瓯江海南沼虾溯江幼虾资源的初步调查

Preliminary Investigation on Resources of Anadromous Macrobrachium hainanense Juvenile in Oujiang River

本文报道了瓯江海南沼虾溯江幼虾资源的现状。瓯江当年生海南沼虾的溯江幼虾在每年6月底开始出现,11月后消失;高峰期在8月中、下旬。据统计:1988年仅青田县沙埠至石溪口江段的海南沼虾幼虾产量就达8700公斤。估算年蕴藏量在1.75万公斤以上,且目前处于基本稳定状态。

The resources of anadromous Macrobrachium hainanense juvenile in Oujiang River were investigated, which showed that the prawn born in the very year appeared in the river at the end of June each year, and disappeared after November, The abundant period lay in the middle and latter parts of August. According to the statistics, the prawn production in Qingtian County(from the reach of Sapu toShiqikou) amounted to 8700 kg in 1988. It was estimated that the prawn reserve in Oujiang would be as high as over 17500 kg per year, and at present the resource was on a relatively stable stage.