オニオコゼ　Ｉｎｉｍｉｃｕｓ　ｊａｐｏｎｉｃｕｓ　雌１尾の産卵と卵質

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書誌事項

タイトル別名
  • Spawning and Egg Quality of Individualy Reared Female Devil Stinger, Inimicus japonicus
  • オニオコゼ Inimicus japonicus メス 1 ビ ノ サンラン ト ランシツ

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抄録

One female and three males of the devil stinger Inimicus japonicus were reared in an indoor tank (1t) from late March to late September. Spawning was observed from June 8 to August 26, and the 14 times spawning occurred intermittingly. The total wet weight of eggs spawned from one female was 277.68 g and the largest wet weight in one day was 48.57 g. The average diameter of eggs varied between 1.146 mm and 1.323 mm, decreased as spawning season passed, and a significant correlation was detected between the average diameter and the water temperature on the spawning day (r=-0.954, P<0.01) . The total hatching rate varied between 28.47% and 97.11%. The normal hatching rate varied between 1.81% and 87.50%, and the survival activity index (SAI) varied between 23.81 and 0.58, both decreased as spawning season passed. On the contrary the abnormal hatching rate increased. Statistically significant correlations between egg diameter and normal hatching rate (r=0.726, P<0.05), and egg diameter and SAI (r=0.741, P<0.05) were observed, however no relation was observed between egg diameter and total hatching rate. These results indicate that the devil stinger used in this study is a multiple spawner and eggs spawned at the beginning of the spawning season had high quality.

収録刊行物

  • 水産増殖

    水産増殖 53 (2), 107-114, 2005

    日本水産増殖学会

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