魚の遊泳馬力に及ぼす水温の影響〔魚の遊泳馬力に関する力学的研究-3-〕

概要

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It is considered that the swimming power of fishes must be affected by several environmental factors. In this study, physiological responses of fishes against water temperature were estimated by using values of their towing power output. Effect of the temperature were investigated about the water in which fishes had been reared and the water in which power measurements were performed. Two groups of rainbow trout as a typical cold water fish had been acclimated for a month in a temperature of 12°C for and 19°C. Tiapia was regarded as a warm water fish and organized into three groups. Each group was reared at 20°C, 26°C and 32°C, and towing power measurement was performed once a week at each of the three rearing temperatures. The highest towing power out put occurred at 12°C for rainbow trout, and at 26°C for tilapia. These were considered the significant temperatures for each species, and these temperatures might be optimum for their physiological conditions. Lastly, a consideration was explained to investigate dynamical problems in the performance.
日本水産學會の論文