Fonseca Morgana Maria, Montserrat Marta, Guzmán Celeste, Torres-Campos Inmaculada, Pallini Angelo, Janssen Arne
Department of Entomology, Federal University of Viçosa, Viçosa, MG, Brazil.
Institute for Mediterranean and Subtropical Horticulture "La Mayora" (IHSM-UMA-CSIC), 29750, Algarrobo-Costa, Málaga, Spain.
Exp Appl Acarol. 2017 Jun;72(2):103-114. doi: 10.1007/s10493-017-0142-x. Epub 2017 Jun 1.
Intraguild predation is the combination of exploitative competition and predation among potential competitors that use similar resources. It has the potential to shape population dynamics and community structure. Although there is much empirical evidence for the occurrence of intraguild predation in natural ecosystems, the study of its effects is mainly limited to short-term microcosm experiments. There is, therefore, certain skepticism about its actual significance in nature. A relevant concern is that there is no consensus regarding criteria to evaluate the possible occurrence of intraguild predation in short-term experiments, and methodological differences may therefore underlie apparent inconsistencies among studies. Our purpose here was to evaluate existing criteria to offer guidance for the design of experiments to determine whether two species may potentially engage in intraguild predation. The criteria are based on the condition that intraguild predators need to experience immediate energetic gains when feeding on the intraguild prey. Thus, a relevant experimental design must quantify predation but also fitness benefits of feeding on the other species, i.e. increases in reproduction, somatic growth, or survival.
集团内捕食是利用相似资源的潜在竞争者之间剥削性竞争和捕食行为的结合。它有可能塑造种群动态和群落结构。尽管在自然生态系统中存在大量关于集团内捕食发生的实证证据，但对其影响的研究主要局限于短期微观实验。因此，人们对其在自然界中的实际意义存在一定的怀疑。一个相关的问题是，在短期实验中评估集团内捕食可能发生的标准尚无共识，因此方法上的差异可能是各研究之间明显不一致的原因。我们在此的目的是评估现有标准，为设计实验提供指导，以确定两个物种是否可能进行集团内捕食。这些标准基于这样的条件，即集团内捕食者在以集团内猎物为食时需要获得即时的能量收益。因此，一个相关的实验设计必须量化捕食行为，还要量化以另一个物种为食的适合度益处，即繁殖、体细胞生长或生存的增加。
