江苏湖泊河蟹资源特征、变动规律及蟹苗放流效果的研究  

Study on characteristics and change law of river crab stock and liberatio neffect of crab fry in lakes in Jiangsu

作　　者：赵振伦[1] 黄宁昌[1] 谢庄[1] 胡小玲[1] 

机构地区：[1]南京农业大学

出　　处：《淡水渔业》1991年第1期10-13,共4页Freshwater Fisheries

摘　　要：湖区河蟹群体通常由三个年龄组组成。造成河蟹资源量年变化有三方面原因。影响其资源盛衰主要有十大因素。秋冬季河蟹捕获量中Ⅱ秋龄占多数达61.68％。蟹苗放流后的回捕指数400～800,回捕率2～4％。放流效果由湖区饵料基础、放流密度、栖息环境、水位变动、潮泊性状和人为伤害等条件决定。River crab population consist of three year-groups in lakes. Three causes affect yearly stock changes of rive crab. Ten factors affect stock variety of rive crab. During autumn-winter fishing, the ratio of two-autumn rive crab is 61. 83%. After liberation, return capture-index of rive crab is 400-800, return-capture ratios 2-4%. the effect of liberation maybe influnced by food base, libeution density, living environment, change of water level, lake charactistics, destruction from man and so on.

关 键 词：河蟹 资源 蟹苗 变动规律 放流效果 

分 类 号：S966.16[农业科学—水产养殖]