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实践经验中,养殖池塘水温9℃以上于南美白对虾而言是安全的,但记者在走访湛江地区多个虾塘时发现,有部分对虾在10~11℃对虾就开始有冻伤甚至冻死现象。究竟原因何在?湛江市水产技术推广中心站副站长刘宏良解答了记者的疑惑。原来,对虾蜕壳的时候体质最脆弱,蜕壳周期与虾的大小有关,持续降温5天以上很容易碰上一次蜕壳期,低温会加剧它的应激反应。此外,有部分池塘投苗密度太大,为尽量减少池塘水上下交流,从而减慢池塘底部
Practical experience, aquaculture ponds above 9 ℃ in terms of P. vannamei is safe, but the reporter visited a number of shrimp ponds in Zhanjiang found that some shrimp at 10 ~ 11 ℃ shrimps began to have frostbite or even frozen to death . What exactly is the reason? Zhanjiang City Fisheries Technology Promotion Center Deputy Director Liu Hongliang answered the reporter’s doubts. It turned out that when the shrimp molt the constitution of the most vulnerable, the molt cycle and size of the shrimp, continuous cooling more than 5 days is easy to run into a molt, low temperature exacerbated its stress response. In addition, part of the pond seedling density is too large, in order to minimize pond water exchange, thereby slowing the bottom of the pond