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长江口原为我国天然蟹苗的最大产区。近几年其产量逐年减少,1988年和1989年均未形成苗汛。在此期间蟹苗南移,浙江省瓯江口产区的产量却逐年增加,并已成为目前的最大产区。但其产量及规模远不及当年长江口区的大。如1987年瓯江口最高产量为7500千克,而长江口产量在1981年曾达到65776千克。为了充分利用蟹苗资源,提高经济效益,近年来瓯江地区将大眼幼体培育为幼蟹再行出售。但是幼蟹运输方法仍用运输大眼幼体的方法,成活率不甚理想。过去已有一些介绍运输大眼幼体的经验报道,但是运输幼蟹还是近年的事,尚未见这方面的报道。本文就作者在这方面所做试验,及参加运输和所了解到的这方面情况,对如何提高幼蟹成活率提出意见和建议。
The Yangtze River Estuary was the largest natural crab production area in China. In recent years, its output has been decreasing year by year, with no floods in 1988 and 1989. Crabs moved south during this period, and the output of the Oujiangkou area in Zhejiang Province increased year by year and has become the largest producing area at present. However, their production and scale are far less than those in the Yangtze River Estuary. For example, in 1987, the maximum output of Oujiangkou was 7500 kg, while that of the Yangtze Estuary reached 65776 kg in 1981. In order to make full use of crab resources, improve economic efficiency, in recent years the Oujiang area will be large larvae of juvenile crab for sale. However, the method of transporting juvenile crabs is still used to transport larvae, and the survival rate is not satisfactory. In the past, there have been some reports on the transport of large-eyed juveniles. However, the transport of young crabs is still a recent issue and no such report has been made yet. In this paper, the author in this area to do experiments, and participate in transport and understand this aspect, how to improve survival rate of crabs comments and suggestions.