By Glynn, Peter W Enochs, Ian C; McCosker, John E; Graefe, Abigail N Abstract: Adult individuals of the pearlfish Carapus mourlani (Petit, 1934) occur commonly in the mantle cavity of the opisthobranch mollusc Dolabella auricularia (Lightfoot, 1786) in shallow marine waters of the Gulf of Chiriqui, Pacific Panama. Nearly 30% of the molluscan hosts collected during the day on a coral reef contained one or two fish. Feeding observations of a captive fish as well as the intact condition of the hosts ctenidium and other internal organs suggest that C. mourlani is an inquiline commensal and not parasitic. Fish curl around the ctenidium during the day and capture microcrustaceans when the fish emerge from their host at night to feed. From low-light infrared video recordings, Carapus was observed to accurately grasp rapidly swimming amphipods in nearly total darkness and ingest them. This symbiotic relationship appears to benefit Carapus by allowing the fish to avoid predators during the day and to ...
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Abstract: The central nervous system (CNS) of a metamorphically competent larva of the caenogastropod Ilyanassa obsoleta contains a medial, unpaired apical ganglion (AG) of approximately 25 neurons that lies above the commissure connecting the paired cerebral ganglia. The AG, also known as the cephalic or apical sensory organ (ASO), contains numerous sensory neurons and innervates the ciliated velar lobes, the larval swimming and feeding structures. Before metamorphosis, the AG contains 5 serotonergic neurons and exogenous serotonin can induce metamorphosis in competent larvae. The AG appears to be a purely larval structure as it disappears within 3 days of metamorphic induction. In competent larvae, most neurons of the AG display nitric oxide synthase (NOS)-like immunoreactivity and inhibition of NOS activity can induce larval metamorphose. Because nitric oxide (NO) can prevent cells from undergoing apoptosis, a form of programmed cell death (PCD), we hypothesize that inhibition of NOS activity ...
Abstract: Production of nitric oxide (NO), an evolutionarily conserved, intercellular signaling molecule, appears to be required for the maintenance of the larval state in the gastropod mollusc Ilyanassa obsoleta. Pharmacological inactivation of endogenous nitric oxide synthase (NOS), the enzyme that generates NO, can trigger metamorphosis in physiologically competent larvae of this species. Neuropils in the brains of these competent larvae display histochemical reactivity for NADPH diaphorase (NADPHd), an indication of neuronal NOS activity. The intensity of NADPHd staining is greatest in the neuropil of the apical ganglion (AG), a region of the brain that contains the apical sensory organ and that innervates the bilobed ciliated velum, the larval swimming and feeding organ. Once metamorphosis is initiated, the intensity of NADPHd staining in the AG and presumably, concomitant NO production, decline. The AG is finally lost by the end of larval metamorphosis, some 4 days after induction. To ...
Introduction. A2 Biology Investigation Comparing the mean ratios of shell height/diameter of the Patella spp on an exposed and sheltered shore Rebekah Riley Candidate number: 5037 Centre number: 28384 Background Information Limpets are slow moving molluscs, characteristic of rocky shores and are very well adapted to life on the seashore. They have a hard shell to protect themselves against predators and damage from moving rocks, and a large muscular foot that enables them to clamp firmly onto rocks to conserve water and maintain their position during rough weather. The most common limpet is Patella vulgata. The conical shell of Patella vulgata can be up to 6 cm long with radiating ridges and the apex central or slightly anterior. Orton (1928) has shown that individuals that inhabit the upper shore generally have a taller shell and smaller shell length when compared to juveniles and lower shore organisms. The thickness of shells is believed to be concerned with heat insulation and water ...
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The top picture shows polar lobe formation during the first cell division. One can see two polar bodies. Polar bodies are the tiny sister cells of the oocyte which are produced during meiosis, contain discarded DNA and mark the animal pole of the embryo (up in the first three pictures). The opposite pole of the embryo is the vegetal pole. The two cells at the animal pole are the first two blastomeres. What looks like a third cell at the vegetal pole is the polar lobe, which at this stage is nearly completely cinched off from either blastomere. Subsequently the polar lobe fuses with one of the blastomeres (second picture from top), so that by the end of the first cell division one of the blastomeres (called CD) is noticeably larger than the AB cell (third picture from top). Polar lobe also forms at the second cell division (not shown). At the four-cell stage blastomere D is the largest, blastomere C is the second largest, while A and B cells are about the same size (bottom picture). The first ...
