...
  • 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 >The effect of management choices on the sustainability and economic performance of a mixed fishery: a simulation study
【24h】

The effect of management choices on the sustainability and economic performance of a mixed fishery: a simulation study

机译：管理选择对混合渔业可持续性和经济绩效的影响：模拟研究

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

Alternative management scenarios were evaluated in a simulation framework that mimicked the recent exploitation of sole and plaice in the North Sea. A large proportion of plaice is taken as bycatch of the beam trawl fleet targeting sole, yet current management of the two stocks assumes no interaction in their exploitation. The evaluation criteria included biological and economic sustainability, and stability in the management measures. The fishery was assumed to respond to management restrictions by dropping the least profitable trips. We investigated two contrasting management strategies, single-species total allowable catches, and effort regulation. Under the assumptions made, the latter strategy performed better. The results suggest that, given assessment error and bias, a strategy that accounts for the mixed nature of a fishery and that occasionally results in perceived underexploitation may work best. Stability in fishing mortality reinforces itself, through lower assessment bias, and management corrections become less frequent. The common assumption in many stock assessments in EC waters that fishing mortality in the most recent year should resemble the value obtained in previous years ("shrinkage") had a negative effect on the stability of control measures.
机译：在模拟框架中评估了替代管理方案，该框架模仿了北海最近对鞋底和的开发。束拖网捕捞船队以唯一的目标为副产品，但目前的管理假设这两种种群在开采过程中没有相互作用。评价标准包括生物和经济可持续性以及管理措施的稳定性。假设该渔业通过减少利润最低的旅行来应对管理限制。我们研究了两种截然不同的管理策略，即单一物种的总允许捕捞量和努力量调节。在做出的假设下，后一种策略的效果更好。结果表明，考虑到评估误差和偏倚，考虑到渔业混杂性质并偶尔导致人们认为开发不足的战略可能效果最好。通过降低评估偏倚，捕鱼死亡率的稳定性增强了自身，并且管理调整的频率降低了。在欧共体水域的许多种群评估中，普遍的假设是，最近一年的捕捞死亡率应与前几年的捕捞死亡率相似（“收缩”），对控制措施的稳定性产生负面影响。

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