dc.creatorPeruquetti, Rui Carlos
dc.creatorLama, Marco Antônio Del
dc.date2019-08-14T14:02:01Z
dc.date2019-08-14T14:02:01Z
dc.date2003-12
dc.date.accessioned2023-09-27T21:36:31Z
dc.date.available2023-09-27T21:36:31Z
dc.identifier1806-9665
dc.identifierhttp://dx.doi.org/10.1590/S0085-56262003000400008
dc.identifierhttps://locus.ufv.br//handle/123456789/26585
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8963406
dc.descriptionTwo populations of the wasp Trypoxylon rogenhoferi Kohl, 1884 from São Carlos and Luís Antônio, State of São Paulo, Brazil, were observed and sampled from May 1999 to February 2001 using trap-nests. This mass-provisioning wasp was used to test some aspects of optimal sex allocation theory. Both populations fit all the predictions of the models of Green and Brockmann and Grafen. Maternal provisions determined the size of each offspring, and females allocated well-stocked brood cells to daughters, the sex that benefits most being large. This strategy resulted in a difference in size between the sexes. In São Carlos, female weight at emergence was 1.18 times that of males, in Luís Antônio this value was 1.13. The brood cell volume was correlated with both wing length and weight at emergence in both sexes, and the chance that a given brood cell contained a male offspring decreased with increased brood cell volume. In T. rogenhoferi female body size was related to fitness. Larger females were able to collect more mass of spiders per day, the spiders they captured were heavier, and they provisioned more brood cells per day. They also produced larger daughters. For males, no relationship between body size and fitness was found, but the data were scarce. Since the patterns of provisioning were variable among different females in both study sites, it is possible that the females not follow a unique strategy for sex allocation. The sex ratio and/or investment ratio in the São Carlos population was female-biased and in Luís Antônio, male-biased. In spite of the influence of trap-nests diameters on male production in Luís Antônio, there is some evidence that in São Carlos population the local availability of prey and/or lower rate of parasitism may be major forces in determining the observed sex ratio, but further studies are necessary to verify such hypothesis.
dc.formatpdf
dc.formatapplication/pdf
dc.languagepor
dc.publisherRevista Brasileira de Entomologia
dc.relationv 47, n. 04, p. 581- 588, dez. 2003
dc.rightsOpen Access
dc.subjectBody size
dc.subjectCerrado
dc.subjectMass provisioning
dc.subjectSex ratio
dc.subjectTrap-nesting wasp
dc.titleAlocação sexual e seleção sexo-dependente para tamanho de corpo em Trypoxylon rogenhoferi Kohl (Hymenoptera, Sphecidae)
dc.typeArtigo


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