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Paua is a New Zealand summer delicacy. When someone says "paua fritter" they are usually referring to something made from blackfoot paua. The blackfoot paua (Haliotis iris) species is endemic to New Zealand and found throughout the country. It is most abundant on shallow reefs.. Paua belong to a group of primitive gastropod molluscs known as abalone. Worldwide there are about 55 species.. Three species of abalone occur in New Zealand: blackfoot paua (Haliotis iris), yellowfoot paua (Haliotis australis), and whitefoot paua (Haliotis virginea).. Blackfoot paua has a beautifully coloured shell; haliotis means sea ear and iris refers to the rainbow colour.. The hard shell is well adapted to living on rocks being battered by big surf. Although most paua live in water less than 10 metres deep, they may be found down to 15 metres, particularly in places exposed to large oceanic swells.. They feed by the backwards and forwards motion of their ribbon-like tongue and 100-150 rows of teeth. Small paua rasp ...
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A genus of marine gastropods, including many species of limpets. The shell has the form of a flattened cone. The common European limpet (Patella vulgata) is largely used for food.
Free Online Library: Can the collection of Tyrian purple from Plicopurpura pansa (Gould, 1853) (Prosobranchia, Muricidae) be blamed for its declining population? by Journal of Shellfish Research; Zoology and wildlife conservation Biological sciences Population biology Snails Physiological aspects
Cemadotin, also known as, LU103793, is a mitosis inhibitor potentially for the treatment of solid tumours. Cemadotin is also a synthetic derivative of Dolastatin 15, an antiproliferative compound which was isolated from the mollusk Dolabella auricularia. Like Dolastatin 15, LU103793 is highly cytotoxic in vitro (IC50 = 0.1 nM). LU103793 inhibits microtubule polymerization in a concentration-dependent manner (IC50 = 7 microM). Treatment with this compound also induced depolymerization of preassembled microtubules. Cell cycle analysis of tumor cell lines treated with LU103793 indicated a block in the G2-M phase.
The Mollusca , common name of molluscs or mollusks, are a large phylum of invertebrate animals. Mollusca is the largest marine phylum, comprising about 23% of all the named marine organisms.
2005 (Swedish)In: Den gamla översättningen: Karl XII:s bibel och dess receptionshistoria : föredrag vid en konferens i Lund den 21-25 februari 2003 anordnad av Kungl. Humanistiska Vetenskapssamfundet i Lund / [ed] Tord Larsson - Birger Olsson, Stockholm: Almqvist & Wiksell, 2005, 1, 141-154 p.Chapter in book (Other academic) ...
Bekijk Stockfoto van Members Of The Class Aplacophora Of The Phylum Mollusca Are Wormlike Animals That Lack A Shell But Have Calcareous Scales Or Spicules In Their Integument They Are Marine Animals Mostly From Deep Waters Sem. Ga voor hoogwaardige fotos met een hoge resolutie naar Getty Images.
The aim of this study was to investigate the biosorption characteristics of Cd2+, Cu2+, and Pb2+ by the fruiting body of jelly fungus Auricularia polytricha. Batch experiments were conducted to charac
We beg your pardon that some of the local info is only available in German language. Dear colleagues! We need your help to complete these websites and, please, link to www.mollusca.de in order to spread the knowledge about it. Please, send relevant information concerning these pages - they can only be as useful as your contributions, thank you ...
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Molluscan Research is a major journal for the publication of research articles and reviews in all branches of malacology (the study of Mollusca)
SWISS-MODEL Template Library (SMTL) entry for 3jvt.1. Calcium-bound Scallop Myosin Regulatory Domain (Lever Arm) with Reconstituted Complete Light Chains
1KK7: Crystallographic findings on the internally uncoupled and near-rigor states of myosin: further insights into the mechanics of the motor.
attains three inches in length, is of a yellow colour, with the mantle covered with small round warts. Hence in size, form, hue, and surface, the animal bears no small resemblance to the half of a lemon cut through lengthways, especially when the branchial plumes and the dorsal tentacles are concealed by being withdrawn into their respective cavities. But the colour is not always plain yellow; it sometimes verges to grey, and is frequently marked in the most beautiful manner with large spots and clouds of crimson or purple. The branchial flower is composed of eight plumes, which are large, tripinnate, and of a bluish white hue.. ...
Animals Time is an online animals encyclopedia that provides information about animals. School teachers from all over the world have been recommending Animals Time to their students for their animal research projects. Enjoy your visit and have a great time at Animals Time ...
