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Mating strategies and monogamy in a territorial breeding anuran, Rana dalmatina: a result of sexual conflict?

Abstract : In anurans, sexual conflict of interest between the sexes over the mating system should be exacerbated by external fertilization and male-biased sex-ratio. However, the agile frog Rana dalmatina exhibits numerous monogamous characters despite a lack of parental care. Each caller was found to defend a distinct territory but, upon the female arrival, the frequency of calling males decreased. The number of observed amplexus and the number of clutches were strictly equal to the number of females. Examining sexual differences in the optimal mating system, sexual parasitism (4.2 %), synchronous polyandry (5.2 % of the clutches) and successive polygyny (4.2 %) were found as alternative strategies. Genetic polyandry was evidenced in 18 % of the clutches. Satellite activities are related to the increase of competitive interactions and result in a strong female harassment. Thus, sexual conflict influenced the development of alternative strategies. These results suggest that female multiple amplexus may be regarded as a forced mating strategy resulting in a coercive polyandry. In contrast, resulting both from the male territorial behavior and from the synchronous arrival of females, the prevalent monoandrous mating system should reduce the sexual antagonism.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01345379
Contributor : Umr6552 Ethos <>
Submitted on : Wednesday, July 13, 2016 - 3:37:48 PM
Last modification on : Thursday, January 9, 2020 - 4:08:03 PM

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  • HAL Id : hal-01345379, version 1

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Thierry Lodé. Mating strategies and monogamy in a territorial breeding anuran, Rana dalmatina: a result of sexual conflict?. Alytes, International Society for the Study and Conservation of Amphibians, 2009, 27 (2), pp.37-48. ⟨hal-01345379⟩

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