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Abstract ▼ AI-Helper

To study on feeding behavior of copepods, Calanus sinicus and Acartia clausi(A. omorii), variations of filtering rate and rate of food intake with the changes of phytoplankton concentrations and time progress were measured in laboratory. Filtering rates of the two species of copepod declined with in...

To study on feeding behavior of copepods, Calanus sinicus and Acartia clausi(A. omorii), variations of filtering rate and rate of food intake with the changes of phytoplankton concentrations and time progress were measured in laboratory. Filtering rates of the two species of copepod declined with increasing of the food concentration and the averaging filtering rates C. sinicus and A. clausi were 2.42m/ copepod/hr., 3.37 ml/copepod/hr. respectively. And the rates of food intake increased with food concnetration up to a critical concentration. At higher concentrations, the rates of food intake were somewhat variable but kept the constance levels. Filtering rates of copepods with time progress didn't show diel feeding rythms and generally decreased. But filtering rate of A. Clausi increased by the increment of feeding in a few hours. consequently, two copepods showed similar tendency in the rate of food intake and filtering rate with phytoplankton concentrations. However, the measured values appeared differently. And the two species of copepod with time progress showed the non-continuous feeding behavior.