盐度对三疣梭子蟹幼蟹蜕壳的影响

为探讨盐度在三疣梭子蟹幼蟹养殖中的作用, 设置5个不同梯度的盐度(10、15、20、27、35)来检验对梭子蟹幼蟹存活及蜕壳的影响. 结果显示: 盐度显著影响三疣梭子蟹幼蟹的蜕壳存活率以及其蜕壳周期的长短和蜕壳率. 盐度10、15组具有较高蜕壳存活率, 分别为(89±0.10)%和(72±0.10)%; 具有较短的蜕壳周期, 分别为(18.15±0.52)d和(17.51±0.73)d, 且蜕壳率也较高. 因此, 在三疣梭子蟹幼蟹养殖过程中, 可采取10~15的较低盐度获得较稳定的存活率及较短的蜕壳周期

Effects of Salinity on the Molting of Juvenile Swimming Crab (Portunus trituberculatus)

To investigate the effects of salinity on the molting of juvenile swimming crab (Portunus trituberculatus), five salinity (10, 15, 20, 27 and 35) treatments are conducted to evaluate their impacts on survival rate and molt of juvenile swimming crab. Results show that salinity has a significant effect on the survival rate of P.trituberculatus, as well as the molt cycle and the molt frequency. Generally, the survival rate is higher for groups at salinity of 10, 15 (89±0.10)%, (72±0.10)%, and the molt cycle is relatively shorter for these two groups (18.15±0.52)d, (17.51±0.73)d, which also have higher molt frequency. Our preliminary experimental results suggest that during the culture of juvenile swimming crab (P.trituberculatus), the low salinity of 10-15 could be considered to obtain a stable survival rate and relatively shorter molt cycle