Results 161 to 170 of about 43,756 (197)

Shell Disease of Ostrea edulis L.

Nature, 1967
SHELL disease on native oysters in Britain initially became established in Essex1. It is now well established there and is present in natives in beds at Whitstable and in Cornwall. It has also been found in Clew Bay, Eire (unpublished report by C. Duggan to Irish Fisheries Department).
D. J. ALDERMAN, E. B. GARETH JONES
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Growth and Metabolism of Ostrea edulis Larvae

Nature, 1973
ONLY a fraction of the plant food captured by zooplankton is converted into growth ; the rest is lost through incomplete assimilation, excretion and metabolism. The net growth efficiencies, K2 (percentage of assimilated food converted into growth) for haloplanktonic animals such as Calanus and related copepod species are generally lower than the ...
P. A. GABBOTT, D. L. HOLLAND
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An evaluation of anaesthetics for Ostrea edulis (L.)

Aquaculture, 1992
Abstract An effective anaesthetic for oysters was sought, in order to allow for experimental manipulation of live oysters with minimal stress. A range of anaesthetics commonly used with gastropods and cephalopods, as well as a fish anaesthetic, were tested. Most of the chemicals tested were found to be unsuitable for oysters.
Sarah C. Culloty, Maire F. Mulcahy
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Metamorphosis of the Larva of Ostrea edulis

Nature, 1937
ALTHOUGH we now have a complete description of the fully-developed larva1 of the European oyster (Ostrea edulis), we have as yet no account of the metamorphosis which takes place when the larva attaches itself and becomes the settled spat. The smallest spat yet described is that figured by Yonge2 The shell of this individual measured 1.2 mm., whereas ...
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Transport of naphthalene in the oyster Ostrea edulis

Marine Biology, 1981
In small oysters (Ostrea edulis), transport of naphthalene between tissues is primarily by diffusion and not via the circulatory system. In intact oysters, accumulation in the adductor muscle and body followed accumulation in the gills after a large lag-time.
R. T. Riley, M. A. Shirazi, R. C. Swartz
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Potential resistance of a number of populations of the oyster Ostrea edulis to the parasite Bonamia ostreae

Aquaculture, 2004
Abstract The study investigated the susceptibility of a number of European populations of Ostrea edulis to the protistan parasite Bonamia ostreae . The study was carried out at oyster-growing regions in three European countries where Bonamia is endemic.
S.C Culloty, M.A Cronin, M.F Mulcahy
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The fecundity of Ostrea edulis

Journal of the Marine Biological Association of the United Kingdom, 1941
It is shown that the average number of embryos produced by a gravid oyster is approximately doubled each year until the oyster is 4 years old, when it may be regarded as adult. Estimates have been made of the quantities of embryos produced by one 1-year-old, eleven 2-year-old, fourteen 3-year-old and twenty-two adult oysters; the mean values for these ...
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Primary Sex-Phases in Ostrea edulis.

Journal of Cell Science, 1942
ABSTRACT 1. It is only under the most favourable conditions that oysters (Ostrea edulis) mature in the first sexual phase in the same season as that in which they attach themselves. During this initial phase the oyster functions as a male. 2.
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Efficiency of diagnostic techniques for the parasite, Bonamia ostreae, in the flat oyster, Ostrea edulis

Aquaculture, 2008
Bonamia ostreae is the causative agent of the disease bonamiosis, which has depleted stocks of the European flat oyster, Ostrea edulis, since the parasite was introduced into Europe in the late 1970s. Accurate, sensitive and rapid diagnostic techniques are essential in the detection of B.
S.A. Lynch, M.F. Mulcahy, S.C. Culloty
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On the Nature and Functions of the Amoebocytes of Ostrea edulis

Journal of Cell Science, 1934
ABSTRACT There are two kinds of corpuscles in the blood of the oyster; one consists of granular, the other of hyaline amoebocytes. The granular amoebocytes are amoeboid, though the speed of their movement is slow. The granules are yellow or yellowish green in the fresh condition.
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