An infraorder of chiefly marine, largely carnivorous CRUSTACEA, in the order DECAPODA, including the genera Cancer, Uca, and Callinectes.

The respiratory responses of Carcinus maenas to declining oxygen tension. (1/818)

The degree of respiratory independence shown by Carcinus under conditions of declining oxygen tension is dependent on the animal's level of activity. Inactive Carcinus are capable of maintaining respiratory independence down to a Po2 of 60-80 mmHg. This is achieved primarily by an increase in ventilation volume such that the amount of oxygen made available at the respiratory surfaces remains constant over a wide range of oxygen tension. The Po2 at which this can no longer be maintained corresponds closely to the Po2 at which respiratory independence is lost. Under normoxic conditions the Po2 of the post- and prebranchial blood was 97 and 18 mmHg respectively. At the high oxygen tensions prevailing in the postbranchial blood the respiratory pigment is fully saturated. Under conditions of declining oxygen tension the heart rate remains more or less constant until the Po2 reaches 60-80 mmHg, the onset of bradycardia coinciding with the loss of saturation of the haemocyanin. Although cardiac output falls during hypoxia, the capacity rate ratio remains approximately constant, which enables the effectiveness of oxygen uptake by the blood to remain at a high level.  (+info)

Gating of afferent input by a central pattern generator. (2/818)

Intracellular recordings from the sole proprioceptor (the oval organ) in the crab ventilatory system show that the nonspiking afferent fibers from this organ receive a cyclic hyperpolarizing inhibition in phase with the ventilatory motor pattern. Although depolarizing and hyperpolarizing current pulses injected into a single afferent will reset the ventilatory motor pattern, the inhibitory input is of sufficient magnitude to block afferent input to the ventilatory central pattern generator (CPG) for approximately 50% of the cycle period. It is proposed that this inhibitory input serves to gate sensory input to the ventilatory CPG to provide an unambiguous input to the ventilatory CPG.  (+info)

Network oscillations generated by balancing graded asymmetric reciprocal inhibition in passive neurons. (3/818)

We describe a novel mechanism by which network oscillations can arise from reciprocal inhibitory connections between two entirely passive neurons. The model was inspired by the activation of the gastric mill rhythm in the crab stomatogastric ganglion by the modulatory commissural ganglion neuron 1 (MCN1), but it is studied here in general terms. One model neuron has a linear current-voltage (I-V) curve with a low (L) resting potential, and the second model neuron has a linear current-voltage curve with a high (H) resting potential. The inhibitory connections between them are graded. There is an extrinsic modulatory excitatory input to the L neuron, and the L neuron presynaptically inhibits the modulatory neuron. Activation of the extrinsic modulatory neuron elicits stable network oscillations in which the L and H neurons are active in alternation. The oscillations arise because the graded reciprocal synapses create the equivalent of a negative-slope conductance region in the I-V curves for the cells. Geometrical methods are used to analyze the properties of and the mechanism underlying these network oscillations.  (+info)

The effects of osmotic stress on the electrical properties of the axons of a marine osmoconformer (Mala squinado. brachyura: crustacea). (4/818)

In contrast to the depolarization observed in hyperosmotic media, exposure of peripheral nerve to hyposmotic conditions induced pronounced axonal hyperpolarization. It is suggested that this hyperpolarization resulted from increased potassium and chloride permeabilities which could assist axonal volume regulation in hyposmotic conditions. The hyperpolarization was readily reversible, but the spike-generating mechanism suffered irreversible damage at hyposmotic concentrations below 665 m-osmoles. It is suggested that this axonal damage contributes to the lethal effects of hyposmotic stress in this crustacean osmoconformer and, possibly, in some euryhaline osmoregulators.  (+info)

Selective inhibition of transient K+ current by La3+ in crab peptide-secretory neurons. (5/818)

Although divalent cations and lanthides are well-known inhibitors of voltage-dependent Ca2+ currents (ICa), their ability to selectively inhibit a voltage-gated K+ current is less widely documented. We report that La3+ inhibits the transient K+ current (IA) of crab (Cardisoma carnifex) neurosecretory cells at ED50 approximately 5 microM, similar to that blocking ICa, without effecting the delayed rectifier K+ current (IK). Neurons were dissociated from the major crustacean neuroendocrine system, the X-organ-sinus gland, plated in defined medium, and recorded by whole cell patch clamp after 1-2 days in culture. The bath saline included 0.5 microM TTX and 0.5 mM CdCl2 to eliminate inward currents. Responses to depolarizing steps from a holding potential of -40 mV represented primarily IK. They were unchanged by La3+ up to 500 microM. Currents from -80 mV in the presence of 20 mM TEA were shown to represent primarily IA. La3+ (with TEA) reduced IA and maximum conductance (GA) by approximately 10% for 1 microM and another 10% each in 10 and 100 microM La3+. Normalized GA-V curves were well fit with a single Boltzmann function, with V1/2 +4 mV and slope 15 mV in control; V1/2 was successively approximately 15 mV depolarized and slope increased approximately 2 mV for each of these La3+ concentrations. Cd2+ (1 mM), Zn2+ (200 microM), and Pb2+ (100 microM) or removal of saline Mg2+ (26 mM) had little or no effect on IA. Steady-state inactivation showed similar right shifts (from V1/2 -39 mV) and slope increases (from 2.5 mV) in 10 and 100 microM La3+. Time to peak IA was slowed in 10 and 100 microM La3+, whereas curves of normalized time constants of initial decay from peak IA versus Vc were right-shifted successively approximately 15 mV for the three La3+ concentrations. The observations were fitted by a Woodhull-type model postulating a La3+-selective site that lies 0.26-0.34 of the distance across the membrane electric field, and both block of K+ movement and interaction with voltage-gating mechanisms; block can be relieved by depolarization and/or outward current. The observation of selective inhibition of IA by micromolar La3+ raises concerns about its use in studies of ICa to evaluate contamination by outward current.  (+info)

Receptor potentials and electrical properties of nonspiking stretch-receptive neurons in the sand crab Emerita analoga (Anomura, Hippidae). (6/818)

Receptor potentials and electrical properties of nonspiking stretch-receptive neurons in the sand crab Emerita analoga (Anomura, Hippidae). Four nonspiking, monopolar neurons with central somata and large peripheral dendrites constitute the sole innervation of the telson-uropod elastic strand stretch receptor in Emerita analoga. We characterized their responses to stretch and current injection, using two-electrode current clamp, in intact cells and in two types of isolated peripheral dendritic segments, one that included and one that excluded the dendritic termini (mechanosensory membrane). The membrane potentials of intact cells at rest (mean +/- SD: -57 +/- 4. 4 mV, n = 30), recorded in peripheral or neuropil processes, are similar to the membrane potentials of isolated dendritic segments and always less negative than membrane potentials of motoneurons and interneurons recorded in the same preparations. Ion substitution experiments indicate that the membrane potential is influenced strongly by Na+ conductance, probably localized in the mechanotransducing terminals within the elastic strand. The form of the receptor potential in response to ramp-hold-release stretch remains the same as stretch amplitude is varied and is not dependent on initial membrane potential (-70 to -30 mV) or recording site: initial depolarization (slope follows ramp of applied stretch), terminated by rapid, partial repolarization to a plateau (delayed depolarization) that is intermediate between the peak depolarization and the initial potential and sustained for the duration of the stretch. Responses to depolarizing current pulses are similar to stretch-evoked receptor potentials, except for small amplitude stimuli: an initial peak occurs only in response to stretch and probably reflects elastic recoil of the extracellular matrix surrounding the dendritic terminals. The rapid, partial repolarization depends on holding potential and is abolished by 4-aminopyridine (4-AP; 10 mM), implicating a fast-activating, fast-inactivating K+ conductance; TEA (60 mM) abolishes the remaining slow repolarization to the plateau. In intact cells, but not dendritic segments, regenerative depolarizations can arise in response to stretch or depolarizing current pulses; they are reduced by CdCl2 (10 microM) in the saline containing TEA and 4-AP and probably reflect current spread from Ca2+ influx at presynaptic terminals in the ganglion. We found no evidence for other voltage-activated conductances. Unlike morphologically similar "nonspiking" thoracic receptors of other species, E. analoga's nonspiking neurons are electrically compact and do not boost the analogue afferent signal by voltage-activated inward currents. The most prominent (only?) voltage-activated extra-ganglionic conductances are for potassium; by reducing the slope of the stretch-plateau depolarization curve, they extend each neuron's functional range to the full range of sensitivity of the receptor.  (+info)

Heterothermal acclimation: an experimental paradigm for studying the control of thermal acclimation in crabs. (7/818)

A method for the study of the control of the attainment of thermal acclimation has been applied to the crabs, Cancer pagurus and Carcinus maenas. Crabs were heterothermally acclimated by using an anterior-posterior partition between two compartments, one at 8 degrees C and the other at 22 degrees C. One compartment held a three-quarter section of the crab including the central nervous system (CNS), eye stalks, and ipsilateral legs; the other held a quarter section including the contralateral legs. Criteria used to assess the acclimation responses were comparisons of muscle plasma membrane fatty acid composition and "fluidity." In both species, the major fatty acids of phosphatidylcholine were 16:0, 18:1, 20:5, and 22:6, whereas phosphatidylethanolamine contained significantly less 16:0 but more 18:0; these fatty acids comprised 80% of the total. Differences in fatty acid composition were demonstrated between fractions obtained from the ipsilateral and contralateral legs from the same heterothermally acclimated individual. In all acclimation states (except 22CNS, phosphatidylcholine fraction), membrane lipid saturation was significantly increased with acclimation at 22 degrees as compared with 8 degrees C. Membrane fluidity was determined by using 1,3-diphenyl-1,3,5 hexatriene (DPH) fluorescence polarization. In both species, membranes from legs held at 8 degrees were more fluid than from legs held at 22 degrees C irrespective of the acclimation temperature of the CNS. Heterothermal acclimation demonstrated that leg muscle membrane composition and fluidity respond primarily to local temperature and were not predominately under central direction. The responses between 8 degrees C- and 22 degrees C-acclimated legs were more pronounced when the CNS was cold-acclimated, so a central influence cannot be excluded.  (+info)

Repeated hand urticaria due to contact with fishfood. (8/818)

BACKGROUND: The etiology of urticaria is often difficult to determine. However, in case of repeated circumstance-connected urticaria, the reason may be easily clarifyable. CASE: A 51-year-old healthy woman repeatedly experienced occupational hand urticaria when handling fish food. An unexpected reason for the urticaria was found in that the fishfood contained histamine as a "contaminant". CONCLUSIONS: In fishfood batches, biological degradation can produce histamine and possibly other toxic substances that can lead to occupational health problems.  (+info)

