著者

宮原 治郎 荒川 敏久 高屋 雅生

出版者

[出版者不明]

巻号頁・発行日

no.15, pp.5-11, 1989 (Released:2011-03-05)

著者

渡邉 武 李 明哲 水谷 潤 山田 哲雄 佐藤 秀一 竹内 俊郎 吉田 範秋 北田 哲夫 荒川 敏久

出版者

日本水産學會

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.57, no.4, pp.681-694, 1991

被引用文献数

12 59

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Red seabream broodstock were fed various diets of different nutritional quality for either 26 days or shortly before spawning to clarify the effective components in cuttlefish meal and raw krill which aid in quality egg production.<br> The percentage of buoyant eggs was lowest in the control group receiving the white fish meal diet, and was elevated by the addition of 200mg DL-α-tocopheryl acetate. The value was also effectively improved by replacement of white fish meal with defatted or intact cuttlefish meal as a protein source. Feeding broodstock with frozen raw krill after previously being fed control diet resulted in elevation of the percentage of buoyant eggs and normal larvae. Equally good results were obtained by substitution of cuttlefish liver oil in the control diet with 2.5% krill polar lipid or 2.5% krill nonpolar lipid. However, neither defatted krill meal nor fat-soluble fraction of cut-tlefish meal showed the good effect on the egg quality.<br> Consequently, the superior quality of cuttlefish meal to the white fish meal as a protein source for red seabream broodstock diets was reconfirmed. And the effective components in raw krill, aiding the reproduction of red seabream, are suggested to be the polar and nonpolar lipid fractions. In addition, vitamin E was also found to have the same efficiency for improvement of the egg quality.

著者

中田 久 中尾 貴尋 荒川 敏久 松山 倫也

出版者

公益社団法人日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.71, no.6, pp.942-946, 2005-11-15

被引用文献数

1 6

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ブリの人工授精による採卵技術の向上を目的として,HCG投与時の卵径と排卵時問,卵量および卵質との関係を調べた。卵径650〜800μmの卵を持つ養成3歳雌魚33尾にHCG(500IU/kg)を投与して排卵を誘導した。その結果,HCG投与時の卵径(D,μm)と排卵までの時間(T,hr)には,T=-0.082D+105.99(R^2=0.51)の式で表わされる負の相関関係が認められた。卵径700〜800μmの個体からは約53万粒/尾の卵が得られ,卵径650〜700μmの個体ではその半数であった。ふ化率はHCG投与時の卵径が大きい個体ほど高かった。