A genus of STARFISH in the family Asterinidae. They externally hold developing embryos (EMBRYO, NON-MAMMALIAN) among the spines below the oral surface.
Echinoderms having bodies of usually five radially disposed arms coalescing at the center.
A phylum of fungi which have cross-walls or septa in the mycelium. The perfect state is characterized by the formation of a saclike cell (ascus) containing ascospores. Most pathogenic fungi with a known perfect state belong to this phylum.

Fibrous component of the blastocoelic extracellular matrix shapes epithelia in concert with mesenchyme cells in starfish embryos. (1/18)

By using a monoclonal antibody (4H11 Mab), we have investigated morphogenetic functions of a fibrous component of the blastocoelic extracellular matrix in relation to cellular activities during early development of the starfish Asterina pectinifera. The 4H11 fibers fill the blastocoele from the late-cleavage to late-gastrula stage and contain the 370-kDa proteinaceous molecule secreted only by the epithelial cells. When 4H11 Mab is introduced into the blastocoele of blastulae, the embryos reveal three distinct morphological abnormalities after the mid-gastrula stage: (1) Distribution of mesenchyme cells confined near the tip of the archenteron, (2) swelling of the posterior ectoderm, and (3) suppressed growth of the mouth, esophagus, and coelomic pouches. These abnormalities occur together with alterations in the distribution of the 4H11 fibers. In embryos recovering from the effect of 4H11 Mab, the mesenchyme cells rearrange the 4H11 fibers. We propose that 4H11 fibers play direct roles in the morphogenesis of starfish embryos by providing a dynamic scaffold not only for the mesenchyme cells but also for the epithelial cells. Moreover, 4H11 fibers have a resist force from within, in concert with the mesenchyme cells, to counter the bulging force intrinsic to the epithelia and hold the epithelia in specific positions, once the positions have been decided.  (+info)

Centrosome destined to decay in starfish oocytes. (2/18)

In contrast to the somatic cell cycle, duplication of the centrioles does not occur in the second meiotic cycle. Previous studies have revealed that in starfish each of the two centrosomes in fully-grown immature oocytes consists of two centrioles with different destinies: one survives and retains its reproductive capacity, and the other is lost after completion of meiosis. In this study, we investigated whether this heterogeneity of the meiotic centrioles is already determined before the re-initiation of meiosis. We prepared a small fragment of immature oocyte containing the four centrioles and fused it electrically with a mature egg in order to transfer two sets of the premeiotic centrioles into the mature cytoplasm. Two asters were present in this conjugate, and in each of them only a single centriole was detected by electron microscopy. In the first mitosis of the conjugate artificially activated without sperm, two division poles formed, each of which doubled in each subsequent round of mitosis. These results indicate that only two of the four premeiotic centrioles survived in the mature cytoplasm and that they retained their reproductive capacity, which suggests that the heterogeneity of the maternal centrioles is determined well before re-initiation of meiosis, and that some factor in the mature cytoplasm is responsible for suppressing the reproductive capacity of the centrioles destined to decay.  (+info)

Complete mitochondrial genome sequences for Crown-of-thorns starfish Acanthaster planci and Acanthaster brevispinus. (3/18)

BACKGROUND: The crown-of-thorns starfish, Acanthaster planci (L.), has been blamed for coral mortality in a large number of coral reef systems situated in the Indo-Pacific region. Because of its high fecundity and the long duration of the pelagic larval stage, the mechanism of outbreaks may be related to its meta-population dynamics, which should be examined by larval sampling and population genetic analysis. However, A. planci larvae have undistinguished morphological features compared with other asteroid larvae, hence it has been difficult to discriminate A. planci larvae in plankton samples without species-specific markers. Also, no tools are available to reveal the dispersal pathway of A. planci larvae. Therefore the development of highly polymorphic genetic markers has the potential to overcome these difficulties. To obtain genomic information for these purposes, the complete nucleotide sequences of the mitochondrial genome of A. planci and its putative sibling species, A. brevispinus were determined and their characteristics discussed. RESULTS: The complete mtDNA of A. planci and A. brevispinus are 16,234 bp and 16,254 bp in size, respectively. These values fall within the length variation range reported for other metazoan mitochondrial genomes. They contain 13 proteins, 2 rRNA, and 22 tRNA genes and the putative control region in the same order as the asteroid, Asterina pectinifera. The A + T contents of A. planci and A. brevispinus on their L strands that encode the majority of protein-coding genes are 56.3% and 56.4% respectively and are lower than that of A. pectinifera (61.2%). The percent similarity of nucleotide sequences between A. planci and A. brevispinus is found to be highest in the CO2 and CO3 regions (both 90.6%) and lowest in ND2 gene (84.2%) among the 13 protein-coding genes. In the deduced putative amino acid sequences, CO1 is highly conserved (99.2%), and ATP8 apparently evolves faster any of the other protein-coding gene (85.2%). CONCLUSION: The gene arrangement, base composition, codon usage and tRNA structure of A. planci are similar to those of A. brevispinus. However, there are significant variations between A. planci and A. brevispinus. Complete mtDNA sequences are useful for the study of phylogeny, larval detection and population genetics.  (+info)

p90Rsk is required for G1 phase arrest in unfertilized starfish eggs. (4/18)

The cell cycle in oocytes generally arrests at a particular meiotic stage to await fertilization. This arrest occurs at metaphase of meiosis II (meta-II) in frog and mouse, and at G1 phase after completion of meiosis II in starfish. Despite this difference in the arrest phase, both arrests depend on the same Mos-MAPK (mitogen-activated protein kinase) pathway, indicating that the difference relies on particular downstream effectors. Immediately downstream of MAPK, Rsk (p90 ribosomal S6 kinase, p90(Rsk)) is required for the frog meta-II arrest. However, the mouse meta-II arrest challenges this requirement, and no downstream effector has been identified in the starfish G1 arrest. To investigate the downstream effector of MAPK in the starfish G1 arrest, we used a neutralizing antibody against Rsk and a constitutively active form of Rsk. Rsk was activated downstream of the Mos-MAPK pathway during meiosis. In G1 eggs, inhibition of Rsk activity released the arrest and initiated DNA replication without fertilization. Conversely, maintenance of Rsk activity prevented DNA replication following fertilization. In early embryos, injection of Mos activated the MAPK-Rsk pathway, resulting in G1 arrest. Moreover, inhibition of Rsk activity during meiosis I led to parthenogenetic activation without meiosis II. We conclude that immediately downstream of MAPK, Rsk is necessary and sufficient for the starfish G1 arrest. Although CSF (cytostatic factor) was originally defined for meta-II arrest in frog eggs, we propose to distinguish ;G1-CSF' for starfish from ;meta-II-CSF' for frog and mouse. The present study thus reveals a novel role of Rsk for G1-CSF.  (+info)

Adaptations to benthic development: functional morphology of the attachment complex of the brachiolaria larva in the sea star Asterina gibbosa. (5/18)