Blue crabs Callinectes sapidus Rathbun, 1896 support large commercial and recreational fisheries along the Atlantic coast and in the Gulf of Mexico (GOM). Female blue crabs are traditionally believed to produce one to six broods in their lifetime. However, recent evidence has shown that females have the ability to spawn up to eight broods in a single spawning season, with as many as 18 broods over their lifespan. In this study, fecundity and egg diameter were examined by brood class (primiparous, multiparous) in the spring and summer/fall. Mean carapace width of females was significantly different between brood class and season, with the largest females in the spring. There was a positive relationship between fecundity and carapace width. Although primiparous spring females were the most fecund (3.2 ± 1.5 million eggs), no statistically significant differences in fecundity by brood class and season were found. Loss of eggs occurred during embryonic development; primiparous females lost ~0.9 million
General aspects of the life history of the blue crab (Callinectes sapidus Rathbun) were described in the early part of the 20th century, but the larval biology of the species has remained enigmatic until recently. In the waters off the Mid-Atlantic States (MAB), spawning occurs throughout the summer with a peak in late July and early August. Gravid females migrate to the mouths of estuaries, and newly hatched larvae are quickly exported to the adjacent shelf. Development through seven zoea stages takes place in the open waters of the continental shelf and requires 4 to 5 weeks. Zoea larvae remain in surface waters, but not necessarily in the neuston, throughout development. Retention in the MAB is controlled by wind-driven, northward-flowing water located between 20 and 60 km off the coast. This northward current is between a strong, southward coastal current that hugs the immediate shoreline and a more diffuse southward flow along the outer continental shelf. Re-invasion of the estuaries of the ...
Diel sampling was conducted during June September 2013, in the shore zone and adjacent nearshore zone of Delaware Bay, Delaware, to identify day and night changes in nekton density, species richness, and the species assemblage. Mean species richness and total nekton density in the shore zone were higher at night. A detailed examination of abundant species revealed that bay anchovy (Anchoa mitchilli), weakfish (Cynoscion regalis), spot (Leiostomus xanthurus), and blue crab (Callinectes sapidus) occurred in higher densities in the shore zone at night than during the day. Bluefish (Pomatomus saltatrix) occurred in higher densities during the day. Additionally, small ...
This study was designed to determine the presence and distribution of the carbohydrate binding proteins in Callinectes sapidus serum and hemocytes, describe them by biochemical and serological characteristics, and attempt to obtain insight into their biological role. C. sapidus serum and the microsomal preparation isolated from disrupted hemocytes agglutinated a panel of untreated and enzyme-treated vertebrate erythrocytes and cultured lymphoid cell lines. Crossed absorption experiments suggested the presence of multiple specific lectins in serum. The microsomal preparation showed a 3S-fold increase in specific activity when compared to the hemocyte lysate suggesting that hemocyte lectins are membrane-associated. Agglutination by serum and hemocyte lectins was inhibited by low concentrations of N-acylamino compounds including sialic acid (NeuAc), N-acetylmuramic acid, GlcNAc, and ManNAc. Hemagglutination by lectins of both serum and hemocyte microsomal preparation required divalent cations as ...
This study was designed to determine the presence and distribution of the carbohydrate binding proteins in Callinectes sapidus serum and hemocytes, describe them by biochemical and serological characteristics, and attempt to obtain insight into their biological role. C. sapidus serum and the microsomal preparation isolated from disrupted hemocytes agglutinated a panel of untreated and enzyme-treated vertebrate erythrocytes and cultured lymphoid cell lines. Crossed absorption experiments suggested the presence of multiple specific lectins in serum. The microsomal preparation showed a 3S-fold increase in specific activity when compared to the hemocyte lysate suggesting that hemocyte lectins are membrane-associated. Agglutination by serum and hemocyte lectins was inhibited by low concentrations of N-acylamino compounds including sialic acid (NeuAc), N-acetylmuramic acid, GlcNAc, and ManNAc. Hemagglutination by lectins of both serum and hemocyte microsomal preparation required divalent cations as ...
Phosphagen kinases catalyze the reversible dephosphorylation of guanidino phosphagens such as phosphocreatine and phosphoarginine, contributing to the restoration of adenosine triphosphate concentrations in cells experiencing high and variable demands on their reserves of high-energy phosphates. The major invertebrate phosphagen kinase, arginine kinase, is expressed in the gills of two species of euryhaline crabs, the blue crab Callinectes sapidus and the shore crab Carcinus maenas, in which energy-requiring functions include monovalent ion transport, acid-base balance, nitrogen excretion and gas exchange. The enzymatic activity of arginine kinase approximately doubles in the ion-transporting gills of C. sapidus, a strong osmoregulator, when the crabs are transferred from high to low salinity, but does not change in C. maenas, a more modest osmoregulator. Amplification and sequencing of arginine kinase cDNA from both species, accomplished by reverse transcription of gill mRNA and the polymerase ...
Brachyuran crabs can effectively modulate cardiac stroke volume independently of heart rate in response to abiotic drivers. Non-invasive techniques can help to improve the understanding of cardiac performance parameters of these animals. This study demonstrates the in vivo quantification of cardiac performance parameters through magnetic resonance imaging (MRI) on the edible crab Cancer pagurus. Furthermore, the suitability of signal integrals of infra-red photoplethysmographs as a qualitative tool is assessed under severe hypoxia. Multi-slice self-gated cardiac cinematic (CINE) MRI revealed the structure and motion of the ventricle to quantify heart rates, end-diastolic volume, end-systolic volume, stroke volume and ejection fraction. CINE MRI showed that stroke volumes increased under hypoxia because of a reduction of end-systolic volumes at constant end-diastolic volumes. Plethysmograph recordings allowed for automated heart rate measurements but determination of a qualitative stroke volume proxy
The survival rate of mud crab or mangrove crab Scylla serrata larvae was evaluated using black and yellow-painted tanks. About 400,000 zoea 1 were stocked in 6 tons of treated seawater. The larvae were initially fed with rotifers and subsequently with newly hatched Artemia until the megalopa stage. The larval rearing water was enriched with a combination of Spirulina powder and frozen micro-algal products that include Nannochloropsis sp., Tetraselmis sp. and Thallasiosira weissfolgii. After 15 to 17 days of rearing, the larvae successfully molted to megalopa stage. A total of 377,062 megalopae were harvested. Although the survival rate of megalopae was higher in yellow tanks (23.63± 0.03%), it was not significantly different when compared to those in black tanks (15.66±0.02%) (P=0.05 ...
Small, H. J., Huchin-Mian, J. P., Reece, K. S., Pagenkopp Lohan, K. M., Butler, M. J., and Shields, J. D. 2019. Parasitic dinoflagellate Hematodinium perezi prevalence in larval and juvenile blue crabs Callinectes sapidus from coastal bays of Virginia. Diseases of aquatic organisms. 134 (3):215-222. https://doi.org/10.3354/dao03371 ...
The effect of different feeding rates on the production and profitability of Phases 1 and 2 (3-week each) nursery culture of hatchery-produced crab Scylla serrata was determined. Minced mussel meat and formulated diet (at a ratio of 30:70) were fed to crabs. The crabs were stocked randomly in 12-m2 net cages installed in the nursery earthen pond at stocking densities of 50 m-2 for Phase 1 and 10 m-2 for Phase 2. Crabs were fed three times daily at 0830, 1300 and 1630h h. In Phase 1, feed conversion ratio (FCR) at a feeding rate of 100% of initial crab biomass day-1 for the entire three weeks was the lowest ( ...
Fehsenfeld, Sandra, Kiko, Rainer, Towle, D. W., Zimmer, Martin and Melzner, Frank (2010) Effects of elevated seawater pCO2 on gene expression patterns and ion regulation processes in the Green crab Carcinus maenas [Invited talk] In: Alfred-Wegener-Institute (AWI) Watternmeerstation Sylt, 07.07.2010, Sylt, Germany. Full text not available from this repository. (Contact ...
[The response of embryos of the Chinese mitten crab (Eriocheir sinensis) in terms of survival to cryoprotectants was investigated for basic knowledge to enhance cryopreservation success of E. sinensis embryos. Five stages of embryonic development (cleavage, blastula, gastrula, eyed stage, and heart-beating stage embryos corresponding to 7, 14, 20, 26, and 31 days post-spawning) were chosen and exposed to various cryoprotectants, namely methanol (MeOH), propylene glycol (PG), dimethyl sulfoxide (DMSO), and dimethylformamide (DMF), at three concentrations (10, 15, 20%) for an experimental period of 30 min. at culture temperature (16°C). The toxicity tolerance of E. sinensis embryos varied with developmental stage and cryoprotectant concentration. Cleavage and blastula embryos were very sensitive to cryoprotectant concentrations above 10%. Gastrula, eyed stage, and heart-beating stage embryos tolerated cryoprotectants to 20%, although a higher survival percentage was observed in heart beating
Two copper-binding proteins and a zinc-binding ligand were isolated from the hepatopancreas of the crab Portunus pelagicus. The copper-binding proteins behave similarly to those from the crabs Carcinus maenas and Scylla serrata, and were shown to be metallothioneins. Reversed-phase high-performance liquid chromatographic (HPLC) analysis confirmed the relative purity of both proteins with only cross-contamination between the two different forms of metallothioneins, and offers a good method to separate the two forms of metallothioneins. The vast difference in the retention times (and hence the hydrophobicity) in reversed-phase HPLC indicates that the two proteins could be conformationally very different ...
Saborowski, R. , Sahling, G. , Navarette del Toro, M. A. , Walter, I. and Garcia-Carreno, F. L. (2004): Stability and effects of organic solvents on endopeptidases from the gastric fluid of the marine crab Cancer pagurus , Journal of Molecular Catalysis B-Enzymatic ...
Microsatellites are simple sequence repeats with a high degree of polymorphism in the genome; they are used as DNA markers in many molecular genetic studies. Using traditional methods such as the magnetic beads enrichment method, only a few microsatellite markers have been isolated from the Chinese mitten crab Eriocheir sinensis, as the crab genome sequence information is unavailable. Here, we have identified a large number of microsatellites from the Chinese mitten crab by taking advantage of Solexa genomic surveying. A total of 141,737 SSR (simple sequence repeats) motifs were identified via analysis of 883 Mb of the crab genomic DNA information, including mono-, di-, tri-, tetra-, penta- and hexa-nucleotide repeat motifs. The number of di-nucleotide repeat motifs was 82,979, making this the most abundant type of repeat motif (58.54%); the second most abundant were the tri-nucleotide repeats (42,657, 30.11%). Among di-nucleotide repeats, the most frequent repeats were AC motifs, accounting for 67.55%
