マダイ親魚の長期加温飼育による早期産卵について

DOI 日本農学文献記事索引 被引用文献1件 参考文献27件

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  • Acceleration of Spawning of Red Sea Beam, Pagrus major Brood Stocks in Tanks with Manipulaiton of Water Temperature.

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The acceleration of spawning of red sea bream, Pagrus major was attempted by subjecting the fish of 20°C to either a constant water temperature or to a temperature 3°C higher (+3°C group) than that of natural sea water. Fish maintained under natural sea water served as controls. Spawnings under 20°C began 1-1.5 months earlier than in the control. The beginning of spawning in the +3°C group occurred 0.5 month earlier than that of control. The percentages of buoyant eggs and viable hatching of eggs spawned at 20°C were higher than those of the control.<BR>The egg diameters of the +3°C group and of the control were inversely correlated with the water temperature. Since the variation in egg diameter at 20°C was small, it is suggested that these parameter can also be controlled by water temperature.<BR>These results suggest that the manipulation of water temperature may be an effective method for the acceleration of spawning and the improvement of the yield of viable hatching.

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  • 水産増殖

    水産増殖 43 (1), 137-143, 1995

    日本水産増殖学会

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