...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ICES Journal of Marine Science >Community-level impacts of trawl selectivity in the Eastern Mediterranean Sea assessed using an ecosystem modelling approach
【24h】

Community-level impacts of trawl selectivity in the Eastern Mediterranean Sea assessed using an ecosystem modelling approach

机译：使用生态系统建模方法评估东部地中海拖网选择性的社区水平影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Switching from the traditional 40- or 44-mm diamond mesh codends to 50-mm diamond mesh (D50) or 40-mm square mesh (S40) codends is known to improve the size selection for commercial species and reduce discarding in the Mediterranean demersal trawl fisheries. This change has been recommended in the General Fisheries Commission for the Mediterranean and European Commission regulations. However, ecosystem-based assessment of improved selectivity still remains a challenge, and that is the aim of this study. For this purpose, an Ecopath model was developed and used to initialize dynamic simulations in Ecosim. The simulations changed gear-specific fishing mortality rates to represent the shifting from traditional codend to alternative codends. Our results suggest that the use of D50 or S40 codends would have a positive impact on the ecosystem as a whole and on the stock status of several commercial and non-commercial groups. Mixed trophic impact analysis indicated that, for species, like red mullet, the S40 codend was significantly better than the D50 codend. This information can be useful to policymakers, particularly for the areas where red mullet is the main target species and could inform trawl mesh options in the eastern Mediterranean.
机译：已知从传统的40毫米金刚石网格（D50）或40毫米）编码（S40）编码，改善商业物种的尺寸选择，从传统的40毫米金刚石网格（D50）或40 mm）编码，并减少地中海解剖拖网中的丢弃渔业。这一变化已建议在地中海和欧洲委员会法规的一般渔业委员会中。然而，基于生态系统的改善选择性评估仍然是挑战，这是这项研究的目的。为此目的，开发了一种eCoPath模型，用于初始化Ecosim中的动态模拟。模拟改变了特定的驾驶钓鱼死亡率，以代表传统编码的转移到替代编码。我们的研究结果表明，D50或S40编码的使用将对生态系统作为整体和股票现状产生积极影响，若干商业和非商业群体的股票现状。混合营养的影响分析表明，对于种类，如红细胞，S40编码明显优于D50编码。这些信息对政策制定者有用，特别是对于红细胞是主要目标物种的领域，并且可以在东部地中海的拖网网中通知拖网网。

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