as polyps. (amnh.org)
  • 1 cm), some species of Hydrozoa and most species of Cubozoa and Scyphozoa are much larger and may attain several centimeters in diameter (HADDAD 2002). (scielo.br)
  • Several free-swimming species of Cubozoa and Scyphozoa possess balance-sensing statocysts , and some have simple eyes. (wikipedia.org)
  • However, failure of these compounds to induce metamorphosis in a coronate suggests this induction mechanism may have been lost in this clade, or is convergent between Scyphozoa and Cubozoa. (bireme.br)
  • There are the cnidarians: the Hydrozoa, Scyphozoa, and Cubozoa. (culanth.org)
  • Medusae are produced through a variety of different developmental mechanisms-in some species polyps bud medusae (Hydrozoa), in others medusae are formed through polyp fission (Scyphozoa), while in others medusae are formed through direct transformation of the polyp (Cubozoa). (bireme.br)
  • Morphologie und Ultrastruktur des Scyphistoma Aurelia aurita (Scyphozoa, Semaestomae). (springer.com)
  • Aurelia labiata medusae (Scyphozoa) in Roscoe Bay avoid tidal dispersion by vertical migration. (springer.com)
  • The life cycle of Lychnorhiza lucerna (Scyphozoa: Rhizostomeae) and the settlement preferences of its larvae were studied using laboratory-based rearing experiments. (springer.com)
  • Calder DR (1973) Laboratory observations on the life history of Rhopilema verrilli (Scyphozoa: Rhizostomeae). (springer.com)
  • Class Scyphozoa Exclusively marine group in which acraspedote medusae predominate. (britannica.com)
  • An Oral arm is an anatomical structure of "true" sea jellies (or Scyphozoans), which belong to the class Scyphozoa. (wikipedia.org)
  • Although many of these animals produce a jelly as part of their life cycle, there are only about 200 species of large jellies that people are likely to notice - most of these are in the class Scyphozoa. (vanaqua.org)
  • There are approximately 200 species that belong to the class Scyphozoa, and they are the most familiar of the gelatinous creatures of our world. (tolweb.org)
  • Staurozoa have recently been recognised as a class in their own right rather than a sub-group of Scyphozoa, and the highly derived parasitic Myxozoa and Polypodiozoa were firmly recognized as cnidarians in 2007. (wikipedia.org)
  • Cargo DG, Rabenold GE (1980) Observations on the asexual reproductive activities of the sessile stages of the sea nettle Chrysaora quinquecirrha (Scyphozoa). (springer.com)
  • By tracing the evolution of aggregating, blooming, and swarming phenotypes, organismal traits, and environmental settings on an up-to-date synoptic phylogeny of classes and orders of Medusozoa, we are able to hypothesize circumstances that enable taxa to occur en masse . (springer.com)
  • Statolith formation and increment in Carybdea rastoni Haacke, 1886 (Scyphozoa: Cubomedusae): evidence of synchronization with semilunar rhythms. (berkeley.edu)
  • Chaetognatha, Euphausiacea , Scyphozoa) were removed so that only benthic invertebrates were included in the sample analysis. (thefreedictionary.com)

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