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长期以来家鱼人工繁殖,由于每年催产时间较晚 (5月中下旬)、鱼种的生长期较短,规格较小,一般在3.5 寸左右,不适应生产发展的需要。为了培育大规格鱼种,缩短成鱼饲养周期,我们根据暖棚能提高温度,加快蔬菜生长的原理,并参观学习了江苏省淡水水产研究所在玻璃暖房中“提早鲢、鳙、草鱼人工繁殖”的经验,结合上海地区特点,我们进行了提早家鱼人工繁殖催产期的研究。经1984、1985两年的试验,获得了成功,现将试验情况总结如下。材料与方法一、玻璃暖房及其配套设施玻璃暖房为钢架结构,玻璃屋面。暖房
For a long time artificial reproduction of domestic fish, due to late each year of oxytocin (mid to late May), the growth of species is shorter, smaller specifications, generally about 3.5 inches, not suited to the needs of production development. In order to cultivate large-scale species, shorten the feeding cycle, according to the greenhouse can increase the temperature, speed up the principle of vegetable growth, and visited the Institute of Freshwater Fisheries in Jiangsu Province in the glass greenhouse “early silver carp, bream, grass carp artificial propagation ”Experience, combined with the characteristics of Shanghai, we conducted early artificial reproduction of domestic fish off-season study. After 1984, 1985 two years of test, was successful, the test situation is summarized as follows. Materials and methods First, glasshouse and its supporting facilities Glasshouse for the steel structure, glass roof. greenhouse