78 ALLAN HANCOCK MONOGRAPHS IN MARINE BIOLOGY 1904. Decapod crustaceans of the northwest coast of North America. In Har- riman Alaska Exped. Washington. 10, Crustaceans, 210 p., pis. 1-10, text-figs. 1-95. 1907. Reports on the scientific results of the expedition to the tropical Pacific ... by the U. S. Fish Commission steamer Albatross from August, 1899, to March, 1900 . . . IX. Reports on the scientific results of the expedition to the eastern tropical Pacific ... by the U. S. Fish Commission steamer Albatross from October, 1904, to March, 1905 . . . X. The Brachyura. Harvard, Mus. Compar. Zool., Mem., 35: 23-74, pis. 1-9. 1910. The stalk-eyed Crustacea of Peru and the adjacent coast. U. S. Natl. Mus., Proc, 38: 531-620, pis. 36-56, text-figs. 1-3. 1923. Scientific results of the expedition to the Gulf of California ... by the U. S. Fisheries steamship Albatross in 1911 . . . XIII. The Brachyuran crabs collected by the U. S. Fisheries steamer Albatross in 1911, chiefly on the west ...
Juvenile and adult growth of Chasmagnathus granulatus was studied in the laboratory in terms of molt increment in size (MI) and the intermolt period (IP), comparing data obtained from short-term (STE) and long-term (LTE) laboratory experiments. Crabs in a premolt condition were collected for STE, including the entire size range of the species. Larger crabs remained in the laboratory no more than 14 days; the average time to molt was 5.8 ± 3.1 d. We registered the molt of 94 females, 64 males and 34 undifferentiated juveniles and calculated their MI. Moreover, 24 males and 4 females were reared in the laboratory over 3 years (LTE). Hiatt diagrams did not show sex-specific differences between juveniles of both sexes, but revealed differences between juveniles and adults in each sex as well as between adults of both sexes. The MI decreased gradually with size; this pattern was described with a quadratic model. The IP increased exponentially with size. The presence of regenerating limbs diminished ...
To investigate the role of certain neurohormones in agonistic behaviour, fights were staged between pairs of size-matched male shore crabs Carcinus maenas, and blood samples were taken immediately after the contests had been resolved. Samples were also taken from these crabs at rest (before and after fighting) and after walking on a treadmill. A control group of crabs also had samples taken on each experimental day. Concentrations of tyramine, dopamine, octopamine, serotonin (5-HT) and norepinephrine were determined in each blood sample using a gas chromatography/mass spectrometry (GC-MS) system. Norepinephrine was not detectable in any of the samples, but the standards were recovered. Tyramine values were not significantly different between the control group and the fought group, so tyramine does not appear to be important in agonistic behaviour. A comparison between the control and fought groups shows that fighting had an effect on the concentrations of octopamine, dopamine and 5-HT, but ...
Weis, J.S. 2012. Walking Sideways The Remarkable World of Crabs. Cornell University Press.. Weis, J.S., and A. Candelmo. 2012. Pollutants and fish predator/prey behavior: A review of laboratory field approaches. Current Zoology 58: 9-20.. Weis, J.S., Bergey, L., Reichmuth, J., and A. Candelmo. 2011. Living in a Contaminated Estaury: Behavioral Changes and Ecological Consequences for Five Species. Bioscience 61: 375-385.. Weis, J.S. 2011. Invasion and predation in aquatic ecosystems. Current Zoology 57: 613-624.. Reichmuth, J.M., MacDonald, J., Ramirez, J., and J.S. Weis. 2011. Fight or flight: an investigation of aggressive behavior and predator avoidance in two populations of blue crabs (Callinectes sapidus Rathbun) in New Jersey. Hydrologia 658: 173-182. Burridge, L., J.S. Weis, F. Cabello, J. Pizarro and K. Bostick. 2010. Chemical use in salmon aquaculture: A review of current practices and possible environmental effects. Aquaculture 306: 7-23.. Candelmo, A., A. Deshpande, B. Dockum, P. Weis ...
Identification of an Alpha-Tubulin Gene from the Chinese Mitten Crab Eriocheir sinensis: Expression Profiles under Immune Challenge and during Larval Development, Autoimmune hepatitis, Immune Cell Therapy, Auto immune Disease Abstract.
Read Development of 42 SNP markers for the Chinese mitten crab Eriocheir sinensis based on transcriptomics, Conservation Genetics Resources on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Urochloa brachyura. Ce taxon (syn.: Panicum brachyurum) est présent au Zimbabwe, en Namibie, en Afrique du Sud, au Zambie, au Zimbabwe. Il est considéré comme comestible (voir lAppendix A). Ce timbre fait parti dune série sur les graminées du Bophuthatswana. Cliquez sur Hyparrhenia, Panicum et Cenchrus dans la liste taxonomique pour voir les autres dans cette série. Celui-ci est le seul illustrant un Urochloa, à ce que je sache.. ...
Krun ovec chameleon (L168) (Dekeyseria brachyura)Poj d asy. M e m nit barvy. M r d kryty a ko eny. Aktivitu projevuje v noci. Pot ebuje prostor.Samci maj na prsn ch ploutv ch a vzadu na t le v r stky.Nen zn m.M rumilovn
A non-ovigerous female mitten crab captured in Iraq on the 20th June 2005 was initially identified as Eriocheir sinensis H. Milne Edwards, 1853. More material has now been made available from Iraq and Kuwait and these specimens were compared with the extant type series of E. sinensis and E. hepuensis Dai, 1991. From this morphological study the Persian Gulf material was identified as the Hepu mitten crab, E. hepuensis. This is the first report of this mitten crab species outside its native range of southern China. However, because mitten crab taxonomy and systematics requires further clarification especially with respect to species of Eriocheir De Haan, 1835, the DNA of the Persian Gulf material was compared with a suite of GenBank COI sequences from various mitten crab taxa. The results of this extensive examination indicate that the Iraqi and Kuwaiti specimens are E. hepuensis and the DNA analysis indicates that mitten crabs can be assigned to three genera and six species; although the present ...
The Cullin-RING E3s are multisubunit ubiquitin ligases composed of a scaffold protein known as Cullin, a RING finger protein that regulates diverse cellular pathways; however, their contribution to male gonad development, especially the spermatogenesis of the Chinese mitten crab (Eriocheir sinensis), is not well understood. We identified five evolutionarily conserved Cullins from the transcriptome and genome ofE. sinensis that are potentially involved in regulating male gonad development. The aim of the current study was to determine the mechanisms of Cullin4s effects on spermatogenesis. We observed that Cullin4, p53, and proliferating cell nuclear antigen had a specific expression and localization in primary spermatocytes. We also investigated the accumulation of Cullin substrates by treatment with inhibitor of NEDD8-activating enzyme MLN4924 in vitro. Cell cycle inhibitors p27 and p21 accumulated significantly after 24 and 36 h, respectively. We speculated that p53-mediated spontaneous germ cell
The Dungeness crab (Metacarcinus magister) fishery is one of the highest value fisheries in the US Pacific Northwest, but its catch size fluctuates widely across years. Although the underlying causes of this wide variability are not well understood, the abundance of M. magister megalopae has been linked to recruitment into the adult fishery 4 years later. These pelagic megalopae are exposed to a range of ocean conditions during their dispersal period, which may drive their occurrence patterns. Environmental exposure history has been found to be important for some pelagic organisms, so we hypothesized that inclusion of recent environmental exposure history would improve our ability to predict inter-annual variability in M. magister megalopae occurrence patterns compared to using in situ conditions alone. We combined 8 years of local observations of M. magister megalopae and regional simulations of ocean conditions to model megalopae occurrence using a generalized linear model (GLM) framework. The
Abstract: The ecdysial suture is the region on an arthropod exoskeleton that splits to allow the animal to escape from its old carapace. To understand why this region preferentially splits, I examined the morphology and composition of the intermolt and premolt suture of the blue crab, Callinectes sapidus, using light and scanning electron microscopy (SEM). No differences were detected between the suture and the adjacent cuticle with the general dyes acridine orange, hematoxylin and eosin, toluidine blue, periodic acid Schiff or paraldehyde fuchsin. Only three of 22 FITC-labeled lectins differentiated the suture. Lens culinaris agglutinin, Vicia faba agglutinin, and Pisum sativum agglutinin, which have an affinity for fucosylated a-N-acetylglucosamine with mannose dendrimers, bound more intensely to the exocuticle of the suture and less intensely to the endocuticle of the suture. The suture had no setae, and was paralleled by a knobbed ridge. The suture was thinner than the surrounding cuticle, ...
For the first time baseline respiration and activity were determined simultaneously for 13 specimens of the mangrove crab, Scylla serrata. Experiments were conducted in an intermittent-flow respirometer at 22 • C, ambient salinity S = 30, and low light conditions (red light, 5 W). Permanent measurements of crab activity by an infrared video system (number of movements) and oxygen consumption were coupled, allowing to determine both the routine (ROC) and standard oxygen consumption rate (SOC). The experimental setup allowed the calculation of activity, by recording single movements. Relative ROC values varied between 70 mg O 2 h −1 kg −1 wet mass (WM) for a large (285 g) specimen and 170 mg O 2 h −1 kg −1 WM for a small (37 g) specimen. Activity rates varied between 3216 movements h −1 and five hours without any movement. Mean movement rates were between 14 and 165 h −1 and mean rest rates between 2 and 23 min. Absolute ROC for a standard mass of 50 g was calculated to be 4.72 mg O ...
This research examined effects of hypoxic environments on blue crabs, Callinectes sapidus in an estuarine environment. Hypoxic conditions were treated as a multiple stressor involving low dissolved oxygen (D.O.), increased carbon dioxide (hypercapnia), and low pH concurrently. The objectives were to: 1) identify hypoxiahypercapnia by monitoring D.O. and pH as an indicator of hypercapnia in shallow regions of the York River, 2) measure blue crab abundance, and 3) describe blue crab responses to hypoxiahypercapnia via field work at Taskinas Creek and lab measurements of respiration. Ambient D.O. and pH were positively correlated in the Taskinas Creek and York River sites (r= .73). Crab abundance (CPUE) was not significantly different among D.O. and pH ranges. It was concluded that hemolymph blood lactate concentration was not considered a good in situ biomarker for exposure to hypoxickypercapnic conditions. Oxygen uptake was not significantly different between normoxic and hypoxic conditions but was
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Transcriptome Analysis of the Portunus trituberculatus: De Novo Assembly, Growth-Related Gene Identification and Marker Discovery. . 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.