The asteroid Asterina gibbosa lives all its life in close relation to the sea bottom. Indeed, this sea star possesses an entirely benthic, lecithotrophic development. The embryos adhere to the substratum due to particular properties of their jelly coat, and hatching occurs directly at the brachiolaria stage. Brachiolariae have a hypertrophied, bilobed attachment complex comprising two asymmetrical brachiolar arms and a central adhesive disc. This study aims at describing the ultrastructure of the attachment complex and possible adaptations, at the cellular level, to benthic development. Immediately after hatching, early brachiolariae attach by the arms. All along the anterior side of each arm, the epidermis encloses several cell types, such as secretory cells of two types (A and B), support cells, and sensory cells. Like their equivalents in planktotrophic larvae, type A and B secretory cells are presumably involved in a duo-glandular system in which the former are adhesive and the latter de-adhesive in function. Unlike what is observed in planktotrophic larvae, the sensory cells are unspecialized and presumably not involved in substratum testing. During the larval period, the brachiolar arms progressively increase in size and the adhesive disc becomes more prominent. At the onset of metamorphosis, brachiolariae cement themselves strongly to the substratum with the adhesive disc. The disc contains two main cell types, support cells and secretory cells, the latter being responsible for the cement release. During this metamorphosis, the brachiolar arms regress while post-metamorphic structures grow considerably, especially the tube feet, which take over the role of attachment to the substratum. The end of this period corresponds to the complete regression of the external larval structures, which also coincides with the opening of the mouth. This sequence of stages, each possessing its own adhesive strategy, is common to all asteroid species having a benthic development. In A. gibbosa, morphological adaptations to this mode of development include the hypertrophic growth of the attachment complex, its bilobed shape forming an almost completely adhesive sole, and the regression of the sensory equipment.  (+info)

Increase in multidrug transport activity is associated with oocyte maturation in sea stars. (6/18)

In this study, we report on the presence of efflux transporter activity before oocyte maturation in sea stars and its upregulation after maturation. This activity is similar to the multidrug resistance (MDR) activity mediated by ATP binding cassette (ABC) efflux transporters. In sea star oocytes the efflux activity, as measured by exclusion of calcein-am, increased two-fold 3 h post-maturation. Experiments using specific and non-specific dyes and inhibitors demonstrated that the increase in transporter activity involves an ABCB protein, P-glycoprotein (P-gp), and an ABCC protein similar to the MDR-associated protein (MRP)-like transporters. Western blots using an antibody directed against mammalian P-gp recognized a 45 kDa protein in sea star oocytes that increased in abundance during maturation. An antibody directed against sea urchin ABCC proteins (MRP) recognized three proteins in immature oocytes and two in mature oocytes. Experiments using inhibitors suggest that translation and microtubule function are both required for post-maturation increases in transporter activity. Immunolabeling revealed translocation of stored ABCB proteins to the plasma cell membrane during maturation, and this translocation coincided with increased transport activity. These MDR transporters serve protective roles in oocytes and eggs, as demonstrated by sensitization of the oocytes to the maturation inhibitor, vinblastine, by MRP and PGP-specific transporter inhibitors.  (+info)

Caught in the evolutionary act: precise cis-regulatory basis of difference in the organization of gene networks of sea stars and sea urchins. (7/18)

The regulatory control of otxbeta1/2 in the sea urchin Strongylocentrotus purpuratus and the sea star Asterina miniata provides an exceptional opportunity to determine the genomic basis of evolutionary change in gene regulatory network (GRN) architectures. Network perturbation analyses in both taxa show that Otx regulates the transcription factors gatae and krox/blimp1 and both of these transcription factors also feed back and regulate otx. The otx gene also autoregulates. This three way interaction is an example of a GRN kernel. It has been conserved for 500 million years since these two taxa last shared a common ancestor. Amid this high level of conservation we show here one significant regulatory change. Tbrain is required for correct otxbeta1/2 expression in the sea star but not in the sea urchin. In sea urchin, tbrain is not co-expressed with otxbeta1/2 and instead has an essential role in specification of the embryonic skeleton. Tbrain in these echinoderms is thus a perfect example of an orthologous gene co-opted for entirely different developmental processes. We isolate and test the sea star otxbeta1/2 cis-regulatory module and demonstrate functional binding sites for each of the predicted inputs, including Tbrain. We compare it to the logic processing operating in the sea urchin otxbeta1/2 cis-regulatory module and present an evolutionary scenario of the change in Tbrain dependence. Finally, inter-specific gene transfer experiments confirm this scenario and demonstrate evolution occurring at the level of sequence changes to the cis-regulatory module.  (+info)

Transfer of a large gene regulatory apparatus to a new developmental address in echinoid evolution. (8/18)

