飼育下および自然環境下におけるマンボウMola molaの成熟評価

書誌事項

タイトル別名
  • Estimation of Maturation in Wild and Captive Ocean Sunfish Mola mola
  • シイクカ オヨビ シゼン カンキョウカ ニ オケル マンボウ Mola mola ノ セイジュク ヒョウカ

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We investigated gonad maturation in 180 captiveMola molaand 148 wildMola mola. We compared the Gonad Somatic Index (GSI) based on body weight and the Gonad Index (KG) based on body length, and found a strong relationship between the two. Since it is difficult to measure the body weight of large ocean sunfish in the wild, KG is more useful for estimating maturity than GSI. This study also revealed that both GSI and KG are higher in captive specimens than in wild ones suggesting that gonad maturation of mola in captivity is faster than for mola in the wild.

収録刊行物

  • 水産増殖

    水産増殖 55 (2), 259-264, 2007

    日本水産増殖学会

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