மெல்லுடலிகள் (Mollusca) என்பது முதுகெலும்பற்ற விலங்குகளில் இரண்டாவது மிகப்பெரிய தொகுதி ஆகும். இதுவரை சுமார் 85,000 மெல்லுடலிகள் இனம் காணப்பட்டுள்ளன. இவை மிக மெலிதான ஓடுகளைக் கொண்டு இருக்கும்.[2]. மெல்லுடலிகளில் மொத்தம் 100,000க்கும் மேற்பட்ட இனங்கள் இருந்துள்ளதாக புதைப்படிவங்களின் மூலம் அறியமுடிகிறது. மேலும் 70,000க்கும் அதிகமான சிற்றினங்கள் அற்றுப்போய்விட்டன. முத்துச்சிப்பி, கணவாய் ...
binary compound that occurs at room temperature as a clear colorless odorless tasteless liquid; freezes into ice below 0 degrees centigrade and boils above 100 degrees centigrade; widely used as a solvent. ...
The enzymatic, oxidative and photolytic reaction of bioactive compounds found in D. orbita hypobranchial glands (Muricidae, Mollusca) with corresponding solubil
Patella vulgata, homeopathic remedy made by Remedia Homeopathy in its own laboratories. Highest quality due to own laboratories and 250 years of experience.
Neurons in the cerebropleural ganglia (CPG), photoreceptors in the eye, optic ganglion cells, and statocyst hair cells of the nudibranch mollusk Hermissenda crassicornis responded in specific ways, as recorded intracellularly, to stimulation of the chemosensory pathway originating at the tentacular chemoreceptors as well as to stimulation of the visual pathway originating at the photoreceptors. Synaptic inhibition of photoreceptors occurs via the chemosensory pathway. The possible significance of such intersensory interaction is discussed with reference to preliminary investigation of the animals gustatory behavior and possible neural mechanisms of behavioral choice. ...
Elysia chlorotica is not an ordinary sea slug (a mollusc). Elysia chlorotica is a photosynthetic sea animal. Like plants, it is capable of converting sunlight into energy.. The photosynthetic ability of Elysia chlorotica is the result of incorporation of algal (Vaucheria litorea) chloroplasts (organelles found in plant cells in which photosynthesis occurs) and chlorophyll producing genes into its molluscan cells. Vaucheria litorea belongs to the yellow-green algae of the class Xanthophyceae.. These slugs initially got the chlorophyll producing genes from the algae that they had eaten. Present generations of slugs have received these genes from their parent generations, and they are passing them to their daughter generations.. Elysia chlorotica gets its chlorophyll-making genes through genetic inheritance, but still is unable to carry out photosynthesis until it consumes adequate quantity of algae so as to receive necessary chloroplasts, which it is unable to produce by itself.. ...
The effect of dietary substitution of casein with fishmeal, soybean meal and crustacean meal on the growth of the abalone Haliotis discus hannai Ino was determined. A 350 g casein per kilogram diet was included into the CS diet. The whole casein was then substituted by: (1) 300 g fishmeal and 200 g soybean meal per kilogram diet (FS), (2) 200 g fishmeal, 200 g soybean meal and 130 g krill meal per kilogram diet (FSK), (3) 200 g fishmeal, 200 g soybean meal and 280 g red crab meal per kilogram diet (FSC) or (4) 200 g fishmeal, 200 g soybean meal and 130 g shrimp head meal per kilogram diet (FSS). In addition, a 50-g by-product of green tea per kilogram diet was included in the FS diet to form the FSG diet. Sea tangle (ST)diet was supplied to abalone as a control feed. Weight gain, final shell length and final shell width of abalone fed with the various substitution feeds (FS, FSK, FSC, FSS and FSG) were not different from those obtained with the CS diet. All the formulated feeds, however, ...
The adductor muscles are the main muscular system in bivalve mollusks, i.e. in clams, scallops, mussels, oysters, etc. In many parts of the world, when people eat scallops, the adductor muscles are the only part of the soft parts of the animal which are eaten. Adductor muscles leave noticeable scars or marks on the interior of the shells valves. Those marks (known as adductor muscle scars) are often used by scientists who are in the process of identifying empty shells to determine their correct taxonomic placement. Bivalve mollusks generally have either one or two adductor muscles. The muscles are strong enough to close the valves of the shell when they contract, and they are what enable the animal to close its valves tightly when necessary, such as when the bivalve is exposed to the air by low water levels, or when it is attacked by a predator. Most bivalve species have two adductor muscles, which are located on the anterior and posterior sides of the body.[1] Some families of bivalves have ...
