目前一些河蟹育苗单位对育苗过程中的一个或几个主要环节处置不当,造成育苗减产。山东省日照市水产研究所自1994年始连续二年河蟹育苗取得好效益,分别育苗255公斤和350多公斤。现将育苗生产中的几个主要环节及其管理措施介绍如下。 一、亲蟹入池和幼体培育密度 为使池中幼体发育同步,减少后期大眼幼体残食Ⅴ期幼体的机会,每笼放经挑选的即将排幼的亲蟹30只左右(视亲蟹个体大小而定),每池布笼子10—20 At present, some crab nursery units improperly dispose of one or several major aspects of the seedling raising process, resulting in a decrease of nursery production. Rizhao City, Shandong Province Institute of Fisheries for two consecutive years since 1994, crab breeding achieved good results, respectively, 255 kilograms of seedlings and more than 350 kilograms. Now nursery production in several major aspects and management measures are as follows. First, the crab pooling and larval culture density in order to synchronize the development of larvae in the pond to reduce the late stage of juvenile megalobodal reared juvenile opportunities, each cage by the upcoming selection of about 30 young crabs row (about crab Individual size), cage 10-20 per cage