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In Asian countries, women are concerned with skin whitening as having whiter skin is often seen to be a superior standard of beauty (25). As a number of women worry about skin pigmentation, effective agents for the improvement of hyperpigmentation have been researched for skin whitening products (26). These foregoing attributes prompted the present hypothesis that a marine natural product might be valuable as a cosmetic component to improve the appearance of hyperpigmentation. We intended in this study to find new whitening materials from A. pectinifera, a marine organism that would also have significance insofar as we would obtain bioactive materials by using starfish which would be discarded after collection from the sea. Therefore, we investigated the potential whitening effect of A. pectinifera extracts (80-MAP, He-AP, EA-AP and En-AP) and also demonstrated the effect of each extract on melanin biosynthesis through tyrosinase activity which is a standard model for assessing regulators of ...
Mah, C. (2010). Asterina cepheus (Müller & Troschel, 1842). In: Mah, C.L. (2017). World Asteroidea database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=213129 on 2017-12- ...
ABSTRACT: The starfish Asterina burtoni is a Lessepsian colonizer which penetrated the Mediterranean Sea from the Red Sea. Populations of A. burtoni are found under rocks and stones in shallow waters along the northern Israeli and southern Lebanese Mediterranean coasts. In the Red Sea, A. burtoni is found in 2 forms, a pentamerous form with 5 equal arms that reproduces sexually, and a pluriradiate form with 3 to 8 arms of unequal length that reproduces both sexually and by fission. In the Mediterranean Sea only the pluriradiate fissiparous form is found. Only male gonads were observed in Mediterranean populations, suggesting reproduction by fission only. It is possible that the successful colonization of the Mediterranean by A. burtoni was mainly due to rapid proliferation by fissiparity. In the present study we used the random amplified polymorphic DNA (RAPD) method to address this question. Genetic diversity was determined within and between different pluriradiate populations from the ...
The order Asterinales comprises a single family, Asterinaceae. In this study, types or specimens of 41 genera of Asterinaceae are re-examined and re-described and illustrated by micrographs. Seventeen genera, namely Asterina (type genus), Asterinella, Asterotexis, Batistinula, Cirsosia, Echidnodella, Halbania, Lembosia, Meliolaster, Parasterinopsis, Platypeltella, Prillieuxina, Schenckiella (=Allothyrium), Trichasterina, Trichopeltospora, Uleothyrium and Vizellopsis, are maintained within Asterinaceae. Echidnodes, Lembosiella, Lembosina, Morenoina, and Thyriopsis are transferred to Aulographaceae based on morphological and molecular characteristics. Anariste is transferred to Micropeltidaceae, while Lembosiopsis is transferred to Mycosphaerellaceae. Placoasterella and Placosoma are morphologically close to taxa in Parmulariaceae, where they are transferred. Aulographina is placed in Teratosphaeriaceae, while Asterodothis, Asterinema, Dothidasteromella, Leveillella, Petrakina and Stephanotheca ...
MASTL (microtubule-associated serine/threonine kinase-like), more commonly known as Greatwall (GWL), has been proposed as a novel cancer therapy target. GWL plays a crucial role in mitotic progression, via its known substrates ENSA/ARPP19, which when phosphorylated inactivate PP2A/B55 phosphatase. When over-expressed in breast cancer, GWL induces oncogenic properties such as transformation and invasiveness. Conversely, down-regulation of GWL selectively sensitises tumour cells to chemotherapy. Here we describe the rst structure of the GWL minimal kinase domain and development of a small-molecule inhibitor GKI-1 (Greatwall Kinase Inhibitor-1). In vitro, GKI-1 inhibits full-length human GWL, and shows cellular e cacy. Treatment of HeLa cells with GKI-1 reduces ENSA/ARPP19 phosphorylation levels, such that they are comparable to those obtained by siRNA depletion of GWL; resulting in a decrease in mitotic events, mitotic arrest/cell death and cytokinesis failure. Furthermore, GKI-1 will be a useful ...
To recover tara cDNAs, relevant λC5 and λC13 genomic fragments were used to probe a cDNA library from 8- to 12-hr embryos (see materials and methods). Among 30 positive clones recovered, insert sizes ranged from 0.9 to 4.3 kb. Restriction mapping and partial sequence analysis indicated that all of the cDNA inserts had similar 3′ extremities, ending in an A-rich region with oligoadenylated tails. However, two classes of 5′ extremities (α and β) were detected among the longest cDNAs. All but one cDNA insert shared a common 5′ region of the β-class and differed only in length. The longest of these β-type inserts, C16, contained a sequence of 4000 bp (Figure 3). The complete sequence of the single α-type clone (C12) was 4316 bp, again in reasonable agreement with a fully polyadenylated mRNA of ~4500 nucleotides (nt) detected by Northern blots. C12 was identical to C16 for most of its length, sharing a long open reading frame of 2724 bp (see Figures 2B and 3). However, C12 and C16 ...
Throughout history the British Atlantic has often been depicted as a series of well-ordered colonial ports that functioned as nodes of Atlantic shipping, where orderliness reflected the effectiveness of the regulatory apparatus constructed to contain Atlantic commerce. Colonial ports were governable places where British vessels, and only British vessels, were to deliver English goods in exchange for colonial produce. Yet behind these sanitized depictions lay another story, one about the porousness of commercial regulation, the informality and persistent illegality of exchanges in the British Empire, and the endurance of a culture of cross-national cooperation in the Atlantic that had been forged in the first decades of European settlement and still resonated a century later.. In Empire at the Periphery, Christian J. Koot examines the networks that connected British settlers in New York and the Caribbean and Dutch traders in the Netherlands and in the Dutch colonies in North America and the ...
If you are talking about the current thread with the boost in old drugs as one example, Ill tell you, and I know this because my husband works directly with industry regulations, that the situation in question was created by the government regulatory apparatus. In their effort to create the safe drug environment demanded by consumers (and petty bureaucrats looking to justify their own desk jobs), they created the set of drug validation rules being used by the companies in question ...
Theoretical foundations and a global overview of the known protein structures; induced conformational changes upon protein-protein association; regulatory apparatus of pp60c-Src protein; protein dynamics and NMR relaxation; structure, dynamics and func
How cells coordinate growth and division is key for size homeostasis. Phosphorylation by G1-CDK of Whi5/Rb inhibitors of SBF/E2F transcription factors triggers irreversible S-phase entry in yeast and metazoans, but why this occurs at a given cell size is not fully understood. We show that the yeast Rim15-Igo1,2 pathway, orthologous to Gwl-Arpp19/ENSA, is up-regulated in early G1 and helps promoting START by preventing PP2ACdc55 to dephosphorylate Whi5. RIM15 overexpression lowers cell size while IGO1,2 deletion delays START in cells with low CDK activity. Deletion of WHI5, CDC55 and ectopic CLN2 expression suppress the START delay of igo1,2 cells. Rim15 activity increases after cells switch from fermentation to respiration, where Igo1,2 contribute to chromosome maintenance. Interestingly Cln3-Cdk1 also inhibits Rim15 activity, which enables homeostatic control of Whi5 phosphorylation and cell cycle entry. We propose that Rim15/Gwl regulation of PP2A plays a hitherto unappreciated role in cell ...
We are investigating how mammalian cells process information about intra- and extracellular cues through their intra-cellular signalling and gene-regulatory networks, how these networks dysfunction in disease and how these networks can be modulated by drugs. We are an interdisciplinary team of experimentalists and theoreticians and utilise mathematical models and theoretical concepts as well as quantitative and high throuput experimental approaches to analyse signalling and gene expression. ...