NO. 1 GARTH AND STEPHENSON: PORTUNIDAE 37 (A. Petersen, of a San Lorenzo Channel, Gulf of California, specimen) Carapace variably mottled in browns, brownish green, and cream, with two dark postorbital areas and two light patches near center of posterolateral borders. White areas: center of first two abdominal segments, on distal portions of most segments of walking legs, and on outsides of chelae. Fingers mostly purple-brown with transverse white bar across middle outside of both fingers. (W. Stephenson, of 3 males and 2 females from off SE end of Tiburon Island and Puerto Escondido, Gulf of California, collected by R. Lavenberg) Ecology: Of the 130 stations for which habitat information is recorded, 58 per cent were sand, 14 per cent mud, 5 per cent rock or gravel, while 18 per cent were organic bottom (corallines, nullipores, shell, coral). The predominance of sand is further indicated by its frequent presence with mud and rock. Another 5 per cent were attracted to light. Breeding: Ovigerous ...
The global diversity of the almost 1400 species of primary brachyuran freshwater crabs that spend their entire lives in freshwater habitats is outlined, along with that of 220 species of secondary...
we r selling king mud crab from the philippines also bangus or milk fish, tiger prawn or vanamie prawn, we sell also king mud crab crablet or the crab seed, milkfi...
Microsatellite markers from a transcriptome sequence library were initially isolated, and their genetic variation was characterized in a wild population of the mud crab (Scylla paramamosain). We then tested the association between these microsatellite markers and the growth performance of S. paramamosain. A total of 129 polymorphic microsatellite markers were identified, with an observed heterozygosity ranging from 0.19 to 1.00 per locus, an expected heterozygosity ranging from 0.23 to 0.96 per locus, and a polymorphism information content (PIC) ranging from 0.21 to 0.95 per locus. Of these microsatellite markers, 30 showed polymorphism in 96 full-sib individuals of a first generation family. Statistical analysis indicated that three microsatellite markers were significantly associated with 12 growth traits of S. paramamosain. Of these three markers, locus Scpa36 was significantly associated with eight growth traits, namely, carapace length, abdomen width (AW), body height (BH), fixed finger length of
Crustacean cardioactive peptide (CCAP) is a highly conserved, amidated cyclic nonapeptide with the primary structure PFCNAFTGC-NH2 (ProPheCysAsnAlaPheTyrGlyCys-NH2) and a disulfide bridge between Cys3 and Cys9. It is found in crustaceans and insects where it behaves as a cardioaccelerator, neuropeptide transmitter for other areas of the nervous system and a hormone. CCAP was first isolated from the pericardial organs of the shore crab Carcinus maenas, where it has a role in regulating heartbeat. It was assumed that this was the peptides main function and its name reflects this. As well as C. maenas, CCAP has cardioacceleratory properties in Manduca sexta and Drosophila melanogaster; it is a highly conserved protein found in species as diverse as moths and fruit flies in addition to the crustacean it was originally identified in. Interestingly, under specific conditions, CCAP has also been shown to induce cardiac reversal in M. sexta and D. melanogaster. Since CCAP was first identified and its ...
July 13, 2021 - On a cool Thursday morning this week, Calder Deyerle powered up his Boston Whaler and headed out of Moss Landing Harbor in search of the catch of the day. But this catch had no fins or tails or claws. Deyerle was hunting crab gear.. Five or six years ago, more than 70 whales - mostly fin, blue and humpbacks - became caught in the lines that connect a surface buoy to the crab trap resting on the ocean floor. Because of a crash in the krill population, the whales came in closer to shore to feed on alternative food sources and right into the crab lines.. Lines and traps meant for Dungeness crabs can be deadly to whales that become ensnared in the equipment, often causing dehydration, infected wounds, breathing or reproduction problems and even starvation.. But efforts by Dungeness crab fishermen have dramatically reduced the number of whale entanglements. There have been none this year. The far greater threat to whales today is not from crab gear, rather from ship strikes.. Deyerle ...
Crabs are encased in a rigid exoskeleton or cuticle that is hardened by both protein crosslinking and calcification. In order to grow, the exoskeleton must be periodically molted. The two outermost layers of the exoskeleton of crabs are deposited prior to the molt, but remain uncalcified until the animal sheds its old exoskeleton. The inhibition of premolt calcification and initiation of postmolt calcification are effected by biochemical changes in the organic matrix. In the 2 h after the molt, sugar moieties are enzymatically altered on cuticular glycoproteins by an N-acetylhexosaminidase secreted by the underlying epithelium. These alterations appear to unmask nucleation sites that allow calcification to commence. The initial deposition of mineral is in the form of amorphous calcium carbonate (ACC). As postmolt calcification continues and the principal layer (endocuticle) is deposited and mineralized, the ACC is largely converted to or overgrown by calcite. Prior to the onset of ACC deposition,
InstantLabs has launched the InstantID Atlantic Blue Crab DNA verification test to help wholesalers and distributors validate the authenticity of a crab meat sample in approximately two hours. The new test was developed through a partnership with the University of Guelph, and runs on InstantLabs Hunter Real-Time PCR instrument, as well as other PCR systems, InstantLabs said. It is also the first of several planned seafood species identification assays from the company to help the seafood industry address fraud. InstantLabs said it will develop InstantID tests for snapper, catfish, grouper, and tilapia throughout 2015.
basis of record Adema, J.P.H.M. (1991). De krabben van Nederland en Belgie (Crustacea, Decapoda, Brachyura) [The crabs of the Netherlands and Belgium (Crustacea, Decapoda, Brachyura)]. Nationaal Natuurhistorisch Museum: Leiden, The Netherlands. ISBN 90-73239-02-8. 244 pp. (look up in IMIS) [details] ...
Adema, J.P.H.M. (1991). De krabben van Nederland en Belgie (Crustacea, Decapoda, Brachyura) [The crabs of the Netherlands and Belgium (Crustacea, Decapoda, Brachyura)]. Nationaal Natuurhistorisch Museum: Leiden, The Netherlands. ISBN 90-73239-02-8. 244 pp ...
TY - JOUR. T1 - Characterization of distinct ovarian isoform of crustacean female sex hormone in the kuruma prawn Marsupenaeus japonicus. AU - Tsutsui, Naoaki. AU - Kotaka, Sayaka. AU - Ohira, Tsuyoshi. AU - Sakamoto, Tatsuya. PY - 2018/3/1. Y1 - 2018/3/1. N2 - The eyestalk hormone, crustacean female sex hormone (CFSH), regulates the development of female secondary sexual characteristics in the blue crab Callinectes sapidus. After its discovery, several CFSH gene orthologs have been identified in some species of the suborder Pleocyemata as well. Similarly, in species of another suborder (Dendrobranchiata), an ortholog (Maj-CFSH) has been characterized as an eyestalk factor expressed in both females and males of the kuruma prawn, Marsupenaeus japonicus. In this study, another novel CFSH isoform was identified in the same species using cDNA cloning, expression analysis, and recombinant protein production. The isoform has CFSH-family structural characteristics but is dominantly expressed in the ...
This study elucidates the effects of chronic pH stress on the growth and metabolic response of juvenile Chinese mitten crab Eriocheir sinensis. Crabs were exposed under normal pH (control, pH = 8.0 ± 0.20), low pH (pH = 6.5 ± 0.20), and high pH (pH = 9.5 ± 0.20) in an 8-week trial. Both low and high pH suppressed weight gain but low pH had more adverse effects. No difference was observed on survival, crude lipid, and protein. Acidic stress significantly reduced protein efficiency. The malondialdehyde (MDA) content in hepatopancreas was highest at low pH. The superoxide dismutase (SOD) activity in hepatopancreas and total hemocyte counts (THC) in the stress groups were higher than that in the control. Crabs under high pH had the highest ACP and AKP activities, but there was no significant difference between the control and low pH groups. In the transcriptome analysis, 500.0M clean reads were obtained from the control, low pH, and high pH groups, and assembled into 83,025 transcripts. Kyoto
ABSTRACT: We assessed the potential of fatty acid (FA) markers for tracing primary production from an invasive green alga (Codium fragile ssp. fragile) and a native kelp (Saccharina longicruris) through 2 trophic levels in an experimental food web: a primary consumer, the green sea urchin Strongylocentrotus droebachiensis, and 2 secondary consumers, the native rock crab Cancer irroratus and invasive green crab Carcinus maenas. Sea urchins fed the 2 algal species had distinct gonadal FA compositions, and contained markers of each alga. Crabs of each species were then fed the gonads of sea urchins which had been fed either S. longicruris or C. fragile, and their hepatopancreases were analyzed. We were able to distinguish crabs of both species with C. fragile at the base of the food chain using the marker FAs 16:3n-3 and 18:3n-3. The overall FA composition of the hepatopancreas differed with diet in the green crab but not the rock crab. Our results suggest that 16:3n-3 may be a useful marker for ...
At 5.5 miles in length, the Dungeness Spit is the longest sand spit in North America. It is formed by longshore flow that takes glacial sediments from the bluffs of the Strait of Juan de Fuca and deposits it at the end of the spit as a rate of 13 feet per year. Since the lighthouse was built in 1857, the spit has grown 1/2 of a mile. The entire spit, as well as, its side branch Graveyard Spit and the Dungeness Bay is protected within the boundaries of the Dungeness National Wildlife Refuge. This refuge is home to thousands of sea birds including gulls, brants, loons, sandpipers, plovers, curlews, bald eagles, and terns. In addition, numerous harbor seals hang out on the beaches and near shore waters ...
At 5.5 miles in length, the Dungeness Spit is the longest sand spit in North America. It is formed by longshore flow that takes glacial sediments from the bluffs of the Strait of Juan de Fuca and deposits it at the end of the spit as a rate of 13 feet per year. Since the lighthouse was built in 1857, the spit has grown 1/2 of a mile. The entire spit, as well as, its side branch Graveyard Spit and the Dungeness Bay is protected within the boundaries of the Dungeness National Wildlife Refuge. This refuge is home to thousands of sea birds including gulls, brants, loons, sandpipers, plovers, curlews, bald eagles, and terns. In addition, numerous harbor seals hang out on the beaches and near shore waters ...
Schweitzer Hopkins, C. and R. M. Feldmann. 1997. Sexual dimorphism in fossil and extant species of Callianopsis de Saint Laurent. Journal of Crustacean Biology, 17(2): 236-252. Feldmann, R. M., K. L. Bice, C. Schweitzer Hopkins, and E. W. Salva. 1998. Decapod crustaceans from the Eocene Castle Hayne Formation, North Carolina: paleoceanographic implications. Paleontological Society Memoir 48, 28 p. Schweitzer Hopkins, C., E. W. Salva, and R. M. Feldmann. 1999. Reevaluation of the genus Xanthosia Bell, 1863 (Decapoda: Brachyura: Xanthidae) and description of two new species from the Cretaceous of Texas. Journal of Paleontology, 73(1):77-90. Schweitzer, C. E. and R. M. Feldmann. 1999. Fossil decapod crustaceans of the Pysht Formation (late Oligocene to early Miocene) and Quimper Sandstone (late Eocene), Olympic Peninsula, Washington. Annals of Carnegie Museum, 68:215-273. Schweitzer, C. E., R. M. Feldmann, A. B. Tucker, and R. E. Berglund. 2000. Fossil decapod crustaceans from Eocene rocks at ...
