A study of feeding behaviour in Temora longicornis (Müller) (Crustacea:Copepoda)
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AbstractThe feeding behaviour of Temora longicornis (Müller) was studied using a suction restraint technique in large volumes of sea water. Observations and records were made with a video-tape recorder and Temora cephalic limb beat movements recorded with a micro-impedance pneumograph. The classical copepod feeding swirls, shown for other calanoid copepods, were shown to be artefacts of the constraints imposed by small volumes of sea water. No feeding swirls were seen when sea water flowed past the animals at a speed equivalent to that of slow swimming by copepods. Food particles were brought to the restraining surfaces of the cephalic appendages from in front, and not behind, the maxillipedes. Female T. longicornis were shown to increase their limb beat frequency and amplitude when presented with patches of the diatom Skeletonema. Such an increase in limb beat movement would suggest that Temora could adjust its feeding speed to the availability of algal food in the sea water.

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