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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Ontogenetic stage-specific reciprocal intraguild predation

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Fonseca, Morgana Maria [1] ; Pallini, Angelo [1] ; Lima, Eraldo [1] ; Janssen, Arne [2]
Total Authors: 4
[1] Univ Fed Vicosa, Dept Entomol, Vicosa, MG - Brazil
[2] Univ Amsterdam, IBED, Evolutionary & Populat Biol, Sci Pk 904, NL-1098 XH Amsterdam - Netherlands
Total Affiliations: 2
Document type: Journal article
Source: Oecologia; v. 188, n. 3, p. 743-751, NOV 2018.
Web of Science Citations: 0

The size or stage of interacting individuals is known to affect the outcome of ecological interactions and can have important consequences for population dynamics. This is also true for intraguild predation (the killing and eating of potential competitors), where the size or ontogenetic stage of an individual determines whether it is the intraguild predator or the intraguild prey. Studying size- or stage-specific interactions is therefore important, but can be challenging in species with complex life histories. Here, we investigated predatory interactions of all feeding stages of the two predatory mite species Neoseiulus californicus and Phytoseiulus macropilis, both of which have complex life cycles, typical for predatory arthropods. Populations of these two species compete for two-spotted spider mites, their prey. We evaluated both the capacity to kill stages of the other predator species and the capacity to benefit from feeding on these stages, both prerequisites for the occurrence of intraguild predation. Ontogeny played a critical role in the occurrence of intraguild predation. Whereas the juveniles of P. macropilis developed from larva until adulthood when feeding on N. californicus eggs, interestingly, adult female P. macropilis did not feed on the smaller stages of the other species. We furthermore show that intraguild predation was reciprocal: both juveniles and adult females of N. californicus preyed on the smallest stages of P. macropilis. These results suggest that a proper analysis of the interactions between pairs of species involved in intraguild predation should start with an inventory of the interactions among all ontogenetic stages of these species. (AU)

FAPESP's process: 14/50871-0 - INCT 2014: National Institute of Science and Technology of Semiochemicals in Agriculture
Grantee:José Roberto Postali Parra
Support type: Research Projects - Thematic Grants