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我们于1994、1995两年,多次进行红螯螯虾常温、恒温繁殖和室内外育苗试验。现将繁育实践及有关技术,扼要归纳,供同行参考: 一、繁殖习性: 红螯螯虾在自然条件下养殖,一年达性成熟。若在温棚内相对恒温养殖6个月以上,即可提前性成熟。我们发现最小性成熟个体21克,但抱卵极少,没有繁殖价值。红螯螯虾属热带——亚热带多次产卵、体外受精,抱卵孵化型的虾类。平均体重80克,其抱卵数平均622粒。抱卵量少,而且孵化期长达6～8周,所以不易形成大批量繁育种苗。但在闽西北自然条件一年可产卵繁殖2～3次;若恒温则不受季节限制,周年可
We in 1994,1995 two years, many times chela crawfish at room temperature, constant temperature breeding and indoor and outdoor nursery trials. Breeding practices and related technologies will now be briefly summarized for peer reference: First, the breeding habits: red crayfish breeding in natural conditions, a year of sexual maturity. If incubated in the greenhouse relative temperature more than 6 months, you can advance maturity. We found that the smallest of 21 g of mature individuals, but hold very little eggs, no breeding value. Red claw is a tropical shrimp - sub-tropical spawning, in vitro fertilization, hatch hatch-type shrimp. The average weight of 80 grams, the average number of spawning 622. Small amount of eggs, and the incubation period of up to 6 to 8 weeks, it is not easy to form a large number of breeding seedlings. However, natural conditions in northwest Fujian can spawn 2 to 3 times a year; if the temperature is not seasonally restricted, the anniversary can be