We are investigating how mammalian cells process information about intra- and extracellular cues through their intra-cellular signalling and gene-regulatory networks, how these networks dysfunction in disease and how these networks can be modulated by drugs. We are an interdisciplinary team of experimentalists and theoreticians and utilise mathematical models and theoretical concepts as well as quantitative and high throuput experimental approaches to analyse signalling and gene expression. ...
Video articles in JoVE about genetic processes include A Method for Microinjection of Patiria minata Zygotes, Nuclear Transfer into Mouse Oocytes, Genomic MRI - a Public Resource for Studying Sequence Patterns within Genomic DNA, Genetic Crosses.
The crustose coralline alga Lithothamnium pseudosorum induces high rates of settlement and metamorphosis of larvae of the coral-eating crown-of-thorns starfish (Acanthaster planci). In cases where crustose coralline algae (CCA) induce metamorphosis of marine invertebrate larvae it is normally assumed that the inductive molecules are produced by the alga, but an alternative is that they originate from bacteria on the plant surface. Bioassays using shards of L. pseudosorum treated with several antibiotics, whereby some shards were reinfected with bacteria from the alga, showed that if bacteria populations are depleted then settlement and metamorphosis of larvae of A. planci are inhibited. This demonstrates that bacteria are necessary for induction and suggests that morphogenic substances are produced by bacteria on the surface of the alga and not directly by the alga itself. However, surface bacteria are not inductive if they are isolated from soluble algal compounds, suggesting either that they ...
Despite the presence of numerous sharp poisonous spines, adult crown-of-thorns starfish (CoTS) are vulnerable to predation, though the importance and rates of predation are generally unknown. This study explores variation in the incidence and severity of injuries for Acanthaster cf. solaris from Australias Great Barrier Reef. The major cause of such injuries is presumed to be sub-lethal predation such that the incidence of injuries may provide a proxy for overall predation and mortality rates. A total of 3846 Acanthaster cf. solaris were sampled across 19 reefs, of which 1955 (50.83%) were injured. Both the incidence and severity of injuries decreased with increasing body size. For small CoTS (<125 mm total diameter) >60% of individuals had injuries, and a mean 20.7% of arms (±2.9 SE) were affected. By comparison, <30% of large (>450 mm total diameter) CoTS had injuries, and, among those, only 8.3% of arms (±1.7 SE) were injured. The incidence of injuries varied greatly among reefs but
Outbreaks of the destructive coral-eating crown-of-thorns starfish, Acanthaster planci, present a considerable threat to coral reefs worldwide, and mitigat
Full paper, video, gifs and still images available. Details below. Dr Frederieke Kroon looking at a crown-of-thorns starfish on the Great Barrier Reef. Credit: D.Westcott/CSIRO Crown-of-thorns starfish are on the menu for many more fish species than previously suspected, an investigation using fish poo and gut goo reve
A sea stars anus is in the center of the top side, or the aboral surface of the animal. A circular madreporite is located just off center on the aboral surface, and this madreporite is a critical part of the circulation system of the sea star. Instead of a circulatory system, a sea star has a water vascular system, and the madreporite acts as a trap door through which water can move in and out in a controlled manner. The mouth of a sea star is located in the center of its underneath or oral surface. Open furrows containing tube feet extend from the mouth along the length of each leg.. Sea stars do not have eyes, but they have eyespots that can detect light at the tip of each arm. Interestingly, scientific studies have shown some species of sea stars move toward light while others move away from the light. Neurosensory cells which are sensitive to both touch and chemical tastes cover the surface of a sea star and are particularly dense in the suckers of the tube feet. Many species of sea stars ...
TY - JOUR. T1 - Mesenchyme cells can function to induce epithelial cell proliferation in starfish embryos. AU - Hamanaka, Gen. AU - Matsumoto, Midori. AU - Imoto, Masaya. AU - Kaneko, Hiroyuki. PY - 2010/3. Y1 - 2010/3. N2 - Here, we show that mesenchyme cells have a novel morphogenetic function in epithelial cell proliferation in starfish embryos. Blastula embryos were injected with pure populations of mesenchyme cells and the total cell numbers in the treated embryos were subsequently determined at different developmental stages. When a total of 40-50 mesenchyme cells was injected, total cells numbers in mid-gastrula embryos and 3-day-old bipinnaria larvae increased significantly (by 1.3-fold) compared with controls, with no indication of any mitotic activity in the injected mesenchyme cells. However, injection of more than 150 mesenchyme cells failed to induce proliferation of the epithelial cells and, moreover, interfered with normal morphogenesis. These developmental abnormalities occurred ...
Minimum depth from Ref. 81548. Cryptic on coral areas and reef patches (Ref. 78188). On a reef slope (Ref. 97449). Feeds on hard corals, soft corals, encrusting organisms, algae, gorgonians and cannibalistic on other Acanthaster planci (Ref. 78188). Life cycle: Eggs hatch into planktonic larvae, grow into algal and coral feeding juveniles, and later into fully grown adults (Ref. 83567). Also Ref. 113703. Spawning period in the Southern Hemisphere is from November to January while in the Northern Hemisphere, May to August. Spawning duration is about 30 minutes. Aggregation and synchronization during spawning is triggered by pheromone but is only effective over short distances (Ref. 78188). ...
Scientists have taken a major step towards understanding how and why deadly plagues of coral-eating crown-of-thorns seastar (COTS) break out across the Great Barrier Reef, thanks to novel research...
Although a great deal is known about molecular motors that drive movement of the eukaryotic flagellum, little is known about mechanisms that regulate/coordinate flagellar beat (Cosson, 1996). Our results demonstrate that trypanin is required for directional cell motility in T. brucei. EM studies revealed that the unusual cell motility defect of trypanin(−) mutants results from uncoupling of the flagellar apparatus from the subpellicular cytoskeleton. The punctate distribution of trypanin along the cell body side of the paraflagellar rod (Fig. 5) supports the interpretation that trypanin is part of the attachment complex that connects the flagellum to the subpellicular cytoskeleton. Our data further indicate that this flagellum attachment complex has two components, a cytoskeletal component, of which trypanin is a part, and a membrane component that operates even in the absence of trypanin and stabilizes the direct cytoskeleton connection (Balber, 1990; Hemphill et al., 1991). The only other ...
A new video from Oregon Sea Grant (OSG), Sea Star Health: Using Blood Work to Identify Sick Sea Stars, reveals how OSG and Oregon State University created the first-ever blood panel for ochre sea stars to use as a baseline for detecting sick ones. The tool could help aquarists treat them before they succumb to Sea Star Wasting Syndrome, which causes their limbs to fall off.. The cause of the syndrome, which was first seen in the Pacific Northwest in 2013, is unknown. OSU veterinary student Heather Renee Srch-Thaden created the blood panel under the guidance of Dr. Tim Miller-Morgan, an aquatic veterinarian with OSG Extension, and Dr. Susan Tornquist, dean of OSUs College of Veterinary Medicine.. The video was filmed at OSUs Hatfield Marine Science Center in Newport, where the public can touch and learn about sea stars in a tidepool exhibit at the HMSC Visitor Center. It was filmed and edited by OSG videographer Vanessa Cholewczynski, with photos by Tim Miller-Morgan and Heather Renee ...
