...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Distribution and diet of juvenile Patagonian toothfish on the South Georgia and Shag Rocks shelves (Southern Ocean)
【24h】

Distribution and diet of juvenile Patagonian toothfish on the South Georgia and Shag Rocks shelves (Southern Ocean)

机译：佐治亚州南部和粗石礁架子（南部海洋）上幼巴塔哥尼亚牙鱼的分布和饮食

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 distribution and diet of juvenile ( < 750 mm) Patagonian toothfish are described from four annual trawl surveys (2003-2006) around the island of South Georgia in the Atlantic sector of the Southern Ocean. Recruitment of toothfish varies inter-annually, and a single large cohort dominated during the four years surveyed. Most juveniles were caught on the Shag Rocks shelf to the NW of South Georgia, with fish subsequently dispersing to deeper water around both the South Georgia and Shag Rocks shelves. Mean size of juvenile toothfish increased with depth of capture. Stomach contents analysis was conducted on 795 fish that contained food remains and revealed that juvenile toothfish are essentially piscivorous, with the diet dominated by notothenid fish. The yellow-finned notothen, Patagonotothen guntheri, was the dominant prey at Shag Rocks whilst at South Georgia, where P. guntheri is absent, the dominant prey were Antarctic krill and notothenid fish. The diet changed with size, with an increase in myctophid fish and krill as toothfish grow and disperse. The size of prey also increased with fish size, with a greater range of prey sizes consumed by larger fish.
机译：根据南乔治亚州大西洋南部大西洋沿岸地区的四次年度拖网调查（2003年至2006年），描述了幼体（<750毫米）巴塔哥尼亚牙鱼的分布和饮食。牙鱼的招募每年变化一次，在调查的四年中，有一个大型队列占主导地位。大部分幼鱼被捕获在南乔治亚州西北部的粗砂岩架子上，随后，鱼散布到南乔治亚州和粗砂岩架子周围的深水中。幼齿鱼的平均大小随捕获深度的增加而增加。对含有食物残渣的795条鱼进行了胃内容物分析，结果表明，幼齿鱼基本上是食肉性的，其饮食以非甾体类鱼为主。黄鳍突齿牙Patagonotothen guntheri是Shag Rocks的主要猎物，而在南佐治亚州缺少P. guntheri的南猎物，主要猎物是南极磷虾和鼠齿类鱼类。饮食随着大小的变化而变化，随着牙鱼的生长和散布，Myctophid鱼和磷虾增加。猎物的大小也随着鱼的大小而增加，较大鱼消耗的猎物大小范围也更大。

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