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Influence of dietary vitamin C on reproduction of male Chinese mitten-handed crab (Eriocheir sinensis)


, : Influence of dietary vitamin C on reproduction of male Chinese mitten-handed crab (Eriocheir sinensis). Chinese Journal of Zoology 39(2): 1-5

The influence of dietary vitamin C (Vc) on reproduction of male Chinese mitten-handed crab (Eriocheir sinensis) was studied. Different levels of Vc were supplemented in diets, in order to clarify the effect of Vc on male reproduction. There were 5 groups in the experiment, and the Vc supplement levels were 0 mg/ 100 g feed (group 1) , 200 mg/ 100 g feed (group 2) , 400 mg/ 100 g feed (group 3), 600 mg/ 100 g feed (group 4) , and 800 mg/ 100 g feed (group 5) , respectively. Male crabs weighted 70 - 80 g on average were separately fed with one of the test diets. The feeding experiment was carried out indoor for 50 days. The results showed that 1 ) Vc contents of hepatopancreas, testis,'and glandula accessoria in group 3 were 2.261 [mu]g/mg prot, 10.217 pg/mg prot, and 7.661 ptg/ mg prot, respectively, higher than those of the other groups ; 2) Hepatopancreas indexes and GSI in group 3 were the highest (0.052 3 and 0.026 8) among the five groups ; 3) The rate of weight gain of group 3 (23.28% ) was the highest and the group 1 was the lowest (12.5% ) ; 4) The concentration of testosterone in group 2 was the highest (1.257 ng/ml) , followed by group 3 ;

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