King crabs are a taxon of crab-like decapod crustaceans chiefly found in cold seas. Because of their large size and the taste of their meat, many species are widely caught and sold as food, the most common being the red king crab (Paralithodes camtschaticus).. King crabs are generally thought to be derived from hermit crab-like ancestors, which may explain the asymmetry still found in the adult forms. This ancestry is supported by several anatomical peculiarities which are present only in king crabs and hermit crabs.[2] Although some doubt still exists about this theory, king crabs are the most widely quoted example of carcinisation among the Decapoda.[2] The evidence for this explanation comes from the asymmetry of the king crabs abdomen, which is thought to reflect the asymmetry of hermit crabs, which must fit into a spiral shell. Although formerly classified among the hermit crabs in the superfamily Paguroidea, king crabs are now placed in a separate superfamily, Lithodoidea.[1] This is not ...
Davie, P.J.F., 2002. Crustacea: Malacostraca: Eucarida (Part 2): Decapoda - Anomura, Brachyura. In: Wells, A. Houston, W.W.K., Editors, Zoological Catalogue of Australia., 19.3B. CSIRO Publishing, Melbourne 641pp ...
Davie, P.J.F., 2002. Crustacea: Malacostraca: Eucarida (Part 2): Decapoda - Anomura, Brachyura. In: Wells, A. Houston, W.W.K., Editors, Zoological Catalogue of Australia., 19.3B. CSIRO Publishing, Melbourne 641pp ...
The parasitic dinoflagellate Hematodinium perezi is highly prevalent in juvenile blue crabs, Callinectes sapidus, along the eastern seaboard of the USA. Although the parasite is known to kill adult crabs, the mortality rate of naturally infected juvenile crabs remains unknown. We analyzed the influence of temperature and salinity on the mortality of recently recruited blue crab that were naturally infected with H. perezi. Over 492 juvenile crabs (infected, n=282; uninfected controls, n=210) were held individually in six-well plates and held at six temperatures (4, 10, 15, 20, 25, and 30 °C) or three salinities (5, 15, and 30 psu) for a maximum of 90 days ...
The Centre for Advanced Study in Botany, and the departments of Zoology, Biochemistry and Molecular Biology and Biotechnology together constitute the School of Life Science.. The first Natural Science department of the University of Madras viz., the Department of Zoology was started in 1927 with Sir.K.Ramunny Menon as the honorary director. The department teaches and researches in the fields of, Cryopreservatioon of gametes and embryos of penaid prawns, Eye stalk neuropeptides and control of reproduction in the decapod crustaceans, Molecular aspects of reproduction in the decapod crustaceans, Biochemistry of spermatophores and seminal plasma in Scylla serrata, Biofouling: Environmental impact assessment, Water, Quality, Viral diseases of shrimp Aquaculture of live food organism,Mass culture of fairyshrimps and brine Immunobiology of cultivable aquatic invertebrates, Physiology of respiratory pigments, Heavy metal regulation in arthropods, Cell surface glycoprotenis, Cancer and free radical ...
Elucidating the genetic mechanisms of adaptation to the hydrothermal vent in organisms at genomic level is significant for understanding the adaptive evolution process in the extreme environment. We performed RNA-seq on four different tissues of a vent crab species, Austinograea alayseae, producing 725,461 unigenes and 134,489 annotated genes. Genes related to sensory, circadian rhythm, hormone, hypoxia stress, metal detoxification and immunity were identified. It was noted that in the degenerated eyestalk, transcription of phototransduction related genes which are important for retinal function was greatly reduced; three crucial neuropeptide hormones, one molt-inhibiting and two crustacean hyperglycemic hormone precursors were characterized with conserved domains; hypoxia-inducible factor 1 and two novel isoforms of metallothioneins in the vent crabs were discovered. An analysis of 6,932 orthologs among three crabs A. alayseae, Portunus trituberculutus and Eriocheir sinensis revealed 19 positive
Three types of chitin as α (exoskeleton of crustaceans), β (cuttlebone of cephalopods) and γ (some fungal cell wall) exist in nature. Chitosan is the most important derivative of chitin, which has various biological activities. In this study, α, β and γ-chitosans were extracted from Portunus segnis exoskeleton, Sepia pharonis ...
News Release, Southern Maryland Blue Crabs. Waldorf, MD.- After dropping the front end of a scheduled twin bill on Saturday afternoon Southern Maryland had a tall task ahead of them to split the games and end their seven-game losing skid. This got even more difficult when the New Britain Bees posted five runs in the top of the first inning in game two. The Blue Crabs took the challenge head on and climbed the mountain to win a 10-8 thriller.. After losing 4-1 in the first of two games on the afternoon, and having zero comeback wins on the season, the Blue Crabs pulled out a masterpiece of a victory. Tommy Thorpe (ND, 0-0) got his first start of the season in game two of the double header, and didnt get off to the beginning that the squad drew up, allowing five runs, three of which were earned in the first inning alone. ...
2 Ministry of Agriculture, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Wuxi 214081, PR China DOI : 10.4194/1303-2712-v18_1_03 Viewed : 630 - Downloaded : 531 Androgenic gland hormone has an insulin-like structure and it is the male-specific hormone found in crustaceans. Androgenic gland hormone controls male sexual differentiation and maintains male sexual characteristics. In this study, the full-length cDNA sequence of the androgenic gland hormone gene in Eriocheir sinensis (EsIAG) was cloned. The total length of the EsIAG cDNA was 1,495 bp, encoding 151 amino acids. EsIAG has the typical conserved structure of other reported IAGs but had low sequence similarity with other crustacean IAGs. EsIAG was expressed specifically in the androgenic gland. Insulin-like growth factor binding protein 7 from the Chinese mitten crab E. sinensis (EsIGFBP7) was highly expressed in the male sex-related ...
Numerous modulatory fibers control the output of the pyloric and gastric mill neural networks in the crustacean stomatogastric ganglion (STG). We now describe the first results of intracellular recordings from the axon of one of these input neurons, stomatogastric nerve axon 1 (SNAX 1), close to where it enters the STG. SNAX 1 excites both the pyloric and gastric mill rhythms and is identified on the basis of its synaptic interactions with identified STG neurons. SNAX 1 receives synaptic input from several sources within the STG. As a result of these synaptic inputs, SNAX 1 fires bursts of action potentials that are time-locked to both the pyloric and gastric mill rhythms. The synaptic connections made onto the SNAX axon terminals are likely to play important roles in shaping the impulse activity patterns in these modulatory inputs. Thus, the fibers that modulate the pattern- generating networks in the STG are themselves influenced by elements in these networks, and modulation is a dynamic ...
Looking for online definition of Squish mitten in the Medical Dictionary? Squish mitten explanation free. What is Squish mitten? Meaning of Squish mitten medical term. What does Squish mitten mean?
A century ago, the unregulated fur trade in Southeast Alaska led to these sea otters being hunted to near extirpation (regional extinction).1 Sea otter pelts were prized because they feature the densest fur of any animal-about one million hairs /square inch of skin!2 Without wildlife protection advocacy, that could have been the end to sea otters enjoying the coastal seawaters next to Southeast Alaska ...
Despite their name, horseshoe crabs are not true crabs. The horseshoe crab, Limulus polyphemus in popular name called Horseshoe Crab, is the only member of the Arthropoda subclass Xiphosura found in the Atlantic. Unlike true crabs, which have two pairs of antennae, a pair of jaws and five pairs of legs, horseshoe crabs lack antennae and jaws and they have seven pairs of legs, including a pair of chelicerae. Chelicerae are appendages similar to those used by spiders and scorpions for grasping and crushing. In addition, horseshoe crabs have book lungs, similar to spiders and different from crabs, which have gills. Thus, horseshoe crabs are more closely related to spiders and scorpions than they are to other crabs. Their carapace is divided into three sections: the anterior portion is the prosoma; the middle section is the opithosoma; and the tail is called the telson. Horseshoe crabs have two pairs of eyes located on the prosoma: one anterior set of simple eyes and one set of lateral compound ...
The properties of acoustic interneurons in fiddler (Uca pugilalor and U. minax) and ghost (Ocvpade qucldrula) crabs are described, as revealed bv tests with pure tones. Three types of interneurons were present in all species: tonic, which fired for the duration of the stimulus; phasic, which fired briefly at the onset of stimulation; and inhibited, in which ongoing spontaneous activity was suppressed during stimulation. Spectral sensitivities of the cells differed among the species and were matched to the energy composition of the sounds. The combined properties of the cells were suited to resolve the most likely temporal differences between the sounds of each species: pulse repetition rate, sound duration, and interval between successive sounds. None of the cells coded tone frequency. The responses of all cells were suppressed during locomotion (walking) by the preparations. Finally, all interneurons were nonhabituating and in this respect resembled their functional analogues in cricket
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Sulfated glycosaminoglycans were isolated from 23 species of 13 phyla of invertebrates and characterized by their electrophoretic migration in three different buffer systems coupled with enzymatic degradation using bacterial heparinase, heparitinases and chondroitinase AC. Heparan sulfate is a ubiquitous compound present in all species analyzed whereas chondroitin sulfate was present in 20 species and heparin-like compounds in 12 species of the invertebrates. the heparin-like compounds were purified from the echinoderm Mellita quinquisperforata (sand dollar) and the crustacean Ucides cordatus (crab) with anticoagulant activities of 60 and 52 IU/mg, respectively. Degradation of these heparins with heparinase produced significant amounts of the trisulfated disaccharide typical of mammalian heparins. This was confirmed by C-13-NMR spectroscopy of the crab heparin. An updated phylogenetic tree of the distribution of sulfated glycosaminoglycans in the animal kingdom is also presented. (C) 2000 ...
Back to the question of whats going on here? The shore crabs did take up microplastics in both types of exposure, but residence time is the key. They were able to clear the microplastics they got through dietary means, but they were still trying to clear microplastics they took up during ventilation almost a month later. The authors constructed a model to explain the mechanism of the movement of the microplastics. They found that the crabs tended to exhibit an asymmetry in microplastic uptake in the gills, which they attributed to the pumping mechanism of the scaphognathite being more dominant on one side of the gill chamber. Also, the posterior gills have a larger surface area than the anterior gills so they are more likely to take up microplastics into their lamellae. The crabs were unable to dislodge the tiny particles by normal gill cleaning actions. It is interesting that no microspheres were found in the hemolymph at any of the sampling points in either experiment. That suggests that ...
