グッピーにおける摂食行動の社会的促進 : III.社会的促進と運動・呼吸・生長との関係

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The amount of activity of the guppy. Poecilia reticulata PETERS, was measured, for 10 minutes under four different conditions, vix, under different numbers of stimulators-0,1,3 and 6. The oxygen consumption, which was taken as a degree of respiration, was measured under 0,1 and 3 stimulators for 2 hrs. The single, 2 and 4 individuais of guppy were put into keep-pots respectively and the feeding rate, expressed with the numbers of Daphnia pulex LEYDIG eaten, were measured every-day. The size of the experimental fish were measured several times during the experimental period of 25 days. The results obtained are as follows : 1. The activity did not rise with 3 and 6 stimulators and was lowered with one stimnlator. 2. A negative correlation was found between oxgen consumption and the number of companions. 3. The social facilitations both in the feeding behavior and in the growth rate were demonstrated during the early experimental period, namely, the former was recognized during the first 10 days of the experiment and the latter during the first 7 days. That is, the social facilitation in the feeding behavior and reduction of respiration seemed to accelerate the growth. 4. The change of the facilitation rate (FR) through a day showed that the highest value was observed in the morning, a relatively low value in the afternoon and in the nighttime. 5. However, during the later experimental period, a little or no facilitation effect was observed both in feeding and growth. Some problems concerning the growth as a function of the social facilitation of feeding behavior were discussed.
1971-09-30

グッピーにおける摂食行動の社会的促進 : III.社会的促進と運動・呼吸・生長との関係

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