塩化水銀(2)液中のキンギョの生存時間に対する魚の密度および個体数の影響〔魚の生理生態現象に対する群の影響-5-〕

概要

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Difference in flsh density had little influence on survival time of goldfish in sublimate solution. This seemed to have been attributable to the counteraction of decreased sublimate concentration against increased contact with sublimate due to increased gill ventilation in higher density groups. The increased gill ventilation was estimated from decreased levels of ambient oxygen. When kept in the same density, grouped fish survived significantly longer than isolated ones. As the grouped fish were usually more tranquil than the isolated ones, they consumed less oxygen per body weight than the isolated ones. This decrease in oxygen consumption, the group effect, is considered to result in decreased gill ventilation and also in decreased contact with sublimate. These are thought to have made the grouped fish survive longer.
日本水産學會の論文