Hypoxia and hyperthermia are two connected consequences of the ongoing global change that constitute major threats for coastal marine organisms. In the present study, we used a proteomic approach to characterize the changes induced by hypoxia in individuals of the great scallop, Pecten maximus, subjected to three different temperatures, i.e. 10°C, 18°C and 25°C. We did not observe any significant change induced by hypoxia in animals acclimated at 10°C. Contrastingly at 18°C and 25°C, 16 and 11 protein spots were differentially accumulated between normoxia and hypoxia, respectively. Moreover, biochemical data, i.e. octopine dehydrogenase activity and arginine assays suggests that animals grown at 25°C switched their metabolism towards anaerobic metabolism when exposed to either normoxia or hypoxia, suggesting that this temperature is out of the scallops optimal thermal window. In all, 11 proteins could be unambiguously identified by mass spectrometry, involved in protein modifications and
The king scallop Pecten maximus is a high valuable species of great interest in Europe for both fishery and aquaculture. Notably, there has been an increased investment to produce seed for enhancement programmes of wild scallop populations. However, hatchery production is a relatively new industry and it is still underdeveloped. Major hurdles are spawning control and gamete quality. In the present study, a total of 14 scallops were sampled in the bay of Brest (Brittany, France) to compare transcriptomic profiles of mature oocytes collected by spawning induction or by stripping. To reach such a goal, a microarray analysis was performed by using a custom 8x60K oligonucleotide microarray representing 45,488 unique scallop contigs. First we identified genes that were differentially expressed depending on oocyte quality, estimated as the potential to produce D-larvae. Secondly, we investigated the transcriptional features of both stripped and spawned oocytes. Genes coding for proteins involved in
The camouflaging abilities of cuttlefish ( Sepia officinalis) are remarkable and well known. It is commonly believed that cuttlefish-although color blind-actively match various colors of their immedia
Looking for Bivalve molluscs? Find out information about Bivalve molluscs. One of the five classes in the phylum Mollusca, sometimes known as Pelecypoda. All bivalves are aquatic, living at all depths of the sea and in brackish and... Explanation of Bivalve molluscs
Gérard Thouzeau. Experimental collection of post-larvae of Pecten maximus (L.) and other benthic macrofaunal species, in the Bay of Saint-Brieuc. I - Settlement patterns and biotic interactions among the species collected. Journal of Experimental Marine Biology and Ecology, Elsevier, 1991, 148 (2), pp.159-179. 〈hal-00524790〉 ...
Transcriptomic features of Pecten maximus oocyte quality and maturation. . Biblioteca virtual para leer y descargar libros, documentos, trabajos y tesis universitarias en PDF. Material universiario, documentación y tareas realizadas por universitarios en nuestra biblioteca. Para descargar gratis y para leer online.
The pedal ganglia are connected to other ganglia through large connectives: the Pedal-Pleural connective and the Cerebro-Pedal connective. In addition, there are two commissures that connect the left and right pedal ganglia: the large commissure is known simply as the Pedal Commissure, the smaller, more anterior commissure is called the parapedal commissure. The nerves leaving the pedal ganglion are numbered in an anterior to posterior fashion (P1-P10). Unlike the other nerves, P10 is a midline nerve that exits from the parapedal commissure. Cobalt backfilling of the 9 paired nerves by Hening et al., 1979, indicates that each nerve contains axons of neurons from several cell clusters that are dispersed through the ganglion. ...
