甲状腺素对斜带石斑鱼卵黄囊期仔鱼生长发育的影响Effect of Thyroxine on Growth and Development of Epinephelus coioides Yolk-sac Larvae
唐啸尘;周歧存;丁燏;张海发;王云新;
摘要(Abstract):
用4种不同浓度的甲状腺素(T4)分别浸泡斜带石斑鱼卵黄囊期仔鱼,研究T4对仔鱼发育、生长和存活的影响。结果表明,在孵化后24 h内,T4对仔鱼发育的促进作用不明显;在孵化24 h后,T4对仔鱼消化道的发育有促进作用。在孵化后72 h,0.01 mg·L-1 T4处理组仔鱼小肠管径、直肠管径、全长与对照组相比差异均不明显;0.10 mg·L-1和1.00 mg·L-1 T4处理组仔鱼小肠和直肠管径显著比对照组大(P<0.01),1.00 mg·L-1 T4处理组仔鱼全长显著比对照组短(P<0.01),而0.10 mg·L-1处理组仔鱼全长与对照组相比无明显差异(P>0.05)。在孵化后第8天,0.10 mg·L-1 T4处理组仔鱼存活率明显比对照组高(P<0.01),而0.01 mg·L-1 T4组和1.00 mg·L-1 T4组与对照组之间存活率差异不明显(P>0.05)。结果提示0.10 mg·L-1 T4处理能促进斜带石斑鱼卵黄囊期仔鱼的消化道发育并提高其存活率。
关键词(KeyWords): 斜带石斑鱼;卵黄囊仔鱼;消化道发育;生长;甲状腺素
基金项目(Foundation): 广东省科技计划项目(2010B020308008);; 广东海洋大学博士启动项目(0812269)
作者(Authors): 唐啸尘;周歧存;丁燏;张海发;王云新;
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