...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Progress in Oceanography >Trophic ecology of large gadiforms in the food web of a continental shelf ecosystem
【24h】

Trophic ecology of large gadiforms in the food web of a continental shelf ecosystem

机译：大陆架子生态系统食品网中的大型种植体的营养生态学

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Human activities affect continental shelves, especially due to the harvest of living marine resources. Understanding their functioning and dynamics has become a growing concern in recent decades, especially through use of trophic modelling approaches. Studying the feeding ecology of key component species also improves this understanding by providing accurate information on trophic processes, particularly the dependence on trophic pathways. This study focuses on the trophic ecology of four large gadiforms (cod, haddock, whiting and hake) found on the continental shelf of the Celtic Sea. The study combines information on recently ingested prey (gut content analysis) and a more integrated indicator of food sources (stable isotope analysis). Two size classes of each species were considered (small and large - split around 20 cm for haddock, whiting and hake and 60 cm for cod), as were shallow and deep zones. The four gadiforms show distinct feeding niches and strategies, which limit interspecific competition. Cod and haddock relied mainly on the benthic trophic pathway but differed in favouring piscivory and invertivory, respectively. Hake fed mainly on the pelagic trophic pathway, while whiting seemed to feed on both pathways. Ontogenetic shifts from invertivory to piscivory were observed for whiting in both zones and for hake and cod in the deep zone. An unexpected shift from the pelagic to the benthic trophic pathway was observed from small to large haddock in the deep zone. Taking into account the descriptions of diets made in adjacent ecosystems throughout the year, the four species show trophic plasticity towards one of the trophic pathways or the other. Differences between the shallow and deep zones were related to benthic and pelagic prey characteristics, which themselves are driven by the sedimentary and hydrological context, especially thermal stratification.
机译：人类活动影响欧式架子，特别是由于生活海洋资源的收获。了解他们的运作和动态在近几十年来令人越来越令人担忧，特别是通过使用营养型建模方法。研究关键组分物种的饲养生态也通过提供有关营养过程的准确信息，特别是对营养途径的依赖性来提高这种理解。本研究侧重于在凯尔特海的大陆架上发现的四个大型种植体（Cod，Haddock，Whiting和Hake）的营养生态学。该研究结合了关于最近摄入的猎物（肠含量分析）和更综合的食物来源指标（稳定同位素分析）。考虑了两种尺寸的每种种类的每种种类（小而大 - 为大约20厘米用于垃圾桶，Whiting和Hake和鳕鱼60厘米），浅层和深处。四个钆显示出不同的喂养利基和策略，限制了差异的竞争。 COD和黑鳕主要依赖于底栖营养途径，但分别不同于PISCIVORY和倒退。 Hake主要在骨盆营养途径上喂食，而Whiting似乎在两种途径上喂食。观察到在两个区域和深处的鳕鱼和鳕鱼中何时观察到来自vtervory对pasiscory的植入变化。从深区的小到大型地袋中观察到骨库到底栖疏通途径的意外转变。考虑到全年邻近生态系统中的饮食的描述，四种物种对其中一个营养途径或另一个物种展示了营养的可塑性。浅层和深区之间的差异与底栖和骨质猎物特性有关，它们本身由沉积和水文背景，尤其是热分层驱动。

著录项

  • 来源
    《Progress in Oceanography》 |2019年第julaauga期|105-114|共10页
  • 作者

    Day Louise; Kopp Dorothee; Robert Marianne; Le Bris Herve;

  • 作者单位

    Agrocampus Ouest Ecol & Ecosyst Hlth ESE INRA 65 Rue St Brieuc F-35042 Rennes France|IFREMER Unite Sci & Technol Halieut Lab Technol & Biol Halieut 8 Rue Francois Toullec F-56100 Lorient France;

    IFREMER Unite Sci & Technol Halieut Lab Technol & Biol Halieut 8 Rue Francois Toullec F-56100 Lorient France;

    IFREMER Unite Sci & Technol Halieut Lab Technol & Biol Halieut 8 Rue Francois Toullec F-56100 Lorient France;

    Agrocampus Ouest Ecol & Ecosyst Hlth ESE INRA 65 Rue St Brieuc F-35042 Rennes France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Celtic Sea; Feeding; Gut content; Stable isotopes; Ontogeny; Habitat comparison;

    机译：凯尔特海;喂养;肠含量;稳定同位素;组来;栖息地比较;

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