进入秋冬季以后,鱼种管理处于关键时期,除抓好正常的饲养管理外,应适时并塘,使鱼种安全越冬。下面就鱼种的秋冬管理谈几点技术要求,供参考。 一、秋季鱼种并塘 鱼种并塘要切实把握以下几点: 1.并塘时间 并塘应选在无风晴朗天气,水温5～10℃左右进行为宜。因为水温过低,如0℃以下鱼体容易受冻伤,患水霉病;而水温过高,鱼类活泼又容易受机械伤并引起其他疾病。 2.严防鱼体受伤 捕捞前鱼种应停食3～5天,在拉网捕捞、过筛选鱼、运输投放等操作过程中,都要认真负责,细致小心,绝不能麻痹大意,严防鱼体受伤。 3.合理掌握放养密度 随水温下降,鱼类活动减少,耗氧量降低,所以并塘越冬鱼种可较饲养密度大些。但绝不能盲目增加密度,要留有余地。一般每亩水面放养12cm左右的鱼种2～3万尾为宜,即每立方米水体放养0.54～0.79kg Into the autumn and winter, species management is at a critical period, in addition to do a good job of the normal feeding and management, should be timely and ponds, so that fish species safe and wintering. Below the species of autumn and winter management talk about a few technical requirements for reference. First, autumn and pond species of ponds and ponds to effectively grasp the following points: 1. And pond pond time and should be selected in a clear sunny weather, the water temperature is about 5 ~ 10 ℃ appropriate. Because the water temperature is too low, such as 0 ℃ below the body of fish susceptible to frostbite, suffering from watery mildew; and water temperature is too high, the fish lively and vulnerable to mechanical injury and cause other diseases. 2. Prevent fish injuries should be suspended before fishing species should be suspended for 3 to 5 days in the net fishing, screening of fish, transport and other operational procedures, must be responsible, careful and must not be careless, to prevent fish injuries . 3. Reasonable control of stocking density With the decline in water temperature, fish activities to reduce oxygen consumption decreased, and ponds overwintering fish species more feeding density. However, we must not blindly increase the density, leaving room for improvement. In general, the stocking of about 12cm per mu of water surface 2 to 30,000 is appropriate, that is, stocking 0.54 ~ 0.79kg per cubic meter of water