Staff scientist Dana Murray reports on a mysterious disease hitting West Coast tidal zones:. Missing limbs … melting masses of flesh … gooey lesions overtaking the entire body.. No, its not the stuff of a sci-fi horror movie. Rather, its a troubling series of misfortunes befalling sea stars along the Pacific coast of North America. This winter, divers and tidepoolers are encountering numerous sea stars with white lesions that eventually decompose body tissue into a goo-like blob.. These keystone predators are victims of sea star wasting disease, a fast-moving infectious disease that has occurred along our coast for decades, but not at the recent widespread level. Reports of disintegrating sea stars have come from as far north as Anchorage, Alaska, to our shores along Palos Verdes, and down south to La Jolla.. Scientists first described the symptoms in 1978, and several outbreaks have occurred since. Warmer water temperatures led to massive sea star die-offs in Southern California in ...
The researchers identified proteins that the starfish emit when aggregating to reproduce, and could be used to create synthetic chemicals to help capture and eradicate the pest.
National Geographic, Sep 15, 2015: The massacre of sea stars along the West Coast continues, although the pace has slowed because so many already have died… Some areas have seen up to a 90 percent decline in their populations… Scientists [are] investigating why this disease… is now rampaging through 19 species of sea stars… In some of the locations hit early on with this wasting disease, [Pete Raimondi, a marine ecologist at the University of California, Santa Cruz] and colleagues are already starting to see a shift in the animal community. In tidepools, where there used to be a mix of organisms including sea stars, scientists are now seeing mussels dominating… in the Pacific Northwest, sea stars have either gotten smaller in body size, or they are big, with few in the mid-size range, says Drew Harvell, a marine ecologist at Cornell University.. National Geographic transcript, Sep 15, 2015: Ben Miner, marine biologist at Western Washington Univ.: From Mexico all the way to Alaska, ...
The fallout is important and widespread. Stock successful TAL Education (ticker: TAL) is down 54% successful premarket trading. New Oriental Education & Technology (EDU) banal is disconnected 48%. Shares of Gaotu Techedu (GOTU) person dropped 59% and shares of 17 Education & Technology (YQ) is down astir 40%. The losses are huge. S&P 500 and Dow Jones Industrial Average futures, for comparison, are some up Friday morning. The Friday banal massacre is different illustration of the Chinese regulatory apparatus vexing overseas investors. Didi Global (DIDI) shares are down to $9.19, from a station IPO highest of $18.01, deed connected June 30, aft Chinese authorities removed the ride-hailing app from stores. Looking a small farther back, Jack Ma s ANT Financial scrubbed its IPO due to the fact that of run-ins with Chinese regulators. The communal taxable with each these stocks are they are U.S. listed. Investors present person to wonderment is immoderate Chinese banal with its superior listing ...
In nuclear industry parlance the gold standard has special significance and there is real concern the world may slip below that standard as the U.S. industry falters.. Gold standard is the term applied globally to the U.S. regulation and licensing of nuclear power plants. It is a term of respect for American standards of excellence. It was widely used at a meeting of the Nuclear Infrastructure Council in Washington Tuesday and Wednesday; and surprisingly, coming from French and Chinese lips, was an affirmation of the whole licensing and regulatory apparatus that exists in the United States.. The fear is that as the United States lags in the construction of reactors and while it continues to eschew fuel reprocessing, the gold standard will lose its luster to a world that is building new nuclear at breakneck speed and is, or plans, to reprocess the used fuel.. Most of todays concern is about China, now committed to the fastest growth in nuclear. But India is also building and others like the ...
Shown above, is Acanthaster planci-the infamous Crown-of-Thorns starfish which attacks and devours primarily shallow-water tropical hard coral (i.e., scleractinian). While the above species has grown to plague proportions-it is an important member of the coral-reef ecosystem. As it is likely these deep-sea corallivores are ALSO likely to be... So, how did this whole process begin? As with many things...it started with me identifying a starfish... ...
Shown above, is Acanthaster planci-the infamous Crown-of-Thorns starfish which attacks and devours primarily shallow-water tropical hard coral (i.e., scleractinian). While the above species has grown to plague proportions-it is an important member of the coral-reef ecosystem. As it is likely these deep-sea corallivores are ALSO likely to be... So, how did this whole process begin? As with many things...it started with me identifying a starfish... ...
Stock Photo of Northern Pacific Sea Star tubed feet. High Quality Northern Pacific Sea Star Images and Gloss Prints are available from Oceanwide Images Stock Photo Library.
The name momiji is short for momiji-hitode or momoji-gai. As you know, hitode is the most common use of the Japanese word to indicate sea stars. The word gai or kai means shellfish in Japanese. Our remote ancestors considered that the sea star was one of the groups of seashells. The Japanese common names of sea stars have hitode in most of the species, or momiji in some groups. For example, we can see the word momiji in some astropectinid sea stars and goniasterid sea stars such as Pseudarchaster parelii (aka-momiji: red sea star ...
Sea Star House, Ao Nang from 37 $ (22.Mar) Instant hotel booking. Sea Star House is indeed a pleasant and relaxing place to enjoy your holiday. You can be assured of a warm welcome and excellent service from the frie...
During the late 1960s and 1970s, massive herds of poisonous crown-of-thorns starfish suddenly began to infest coral reef communities around the world, leaving in their wake devastation comparable to a burnt-out rainforest.
There was a man who was walking along a sandy beach where thousands of sea stars had been washed up on the shore. He noticed a boy picking the sea star one by one and throwing them back into the ocean. The man observed the boy for a few minutes and then asked what he was doing. The boy replied that the sun was up and the tide was going out. Thus he was returning the sea star to the sea, otherwise they would die. The man asked how saving a few, when so many were doomed would make any difference whatsover? The boy picked up a sea star and threw it back into the ocean and said, it made a difference to that one. The man left the boy and went home, deep in thought about what the boy had said. He soon returned to the beach and spent the rest of the day helping the boy throw sea star into the sea. ~ Loren Eiseley ...
A yellow elastic fibrous mucoprotein that is the major protein of elastic structures such as blood vessels. (2) A protein found with collagen in the dermis that is responsible for giving structure to your skin and organs. Protein similar in structure to collagen and is chief constituent of elastic fibers embedded in extracellular matrix. The fibrous components form an elastic network to uniformly maintain the resilience and elastic properties to local tissue requirements. ...
This invention includes malleable, biodegradable, fibrous compositions for application to a tissue site in order to promote or facilitate new tissue growth. One aspect of this invention is a fibrous component that provides unique mechanical and physical properties. The invention may be created by providing a vessel containing a slurry, said slurry comprising a plurality of natural or synthetic polymer fibers and at least one suspension fluid, wherein the polymer fibers are substantially evenly dispersed and randomly oriented throughout the volume of the suspension fluid; applying a force, e.g., centrifugal, to said vessel containing said slurry, whereupon said force serves to cause said polymer fibers to migrate through the suspension fluid and amass at a furthest extent of the vessel, forming a polymer material, with said polymer material comprising polymer fibers of sufficient length and sufficiently viscous, interlaced, or interlocked to retard dissociation of said polymer fibers.
