ゴンズイの酸素消費量および成長に対する群の影響〔魚の生理生態現象に対する群の影響-3-〕

概要

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Oxyen consumption of the catfish eel Plotosus anguillaris was lower in fish of a group of 6 or 10 fish than in an isolated one. Mirror images did not lower oxyen consumption of an isolated fish. Group effect on oxygen consumption still existed in the dark. Oxygen consumption of an isolated fish in conditioned water introduced after flow through a container of 15 fish was lower than that of an isolated fish in fresh, unconditioned water, but still higher than that of fish in an actual group of 10 fish in fresh, unconditioned water. Oxygen consumption of an isolated fish was higher in fish which had been kept in a group of 5 or 10 fish before experimentation than in those which had been kept separately. Fish in a group of 5 or 10 fish ingested larger amount of feed during one hour after feeding and showed larger increment of weight during 18 days than an isolated fish.
日本水産學會の論文