Competition strategies and correlated selection on responses to polyandry in the seed beetle Callosobruchus maculatus

dc.creatorGuedes, Raul Narciso C.
dc.creatorSmith, Robert H.
dc.date2018-11-14T16:50:27Z
dc.date2018-11-14T16:50:27Z
dc.date2008-11-19
dc.date.accessioned2023-09-27T21:14:46Z
dc.date.available2023-09-27T21:14:46Z
dc.identifier13653032
dc.identifierhttp://dx.doi.org/10.1111/j.1365-3032.2008.00643.x
dc.identifierhttp://www.locus.ufv.br/handle/123456789/22559
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8957269
dc.descriptionPolyandry reflected in multiple mating with different mates is regarded as favoured by natural selection in males but not necessarily in females, where conflicting effects on fitness components can occur. The present study aims to provide empirical evidence to predict which fitness components may be affected in this sexual conflict using a species that demonstrates potential between-population variation in their resolution: the cowpea weevil Callosobruchus maculatus . Two strains showing contrasting competition outcomes (scramble × contest) and contrasting life-history strategies based on trade-offs between longevity and fecundity are crossed for subsequent selection based on larval-competition strategy, expecting the production of a correlated response to multiple (polyandrous) mating. Such a response is expected because the scramble strain shows high fecundity (and lower longevity) and would benefit from multiple mating, in contrast with the contest strain, which shows high juvenile mortality. The scramble-selected lines would evolve a response of increased fecundity and reduced longevity under multiple and potentially polyandrous mating but the contest-selected lines would not respond to multiple (polyandrous) mating. Instead, both scramble- and contest-selected lines show increased fecundity and reduced longevity with multiple (polyandrous) matings, which did not affect egg weight. Indirect benefits of multiple (polyandrous) mating appear to be relevant for lines showing contest competition among juveniles.
dc.formatpdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherPhysiological Entomology
dc.relationVolume 33, Issue 4, Pages 372- 381, December 2008
dc.rightsOpen Access
dc.subjectBruchidae
dc.subjectContest competition
dc.subjectFecundity – longevity trade-off
dc.subjectMultiple mating
dc.subjectScramble competition
dc.titleCompetition strategies and correlated selection on responses to polyandry in the seed beetle Callosobruchus maculatus
dc.typeArtigo


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