...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology progress series >Effect of closed areas on populations of sea star Asterias spp. on Georges Bank
【24h】

Effect of closed areas on populations of sea star Asterias spp. on Georges Bank

机译：禁区对海星天体种群的影响在乔治银行

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

High sea scallop abundances such as those in the closed areas of Georges Bank may cause predators, including sea stars, to aggregate and cause increased natural mortality rates for sea scallops. We hypothesized that sea stars are aggregated and are of larger size in areas of Georges Bank that are closed to fishing. Between 1999 and 2003, we systematically video surveyed 3809 stations (4 quadrats per station) in areas open and closed to fishing on Georges Bank. Sea stars were aggregated within the closed areas from 2000 to 2003. Sea star densities were higher in the closed areas than in the open areas during each year from 2000 to 2003. The average arm length of sea stars within the open areas was not always smaller or larger than those in the closed areas; however, average arm length estimates were influenced by the abundance of sea star recruits. Sea scallop densities were independent of sea star densities. Sea star predation influenced sea scallop densities in specific locations, as instantaneous natural mortality rates were high.
机译：扇贝丰度很高，例如乔治银行禁区中的那些，可能会导致包括海星在内的掠食者聚集并导致扇贝的自然死亡率上升。我们假设在Georges Bank禁止捕鱼的地区，海星聚集且规模较大。在1999年至2003年之间，我们系统地对在乔治银行开放和禁渔的地区的3809个站（每个站4个夸脱）进行了视频调查。从2000年到2003年，海星聚集在封闭区域内。从2000年到2003年，封闭区域的海星密度高于开放区域。开放区域内海星的平均臂长并不总是较小或大于禁区的面积；然而，平均臂长估计受到海星新兵数量的影响。海扇贝的密度与海星的密度无关。由于瞬时自然死亡率高，海星捕食会影响特定位置的扇贝密度。

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