Gutowska, Magdalena A; Melzner, Frank (2009): Seawater carbonate chemistry and biological parameters of Sepia officinalis during experiments, 2009. PANGAEA, https://doi.org/10.1594/PANGAEA.758066, Supplement to: Gutowska, MA; Melzner, F (2009): Abiotic conditions in cephalopod (Sepia officinalis) eggs: embryonic development at low pH and high pCO2. Marine Biology, 156(3), 515-519, https://doi.org/10.1007/s00227-008-1096-7
The lack of homogeneity in field application of Bacillus thuringiensis formulation often results in ingestion of sub-lethal doses of the biopesticide by a fraction of pest population and there by promotes the toxin tolerance and resistance in long term. Gut regeneration seems to be one of the possible mechanism by which this is accomplished. However, the existing information is primarily derived from in vitro studies using mid-gut cell cultures. Present study illustrates cellular and molecular changes in mid-gut epithelium of a Bt-susceptible polyphagous insect pest castor semilooper, Achaea janata in response to a Cry toxin formulation. The present report showed that prolonged exposure to sub-lethal doses of Cry toxin formulation has deleterious effect on larval growth and development. Histological analysis of mid-gut tissue exhibits epithelial cell degeneration, which is due to necrotic form of cell death followed by regeneration through enhanced proliferation of mid-gut stem cells. Cell death is
Arginine kinase (AK), an important member of the phosphokinase family, is involved in temporal and spatial adenosine triphosphate (ATP) buffering systems. AK plays an important role in physiological function and metabolic regulations, in particular tissues with high and fluctuating energy demands. In present study, four AK genes were firstly identified from Yesso scallop (Patinopecten yessoensis) genome, respectively named PyAK1-4. PyAKs have highly conserved structures with a six-exon/five-exon structure, except for PyAK3. PyAK3 contains an unusual two-domain structure and a "bridge intron" between the two domains, which may originate from gene duplication and subsequent fusion. Phylogenetic analysis showed that all PyAKs belonged to an AK supercluster together with other AK proteins from Mollusca, Platyhelminthes, Arthropoda, and Nematode. A transcriptome database demonstrated that PyAK3 and PyAK4 were the main functional executors with high expression level during larval development and in ...
It can be seen from the available mollusk mitogenomes that the family Pectinidae exhibits the most variation in genome organization. In this study, comparative mitogenomic analyses were performed for three scallops from the subfamily Chlamydinae (Pectinidae), with the goal of characterizing the degree of variability of mitogenome organization and other characteristics among species from the same subfamily and exploring their possible evolution route. The complete or nearly complete mtDNA sequences of scallop Mimachlamys nobilis (17 935 bp), Mizuhopecten yessoensis (20 964 bp) and Chlamys farreri (17 035 bp) were determined using long PCR amplification and primer walking sequencing strategy. Highly variable size difference of the three genomes resulted primarily from length and number variations of non-coding regions, and the major difference in gene content of the three scallop species are due to varying tRNA gene sets. Only 21, 16, and 17 tRNA genes were detected in the mitogenomes of M. nobilis, M.
Ferritin cores from human spleen, limpet (Patella vulgata) haemolymph and bacterial (Pseudomonasaeruginosa) cells have been investigated using 57Fe Mössbauer spectroscopy. The Mössbauer spectra were recorded over a range of temperatures from 1.3 to 78 K. At 78 K, all the spectra are quadrupole-split doublets with similar quadrupole splittings and isomer shifts, characteristic of iron(III), while at sufficiently low temperatures the spectra of all the samples show well-resolved magnetic splitting. At intermediate temperatures, the spectra from the human ferritin exhibit typical superparamagnetic behaviour, while those from the bacterial ferritin show behaviour corresponding to a transition from a magnetically ordered to a paramagnetic state. The spectra from the limpet ferritin show a complex combination of the two effects. The results are discussed in terms of the magnetic behaviour of small particles. The data are consistent with magnetic ordering temperatures of about 3 and 30 K for the ...
Read "The morphofunctional characterization and ploidy levels of the digestive gland cells in prosobranch gastropod mollusks (Prosobranchia: Gastropoda) with special reference to somatic polyploidy, Russian Journal of Marine Biology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Browsing Faculty of AgriSciences by Title "Transcriptome characterization of the South African abalone Haliotis midae using sequencing-by-synthesis ...
Define genus Haliotis. genus Haliotis synonyms, genus Haliotis pronunciation, genus Haliotis translation, English dictionary definition of genus Haliotis. Noun 1. genus Haliotis - type genus of the family Haliotidae Haliotis mollusk genus - a genus of mollusks family Haliotidae, Haliotidae - abalones abalone,...
1 lb bay scallops In a small bowl, soak the porcinis in the boiling water until softened, about 15 minutes. Remove the mushrooms and strain their liquid into a medium saucepan through a sieve lined with a paper towel. Rinse the mushrooms well to remove any remaining grit and chop them. Add the broth, water and clam base to the mushroom-soaking liquid and bring to a simmer.. In a large pot, heat the oil and butter over moderately low heat. Add the onion and cook, stirring occasionally, until translucent, about 5 minutes. Add the garlic and rice and stir until the rice begins to turn opaque, about 2 minutes. Add the wine and salt and cook, stirring, until the wine has been absorbed.. Stir in the dried mushrooms and 1/2 cup of the simmering stock; cook, stirring frequently, until the stock has been absorbed. The rice and the stock should bubble gently; adjust the heat as needed. Continue cooking the rice, adding the stock a ladleful at a time and allowing the rice to absorb the stock before adding ...