甲状腺素对斜带石斑鱼仔鱼变态的影响  

Effects of thyroxine on metamorphosis of orange-spotted grouper (Epinephelus coioides) larvae

作　　者：唐啸尘[1] 刘晓春[1] 林浩然[1] 张海发[1] 刘付永忠[1] 

机构地区：[1]中山大学水生经济动物研究所

出　　处：《热带海洋学报》2006年第1期33-37,共5页Journal of Tropical Oceanography

基　　金：国家海洋863项目(2003AA603011);广东省科技计划项目(2001A3050201);教育部科学技术研究重点项目(02150);广东省重大科技兴海项目(A200000A02)

摘　　要：用甲状腺素(Thyroxine,T4)处理斜带石斑鱼Epinepheluscoioides仔鱼,研究T4对仔鱼变态的影响。仔鱼在变态前期和变态高峰期,用0.01mg·L-1T4处理7d后仔鱼完成变态,用0.10mg·L-1T4处理4d后仔鱼完成变态,用1.00mg·L-1T4处理3d后仔鱼完成变态,对照组仔鱼在实验期间未能完成变态。用0.01mg·L-1T4处理变态高峰期仔鱼其存活率明显提高和全长增长明显变慢,但对变态前期仔鱼无影响;用0.10和1.00mg·L-1T4处理变态前期和变态高峰期仔鱼,其存活率显著降低和全长增长明显变慢。结果表明,在变态高峰期用0.01mg·L-1T4处理仔鱼能加速它的变态并提高其存活率。The response of orange-spotted grouper （Epinepnelus coioides ） larvae to thyroxine （T4） was studied. At pre-metamorphosis （Pre-M） and metamorphosis climax （MC）, metamorphosis was completed in7 days for larvae treated with 0.01mg·L^-1 of T4, in4 days for larvae exposed to 0.10mg·L^-1 and in 3 days for larvae immersed in 1.00mg·L^-1, but none of the fish in the control groups completed metamorphosis during this period. The survival rates of the fish were significantly higher but the total lengths obviously shorter in the T4 treatment group of 0.01mg·L^-1 than in the control group at MC,while there was no difference at Pre-M. The survival rates of the fish were significantly lower and the total lengths obviously shorter in the T4 treatment groups of 0.10mg·L^-1 and 1.00mg·L^-1 than in the control groups both at Pre M and MC. These results suggested that 0.01mg·L^-1 of T4 could accelerate the metamor phosis and increase the survival rate of orange-spotted grouper larvae at metamorphosis climax.

关 键 词：斜带石斑鱼Epinephelus coioides 甲状腺素 仔鱼变态 

分 类 号：S962[农业科学—水产养殖] Q418[农业科学—水产科学]