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在蟹种培育过程中,出现了幼蟹性早熟现象。这些成熟幼蟹个体小型化,只有15—40克左右,市场售价低廉,还常因不能正常蜕壳而逐渐死亡,严重影响了河蟹养殖的经济效益,给养殖户带来很大的经济损失。 一、幼蟹性早熟的原因 造成幼蟹性早熟的原因主要有以下几个方面: 1、蟹苗苗种质量差,放养早。 2、放养密度过稀,促进了幼蟹的生长发育。 3、养殖水体盐度较高,刺激了河蟹的性
Crab species in the breeding process, there has been a phenomenon of juvenile crab precocious puberty. These mature crab individual miniaturization, only about 15-40 grams, the market price is low, but also often die gradually due to not normal shell, seriously affecting the economic benefits of crab farming, farmers bring great economic losses . First, the causes of sexual crab precocious puberty Caused by early crab causes are mainly the following aspects: 1, crab seedlings of poor quality, stocking early. 2, stocking density is too thin, promote the growth and development of crab. 3, aquaculture water salinity higher, to stimulate the crab’s sex