...
  • 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 >Habitat Use And The Effect Of Shrimp Trawling On Fish And Invertebrate Communities Over The Northern Gulf Of Mexico Continental Shelf
【24h】

Habitat Use And The Effect Of Shrimp Trawling On Fish And Invertebrate Communities Over The Northern Gulf Of Mexico Continental Shelf

机译：栖息地的使用和虾拖网对墨西哥湾北部大陆架鱼类和无脊椎动物群落的影响

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

The goals of this study were to characterize habitat-specific fish and invertebrate community structure over sand, shell-rubble, and natural reef substrata, and to assess the effects of trawling on the sand and shell-rubble habitats and their associated communities during quarterly trawl surveys over a 2-year period. Fish and invertebrate communities differed significantly among habitat types [analysis of similarities (ANOSIM); Global R = 0.436, p < 0.001), and with respect to trawling exposure (ANOSIM; Global R = 0.128, p < 0.001). Habitat characteristics were quantified from video transects sampled with a remotely operated vehicle, and included percentage coverage of tubeworms, bryozoans, anemones, corals, and algae, significantly affecting fish community structure. Diversity indices differed among habitats, with the highest Shannon diversity (H') and Pielou's evenness (J') over shell-rubble, specifically non-trawled shell-rubble. In addition, higher values of H' and J' were found over trawled sand relative to non-trawled sand habitats. Length frequency distributions of several abundant fish species showed truncated size distributions over trawled and non-trawled habitats and were both habitat- and species-specific. The study describes habitat-specific differences in community structure, highlighting the differences between trawled and non-trawled areas on the northern Gulf of Mexico continental shelf.
机译：这项研究的目的是表征沙，贝砾和天然礁石基质上特定于栖息地的鱼类和无脊椎动物群落结构，并评估拖网在拖网期间对沙和贝砾栖息地及其相关群落的影响在2年内进行调查。在生境类型之间，鱼类和无脊椎动物群落差异显着[相似性分析（ANOSIM）；整体R = 0.436，p <0.001），并且对于拖网作业（ANOSIM；整体R = 0.128，p <0.001）。栖息地特征是通过远程操作车辆采样的视频样带量化的，包括覆盖率显着影响鱼类群落结构的块茎，苔藓，海葵，珊瑚和藻类的百分比。不同生境之间的多样性指数有所不同，在壳砾石上，特别是在非拖网壳砾石上，香农多样性（H'）和Pielou均匀度（J'）最高。此外，相对于非拖网沙生境，拖网沙中的H'和J'值更高。几种丰富鱼类的长度频率分布在拖网和非拖网的生境中显示出截短的大小分布，并且是特定于生境和物种的。这项研究描述了社区结构中特定于栖息地的差异，突出了墨西哥湾北部大陆架上被拖网和非拖网区域之间的差异。

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