Abstract:
A 30 days breeding test was performed to investigate the effects of stocking density and water temperature on survival and growth of juvenile
Brocarded carp.Five stocking density treatments(10,30,50,70,90 fish/m
3)and five water temperature treatments(10,15,20,25,30℃)were setted,respectively.The results showed that there were no significant difference in other indexes(
P>0.05) except the average final total weight between 10 fish/m
3 and 30 fish/m
3.When the stocking density was greater than 30 fish/m
3 and with the increase of stocking density,the average survival rate,final weight,daily gain and specific growth rate of juvenile
Brocarded carp were significantly decreased(
P<0.05),but the average final total weight and feed coefficient were significantly increased(
P<0.05).With the increase of water temperature,the average final weight,daily gain and specific growth rate of juvenile
Brocarded carp showed a trend of increasing first and then decreasing,with the maximum value at 25℃ group and significantly higher than other water temperature groups(
P<0.05).But the feed coefficient first decreased and then increased,with the minimum value at 25℃ group.Considering comprehensively feed coefficient and yield per unit water,we suggested that the suitable water temperature and stocking density for
Brocarded carp cultured in still water pond were 25℃ and 30 fish/m
3.