FAQs on FW Crabs by Species: Halloween Crabs/(Gecarcinus sp.), Panther Crabs, Vampire Crabs/(Geosesarma Bicolor), Other real and purported Freshwater Crab species (Freshwater spider crab/Amarinus lacustris, Malawi Blue Crab (Potamonautes orbitospinus) Red Claw Crab/Perisesarma bidens, Red Thai Crab/Gecarcinus ruricola, Soapdish Crab/Cardisoma sp., Thai Micro Crabs/Limnopilos naiyanetri, Yellow Moon Crab/Geothelphusa albogilva, Freshwater to Brackish Crabs by Bob ...
When we examine the structure of our nervous system, we find out that all electrical impulses that it conducts are centralized in our brain. Therefore somewhere within the brain there must be the place, where the interaction between mind and physical world takes place. It is inside the brain, where the measurements of our perceptive organs take place. It is the place in the physical world, where observation occurs. In some way our mind is able to observe the electrical impulses from our nervous system. And by observing them, we control them. If we look at the biochemical processes that take place at the synapses, where the nerves touch each other and where information is transmitted, we get indeed into a range where quantum mechanics becomes relevant. What exactly occurs within the molecules of the biochemical transmitters that travel between the microscopic gaps of the synapses of our nerve cells does not follow the macroscopic determinism. Its outcome is non-deterministic and only limited by ...
First published in Alchemy Journal Volume 10; Number 1, 2009, Salamander & Sons. 1. How would you explain or define alchemy? Is alchemy the same as spagyrics? On a theoretical basis I was taught the concept that not only is Alchemy the Mother of all the Arts and Sciences but it is also the Art and Science of Evolution. Spagyrics is an archetypal process that is happening in nature continuously. It is in fact the cycle of life itself. Whatever you observe is either dissolving or coagulating, breaking down or building up. It is how Nature works and is so common that it is overlooked. It is also happening within everyone and on an external level, such as when a person separates from their domestic life, cohobates with work or some other aspect and at the end of the day again separates from to reunite with their other life. This is followed by a sleeping/waking cycle, again a separation and cohobation. All this produces barely perceptible changes in the individual such as aging, but could hardly be ...
Introduction: Intussusception is a condition in which part of the intestine slides into an adjacent part of the intestine. Intussusception is an important cause of an acute abdomen and the second most common cause of ...
The Louisiana Wildlife and Fisheries Commission has authority to prohibit the use of crab traps in state waters for a maximum 16 consecutive-day period between Feb. 1 - March 31 each year. Last summer the commission approved new regulations to extend the Louisiana blue-crab fishery closure to 30 days in February and March in 2017-2019 due to sustainability concerns. During this period, abandoned or old crab trabs can be removed and crabbing is prohibited to allow the Louisiana blue crab population to stabilize.. The Louisiana Blue Crab Task Force voted in early July to suggest changing the 30-day closure to a female-only closure in March and April after commercial crabbers expressed frustration with the February/March closure, a period when the price of crabs is high during the Lenten season. The date change will not be finalized until it passes through the Wildlife and Fisheries Commission. ...
bought land on Cumberland for a winter retreat. In 1884, they began building a mansion on the site of Dungeness, though Carnegie never lived to see its completion. Lucy and their nine children continued to live on the island, naming their mansion Dungeness after that of Greene. Dungeness was designed as a 59-room Scottish castle. They also built pools, a golf course, and 40 smaller buildings to house the 200 servants who worked at the mansion. The last time Dungeness was used was for the 1929 wedding of a Carnegie daughter. After the Crash and the Great Depression, the family left the island and kept the mansion vacant. It burned in a 1959 fire, believed to have been started by a poacher who had been shot in the leg by a caretaker weeks before. Today, the ruins of the mansion remain on the southern end of the island. The Carnegie family owned 90% of the island. ...
The Dungeness National Wildlife Refuge on Washingtons Olympic Peninsula is an incredible preserve for hiking, whale watching and experiencing the PNW.
Lasrick writes Alexis Madrigal at the Atlantic: The marvelous thing about horseshoe crab blood, though, isnt the color. Its a chemical found only in the amoebocytes of its blood cells that can detect mere traces of bacterial presence and trap them in inescapable clots. Madrigal continues, To t...
In matters of love, nothing says romance like a moonlit beach. Especially if youre a lusty horseshoe crab and the tide is high.
Fig 3. Live and dead semi-granular+granular cells (SGC+GC) and hyalinocyte cells (HC) for Chionoecetes bairdi, Tanner Crab. The upper region contains the semi-granular and granular cells, while the lower region contains the hyalinocytes. The error bars for the dead cells are negative, while the error bar for the live cells is positive. Different homogenous groups are labeled for only the dead cells since there was no significant difference in the number of total cells. - Ocean Acidification Affects Hemocyte Physiology in the Tanner Crab (Chionoecetes bairdi)
Full article: The mined, 14 Aug 2016 Nauru once possessed the worlds purest deposits of rock phosphate, the Without access to the soil nutrients of Nauru, Banaba and Christmas Island, out land with the aid of explosives and heavy crushing equipment, andResidual values of Australian rock phosphates, 1 Jan 1985 effectiveness of phosphorus from Christmas. Island C-grade ore, Calciphos, Duchess rock phosphate from Queensland and superphosphate. TheChristmas Island , , MiningLink, Christmas Island Phosphate Dust is Collected Along With the Phosphate Rock The fine particles created by the crushing, including the dust, is collected by.. ...
It turns out that the green crab is one of the most invasive species of our time. Like the fiendish zebra mussel, the green crab is capable of traveling by boat (either among barnacles or in ballast). As far back as the age of discovery they were hitching rides around the world on the hulls of wooden ships. The little crabs seem to have piggy backed into temperate climes along with the British Empire and they have set up ranges in Australia, South Africa, Argentina, and both coasts of North America. So far this has not been a big problem: for hundreds of years, cold waters and big hungry fish have kept the little crabs from proliferating. However as humankind moves forward with its dastardly plans to kill off every fish in the ocean (and as ocean temperatures rise) the crabs are beginning to flourish in places where they were once barely holding on by their claws.. ...
Another interesting fact is that Horseshoe Crabs are quite literally blue blood. Oxygen is carried in the blood of the Horseshoe Crab by a molecule that contains hemocyanin, which contains copper causing the blood to turn blue when exposed to air. Most red-blooded animals carry oxygen in iron-rich hemoglobin causing their blood to turn red when exposed to air. The larger female Horseshoe Crab can reach up to 60 centimeters in length and can weigh up to 5 kilograms. The horseshoe-shaped carapace (shell) is smooth and brown, although in some environments the carapace is covered with epiphytic plants and epizooic animals (organisms which live on the outer surface of other organisms and can grow so much that the carapace is no longer visible). This is usually observed toward the end of the Horseshoe Crabs lifespan of approximately 19 years. During its formative years, the Horseshoe Crab sheds its carapace periodically or molts to accommodate its growing body. The new skeleton is flexible so that ...
Baby Teething Gloves Nursing Pacifier Silicone Molar Mitten Infant Chain Nipples Anti-bite Hand Holder Stop Sucking Thumb Toy Material: PPType two: Teething GlovesType three: Molar Mitten Teething mittens best teether for baby This clever little teething mittens is made from flexible silicone for soft chew factor so
http://www.smh.com.au/national/rise-in-asio-complaints-linked-to-christmas-island-workload-20101014-16lwt.html ASIO is struggling under a deluge of immigration security checks, with complaints about the speed of vetting jumping by 563 per cent in a year, the nations intelligence watchdog says. The jump is believed to be due to the increased numbers of immigration detainees on Christmas Island - the government requires them to have security clearance cleared before moving them to the mainland. ASIO staff treat the Christmas Island cases as priorities and that has resulted in longer waiting times for other checks. The new Inspector-General of Intelligence and Security, Vivienne Thom, revealed in an annual report that there were 1015 complaints about delays in the last financial year, up from 153 for the preceding 12 months. We identified that there were increasing delays in ASIOs handling of security assessments, Dr Thom said. We held discussions with senior ASIO staff about the importance ...
nov., an ascomycete parasite of the tanner crab (Chionoecetes bairdi Rathbun Crustacea; Brachyura)". Can J Bot. 59 (11): 2121- ...
Crustacea, Brachyura, Calappidae) from the early Oligocene of the Ligure Piemontese Basin, Piedmont (NW Italy)". Neues Jahrbuch ... Decapoda, Brachyura, Varunidae) from the early Pleistocene of Bargiano, Terni (Umbria, central Italy)". Neues Jahrbuch für ... Crustacea, Brachyura, Cymonomidae) from the Eocene Llajas Formation, California (USA)". Neues Jahrbuch für Geologie und ... Decapoda, Brachyura, Raninidae) dell'Eocene superiore dei Monti Berici (Vicenza, Italia nordorientale)" (PDF). Studi Trentini ...
Brachyura. Pseudothelphusidae and Trichodactylidae". Catalogue of Crustacea of Brazil (Catálogo de Crustáceos do Brasil). Rio ...
Brachyura. Oslo: Universitetsforlaget. pp. 118-121. (Articles with short description, Short description is different from ...
The northern crombec (Sylvietta brachyura) is a species of African warbler, formerly placed in the family Sylviidae. It is ... BirdLife International (2016). "Sylvietta brachyura". IUCN Red List of Threatened Species. 2016: e.T103766614A94440694. doi: ...
Lunde, D.; Aplin, K. & Molur, S. (2016). "Hystrix brachyura". IUCN Red List of Threatened Species. 2016: e.T10749A11509929. ... brachyura LC Indian crested porcupine, H. indica LC Suborder: Sciurognathi Family: Castoridae (beavers) Genus: Castor Eurasian ...
The slaty spinetail or slaty castlebuilder, (Synallaxis brachyura), is a passerine bird which breeds in the tropical New World ... BirdLife International (2020). "Synallaxis brachyura". IUCN Red List of Threatened Species. 2020: e.T22702308A138173978. doi: ...
The word 'pitta' is derived from the Telugu language meaning 'small bird'. The specific name brachyura is a combination of the ... Erritzoe, J. (2016). "Indian Pitta (Pitta brachyura)". In del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliot, A.; Fishpool, L ... Donald, C. H. (1918). "The occurrence of the Indian Pitta Pitta brachyura in the Kangra District, Punjab". Journal of the ... The Indian pitta (Pitta brachyura) is a passerine bird native to the Indian subcontinent. It inhabits scrub jungle, deciduous ...
Lunde, D.; Aplin, K. & Molur, S. (2016). "Hystrix brachyura". IUCN Red List of Threatened Species. 2016: e.T10749A11509929. ... brachyura NT Javan mongoose, U. javanica LC Collared mongoose, U. semitorquata NT Crab-eating mongoose, U. urva LC Caniformia ... brachyura LC Thick-spined porcupine, H. crassispinis NT Genus: Trichys Long-tailed porcupine, T. fasciculata LC SubSciurognathi ...
