长江中上游主要经济鱼类的渔业生物学特征
A PRELIMINARY STUDY OF THE FISHERIES BIOLOGY OF MAIN COMMERCIAL FISHES IN THE MIDDLE AND UPPER REACHES OF THE YANGTZE RIVER
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摘要: 根据1996-1999年长江中上游渔业资源监测资料,分析了青鱼、草鱼、鲢、鳙、铜鱼、圆口铜鱼、长吻鮠、河鲶、瓦氏黄颡鱼、鲤等10种主要经济鱼类的渔业生物学特性,并应用von Bertalanffy 公式、Key 公式、Beverton-Holt 公式等估计了生长参数、总死亡系数、自然死亡系数、捕捞死亡系数、总存活率、总死亡率、自然死亡率、捕捞死亡率和开发率,讨论了资源的开发状况,针对存在的问题,提出了渔业管理意见.Abstract: According to the monitoring data of fishery resources in the middle and upper reaches of the Yangtze River in 1996-1999, this paper deals with the fishery biological characteristics of ten species of major commercial fishes. The population growth parameters(K, L∞, W∞),total mortality coefficient, natural mortality coefficient, fishing mortality coefficient, total surviving rate, total mortality rate, natural mortality rate, fishing mortality rate and exploitation rate were estimated by the model of von Bertalanffy, Key and Beverton Holt etc. The exploitation status of the stocks was also discussed. In view of the existing problems, the authors make some suggestions on the fishery management.
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Keywords:
- Fishery biology /
- Commercial fishes /
- Resources assessment /
- The Yangtze River
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