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一、虹鳟对环境的要求 虹鳟适宜生活的温度为12～18℃,在适温范围内摄食旺盛,生长迅速,机体保持着良好的新陈代谢状态;低于8℃或高于20℃,食欲减退,生长缓慢,抗病力降低;超过24℃停止摄食,温度达到27～30℃时,短时间内死亡;溶氧充足时,短时间可耐受26℃的高温。虹鳟不仅要求低水温,也要求较高的溶解氧。一般情况下,虹鳟的安全临界溶氧是3.15毫克/升,低于4.3毫克/升时鱼就开始浮头,与此同时出现死亡;溶氧低于5毫克/升则虹鳟呼吸频
First, the rainbow trout on the environment Rainbow trout suitable for living temperature of 12 ~ 18 ℃, in the appropriate range of temperature exuberant food, rapid growth, the body maintains a good metabolic state; below 8 ℃ or above 20 ℃, loss of appetite, Slow growth, disease resistance decreased; more than 24 ℃ to stop feeding, the temperature reaches 27 ~ 30 ℃, died within a short time; dissolved oxygen sufficient, a short time can withstand high temperatures of 26 ℃. Rainbow trout not only requires low water temperature, but also requires a higher dissolved oxygen. Under normal circumstances, the safety critical rainbow trout dissolved oxygen is 3.15 mg / l, below 4.3 mg / l when the fish began to float head, at the same time death; dissolved oxygen below 5 mg / l rainbow trout respiratory frequency