Results 191 to 200 of about 30,289 (262)

Experimental hexamitiasis in the oyster Crassostrea virginica

Journal of Invertebrate Pathology, 1968
Abstract In vitro growth characteristics of Hexamita sp. and course of experimental hexamitiasis initiated in oysters via the oral and intracardial route were used in an attempt to analyze the controversial issue of whether Hexamita is an oyster pathogen.
S Y, Feng, L A, Stauber
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Induced Adhesion in Crassostrea virginica Larvae

Science, 1975
Normal motile veliger larvae of the oyster, Crassostrea virginica , were observed swimming in pairs or trios. Adhesion between animals is firm and has a specific orientation. This adhesion can be induced in low frequencies by culturing larvae at high densities, and in much higher frequencies by inclusion of an ...
R, Ukeles, W E, Rose
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Immunological capabilities of the oyster Crassostrea virginica

Comparative Biochemistry and Physiology, 1969
Abstract 1. 1. The oyster Crassostrea virginica was found to clear secondary injections of T2 bacteriophage more rapidly than primary injections. 2. 2. The clearance rates, however, were not as pronounced as in the lemon shark, Negaparion brevirostris . 3. 3.
R T, Acton, E E, Evans, J C, Bennett
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Nitrogen excretion of Crassostrea virginica

Comparative Biochemistry and Physiology, 1966
Abstract 1. Water in which groups of 6 oyster, Crassostrea virginica , had been held for 24 hr was analyazzed by standards methods for nitrogenous excretion products. 2. Results of the most complete analysis, expressed as μmoles ammonia/100g oyster/day, were: ammonia 12·50, urea 2·2.54, amino acids 1·01, unidentified 3·20, total 19·25.
C.S. Hammen, H.F. Miller, Wm.H. Geer
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Polyspermy inhibition in the oyster, Crassostrea virginica

Journal of Experimental Zoology, 1983
AbstractInhibition of polyspermy is a critical response during fertilization which ensures that only one sperm nucleus will fuse with the female pronucleus to restore the diploid state. Oyster (Crassostrea virginica) eggs prevent polyspermy by a process occurring at the cell surface.
M C, Alliegro, D A, Wright
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Aconitase from the oyster Crassostrea virginica

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1982
1. The presence of aconitase activity in the oyster. Crassostrea virginica, has been demonstrated. 2. Low levels of activity were found in the different tissues with highest level in digestive diverticular and lowest level in muscle. 3. The conversion of both citrate and iso-citrate to cis-aconitate suggests the presence of an enzyme system capable of ...
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A cDNA Microarray for Crassostrea virginica and C. gigas

Marine Biotechnology, 2007
The eastern oyster, Crassostrea virginica, and the Pacific oyster, C. gigas, are species of global economic significance as well as important components of estuarine ecosystems and models for genetic and environmental studies. To enhance the molecular tools available for oyster research, an international group of collaborators has constructed a 27,496 ...
Jenny, Matthew J, Chapman, Robert W, Mancia, Annalaura, Chen, Yian A, Mckillen, David, Trent, Hal, Lang, Paul, Escoubas, Jean-Michel, Bachere, Evelyne, Boulo, Viviane, Liu, Z John, Gross, Paul S, Cunningham, Charles, Cupit, Pauline M, Tanguy, Arnaud, Guo, Ximing, Moraga, Dario, Boutet, Isabelle, Huvet, Arnaud, de Guise, Sylvain, Almeida, Jonas S, Warr, Gregory W   +21 more
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Short‐term heat stress impairs testicular functions in the American oyster, Crassostrea virginica: Molecular mechanisms and induction of oxidative stress and apoptosis in spermatogenic cells

Molecular Reproduction and Development, 2019
Global temperature is increasing due to anthropogenic activities. Abnormal temperature has devastating effects on growth, reproduction, and development of aquatic organisms.
Sarah Nash, Md Saydur Rahman
semanticscholar   +1 more source

Fertilization Interference Between Crassostrea ariakensis and Crassostrea virginica: A Gamete Sink

Journal of Shellfish Research, 2008
Published data indicate that spawning seasons for the Asian oyster Crassostrea ariakensis and the eastern oyster C. virginica overlap. Hybrids can form, but the larvae are not viable. If C. ariakensis is introduced into Chesapeake Bay and synchronous spawning occurs with native C.
David Bushek, Andrea Kornbluh, Haiyan Wang, Ximing Guo, Gregory Debrosse, John Quinlan   +5 more
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Crassostrea virginica grazing on toxic and non-toxic diatoms

Toxicon, 2010
Despite high abundances of toxic Pseudo-nitzschia spp. over Louisiana oyster beds (Crassostrea virginica; eastern oyster) there have been no documented cases of amnesic shellfish poisoning (ASP) in the state. Two possible explanations are that oysters do not readily feed on long pointed chains of Pseudo-nitzschia cells or they discriminate against ...
A E, Thessen, T M, Soniat, Q, Dortch, G J, Doucette   +3 more
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