Polyandry in Podocnemis unifilis (Pleurodira; Podocnemididae), the vulnerable yellow-spotted Amazon River turtle

In: Amphibia-Reptilia
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  • 1 1Universidade Federal do Amazonas, Departamento de Biologia, Laboratório de Evolução e Genética Animal_LEGAL, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, 69077-000, Manaus, AM, Brazil; Universidade Estadual do Amazonas, Av. Djalma Batista, 2470, Chapada, CEP 69050-010, Manaus, AM, Brazil
  • 2 2Universidade Federal do Amazonas, Departamento de Biologia, Laboratório de Evolução e Genética Animal_LEGAL, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, 69077-000, Manaus, AM, Brazil
  • 3 3Universidade Federal do Amazonas, Departamento de Biologia, Laboratório de Evolução e Genética Animal_LEGAL, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, 69077-000, Manaus, AM, Brazil
  • 4 4Universidade Federal do Amazonas, Departamento de Biologia, Laboratório de Evolução e Genética Animal_LEGAL, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, 69077-000, Manaus, AM, Brazil

Abstract

We used eight microsatellite loci to investigate the mating system in P. unifilis. DNA samples were collected from 66 hatchlings sampled from six nests on a central Amazon River beach near Barreirinha, Amazonas, Brazil. We found that P. unifilis females exhibited a promiscuous mating system (polyandry) with all nests being fathered by at least two males. The presence of multiple males contributing to each clutch was ascertained by the presence of at least two extra alleles in multilocus genotypes in each nest. Our data demonstrate that polyandry seems to be the prevalent system of mating in this endangered species.

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