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séminaire – vendredi 15 novembre 2019

Male investment in sperm quality – from evolutionary ecology to ecotoxicology

Dr Fabrice Helfenstein, Institute of biology, University of Neuchâtel, Suisse

vendredi 15 novembre, amphithéâtre Monge, 11 heures

Sperm quality comprises a set of traits, which determine male fertility and hence fitness. Yet, despite strong selective pressures on sperm quality, it exhibits substantial variation at all levels : among males, within males and within ejaculates. In the last years, we have examined some of the factors that participate to maintaining such variation. Using Damaraland mole-rats and house sparrows, we explored how reproductive status and dominance on the one hand and environmental/social stressors and oxidative stress on the other hand affect sperm quality.

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Male investment in sperm quality - from evolutionary ecology to ecotoxicology

Dr Fabrice Helfenstein, Institute of biology, University of Neuchâtel, Suisse

vendredi 15 novembre, amphithéâtre Monge, 11 heures

Sperm quality comprises a set of traits, which determine male fertility and hence fitness. Yet, despite strong selective pressures on sperm quality, it exhibits substantial variation at all levels : among males, within males and within ejaculates. In the last years, we have examined some of the factors that participate to maintaining such variation. Using Damaraland mole-rats and house sparrows, we explored how reproductive status and dominance on the one hand and environmental/social stressors and oxidative stress on the other hand affect sperm quality.

titre:
Male investment in sperm quality - from evolutionary ecology to ecotoxicology
intervenant:
Fabrice Helfenstein
date:
15 novembre 2019

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