トリヨードチロニン浴によるキジハタ仔魚の初期減耗の軽減

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タイトル別名
  • Improvement of Larval Survival by 3,3',5-triiodo-L-thyronine(T3) Immersion in Red Spotted Grouper.
  • トリヨードチロニン浴によるキジハタ仔魚の初期減毛の軽減
  • トリヨードチロニンヨク ニ ヨル キジハタシギョ ノ ショキ ゲンモウ ノ ケイゲン

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抄録

In order to reduce the mortality of red spotted grouper, Epinepherus akaara, on 3 day after hatching, effect of a T3 thyroid hormone (3, 3', 5-triiodo-L-thyronine) immersion was examined using a small experimental system. Immersion of eggs one day before hatching in T3 containing seawater (100 ng/ml) for 5 hours did not improve the hatchability and survival of larvae under starvation. When the hatching larvae were treated with the hormone, 73% survived after day 6; only 2% in control group survived. The survival rate did not improved much when older larvae were used. In the range of 6.25 to 100 ng/ml, whose larvae immersed in solutions of higher T3 concentration showed better survival in most cases. T3 concentration in hatching larvae body was about 10 ng/g when the eggs were treated with 200 ng/mlof T3 for 6 hours one day before hatching, while 120 ng/g T3 was detected in larvae one day after hatching when the hatching larvae were treated with the hormone. Our result suggested that larval survival can be improved by elevating the concentration of T3 thyroid hormone on the day of hatching.

収録刊行物

  • 水産増殖

    水産増殖 47 (4), 589-593, 1999

    日本水産増殖学会

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