절식, 수온 및 유속이 극동산 뱀장어(Anguilla japonica) 렙토세팔루스의 변태 유도에 미치는 영향
Effects of Starvation, Water Temperature, and Water Flow on the Metamorphosis of Leptocephalus of Japanese Eel Anguilla japonica
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초록
We determined the effects of starvation, water temperature, and water flow on the onset of metamorphosis in leptocephaliof the Japanese eel Anguilla japonica. Leptocephali larger than 50 mm (ca. 200 days old) were reared in10-L tanks under different feeding, water temperature, and water flow regimes. Fasted leptocephali metamorphosedearlier and faster than did the fed ones. Metamorphosis was faster in the high water flow tank (1.2 L/min) than in thetank with flow at 0.6 L/min. The duration of metamorphosis was slightly shorter at 26°C than at 23°C. To conclude,starvation induced the metamorphosis of artificially produced leptocephali larger than 50 mm TL. Increased waterflow and water temperature both appear to induce and shorten metamorphosis.
Abstract
We determined the effects of starvation, water temperature, and water flow on the onset of metamorphosis in leptocephaliof the Japanese eel Anguilla japonica. Leptocephali larger than 50 mm (ca. 200 days old) were reared in10-L tanks under different feeding, water temperature, and water flow regimes. Fasted leptocephali metamorphosedearlier and faster than did the fed ones. Metamorphosis was faster in the high water flow tank (1.2 L/min) than in thetank with flow at 0.6 L/min. The duration of metamorphosis was slightly shorter at 26°C than at 23°C. To conclude,starvation induced the metamorphosis of artificially produced leptocephali larger than 50 mm TL. Increased waterflow and water temperature both appear to induce and shorten metamorphosis.
참고문헌 (35)
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