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Intra‐ and inter‐population allometry of the genitalia of S phex latreillei L epeletier de S aint F argeau 1831 ( H ymenoptera: S phecidae) supports the one‐size‐fits‐all hypothesis
Author(s) -
Zamorano Jorge,
Chiappa Elizabeth
Publication year - 2015
Publication title -
austral entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.502
H-Index - 39
eISSN - 2052-1758
pISSN - 2052-174X
DOI - 10.1111/aen.12119
Subject(s) - allometry , biology , sphecidae , sexual selection , hymenoptera , zoology , stabilizing selection , intraspecific competition , mating , evolutionary biology , ecology , genetic variation , biochemistry , gene
Sexual selection could act differently in the responses observed in the genitalia and somatic traits of arthropods related to variation and allometric relationships, generating divergence on the variation at the interspecific level. At the intraspecific level, it has been observed that the allometric relationships of the genitalia in males have markedly lower values than those recorded for somatic features, thus providing support to the one‐size‐fits‐all hypothesis, as a result of fits during mating interaction. Throughout this paper, we evaluate the allometry and variation in genitalia and somatic structures, between and within populations of the C hilean wasp S phex latreillei L epeletier de S aint F argeau 1831. We found significantly lower allometric variation for genitalia in both populations compared with the allometry of somatic traits. These results support the hypothesis of standardized sizes in arthropod genitalia as a result of the action of sexual selection by fit mechanisms during copulation.