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鱼种是水库渔业的首要物质基础。实践证明,放养不同规格的鱼种,对回捕率及鱼产量具有决定性的作用。新疆冬季严寒,冰封期长达五个多月,如放养的鱼种达不到一定的规格,越冬后的成活率将不能保证生产的需要。我们曾作过测试:放养1.5寸鱼种,回捕率仅1.5％;放养3寸鱼种,回捕率提高至13.22％,若放养规格能达到3.5寸以上,回捕率便高达26.1％。可见培育大规格鱼种对于提高水库鱼产量具有极其重要的意义。
Fish species are the primary material basis for reservoir fisheries. Practice has proved that stocking different sizes of fish species, the capture rate and fish yield has a decisive role. Winter in Xinjiang is cold and the ice period lasts more than five months. If the species of fish stocked do not meet certain specifications, the survival rate after winter will not be able to guarantee the production needs. We have tested: stocking 1.5-inch fish species, the recovery rate of only 1.5%; stocking 3-inch fish species, the recovery rate increased to 13.22%, if the stocking specifications can reach 3.5 inches or more, the recovery rate was as high as 26.1%. It can be seen that cultivating large-sized fish species is of great significance for improving the production of fish in reservoirs.