The present invention is directed to an essentially binder free cleaning and/or sanitizing nonwoven article including a cationic fibrous component for cleaning a surface, to be utilized with a sanitizing solution without depleting the solutions effectiveness. The cationic cleaning or sanitizing article of the present invention is particularly engineered to be stored in a quaternary amine sanitizing solution over an extended period of time while maintaining at least the minimum required FDA ppm of the sanitizing solution.
The anaerobic biodigestion process occurs as a result of the action of different microorganisms on organic matter, which transforms complex organic substances into more simple molecules, stabilizing the organic matter and producing biofertilizer and biogas (Amorim et al., 2004). Many factors can affect this process, including the composition of the substrate to be digested, which is closely related to the diets fed to animals. The mineral and nitrogen contents and the different types of carbohydrates in the diets affect the amount and quality of feces produced, and can therefore alter biogas production (Orrico et al., 2007).. Considering the carbohydrates present in diets fed to pigs, starch is totally digested in the pigs small and large intestine, whereas the fibrous component of the feedstuffs is partially degraded in the large intestine, and the portion not completely digested is, most likely, excreted (Wang et al., 2002). In phase 3 diets of this research, the calculated values of total ...
Buy Biorb Sea Star to add color to your Biorb fish tank for a colorful decoration. Or shop for other Biorb decorations and products from the largest Biorb and Biube supplier in the U.S.
Cancer cells are immature cells resulting from cellular reprogramming by gene misregulation, and redifferentiation is expected to reduce malignancy. It is unclear, however, whether cancer cells can undergo terminal differentiation. Here, we show that inhibition of the epigenetic modification enzyme enhancer of zeste homolog 2 (EZH2), histone deacetylases 1 and 3 (HDAC1 and -3), lysine demethylase 1A (LSD1), or DNA methyltransferase 1 (DNMT1), which all promote cancer development and progression, leads to postmitotic neuron-like differentiation with loss of malignant features in distinct solid cancer cell lines. The regulatory effect of these enzymes in neuronal differentiation resided in their intrinsic activity in embryonic neural precursor/progenitor cells. We further found that a major part of pan-cancer-promoting genes and the signal transducers of the pan-cancer-promoting signaling pathways, including the epithelial-to-mesenchymal transition (EMT) mesenchymal marker genes, display neural ...
Visos teisės saugomos. © 2009 Macrogamta.lt . Kopijuoti, dauginti, platinti šios svetainės turinį be macrogamta.lt raštiško sutikimo yra draudžiama.. ...
By Jay T. Cullen Note that the video above was shot on May 8, 2015, set to Debussys Clair de Lune, by the YouTube user NorthOlbo who makes wonderful pieces about the British Columbian coast. Check him out. The purpose of this more visual post is to report on a recent trip my students and…
The Red Knob Star, Echinaster echinophorus, also known as the Red Thorny Sea Star, has a thick grey body with red tubercles (knobs) going up each of its 5 arms. This star requires a large aquariu
Daug paprasčiau uiti, žeminti ir įžeidinėti kolegą, pavaldinį, kai to nedraudžia šalies įstatymai. Nuolatinį žeminimą Lietuvoje patiria ne tik dirbantys privačiuose, bet ir valstybiniuose sektoriuose. Tačiau užkirsti kelią valstybinėje įstaigoje kaip savo namuose besielgiančiam viršesniam valdininkui - tiesioginių teisinių priemonių nėra. Apie mobingą, kitai psichologinį ar net fizinė terorą kalbamės su docente dr. Jolita Vveinhard.
Daug paprasčiau uiti, žeminti ir įžeidinėti kolegą, pavaldinį, kai to nedraudžia šalies įstatymai. Nuolatinį žeminimą Lietuvoje patiria ne tik dirbantys privačiuose, bet ir valstybiniuose sektoriuose. Tačiau užkirsti kelią valstybinėje įstaigoje kaip savo namuose besielgiančiam viršesniam valdininkui - tiesioginių teisinių priemonių nėra. Apie mobingą, kitai psichologinį ar net fizinė terorą kalbamės su docente dr. Jolita Vveinhard.
As part of the Starfish community, you can benefit from our years of experience and industry knowledge. We meticulously select products to give you confidence in the items you purchase from us. Have access to our network of professionals as well as our helpful in store and online team who will be there to assist you every step of the way. ...
Key employees are sensitive barometers of future organizational health. Starfish play the same role in our oceans. Can we learn from them?
A starfish makes a good pet if the owner is willing to spend enough time attending to its needs. This type of marine animal typically needs more care and maintenance than the average aquarium...
BLUFFTON (AP) - A father wearing his sons baseball cap and classmates with shirts bearing pictures of a fallen friend were among those who gathered Monday night to remember five college baseball players killed in a bus wreck. Players who survived carried candles, lighting one for each of their Bluffton University teammates who died in Atlanta along with their bus driver and his wife.. The Bluffton Beavers baseball team was headed to Sarasota, Florida, on March 2nd to play in a double header with Eastern Mennonite University. Then they were headed to Fort Myers to participate in the Gene Cusic Classic tournament. Atlanta Police spokesman Joe Cobb said the driver apparently mistook an exit lane for part of a carpool lane, and drove up the ramp until he hit an intersection. The bus went off the overpass, and tumbled over a fence and guard rail, landing on its left side.. Hundreds of people packed Founders Hall on the Bluffton University campus for the memorial service, and an overflow audience ...
... may refer to: Asterina (starfish), a starfish genus in the family Asterinidae Asterina (fungus), a fungus genus in the ...
... is a species of fungus in the family Asterinaceae, first described by Marie Leonore Farr in 1987. It has ... "Asterina stipitipodia M.L.Farr, 1987". www.gbif.org. Retrieved 19 January 2022.{{cite web}}: CS1 maint: url-status (link) M. L ...
... is one of thirty species of small bat star in the genus Asterina. It is mainly found on the east coast of ... Asterina stellifera feeds on macroalgae, bryozoans, tunicates, polyps, and biofilm as well as different types of kelp. Asterina ... Asterina stellifera was also used to explore the structure of the mucous granules in the tube feet of sea stars. It was found ... This explains why Asterina can be found living with less than five arms. Asterian sea stars also reproduce through dispersal of ...
Asterina adeniicola Asterina advenula Asterina aglaiae Asterina alchorneae Asterina alchorneicola Asterina aporosae Asterina ... Asterina blanda Asterina buettneriae Asterina bullata Asterina cannonii Asterina canthii-dicocci Asterina canthiigena Asterina ... Asterina delitescens Asterina deviata Asterina dhivaharanii Asterina dilabens Asterina dinghuensis Asterina ditissima Asterina ... Asterina glyptopetali Asterina guaranitica Asterina gymnemae Asterina hainanensis Asterina hederae Asterina himantia Asterina ...
... , habitas.org.uk, accessed 31 August 2008 Barnes, Morvan (200). "Asterina phylactica". Marine Life ... The species was formally described in 1979 and is very similar to Asterina gibbosa. Asterina phylactica is a pentagonal ... Asterina phylactica feeds on the film of bacteria and diatoms that exists on the surface of rocks. To do this it everts its ... Asterina phylactica is a species of sea star. It can be found in geographically widespread sites around the British Isles and ...
... may live for six years or more. The eggs of Asterina gibbosa are laid in a mass and glued to the substrate by ... Asterina gibbosa is a protandric hermaphrodite. This means that it is born a male and later changes sex and becomes a female. ... Asterina gibbosa, commonly known as the starlet cushion star, is a species of starfish in the family Asterinidae. It is native ... Asterina gibbosa is a pentagonal starfish with short blunt arms and an inflated appearance. The aboral (upper) surface is ...
... is a species of agaric fungus in the family Mycenaceae. It is found in São Paulo state, Brazil, where it grows ... Mycena asterina in Index Fungorum v t e (Articles with short description, Short description matches Wikidata, Articles with ' ...
... is a species of pentagonal starfish in the family Asterinidae. The holotype was collected at Cape Agulhas, ... Mah, C.L. (2021). "Asterina hoensonae O'Loughlin, 2009". WoRMS. World Register of Marine Species. Retrieved 2 December 2021. v ...
