Abstract

The related nematodes Pristionchus pacificus and Caenorhabditis elegans both eat bacteria for nutrition and are therefore competitors when they exploit the same bacterial resource. In addition to competing with each other, P. pacificus is a predator of C. elegans larval prey. These two relationships together form intraguild predation, which is the killing and sometimes eating of potential competitors. In killing C. elegans, the intraguild predator P. pacificus may achieve dual benefits of immediate nutrition and reduced competition for bacteria. Recent studies of P. pacificus have characterized many aspects of its predatory biting behaviour as well as underlying molecular and genetic mechanisms. However, little has been explored regarding the potentially competitive aspect of P. pacificus biting C. elegans. Moreover, aggression may also be implicated if P. pacificus intentionally bites C. elegans with the goal of reducing competition for bacteria. The aim of this review is to broadly outline how aggression, predation, and intraguild predation relate to each other, as well as how these concepts may be applied to future studies of P. pacificus in its interactions with C. elegans.

 抽象的

相关的线虫太平洋Pristionchus pacificus和秀丽隐杆线虫（Caenorhabditis elegans）都以细菌为食，因此在利用相同的细菌资源时是竞争者。除了相互竞争之外，太平洋对虾还是线虫幼虫的捕食者。这两种关系共同形成了行会内的掠夺，即杀死甚至有时吃掉潜在的竞争对手。在杀死秀丽隐杆线虫时，群体内的捕食者太平洋对虾可能会获得即时营养和减少细菌竞争的双重好处。最近对太平洋对虾的研究已经描述了其捕食性撕咬行为的许多方面以及潜在的分子和遗传机制。然而，关于太平洋对虾咬线虫的潜在竞争方面却鲜有探讨。此外，如果太平洋对虾为了减少细菌竞争而故意叮咬秀丽隐杆线虫，也可能涉及攻击行为。本综述的目的是大致概述攻击、捕食和行内捕食之间的相互关系，以及如何将这些概念应用于太平洋对虾与线虫相互作用的未来研究。