基因重组金枪鱼生长激素对草鱼鱼种生长的促进作用

EFFECTS OF RECOMBINANT-TUNA GROWTH HORMONE(R-TGH)ON GROWTH OF GRASS CARP FINGERLING

本文反映了基因重组金枪鱼生长激素(r-tGH)对草鱼鱼种生长的影响。r-tGH通过注射、灌喂和投喂三种方式都可以提高草鱼鱼种的相对体重和相对体长生长率、食物转化率和血清生长激素水平。同时,用药组的肥满度增加量比对照组的高,说明r-tGH促进草鱼鱼种体重增长的效果比促进体长增长的效果好。

R-tGH by i. p. injection, oral administration and mixed with food can increase RSGR and RLGR of grass carp (Ctenopharyngodon idellus) fingerling, The results may suggest that r-tGH had biological activity on the fingerling and could accelerate its growth. In the meanwhile,r-tGH may be absorbed intactly into blood circulation by digestive tract then can express biological activity itself in the fingerling. The increase of condition factors of the fingerling with r-tGH administration are higher than the control, which may suggest that r-tGH stimulated weight gain better than length increase on the fingerling. The food conversion efficiency and serum GH concentration of the fingerling with r-tGH administration are higher than the control. And these may be the reasons of the growth promotion of r-tGH on grass carp fingerling.