| 长江上游龙溪河厚颌鲂种群资源的利用现状和保护 |
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| 引用本文： | 高欣,谭德清,刘焕章,王剑伟.长江上游龙溪河厚颌鲂种群资源的利用现状和保护[J].四川动物,2009,28(3). |
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| 作者姓名： | 高欣 谭德清 刘焕章 王剑伟 |
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| 作者单位： | 中国科学院水生生物研究所,武汉,430072 |
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| 基金项目： | 三峡工程生态与环境监测系统特有鱼类实验站资助项目 |
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| 摘 要： | 由于栖息地被破坏和过度捕捞等人为因素的影响,长江上游特有鱼类厚颌鲂Megalobrama pellegrini的种群资源显著减少.利用单位补充量模型进行分析,结果显示:长江上游支流龙溪河的厚颌鲂种群资源已经被过度开发,现有的捕捞强度(0.94年-1)远超过种群可承受的水平(F40%=0.18年-1,F0.1=0.20年-1和F25%=0.30年-1);繁殖潜力比为4.50%,低于25%,将造成种群的补充量不足,导致种群资源量下降;限制捕捞强度和捕捞规格是控制过度捕捞、保护种群资源的有效措施.
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| 关 键 词： | 厚颌鲂 单位补充量模型 种群 保护 |
Exploitation Status and Conservation of a Population of Megalobrama pellegrini in Longxi River in the Upper Yangtze River Basin |
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| GAO Xin,TAN Deq-ing,LIU Huan-zhang,WANG Jian-wei.Exploitation Status and Conservation of a Population of Megalobrama pellegrini in Longxi River in the Upper Yangtze River Basin[J].Sichuan Journal of Zoology,2009,28(3). |
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| Authors: | GAO Xin TAN Deq-ing LIU Huan-zhang WANG Jian-wei |
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| Institution: | Institute of Hydrobiology;Chinese Academy of Sciences;Wuhan 430072;China |
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| Abstract: | Megalobrama pellegrini is an endemic fish in the upper reaches of the Yangtze River.Populations of this species have been depleted recently due to overfishing and environmental deterioration resulting from damming.In this study,yield per recruit and spawning stock biomass per recruit models were employed to assess the exploitation status of the stock in the Longxi River,a tributary of the upper Yangtze,and determine the conservation strategies.The results indicated that the stock had been overfished far bey... |
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| Keywords: | Megalobrama pellegrini per-recruit models population conservation |
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