...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Born to kill: Predatory functional responses of the littoral amphipod Echinogammarus marinus Leach throughout its life history
【24h】

Born to kill: Predatory functional responses of the littoral amphipod Echinogammarus marinus Leach throughout its life history

机译：生来被杀：沿海两栖纲棘纲棘鱼浸出物在其整个生命历史中的掠食性功能性反应

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

Studies of predator-prey interactions, and in particular the derivation of functional responses, have typically focussed on adults or single life-history stages, with subsequent food web analyses often simply using average body sizes or assuming that all conspecifics are equal. Such limited consideration of ontogeny in the context of predatory functional responses may have important implications for our understanding of community structure and function. Further, large predators may be physically restricted in their ability to feed on very small prey individuals and/or avoid such predation due to its limited energetic return. Here, we elucidate the predatory nature and impact of the marine intertidal amphipod, Echinogammarus marinus, throughout its ontogeny, towards a prey species, the isopod jaera nordmanni. Firstly, we found J. nordmanni in the guts of field caught E. marinus, from juveniles through to adults of the latter, indicating that ￡ marinus may be predatory throughout ontogeny. Secondly, juvenile, sub-adult and adult ￡ marinus exhibited Type II functional responses towards size-matched J. nordmanni prey. In addition, the largest adult E. marinus fed on the smallest J. nordmanni, again with Type II functional responses, in both homo- and heterogeneous habitat. Thus, the prey do not benefit from any ontogenetic or size refuge from the predator. These findings demonstrate the significant predatory ability and potential population level impacts of E. marinus throughout its ontogeny, which may determine local prey species exclusion and persistence. Determining the functional responses of predators throughout their ontogeny may thus improve our understanding and prediction of their community impacts.
机译：捕食者与猎物之间相互作用的研究，尤其是功能反应的推导，通常集中于成年或单一的生活史阶段，随后的食物网分析通常仅使用平均体型或假定所有同种异体都相同。在掠夺性功能性反应的背景下对个体发生的这种有限的考虑可能对我们对社区结构和功能的理解具有重要意义。此外，大型捕食者由于其有限的精力充沛的返回而可能在物理上限制其以很小的猎物为食的能力和/或避免这种捕食。在这里，我们阐明了海洋潮间两栖动物纲棘纲纲棘纲的掠食性和影响，在整个个体发育过程中，它们对猎物物种，即等足类jaera nordmanni。首先，我们在捕捞的海螯虾的肠道中发现了J. nordmanni，从幼年到后者的成年，这表明海螯虾在整个个体发育中可能是掠食性的。其次，少年，亚成年和成年￡对大小匹配的J. nordmanni猎物表现出II型功能性反应。此外，在同质和异质生境中，最大的成年海螯虾以最小的诺德曼蝗虫为食，再次具有II型功能性反应。因此，猎物不会从捕食者的任何个体遗传或大小庇护中受益。这些发现表明，海马肠的显着捕食能力和潜在种群水平影响在其整个个体发育过程中可能决定了当地猎物物种的排斥和持久性。确定掠食者在其整个个体发育过程中的功能反应可能会提高我们对它们的社区影响的理解和预测。

著录项

  • 来源
  • 作者

    Mhairi E. Alexander; Jaimie T.A. Dick; Nessa E. OConnor;

  • 作者单位

    School of Biological Sciences, Queen's University Belfast, MBC, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, UK;

    School of Biological Sciences, Queen's University Belfast, MBC, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, UK,Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa;

    School of Biological Sciences, Queen's University Belfast, MBC, 97 Lisburn Road, Belfast, BT9 7BL, Northern Ireland, UK;

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

    amphipod; functional response; habitat complexity; ontogeny; predation;

    机译：两栖动物功能反应;生境复杂性;个体发育掠夺;

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