...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Zoological Science >Differential Responses of Two Ecologically Similar Case-Bearing Caddisfly Species to a Fish Chemical Cue: Implications for a Coexistence Mechanism
【24h】

Differential Responses of Two Ecologically Similar Case-Bearing Caddisfly Species to a Fish Chemical Cue: Implications for a Coexistence Mechanism

机译：两种生态相似的携带型CADDISFLY物种对鱼化学提示的差分反应：对共存机制的影响

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 mechanisms for the coexistence of multiple species occupying the same ecological niche are often puzzling. Predator effects on competitively superior species is one possible mechanism. In this study, we tested whether the presence of size-selective predators (fishes) acts as a mechanism for the coexistence of two species of case-bearing caddisfly larvae, Perissoneura paradoxa and Psilotreta kisoensis (Odontoceridae, Trichoptera). The larvae of these two species have similar ecological and life history traits except their body size, and they have been found to coexist only in habitats shared with predatory fishes. Experiments on intra and interspecific competition revealed that the larger Pe. paradoxa always outcompeted the smaller Ps. kisoensis in the absence of predatory fishes, suggesting that Pe. paradoxa performed intra-guild predation on Ps. kisoensis. We also conducted experiments to examine how strongly each of these species responded in terms of case repair with/without a predator chemical cue after their cases were partly dismantled. Perissoneura paradoxa exhibited a stronger case repair response in the presence of a predator chemical cue than that exhibited by Ps. kisoensis, suggesting that Pe. paradoxa is more vulnerable to fish predation, probably because their body size is in the preferred prey range of fishes. We suggest that the presence of predators works in the favor of smaller, subordinate species through size-selective predator effects, enabling these two competitive species to coexist in the same habitat.
机译：占用相同生态利基的多种物种共存的机制通常是令人费解的。捕食者对竞争性优越物种的影响是一种可能的机制。在这项研究中，我们测试了大小选择性捕食者（鱼类）是否存在作为两种病例Caddisfly幼虫共存的机制，Perissoneura Paradoxa和Psilotroeta Kisoensis（Odontoceridae，Trichoptera）。这两个物种的幼虫具有类似的生态和生命历史特征，除了身体规模，他们只发现仅在与掠夺性鱼类共享的栖息地中共存。关于内特异性竞争的实验显示较大的PE。 Paradoxa始终露出较小的PS。 kisoensis在没有掠夺性鱼类的情况下，表明pe。 Paradoxa对PS进行了基因内捕食。 kisoensis。我们还进行了实验，以检查这些物种在案件部分拆除后的情况下对案例修复有多响应了这些物种。 Perissoneura Paradoxa在捕食者化学暗量的存在下表现出比PS所呈现的更强烈的案例修复响应。 kisoensis，表明pe。 Paradoxa更容易受到鱼类捕食，可能是因为它们的体型是在优选的鱼类范围的鱼类中。我们认为，通过尺寸选择性捕食者效应，捕食者的存在使得较小，从属物种，使这两个竞争物种能够在同一栖息地共存。

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