Crustacea: Brachyura)". Zoologische Mededelingen. 80. (Articles with short description, Short description is different from ...
In the Río de la Plata region, the meat of P. brachyura is particularly prized and locally the species is called raya fina ( ... 1-33 Charvet-Almeida, P., Soto, J.M.R. & Pinto de Almeida, M. (2009). "Potamotrygon brachyura". IUCN Red List of Threatened ... Potamotrygon brachyura), which grow up to 1.5-1.6 m (4.9-5.2 ft) in disc width. At up to 220 kg (490 lb), by far the heaviest ... brachyura generally avoid lentic habitats, including the reservoirs created by river impoundment. In addition to the large ...
The black-chinned robin (Poecilodryas brachyura) is a species of bird in the family Petroicidae. It is found in northern New ... BirdLife International (2016). "Poecilodryas brachyura". IUCN Red List of Threatened Species. 2016: e.T22704869A93989385. doi: ...
Lunde, D.; Aplin, K. & Molur, S. (2016). "Hystrix brachyura". IUCN Red List of Threatened Species. 2016: e.T10749A11509929. ... brachyura LC Indian crested porcupine, H. indica LC Suborder: Sciurognathi Family: Sciuridae (squirrels) Subfamily: Ratufinae ...
Data related to Raja brachyura at Wikispecies Fishbase Database: Raja brachyura Wikimedia Commons has media related to Raja ... The blonde ray or blonde skate (Raja brachyura) is a species of ray fish in the family Rajidae. The Blonde ray lives in the ... "Raja brachyura". WoRMS. World Register of Marine Species. Retrieved 26 June 2021. Museum, British Columbia Provincial (26 June ... The body is kite-shaped with a short tail (hence the specific name brachyura, from Ancient Greek words meaning "short tail"). ...
"Pinnixa chaetopterana". Brachyura larvae. Zooplankton of the South Atlantic Ocean. Marine Species Identification Portal. ...
Lunde, D.; Aplin, K. & Molur, S. (2016). "Hystrix brachyura". IUCN Red List of Threatened Species. 2016: e.T10749A11509929. ... brachyura NT Javan mongoose, U. javanica LC Collared mongoose, U. semitorquata NT Family Ursidae (bears) Genus: Helarctos Sun ... brachyura LC Thick-spined porcupine, Hystrix crassispinis LC Sunda porcupine, Hystrix javanica LC Sumatran porcupine, Hystrix ...
Crustacea: Brachyura)". Zoologische Mededelingen. 80. (Articles with short description, Short description is different from ...
Later, Zonancistrus was described for D. brachyura, D. picta, and D. pulchra. However, this distinction was based on ... There are currently six recognized species in this genus: Dekeyseria amazonica Rapp Py-Daniel, 1985 Dekeyseria brachyura (Kner ... "PlanetCatfish::Cat-eLog::Loricariidae::Dekeyseria brachyura". 2006-01-28. Retrieved 2007-07-18. "PlanetCatfish::Cat-eLog:: ...
2015: 7. Lunde, D.; Aplin, K.; Molur, S. (2017) [errata version of 2016 assessment]. "Hystrix brachyura". IUCN Red List of ... Urva brachyura) (historical record is based on a specimen that is likely to have been an escapee) NT Family Viverridae (civets ... Hystrix brachyura (Mammalia: Rodentia: Hystricidae) in Singapore" (PDF). Nature in Singapore. 9: 63-68. Chua, Marcus A. H. (9 ... Hystrix brachyura) - Pulau Tekong, Pulau Ubin, Bukit Timah, Central Catchment, Western Catchment LC Family Tupaiidae ( ...
Charvet-Almeida, P.; Soto, J.M.R.; Pinto de Almeida, M. (2009). "Potamotrygon brachyura". IUCN Red List of Threatened Species. ... The short-tailed river stingray (Potamotrygon brachyura) is a species of river stingray (family Potamotrygonidae) native to the ... River Monsters, First Edition, Da Capo Press, 2011, p. 162 Species description of Potamotrygon brachyura at www.shark- ... Froese, Rainer; Pauly, Daniel (eds.) (2017). "Potamotrygon brachyura" in FishBase. January 2017 version. Oddone, M.C., G. ...
H. brachyura forages at night and rests during the day. It may be found singly or in pairs. It can also swim and gnaw. The sow ... 469-475 PDF Archived 2008-07-24 at the Wayback Machine Parr J W.K, (2003).East Asian Porcupine Hystrix Brachyura: From ... The Malayan porcupine or Himalayan porcupine (Hystrix brachyura) is a species of rodent in the family Hystricidae. Three ... 1995). Preference and Intake of Feedstuff by Crested Porcupines(Hystrix Brachyura) in Captivity. Ann Zootech 44, 271. Vaughan, ...
... brachyura (Vieillot, 1821) - south and east South Africa BirdLife International (2016). "Camaroptera brachyura". IUCN Red List ... The specific epithet brachyura is from the Ancient Greek brakhus for "short" and -ouros for "-tailed". There are five ... The green-backed camaroptera (Camaroptera brachyura), also known as the bleating camaroptera, is a small bird in the family ... was described by the French ornithologist Louis Jean Pierre Vieillot in 1821 under the binomial name Sylvia brachyura. The type ...
The pygmy antwren (Myrmotherula brachyura) is a species of bird in the family Thamnophilidae, the antbirds. It is found in ... Wikispecies has information related to Myrmotherula brachyura. Pygmy Antwren photo gallery VIREO Photo-High Res; Article ... BirdLife International (2016). "Myrmotherula brachyura". IUCN Red List of Threatened Species. 2016: e.T22733626A95060732. doi: ...
The genus name Chaetura is derived from the Greek khaite (hair) and oura (tail). The specific epithet brachyura is Greek for ... The short-tailed swift (Chaetura brachyura) is a bird in the Apodidae, or swift family. The species was first formally ... BirdLife International (2020). "Chaetura brachyura". IUCN Red List of Threatened Species. 2020: e.T22686725A168010927. doi: ... brachyura, the nominate subspecies, found from Panama to Trinidad and the Guianas, south to west-central Brazil and northern ...
Lunde, D.; Aplin, K. & Molur, S. (2016). "Hystrix brachyura". IUCN Red List of Threatened Species. 2016: e.T10749A11509929. ... brachyura LC Suborder: Sciurognathi Family: Sciuridae (squirrels) Subfamily: Ratufinae Genus: Ratufa Black giant squirrel, ...
Lunde, D.; Aplin, K. & Molur, S. (2016). "Hystrix brachyura". IUCN Red List of Threatened Species. 2016: e.T10749A11509929. ... brachyura LC Suborder: Sciurognathi Family: Sciuridae (squirrels) Subfamily: Ratufinae Genus: Ratufa Black giant squirrel, R. ...
2003). "Homidiana brachyura". The Global Lepidoptera Names Index. Natural History Museum. Retrieved May 14, 2018. Beccaloni, G ... Homidiana brachyura Hampson, Novit. Zool. 25:373 (originally in Coronidia subg. (Homidiana)) Homidiana briseis (Westwood, 1879 ...
Ixora brachyura Bremek. Ixora bracteolaris Müll.Arg. Ixora bracteolata Craib Ixora brandisiana Kurz Ixora brassii S.Moore Ixora ...
ISBN 978-0-521-30690-4. R. W. Ingle (1997). "True crabs (Brachyura)". Crayfishes, Lobsters, and Crabs of Europe: an Illustrated ... Rosenberg, Michael S. (2019). "A fresh look at the biodiversity lexicon for fiddler crabs (Decapoda: Brachyura: Ocypodidae). ... Brachyura), Based on phylogenetic relationships, With a reorganization of subfamily rankings and a review of the taxonomic ...
R. W. Ingle (1997). "True crabs (Brachyura)". Crayfishes, Lobsters, and Crabs of Europe: an Illustrated Guide to Common and ... Brachyura), two new records for the Turkish Black Sea fauna" (PDF). Turkish Journal of Zoology. 23: 115-118. Archived from the ... Brachyura: Varunidae) based on the 16S rRNA gene". Hydrobiologia. 449 (1-3): 41-46. doi:10.1023/A:1017564229866. S2CID 22915472 ... Brachyura)" (PDF). Proceedings of the Biological Society of Washington. 91 (3): 691705.{{cite journal}}: CS1 maint: uses ...
Tephritis brachyura is a species of tephritid or fruit flies in the genus Tephritis of the family Tephritidae. Ukraine & South ...
SPECIES brachyura SUBSPECIES Hystrix (Acanthion) brachyura brachyura ...
Synallaxis brachyura Lafresnaye, 1843. Taxonomic Serial No.: 563222 (Download Help) Synallaxis brachyura TSN 563222 ...
Kundenbewertungen zu Masdevallia brachyura. Anzahl der Bewertungen: 1. Durchschnittliche Bewertung: 5 Eigene Bewertung ...
... Dataset homepage ... Naruse T, plazi (2019). Revision of the shell-carrying crab genus Conchoecetes Stimpson, 1858 (Crustacea: Brachyura: Dromiidae ... Brachyura: Dromiidae). Zootaxa 4706 (1): 1-47, DOI: https://doi.org/10.11646/zootaxa.4706.1.1 Taxonomic Coverages. Geographic ...
AfReMaS (2022). Brachyura. Accessed at: https://www.marinespecies.org/afremas/aphia.php?p=taxdetails&id=106673 on 2022-09-26 ... Brachyura. Accessed at: https://marinespecies.org/afremas/aphia.php?p=taxdetails&id=106673 on 2022-09-26 ...
Brachyura of the North-Sea. There are 55 species of Brachyura that are commonly found in the North-Sea.. Information on the COI ... Brachyura of the North-Sea. Taxa Name. Taxa. Level. Barcode. Data?. Number of. Barcodes. from. any ocean. Number of. Barcodes. ...
... Dataset homepage ... Brachyura, Potamoidea, Potamonautidae). Zootaxa 3884 (1): 65-72, DOI: http://dx.doi.org/10.11646/zootaxa.3884.1.5 Taxonomic ... Brachyura, Potamoidea, Potamonautidae). Plazi.org taxonomic treatments database. Checklist dataset https://doi.org/10.11646/ ...
In: Castro, P., P.J.F. Davie, P.K.L. Ng & B. Richer de Forges (eds.). Studies on Brachyura: A Homage to Danièle Guinot. ... Laurie, R.D. (1906). Report on the Brachyura collected by Professor Herdman, at Ceylon, in 1902. Report to the Government of ... Kumar, B.A., M.S. Kumar & B.S. Galil (2013). Calappid and leucosiid crabs (Crustacea: Decapoda: Brachyura) from Kerala, India, ... First record of the Two-striped Box Crab Calappa bilineata Ng, Lai & Aungtonya, 2002 (Brachyura: Calappidae) from St. Martin’ ...
Crustacea: Brachyura). Zoologische Medelingen, Leiden 79(2): 41. Galil, B.S. & P.L. Ng (2015). Leucosiid crabs from Papua New ... Lai, J.C.Y., B.P. Thoma, P.F. Clark, D.L. Felder & P.K.L. Ng (2013). Phylogeny of eriphioid crabs (Brachyura, Eriphioidea) ... Ng, P. K. & H. Komatsu (2016). Nursia tohae, a new species of coral rubble mimic crab (Crustacea: Brachyura: Leucosiidae) from ... N. 2. The brachyura oxystomata. Journal of the Asiatic Society, Bengal, 65(2): 134-296. ...
Brachyura, Potamonautidae) currently includes four endemic Cameroonian freshwater crab species whose phylogenetic relationships ...
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Retrieved from "https://species.wikimedia.org/w/index.php?title=Raja_brachyura&oldid=8424853" ...
IRMNG (2021). Pontella brachyura (Kroyer, 1849). Accessed at: https://www.irmng.org/aphia.php?p=taxdetails&id=11840522 on 2022- ...
Tax_name Report for: Brachyura. 14 Alpha/beta hydrolase fold proteins are known to date in Brachyura. 10 fragments are known to ...
Olympus E-M1 Mark Ii Macro Brown Yellow Olympus 300Mm F4 Pro Brachyura Krab Texel ...
Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting tail (abdomen) (Greek ...
... DE: Eikapsel Blondrochen EN: Blonde ray egg case NL: Blonde rog eikapsel ...
Hystrix brachyura. , Carolus Linnaeus, 1758. The Malayan porcupine or Himalayan porcupine (Hystrix brachyura) is a species of ... H. brachyura is nocturnal. It forages at night and rests during the day. It may be found singly or in pairs. It can also cans ... Range map of Hystrix brachyura in Thailand. About our range maps. Our range maps are based on limited data we have collected. ...
Two brachyuran species of the families Dynonemidae and Iphiculidae are reported from red coral beds in northern Taiwan. The dynonemid Acanthodromia margarita (Alcock, 1899) has hitherto been reported from the Andaman Sea, Japan, and Philippines and the species is here recorded for the first time from Taiwan. A new species of iphiculid, Pariphiculus stellatus sp. n., is also described. The new Pariphiculus, which also occurs in the Philippines, is superficially similar to P. agariciferus Ihle, 1918, a species known from Indonesia, Japan, Philippines, South China Sea, Taiwan, and Vanuatu, but can be distinguished by distinct carapace, pleonal and male first gonopod features.
