首页> 美国卫生研究院文献>Ecology and Evolution >Temperature effects on ballistic prey capture by a dragonfly larva
【2h】

Temperature effects on ballistic prey capture by a dragonfly larva

机译:温度对蜻蜓幼虫捕获弹道猎物的影响

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Understanding the effects of temperature on prey–predator interactions is a key issue to predict the response of natural communities to climate change. Higher temperatures are expected to induce an increase in predation rates. However, little is known on how temperature influences close‐range encounter of prey–predator interactions, such as predator's attack velocities. Based on the speed–accuracy trade‐off concept, we hypothesized that the increase in predator attack velocity by increasing temperature reduces the accuracy of the attack, leading to a lower probability of capture. We tested this hypothesis on the dragonfly larvae Anax imperator and the zooplankton prey Daphnia magna. The prey–predator encounters were video‐recorded at high speed, and at three different temperatures. Overall, we found that (1) temperature had a strong effect on predator's attack velocities, (2) prey did not have the opportunity to move and/or escape due to the high velocity of the predator during the attack, and (3) neither velocity nor temperature had significant effects on the capture success. By contrast, the capture success mainly depended on the accuracy of the predator in capturing the prey. We found that (4) some 40% of mistakes were undershooting and some 60% aimed below or above the target. No lateral mistake was observed. These results did not support the speed–accuracy trade‐off hypothesis. Further studies on dragonfly larvae with different morphological labial masks and speeds of attacks, as well as on prey with different escape strategies, would provide new insights into the response to environmental changes in prey–predator interactions.
机译:了解温度对猎物与捕食者之间相互作用的影响是预测自然群落对气候变化的反应的关键问题。预计较高的温度会引起捕食率的增加。但是,人们对温度如何影响近距离接触猎物-食肉动物的相互作用(例如食肉动物的攻击速度)知之甚少。基于速度-精度的权衡概念,我们假设通过提高温度来提高捕食者的攻击速度会降低攻击的准确性,从而降低捕获的可能性。我们在蜻蜓幼虫Anax imperator和浮游生物捕食者Daphnia magna上验证了这一假设。掠食者和掠食者的s会在三个不同的温度下以高速录制。总的来说,我们发现(1)温度对掠食者的攻击速度有很强的影响;(2)由于掠食者在攻击过程中的高速度,猎物没有机会移动和/或逃逸,并且(3)两者均没有速度或温度对捕获成功有重大影响。相反,捕获成功与否主要取决于捕食者捕获猎物的准确性。我们发现(4)大约40%的错误是未达到目标的,而大约60%的目标是低于或高于目标。没有观察到横向错误。这些结果不支持速度精度折衷假设。对具有不同形态唇面罩和攻击速度的蜻蜓幼虫以及具有不同逃逸策略的猎物的进一步研究,将为了解猎物与食肉动物相互作用对环境变化的反应提供新的见解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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