Multiple paternity in<Emphasis Type="Italic"> Rana dalmatina</Emphasis>, a monogamous territorial breeding anuran |
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Authors: | Email author" target="_blank">Thierry?LodéEmail author David?Lesbarrères |
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Institution: | (1) Laboratoire dEcologie Animale, Université dAngers, 2 bd Lavoisier, 49045 Angers cédex, France |
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Abstract: | Polyandry and sperm competition in anurans have rarely been documented. We investigated the genetic paternity inferred from allozyme variations in 650 tadpoles from four natural ponds in a territorial breeding anuran, Rana dalmatina. Multiple paternity was demonstrated, although R. dalmatina is regarded as a monogamous species. Polyandrous mating was not a common event, occurring only in 17.9% of clutches, with no significant differences among clutches. The proportions of tadpoles fathered by a second male did not significantly differ among ponds, showing that multipaternity was not restricted to a single site. Such a polyandry may result from synchronous multiple amplexus and should reduce the heterozygote deficit related to the breeding-pond fidelity usually exhibited by most anurans. |
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