Seasonal changes in feeding rate, digestive enzyme activity, and assimilation efficiency of Calanus pacificus
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چکیده
منابع مشابه
Effects of Size and Concentration of Food Particles on the Feeding Behavior of the Marine Planktonic Copepod Calanus Pacificus
When adult females of Calanus pacificus are fed on monospecific cultures of centric diatoms which grow as single cells, a predictive relationship is found between feeding behavior of the copepods and size and concentration of food particles. Ingestion rate of copepods increases linearly with cell concentration up to a maximal rate. This maximal ingestion rate, expressed as carbon, is the same f...
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هدف از آزمایش اول بررسی اثر سطوح مختلف سریسین [0 (control), 0.1, 0.5, 1.0, 2.5 %] افزوده شده به محیط , ivm بر cumulus cell expansion، بلوغ هسته و توسعه متوالی جنین، در گوسفندان نژاد سنجابی در فصل تولید مثلی می باشد. از سرگیری میوز به وسیله خارج شدن اولین پولار بادی اندازه گیری و هم چنین درصد رسیدن جنین های دو سلولی به مرحله کلیواژ و بلاستوسیت نیز به عنوان نشانه ای از میزان شایستگی توسعه اولیه ج...
Chlorophyll a degradation by Calanus pacijicus: Dependence on ingestion rate and digestive acclimation to food resources
Relative extents of Chl a degradation by Calanus pacificus were determined with ratios of a conservative tracer, 68Ge, to Chl a-derived pigment. The extent to which Chl a is degraded to colorless products can vary with food acclimation and ingestion rate. The fraction of ingested Chl a degraded by copepods acclimated to a high food concentration (4,000 cells ml-l Thalassiosira weissjlogii) for ...
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Enzyme efficiency was investigated in the lipase-catalyzed hydrolysis of canola oil in supercritical carbon dioxide (SCCO2). Immobilized lipase from Mucor miehie (Lipozyme IM) was used as the catalyst and the results showed that enzyme efficiency dropped at high pressures indicating a possible change in enzyme microstructure. Therefore, scanning electron microscopy (SEM) was used...
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Patterns of seasonal activity and density of host-seeking western blacklegged ticks, Ixodes pacificus, were investigated in central and southern California. Weekly to monthly drag sampling was undertaken at two sites in Santa Barbara County and one site in Los Angeles County over multiple years. Adult I. pacificus became active in the winter (late November) and were rare or absent by late April...
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ژورنال
عنوان ژورنال: Marine Ecology Progress Series
سال: 1990
ISSN: 0171-8630,1616-1599
DOI: 10.3354/meps062203