• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>CCAMLR science: journal of the Scientific Committee and the Commission for the Conservation of Antarctic Marine Living Resources >Evaluating the impact of multi-year research catch limits on overfished toothfish populations
【24h】

Evaluating the impact of multi-year research catch limits on overfished toothfish populations

机译：评估多年研究捕捞限制对过度捕捞牙鱼种群的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In stocks that have been depleted by overfishing, the benefit of additional fisheries removals for research purposes needs to be evaluated against the risk that such catches may contribute to delaying or preventing the recovery of such stocks. Through simulating a Patagonian toothfish (Dissostichus eleginoides) stock that has been subjected to varying levels of overfishing and research catches, this study shows that stocks can take decades to recover even in the absence of fishing, and relatively low levels of research catch can significantly delay the recovery of a stock. Scenarios assessed in this study indicate that, where a stock has been depleted to at or below 20% of the median unfished spawning stock biomass, research catches in excess of 0.6% of median unfished total stock biomass should be avoided to ensure that research does not significantly impact on the recovery of depleted stocks in the long term. Research catches may need to be even lower where there is uncertainty regarding the key parameters related to stock productivity, such as growth, maturity, recruitment or natural mortality rates.
机译：在因过度捕捞而枯竭的种群中，需要针对为研究目的而进行的额外捕捞渔业的效益进行评估，以防止此类捕捞可能导致延迟或阻止此类种群的恢复。通过模拟遭受过不同程度过度捕捞和研究捕捞量的巴塔哥尼亚牙鱼（Dissostichus eleginoides）种群，该研究表明，即使没有捕捞，种群也可能需要数十年的时间才能恢复，相对较低的研究捕捞量可能会大大延迟库存的回收。本研究评估的情景表明，如果某一种群的耗竭量等于或低于未捕捞产卵生物量中位数的20％，则应避免超过未捕捞种群总生物质中值的0.6％的研究捕捞量，以确保研究不会从长远来看，这对枯竭库存的回收有重大影响。如果与种群生产力相关的关键参数（例如生长，成熟度，招聘或自然死亡率）不确定，则研究捕获量可能甚至更低。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号