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DEPE | Séminaires BEEPSS / BEEPSS Seminars » Multiple paternity and brood size: what to expect?

Multiple paternity and brood size: what to expect?

Last update: : Friday 5 April 2019, by Nicolas Busser

Presented by: F.S. Dobson, USIAS Fellow, IPHC-DEPE, Auburn-University USA
Date: Thursday 28th March 2019, 13:00-14:30
Place: Amphithéàtre Grünewald, Batiment 25

Most live-bearing and similar species have multiple paternity of their broods (and sometimes multiple maternity in male-pregnant species). The probability of multiple paternity depends on the number of mates that females have and the number of offspring that they produce each time they breed. Using a Bayesian framework, we developed a null model of multiple paternity to which actual values can be compared. For mammalian species, deviations from the null model may occur due to conditions in the social or ecological environments. Reptiles show a similar pattern, but fish have such large broods that most species exhibit nearly complete multiple paternity.