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河蟹人工育苗在我省已大面积开展,由于亲蟹来源不足,给育苗工作带来了很大的困难。经过几年的,生产实践,我们逐步摸索出一套在室外土池利用自然海水进行亲蟹人工越冬的技术。1986、1987、1993年的越冬成活率分别为80％、85％、95％;抱印率分别为85％、85％、100％,且卵量均在30～40万粒以上 1 越冬池的建设越冬池需靠近海水源.进排水方便,海水盐度10～30.水质无污染。越冬池四周加防逃设施,材料可用石棉瓦或砖墙,高度应高出地面50cm以上,且内表面光滑,拐弯处应建成钝角,防止河蟹攀缘外逃。越冬池水深要求1.5m以上,冬季冻层下至少应保持0.6m以上的水层。
Artificial breeding of crab in our province has been carried out in large areas, due to the lack of sources of crabs, nursery work has brought great difficulties. After several years of production practice, we gradually developed a set of techniques for outdoor crab artificial overwintering of natural crabs in outdoor soil ponds. The survival rates of overwintering in 1986, 1987 and 1993 were 80%, 85% and 95% respectively; the imprinting rates were 85%, 85% and 100% The construction of wintering ponds need to be close to the seawater source, with convenient drainage and drainage, and salinity of 10-30 for seawater. The winter pool around the anti-escaped facilities, materials available asbestos or brick wall, the height should be higher than the ground above 50cm, and the inner surface is smooth, the corner should be built obtuse angle, to prevent crab climbing escape. Overwintering pond water depth requirements of 1.5m above the winter frozen layer should be maintained at least 0.6m above the water layer.