NDLI: Morphological distance and inter-nest distance account for intra-specific prey overlap in digger wasps (Hymenoptera: Crabronidae)

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Morphological distance and inter-nest distance account for intra-specific prey overlap in digger wasps (Hymenoptera: Crabronidae)

Content Provider	Springer Nature Link
Author	Polidori, Carlo Ballesteros, Yolanda Santoro, Davide Tormos, José Asís, Josep D.
Copyright Year	2012
Abstract	Although inter-individual diet variation is common in predatory wasp populations, the factors accounting for such variation are still largely unknown. Here, we asked if paired diet dissimilarity in three species of digger wasps correlates with morphological distance and inter-nest distance, two factors previously linked to diet partitioning in vertebrates. Results sharply differed among species and generations. All sampled populations showed significant inter-individual diet variation for prey taxa, but only in half of the cases for prey size. In one generation of two species [Bembix zonata Klug and Stizus continuus (Klug)], similar-sized wasps had similar prey taxonomic spectra (and for S. continuus also similar prey size spectra), a phenomenon which probably reduces intra-specific competition. In addition, B. zonata females nesting closer to each other had more similar prey taxonomic spectra, suggesting that distant females probably hunt on different patches that harbour different prey species. For the females of a further species (Bembix merceti Parker), pairwise size difference and inter-nest distance did not affect prey dissimilarity. Both morphological distance and inter-nest distance are potentially important in shaping the overlap of individual resource use in wasps, though probably only in certain conditions such as a highly clumped distribution of nests and size-related constraints on prey selection.
Starting Page	443
Ending Page	454
Page Count	12
File Format	PDF
ISSN	14383896
Journal	Population Ecology
Volume Number	54
Issue Number	3
e-ISSN	1438390X
Language	English
Publisher	Springer Japan
Publisher Date	2012-05-04
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Diet dissimilarity Intra-specific competition Nest distribution Prey size Wasp size Ecology Evolutionary Biology Behavioural Sciences Plant Sciences Forestry Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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