Predator-prey body size relationships when predators can consume prey larger than themselves

Takefumi Nakazawa, Shin Ya Ohba, Masayuki Ushio

研究成果: Article同行評審

33 引文 斯高帕斯(Scopus)

摘要

As predator-prey interactions are inherently size-dependent, predator and prey body sizes are key to understanding their feeding relationships. To describe predator-prey size relationships (PPSRs) when predators can consume prey larger than themselves, we conducted field observations targeting three aquatic hemipteran bugs, and assessed their body masses and those of their prey for each hunting event. The data revealed that their PPSR varied with predator size and species identity, although the use of the averaged sizes masked these effects. Specifically, two predators had slightly decreased predator-prey mass ratios (PPMRs) during growth, whereas the other predator specialized on particular sizes of prey, thereby showing a clear positive size-PPMR relationship.We discussed how these patterns could be different from fish predators swallowing smaller prey whole.

原文English
文章編號20121193
期刊Biology Letters
9
發行號3
DOIs
出版狀態Published - 2013 六月 23

All Science Journal Classification (ASJC) codes

  • 農業與生物科學(雜項)
  • 農業與生物科學 (全部)

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