论文部分内容阅读
夏季,精养池的一部分成鱼已达上市规格,应及时捕捞上市,这样既利于鱼类生长及大规格优质鱼种培育,又可减轻池塘的载鱼负荷。夏季捕捞热水鱼应把握以下几项关键技术。1.捕捞时间。一般应选择在晴好天气,气温凉爽,鱼不浮头的黎明前后或早晨水温较低时进行(具体时间可依照离市场远近程度、销售时间而定),因为这时拉网捕鱼对塘鱼的影响小,又可及时将捕起的鲜鱼供应上市。阴霾、闷热天气,塘鱼有浮头征兆
In summer, a part of the intensive ponds have reached the market specifications and should be catched and marketed in a timely manner. This will not only help fish growth and breeding of large-sized and fine quality fish species, but also reduce the load on the pond. Summer fishing for hot water fish should grasp the following key technologies. Fishing time Generally should be selected in the fine weather, the temperature is cool, the fish do not float before dawn or in the morning when the water temperature is low (the specific time can be in accordance with the extent of the market, the sales time may be), because then pull the net fishing pond Little effect, but also timely capture of fresh fish market. Haze, hot weather, pond fish have floating head signs