Hermit Crabs and True Crabs (Anomura-Brachyura). Weve got some unusual crustaceans in Hawaiian waters--Anemone crabs and ...
Feeding habits of the swimming blue crab Portunus segnis (Forskål, 1775) (Brachyura: Portunidae) in.... May 2019 · Journal of ... Reproductive biology of the blue swimming crab Portunus segnis (Forskål, 1775) (Brachyura: Portunida.... March 2022 · African ... Reproductive biology of the blue swimming crab Portunus segnis (Forskål, 1775) (Brachyura: Portunidae) in the Gulf of Gabes ( ...
McLay, C. L. Brachyura and crab-like Anomura of New Zealand. Leigh Lab. Bull. 22, 463 (1988). ... Alkaladi, A. & Zeil, J. Functional anatomy of the fiddler crab compound eye (Uca vomeris: Ocypodidae, Brachyura, Decapoda). J. ... Green, P. T. Field observations of moulting and moult increment in the red land crab, Gecarcoidea natalis (Brachyura, ...
... Bulletin of the ... Schweitzer, C., Feldmann, R., González-Barba, G., & Ćosović, V. (2006). New Decapoda (Anomura, Brachyura) from the Eocene ... "New Decapoda (Anomura, Brachyura) from the Eocene Bateque and Tepetate Formations, Baja California Sur, México". Bulletin of ... New Decapoda (Anomura, Brachyura) from the Eocene Bateque and Tepetate Formations, Baja California Sur, México ...
Blonde ray (Raja brachyura). Thornback ray (Raja clavata). Small-eyed ray (Raja microocellata). ...
Reproductive biology and relative growth in the spider crab Maja crispata (Crustacea: Brachyura: Majidae) Authors. * Carlos A. ... Crustacea, Brachyura, spider crabs, Maja crispata, reproduction, relative growth, Mediterranean Sea Abstract. A series of life- ... Reproductive biology and relative growth in the spider crab Maja crispata (Crustacea: Brachyura: Majidae). scimar [Internet]. ... Brachyura: Majidae) in five biotopes in a Thalassia complex , Scientia Marina: Vol. 71 No. 1 (2007) ...
From: Description of a new genus and new species of freshwater crab (Brachyura: Gecarcinucidae) from the Western Ghats, Kerala ...
  • This dataset contains the digitized treatments in Plazi based on the original journal article Meyer, Kirstin S., Cumberlidge, Neil, Koppin, Jennifer C. (2014): A new genus and species of freshwater crab from Madagascar (Decapoda, Brachyura, Potamoidea, Potamonautidae). (gbif.org)
  • On a collection of calappoid and leucosioid crabs (Decapoda, Brachyura) from Vanuatu, with description of a new species of Leucosiidae, pp. 139â€"152. (threatenedtaxa.org)
  • Phylomitogenomics reconfirm the phylogenetic position of the genus Metaplax inferred from the two grapsid crabs (Decapoda: Brachyura: Grapsoidea). (threatenedtaxa.org)
  • Ocypodidae, Brachyura, Decapoda). (nature.com)
  • Crabs (Arthropoda: Crustacea: Decapoda: Brachyura). (epa.gov)
  • Crustacea: Malacostraca: Eucarida (Part 2): Decapoda - Anomura, Brachyura. (cmar.csiro.au)
  • Crustacea: Decapoda: Brachyura: Xanthidae). (sinica.edu.tw)
  • Ornamental crabs of the genus Mithraculus (Decapoda: Brachyura: Majidae) are utilized in reef aquaria to control nuisance algae, particularly bubble algae. (nova.edu)
  • This study investigates the predatory behaviour of Cancer novaezelandiae (Decapoda : Brachyura : Cancridae), a subtidal crab from Lyttelton Harbour, Banks Peninsula. (canterbury.ac.nz)
  • Can Larvae Produced From Stored Sperm in the Ornamental Crab Mithraculus forceps (A. Milne Edwards, 1875) (Decapoda: Brachyura: Majidae) Be Used in Aquaculture? (nova.edu)
  • Parapanope De Man, 1895 (Decapoda: Brachyura: Pilumnoidea: Galenidae): Revisited and Revised, with Descriptions of Two New Species. (edu.bn)
  • This dataset contains the digitized treatments in Plazi based on the original journal article Naruse, Tohru (2019): Revision of the shell-carrying crab genus Conchoecetes Stimpson, 1858 (Crustacea: Brachyura: Dromiidae). (gbif.org)
  • The Calappidae (Crustacea: Brachyura) of Chinese waters, pp: 675â€"704. (threatenedtaxa.org)
  • Chen, H.-L. & Sun, H.-B. (2002) Fauna Sinica Invertebrata (vol 30): Arthropoda Crustacea: Brachyura: Marine primitive crabs. (threatenedtaxa.org)
  • Carmona-Suárez CA. Reproductive biology and relative growth in the spider crab Maja crispata (Crustacea: Brachyura: Majidae). (csic.es)
  • On the association between the crab Hapalonotus reticulatus (Crustacea, Brachyura, Eumedonidae) and the sea cucumber Holothuria (Metriatyla) scabra (Echinodermata, Holothuridae). (naturalsciences.be)
  • Home / RBINS Publications / Bulletin of the Royal Belgian Institute of Natural Sciences - Biology / Bulletin of the Royal Belgian Institute of Natural Sciences - Biology / On the association between the crab Hapalonotus reticulatus (Crustacea, Brachyura, Eumedonidae) and the sea cucumber Holothuria (Metriatyla) scabra (Echinodermata, Holothuridae). (naturalsciences.be)
  • Crustacea: Stomatopoda and Brachyura. (shadysidebooks.com)
  • Revision of the spider crab genus Maja Lamarck, 1801 (Crustacea: Brachyura: Majoidea: Majidae), with descriptions of seven new genera and 17 new species from the Atlantic and Indo-West Pacific. (gabrielpaladino.com)
  • True crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (Greek: βραχύ/brachy = short, ουρά/οura = tail), or where the reduced abdomen is entirely hidden under the thorax. (treknature.com)
  • For example, my favorite group, the true crabs (Brachyura), are often most easily identified from the carapace, eyes, claws, and back legs, and when certain species look nearly identical at a passing glance, it is best to catch these diagnostic characteristics at multiple angles. (inaturalist.org)
  • They include familiar arthropods such as lobsters (NEPHROPIDAE), crabs (BRACHYURA), shrimp (PENAEIDAE), and barnacles (THORACICA). (bvsalud.org)
  • Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail", usually hidden entirely under the thorax. (pbonlife.com)
  • Tephritis brachyura is a species of tephritid or fruit flies in the genus Tephritis of the family Tephritidae. (wikipedia.org)
  • Sobre la presencia de \i Raja brachyura \i0 Lafont (Rajiformes: Rajidae) en el Mar Catalán. (uab.cat)
  • To this class, to the class that hide their light under a bushel, the beautiful Indian pitta ( Pitta brachyura) belongs. (dictionary.com)
  • The Malayan porcupine or Himalayan porcupine (Hystrix brachyura) is a species of rodent in the family Hystricidae. (thainationalparks.com)
  • Ndaʼałkaahí dóó ééʼdeetįįhii éí "Hystrix brachyura" deiłníigo dayózhí. (wikipedia.org)
  • Geographic distribution of the short-tailed river stingray (Potamotrygon brachyura): assessing habitat loss and fishing as threats to the world's largest obligate freshwater elasmobranch. (columbia.edu)
  • Scientists in Taiwan threw in the towel this week on the Formosan clouded leopard ( Neofelis nebulosa brachyura) , a subspecies of big cat native to the island. (smithsonianmag.com)
  • Nous avons examiné 149 crabes marbrés, Pachygrapsus marmoratus , en provenance de la côte du Portugal à la recherche de parasites. (parasite-journal.org)
  • The Short-tailed Swift ( Chaetura brachyura ) is a bird in the Apodidae, or swift family. (blogspot.com)
  • Pictures available for Potamotrygon brachyura . (mnhn.fr)
  • The decapod fauna (Axiidea, Anomura, Brachyura) from the Late Pleistocene of Trumbac? (scienzenaturali.org)
  • and the snakes Platyceps gracilis (Günther), Coronella brachyura (Günther), and Psammophis longifrons Boulenger. (reptarium.cz)
  • Peter is currently a major contributor, and official subject editor for the Brachyura, for the World Register of Marine Species (WoRMS), a major web-based database delivering the most up-to-date, validated, taxonomic listings of marine animals. (qld.gov.au)
  • The complete mitochondrial genome of Calappa bilineata: The first representative from the family Calappidae and its phylogenetic position within Brachyura. (semanticscholar.org)
  • Notes on the foraging strategies of the giant robber crab Birgus latro (Anomala) on Christmas Island: Evidence for active predation on red crabs Gecarcoidea natalis (Brachyura). (mpg.de)
  • Comparative brain architecture of the European shore crab Carcinus maenas (Brachyura), the common hermit crab Pagurus bernhardus (Anomura) with notes on other marine hermit crabs. (mpg.de)
  • Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen), usually hidden entirely under the thorax. (trekearth.com)
  • Brachyura (crabs). (go.jp)
  • They fall in the Infraorder Brachyura and are considered true crabs. (seaunseen.com)
  • For example, my favorite group, the true crabs (Brachyura), are often most easily identified from the carapace, eyes, claws, and back legs, and when certain species look nearly identical at a passing glance, it is best to catch these diagnostic characteristics at multiple angles. (inaturalist.org)
  • What are the Brachyura (crabs) living with echinoderms? (free.fr)
  • Molecular phylogeny of enigmatic Caribbean spider crabs from the Mithrax-Mithraculus species complex (Brachyura: Majidae: Mithracinae): ecological diversity and a formal test of genera monophyly. (ufrj.br)
  • Cancer crabs or True Crabs (Brachyura) are dorsoventrally (top to bottom) flattened crabs with an oval outline. (husfarm.com)
  • There are almost 7000 species of true crabs (infraorder Brachyura), most of which inhabit the marine realm, but about 850 species live in freshwater or are terrestrial or semi-terrestrial. (mapoflife.org)
  • This is evidently a first-class design, because it has evolved at least five times independently amongst the decapod crustaceans , once in the Brachyura and four times in the Anomura (the group that includes the hermit crabs). (mapoflife.org)
  • While not too distantly related, hermit crabs and king crabs belong to the taxonomical infraorder Anomura, while "true" crabs like fiddler crabs and blue crabs are part of the taxonomical infraorder Brachyura. (nintendowire.com)
  • This dataset contains the digitized treatments in Plazi based on the original journal article van der Meij, Sancia E. T. (2015): A new gall crab species (Brachyura, Cryptochiridae) associated with the free-living coral Trachyphylliageoffroyi (Scleractinia, Merulinidae). (gbif.org)
  • Revised distribution of the African freshwater crab genus Deckenia Hilgendorf, 1868 (Brachyura, Potamoidea, Deckeniidae). (nmu.edu)
  • Host use of the elkhorn coral crab Domecia acanthophora (Brachyura : Domeciidae), with a phylogeny of the genus. (dcnanature.org)
  • Effect of starvation during late megalopa stage of Mithraculus forceps (Brachyura: Majidae) on larval duration, synchronism of metamorphosis, survival to juvenile, and newly metamorphosed juvenile size. (csic.es)
  • Morphological and Molecular Comparison of Hemigrapsus crenulatus (Milne Edwards, 1837) (Brachyura: Varunidae) from New Zealand and Chile: Was Miss Rathbun Right? (bioone.org)
  • Kampouris , T . E., Porter, J. S., Sanderson, W. S. (2019) Calli nectes sapidus Rathbun, 1896 (Brachyura: Portunidae): An assessment on its diet and foraging behaviour, Thermaikos Gulf, NW Aegean Sea, Greece: Evidence for ecological and economic impacts. (hw.ac.uk)
  • Algunos aspectos poblacionales de la jaiba azul (Callinectes sapidus Rathbun 1896) en un centro productor de jaiba suave en la Isla del Carmen. (una.ac.cr)
  • The Formosan clouded leopard (Neofelis nebulosa brachyura), which was thought to have been extinct for years was recently seen by a number of witnesses in the jungles of southeast Taiwan. (anonews.co)
  • Taxonomic studies on the Brachyura larvae of the PERSIAN GULF are relatively few. (sid.ir)
  • Brachyura of the Pacific coast of America. (vliz.be)
  • The Pygmy Antwren ( Myrmotherula brachyura ) is a species of bird in the Thamnophilidae family, the antbirds. (kiwifoto.com)
  • WoRMS Brachyura: World List of marine Brachyura (version 2015-09-01). (wikipedia.org)