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KMID : 0894520090130010035
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Development & Reproduction
2009 Volume.13 No. 1 p.35 ~ p.41
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Effects of Rearing Condition during the Winter Period on Artificial Maturation and Reproduction of Cultured Female Eel, Anguilla japonica
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Kim Dae-Jung
Kim Yi-Cheong
Choi yong-Ki
Son Maeng-Hyun
Lee Jung-Uie
Park Mi-Seon
Heo Youn-Seong
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Abstract
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In the present study, we investigated the effects of rearing condition during the winter period on artificial maturation and reproduction of cultured female eel, Anguilla japonica. The female eel was adapted by combination of environmental conditions (seawater/low temperature, 10℃; seawater/high temperature, 20℃; freshwater/low temperature, 10℃; freshwater/high temperature, 20℃) during 8 weeks of the winter period. Then, the female eel cultivated by different conditions during the winter were transferred to seawater at 20℃ for induction of artificial maturation by salmon pituitary extraction (SPE) injection. The results shown that gonadosomatic index (GSI) and plasma levels of estradiol-17β (E2) were significantly higher in female eel were reared in seawater than in freshwater, and were the highest at eel adapted by seawater/low temperature. Also, reproduction coefficient were higher in seawater/low temperature than in the other groups. These results will provide valuable information for elevation of the artificial maturation and reproduction coefficient in the cultured female eel.
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KEYWORD
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Artificial maturation, Reproduction coefficient, Eel
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