Last update: : Monday 24 October 2016, by
Par : Michaël Beaulieu, Zoological Institute & Museum, University of Greifswald, Germany
Date : Jeudi 10 novembre 2016 à 13h
Lieu : CNRS, Amphithéâtre Marguerite Perey, bâtiment 01
In ecological studies, the presence of conspecifics is often considered in terms of social stress. In contrast, several laboratory studies have shown that the presence of conspecifics can extend longevity, thereby suggesting that conspecifics do not necessarily represent a source of stress but may enhance fitness components. Here, I postulate that the effects of social conditions on fitness components are mediated by variation in oxidative status. Even though oxidative status has recently received much attention in view of abiotic environmental conditions, it has rarely been considered in view of the social environment experienced by animals. However, as oxidative status appears to be involved in the resolution of life-history trade-offs, it is likely to mediate the effects of social conditions on fitness components. Moreover, studies conducted in humans have revealed that social conditions affected telomeres, which length depends on oxidative status. Overall, this suggests that variation in oxidative status is likely to mediate the effects of social conditions on fitness components. During this seminar, I will present evidence of the effects of social conditions on markers of oxidative status from the literature and from my own research. I will highlight the gaps in this emerging research field, and make some suggestions regarding future research avenues.