Conflict and cooperation over sex: the consequences of social and genetic polyandry for reproductive success in dunnocks

Autor(es)

Santos, Eduardo S. A. ^{[1, 2, 3]} ; Santos, Luana L. S. ^[2] ; Lagisz, Malgorzata ^{[2, 4, 5]} ; Nakagawa, Shinichi ^{[2, 4, 5]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Zool, BR-05508090 Sao Paulo, SP - Brazil

^[2] Univ Otago, Dept Zool, Dunedin 9016 - New Zealand

^[3] Univ Sao Paulo, LAGE Dept Ecol, BR-05508090 Sao Paulo, SP - Brazil

^[4] Univ New S Wales, Evolut & Ecol Res Ctr, Sydney, NSW 2052 - Australia

^[5] Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052 - Australia

• Tipo de documento: Artigo Científico
• Fonte: Journal of Animal Ecology; v. 84, n. 6, p. 1509-1519, NOV 2015.
• Citações Web of Science: 5

Resumo

Conflict and cooperation within and between the sexes are among the driving forces that lead to the evolution of mating systems. Among mating strategies, female genetic polyandry and male reproductive cooperation pose challenging evolutionary questions regarding the maintenance of systems where one sex suffers from reduced fitness. Here, we investigate the consequences of social and genetic polyandry for reproductive success of females and males in a population of the dunnock, Prunella modularis. We show that female multiple mating ameliorates the negative effects of inbreeding. We, however, found little evidence that females engage in extra-group (pair) mating with less related or more heterozygous males. Breeding in socially polyandrous groups reduced the amount of paternity lost to extra-group males, such that, on average, cobreeding and monogamous males fledged a similar number of young. Importantly, c. 30% of cobreeding male dyads were related, suggesting they could gain indirect fitness benefits. Taken together, cobreeding males achieve equivalent reproductive success to monogamous counterparts under most circumstances. Our study has revealed unexpected complexities in the variable mating system of dunnocks in New Zealand. Our results differ from the well-known Cambridge dunnock study and can help our understanding of the evolution and maintenance of various breeding systems in the animal kingdom. (AU)

• Processo FAPESP: 12/20468-4 - Libélulas (Odonata) Neotropicais: um modelo de estudo para a macro-ecologia da seleção sexual
• Beneficiário: Eduardo da Silva Alves dos Santos
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado