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一、寒潮来临前的防范措施1.了解重点防寒的养殖品种防寒的重点品种是不耐寒的温水性鱼虾类,广东省养殖的温水性鱼虾品种不少,其中主要的品种有罗非鱼、鲮鱼、罗氏沼虾、南美白对虾、淡水白鲳等。这些品种耐低温的能力差,鲮鱼6℃~7℃,罗非鱼10℃~12℃就会大量死亡。这些温水性鱼虾一般在水温降到上述范围前都必需采取保温措施,否则会冻死,有些即使没有冻死,冻伤后极易诱发感染水霉、寄生虫而大量死亡。
First, the cold before the preventive measures 1. To understand the key cold-resistant breeds Cold-resistant varieties are not cold hard warm water fish and shrimp, Guangdong Province, breeding warm water fish species, of which the main varieties of tilapia , Catfish, Macrobrachium rosenbergii, white shrimp, freshwater pomfret and other white. These varieties of poor low temperature ability, catfish 6 ℃ ~ 7 ℃, tilapia 10 ℃ ~ 12 ℃ will be a large number of deaths. These warm water fish shrimp usually in the water temperature dropped to the above range are necessary to take insulation measures, otherwise it will freeze to death, and some even without freezing and thawing, frostbite can easily lead to infection of watery mildew, parasites and a large number of deaths.