| 江苏湖泊河蟹资源特征、变动规律及蟹苗放流效果的研究 |
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| 引用本文： | 赵振伦 黄宁昌. 江苏湖泊河蟹资源特征、变动规律及蟹苗放流效果的研究[J]. 淡水渔业, 1991, 0(1): 10-13 |
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| 作者姓名： | 赵振伦 黄宁昌 |
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| 作者单位： | 南京农业大学，南京农业大学，南京农业大学，南京农业大学 |
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| 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。
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| 关 键 词： | 河蟹 资源 蟹苗 变动规律 放流效果 |
Study on characteristics and change law of river crab stock and liberatio neffect of crab fry in lakes in Jiangsu |
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| Abstract: | River crab population consist of three year-groups in lakes. Three causes affect yearly stock changesof rive crab. Ten factors affect stock variety of rive crab. During autumn-winter fishing, the ratio of two-autumn rivecrab is 61. 83%. After liberation, return capture-index of rive crab is 400-800, return-capture ratios 2-4%. theeffect of liberation maybe influnced by food base, libeution density, living environment, change of water level, lakecharactistics, destruction from man and so on. |
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