... , commonly known as the seagrass asterina, is a species of starfish in the family Asterinidae. It is native to ... Asterina pancerii appears to be a rare species, but this may be because it is seldom noticed because of its small size and ... Asterina pancerii is a very small starfish, seldom exceeding 1 cm (0.4 in) in diameter. It is pentagonal with five short, broad ... Asterina pancerii is endemic to the Mediterranean Sea. It is most common on the Mediterranean coasts of Spain, France and Italy ...
Asterina fimbriata Perrier, 1875 Asterina gibbosa (Pennant, 1777) Asterina gracilispina Clark, 1923 Asterina hoensonae ... 2018 Asterina pancerii (Gasco, 1876) Asterina phylactica Emson & Crump, 1979 Asterina pusilla Perrier, 1875 Asterina pygmaea ... 1875 Asterina stellaris Perrier, 1875 Asterina stellifera (Möbius, 1859) Asterina stellifera obtusa Leipoldt, 1895 Asterina ... O'Loughlin, 2009 Asterina krausii Gray, 1840 Asterina lorioli Kœhler, 1910 Asterina martinbarriosi López-Márquez, Acevedo, ...
"Asterina miniata". www.wallawalla.edu. Archived from the original on 23 May 2010. Retrieved 22 November 2009. "Bat star, Kelp ... "Bat Star: Asterina miniata". northislandexplorer.com. Archived from the original on 21 November 2009. Retrieved 22 November ... The genus of this species has transitioned back and forth between Asterina and Patiria since its inclusion in Fisher's 1911 ... However, recent revisions based on molecular systematics have constrained Asterina and identified Patiria as a complex of three ...
Asterina, Lev., has two-celled hyaline spores (Hyalodidymae). Asterella, Sacc, has two-celled brown spores (Phaeodidymae). ...
Asterina ellisii Sacc. & P. Syd. 1899 Atractobolus ellisiella (Rehm) Kuntze 1898 Bactridium ellisii Berk. 1874 Bipolaris ...
Y. Achituv (1969). "Studies on the Reproduction and Distribution of Asterina burtoni Gray 1840 and Asterina wega Perrier 1869 ( ... A second species was named Asterina wega and this name was used to describe a separate multi armed form which reproduced by ... Aquilonastra burtoni was originally named Asterina burtoni by John Edward Gray from specimens collected by a Mr John Burton in ... Yair Achituv; E. Sher (1991). "Sexual Reproduction and Fission in the Sea Star Asterina Burtoni from the Mediterranean Coast of ...
1905 Asterina clausenicola Doidge 1920 Asterina combreti Syd. & P. Syd. 1910 Asterina combreti var. kutuensis v. Hohn* Asterina ... Cooke 1880 Asterina crotonicola Doidge 1922 Asterina crotoniensis R.W. Ryan 1939 Asterina delicata Doidge 1920 Asterina ... Cooke 1880 Asterina myriadea Cooke 1882 Asterina natalensis Doidge 1920 Asterina natalitia Doidge 1942 Asterina nodosa Doidge ... 1938 Asterina balansae var. africana Theiss.* Asterina bosmanae Doidge 1942 Asterina bottomleyae Doidge 1942 Asterina capensis ...
1910 accepted as Asterina Lév., (1845) Englerulaster gymnosporiae (Henn.) Theiss. 1918 accepted as Englera gymnosporiae (Henn ...
Goos (1996) = Asterina lepianthis A. meliosmae I. Hino & Katum. (1961) = Asterostomella tosaensis A. meliosmicola Hosag., M.P. ... 1910) = Asterina solanicola Asterinaceae A. epiphylla var. gallica Bourdot & Galzin (1911) = Asterostomella epiphylla A. ... Goos (1996) = Asterostomella meliosmigena A. veronicae G. Arnaud (1918) = Asterina veronicae Lumbsch TH, Huhndorf SM. (December ... which is similar to Asterina. After Speg. had formed the genus in 1886. Several later authors added new species to ...
1920) = Asterina elaeagni A. flexuosa (G. Winter) Theiss. (1912) = Prillieuxina flexuosa A. gmelinae (Sacc.) Trotter (1926) = ... 1914) = Asterina ramuligera A. rhaphiostylidis S. Hughes (1953) = Prillieuxina rhaphiostylidis A. saginata Syd. & P. Syd. (1917 ... 1912) = Asterina sublibera A. systema-solare (Massee) Theiss. (1912) = Dothidasteromella systema-solare A. tetracerae Hansf. ( ... 1912) = Prillieuxina winteriana A. woodiana Doidge (1920) = Asterina woodiana' Lumbsch TH, Huhndorf SM. (December 2007). " ...
1885) = Asterina guaranitica Asterinaceae S. humiriae Henn. (1905) = Prillieuxina humiriae Asterinaceae S. ilicina Syd. & P. ... 1904) = Asterina marmellensis Asterinaceae S. megas var. macrospora Starbäck (1904) = Seynesia megas S. melastomataceae Henn. ( ... 1885) = Asterina balansae Asterinaceae S. brachystoma Rehm (1898) = Parasterina brachystoma Asterinaceae S. brasiliensis Speg ... 1904) = Asterina submegas Asterinaceae Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia ...
Isipinga Doidge 1921 accepted as Asterina Lév., (1845) Isipinga areolata Doidge 1921 accepted as Symphaster areolata (Doidge) ...
1897) - Note on some new species of the genus Asterina. The standard author abbreviation Gaillard is used to indicate this ... Note sur quelques espéces nouvelles du genre Asterina. Bulletin de la Société Mycologique de France 13: 179-181. ( ...
In literature, this species is often referred to Asterina pectinifera; the accepted name is now Patiria pectinifera. Patiria ... Davydov, P. V.; Shubravyi, O. I.; Vassetzky, S. G. (1990). "The starfish Asterina pectinifera (Müller et Troschel, 1842)". ... Asterina pectinifera" (PDF). Journal of Embryology and Experimental Morphology. 94: 47-60. PMID 3760763. Mita, Masatoshi (25 ... "Effects of sediment type and food abundance on the vertical distribution of the starfish Asterina pectinifera" (PDF). Marine ...
Boedijnopeziza S.Ito & S.Imai (1937) Asterina boedijniana Hansf. (1954) Ceramothyrium boedijnii Bat., Nascim. & Cif. (1962) ...
Asterina pectinifera, used as a model organism for this purpose, is resilient and easy to breed and maintain in the laboratory ... Crump, R. G.; Emson, R. H. (1983). "The natural history, life history and ecology of the two British species of Asterina" (PDF ... Protandrous individuals of species like Asterina gibbosa start life as males before changing sex into females as they grow ... Achituv, Y.; Sher, E. (1991). "Sexual reproduction and fission in the sea star Asterina burtoni from the Mediterranean coast of ...
Asterina quarta, Asterinaceae P. ramuligera (Syd. & P. Syd.) R.W. Ryan (1939) = Asterina ramuligera, Asterinaceae P. santiriae ... Asterina woodiana, Asterinaceae Lumbsch TH, Huhndorf SM. (December 2007). "Outline of Ascomycota - 2007". Myconet. Chicago, USA ... Asterina antioquensis, Asterinaceae P. burchelliae (Doidge) R.W. Ryan (1939) = Asterolibertia burchelliae, Asterinaceae P. ...
Recent analyses suggest Paxillosida may be a sister taxon of Asterina. The order is divided into these families: family ...
A new species and four new records of Asterina from Kenya. Nova Hedwigia 62: 147-150. Mibey, R.K.; J.O. Kokwaro & D.M. Mukunya ...
Bat stars (Asterina miniatus) are the most prevalent predators of eggs. Fish do not eat them, although they will nip at eggs ...
Most common being Asterina, Asterinella, Diplotheca, Glomerella, Gnomonia, Schizothyrium, Placosphaeria, and Stigmea. Black ...
Angle, VisitPembrokeshire.com, accessed 30 August 2008 Asterina phylactica, habitas.org.uk, accessed 31 August 2008 BBC Wales ... the rock pools are home to a small green starfish called Asterina phylactica. The starfish was only formally identified in 1979 ...
Asterina stellaris Perrier, 1875. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia. ...
Identifying Features. The Bat Star generally has five stubby arms, but has been found with as little as four and as many as nine, which stem out of its wide central disk. These arms are connected by webbing, giving them their bat-like appearance. They come in a wide range of solid and mottled colours including brown, yellow, red, orange, purple, gray, and green. Its ossicles-plates on the surface of the star- are large and distinct, giving the appearance of rough shingles.. Habitat. The Bat Star is found intertidally to 951ft deep off the coasts of Alaska to California in rocky areas covered with algae or surf grass, and among kelp forests, sponges, and bryozoans.. Food The Bat Star is omnivorous, scavenging on dead or living animals and plants including seaweed, sponges, sea urchins, chitons, barnacles, snails, limpets, sea anemones, and squid eggs. It finds its prey with the help of light sensors on the end of each arm, and consumes its prey by enveloping it with its stomach and secreting ...
Tour. Just the mention of the word might conjure up visions of a guide with an umbrella droning on to a large group of disinterested tourists as they traipse round ...
Asterina gibbosa (A cushion star). Asterina phylactica (A cushion star). Asteronyx loveni (A brittlestar). ...
During development, the embryos and larvae of the starfish Asterina pectinifera possess a single type of mesenchyme cell. The ... N2 - During development, the embryos and larvae of the starfish Asterina pectinifera possess a single type of mesenchyme cell. ... AB - During development, the embryos and larvae of the starfish Asterina pectinifera possess a single type of mesenchyme cell. ... abstract = "During development, the embryos and larvae of the starfish Asterina pectinifera possess a single type of mesenchyme ...
Click a column header to sort by that column. Hold shift and click to sort by multiple columns. ...
Asterina acalyphae. strBasionym Asterina acalyphae. strCatalogNumber MICH13794. * view full record for item. ...
Asterina species... and yes, I have read the GARF info. I do not believe it is accurate., I had been in the SPS end of things ... do check out my take on Asterina and other sea stars in the recent article on reefkeeping.com from a couple of months ago. Best ...
Asterina/physiology*; Biological Transport; Cell Cycle; Enzyme Inhibitors/pharmacology; Female; Immunohistochemistry; Multidrug ...
Asterina exigua (Lamarck, 1816) -- invalid. Asterinopsis penicillaris (Lamarck, 1816) -- invalid. Asteriscus rosaceus (Lamarck ...
Asterina pancerii (Gasco, 1876) (basis of record). Asterina phylactica Emson & Crump, 1979 (basis of record). Asterina wega ... Asterina Nardo, 1834 (basis of record). Asterina gibbosa (Pennant, 1777) (basis of record). ... European waters (ERMS scope) for Asterina gibbosa (Pennant, 1777) European waters (ERMS scope) for Asterina pancerii (Gasco, ... European waters (ERMS scope) for Asterina phylactica Emson & Crump, 1979 European waters (ERMS scope) for Asterina wega ...
Asterina sea stars have been accused, unfairly at times, for preying on coral tissue. While some individuals appear to eat some ... Returning to our example of the common, small Asterina species found in some reef tanks, these sea stars in recent years have ... Within the genus Asterina are one or more species of stars that are prolific in reef aquaria. They usually appear accidentally ... In the case of Asterina, many years ago during the bare-bottomed, nutrient poor Berlin style era of reef keeping, reef ...
Is this an asterina starfish and should I be worried for my coral? By MultipleTankSyndrome, September 26, 2018. ...
It was a 1cm across asterina type blotched with lavender and baby blue. I have watched these engulf a polyp and after they ... There are probably numerous species of white asterina, some of which might be likely to eat coral. I had a linkia that ate ... Do they really eat your polyps? I have asterina stars all over my tank (several different types), but I havent noticed any ...
Could it be an asterina star? Theyre really small, fairly common starfish that can hitchhike on live rock. ...
Nucleotide sequence and gene organization of the starfish Asterina pectinifera mitochondrial genome. Asakawa S, Himeno H, Miura ...
Mycena asterina Desjardin, Capelari & Stevani (2007); Mycenaceae. Mycena asterophora Singer (1983); Mycenaceae. Mycena atava ...
Asterina sinsuiensis Asterina sinsuieiensis Han Lee 2012-02-27 10:33:06 update 140057 Asterina sinsuieiensis author; Han Lee ...
Chemical and structural characterization of α-N-acetylgalactosaminidase I and II from starfish, asterina amurensis. Rashid MH, ...
Hos arten Asterina gibbosa blir alle født som hanner. Når hannene når en viss størrelse slutter den å produsere sperm, men ...
asterina. *30/04/2013 at 7:21 am. kalau dari sma masuk ke D4 kebidanan boleh gak ?? ...
ASTERINA SCULPTURE. FREE SHIPPING5.75"W x 3.5"D x 13.75"H , 8"W x 4"D x 14.75"H ...
Asterina gibbosa. *Temporal change*Records submitted to Data Centre in 2022. *Tags ...
ambulacralasterinaasterina gibbosaasteroideaastropectenastropecten aranciacusblue spiny starfishbrittle starscoscinasterias ... STARLET (Asterina gibbosa). The arms of this little star (from 2 to 4 cm) are not many differentiated from the central disc. It ... Starlet (Asterina gibbosa) (Picture: Glaucus).. REFERENCES. *Club dImmersió de Biologia: Estrelles de mar ...
ASTERINA STARS, white starfish crawling around on your glass. Asterinas are mostly friendly in our tanks and are good, but... ...
Asterina pectinifera Narrower Concept UI. M0457077. Registry Number. txid7594. Terms. Asterina pectinifera Preferred Term Term ... Asterina Preferred Concept UI. M0457076. Registry Number. txid7593. Related Numbers. txid7594. Scope Note. A genus of STARFISH ... Asterina Preferred Term Term UI T561965. Date12/08/2003. LexicalTag NON. ThesaurusID NLM (2005). ... Asterina pectinifera Registry Number. txid7593. Related Numbers. txid7594. Previous Indexing. Echinodermata (1966-1973). ...
Asterina pectinifera Narrower Concept UI. M0457077. Registry Number. txid7594. Terms. Asterina pectinifera Preferred Term Term ... Asterina Preferred Concept UI. M0457076. Registry Number. txid7593. Related Numbers. txid7594. Scope Note. A genus of STARFISH ... Asterina Preferred Term Term UI T561965. Date12/08/2003. LexicalTag NON. ThesaurusID NLM (2005). ... Asterina pectinifera Registry Number. txid7593. Related Numbers. txid7594. Previous Indexing. Echinodermata (1966-1973). ...
Uneven distribution pattern and increasing numbers of mesenchyme cells during development in the starfish, Asterina pectinifera ...
  • Uneven distribution pattern and increasing numbers of mesenchyme cells during development in the starfish, Asterina pectinifera . (keio.ac.jp)
  • ASTERINA STARS are white starfish crawling around on your glass. (reefdvms.com)
  • 5 Asterina Starfish Predators For Your Aquarium Tank! (pawfectpawprint.com)
  • Asterina starfish can be the bane of many fish keepers lives as they are difficult to get rid of once they end up getting into your tank and many people end up reaching out and asking for advice on getting rid of asterina starfish in their tank. (pawfectpawprint.com)
  • Read More about 5 Asterina Starfish Predators For Your Aquarium Tank! (pawfectpawprint.com)
  • The most common outbreak starfish species are Asterias amurensis and Asterina pectini-fera. (bvsalud.org)
  • Above a Cushion Star Asterina gibbosa on a colony of the star ascidian Botryllus schlosseri . (anbollenessor.com)
  • We report here the cloning and the expression of an orthologue of this gene, AmHNF6, from the sea star Asterina miniata. (cmu.edu)
  • Of these, Asterina arkemibeyi and A. deridicola are the new species and the genus Viegasia forms a new generic record and V. cissampeli is reported here for the first time from India. (semanticscholar.org)
  • Bat Sea Stars (Asterina minuita) in rocky reef habitatat 31 meters depth. (noaa.gov)
  • During development, the embryos and larvae of the starfish Asterina pectinifera possess a single type of mesenchyme cell. (elsevier.com)
  • Nucleotide sequence and gene organization of the starfish Asterina pectinifera mitochondrial genome. (nih.gov)
  • The present study investigated the role of macrophage migration inhibitory factor (MIF) - an evolutionarily conserved cytokine that is functionally similar to chemokines - in the larvae of the starfish Patiria (Asterina) pectinifera, which were found to possess two orthologs, ApMIF1 and ApMIF2. (elsevier.com)
  • Some species may become a nuisance by their sheer numbers and prolific nature like Asterina , while others are clearly harmless or helpful by stirring detritus or consuming algae, for example. (reefkeeping.com)
  • Is this an asterina starfish and should I be worried for my coral? (nano-reef.com)
  • They can be kept in a reef tank because it does not hurt the coral, and they actually help the coral by eating parasitic Asterina starfish. (fishlaboratory.com)
  • Could it be an asterina star? (ratemyfishtank.com)
  • The video is on Asterina which are a common star fish found in aquaria that some people worry about but really shouldn't. (fishtankfan.com)
  • ASTERINA STARS , white starfish crawling around on your glass. (reefdvms.com)
  • The other difficulty with them is that most sea stars (asterina and chocolate chip are NOT among them) require odd diets so don't often do well in aquaria. (fishtankfan.com)
  • Small Asterina starfish eat algae as a side benefit. (wzaquarium.com)
  • Asterina starfish are small, around 1/4" - 1/2" across and can reach a maximum size of 3/4″, or 2cm. (voyance-tarot.org)