Conservation génétique du chevalier cuivré (Moxostoma hubbsi) : effet tampon du temps de génération sur l'érosion de la diversité génétique

Authors: Lippé, Catherine
Advisor: Bernatchez, Louis; Dumont, Pierre
Abstract: Increasing human activities have caused destruction and fragmentation of natural habitats, leading to the extinction of many species. Since genetic diversity plays an important role in the evolutionary potential of a species, conservation genetics is increasingly providing adequate tools needed towards the preservation of biodiversity. The Copper redhorse (Moxostoma hubbsi), an endangered species of Québec, has an extremely restricted distribution, limited to the Richelieu River and a short section of the St.Lawrence River. Surprisingly, this unique and ageing remaining population exhibits a high level of genetic diversity without sign of inbreeding, where recent demographic history and effective population size estimates suggest a gradual demographic decline scaled on a large time period. Our results clearly demonstrate the potential of genetic data towards effective conservation, as well suggesting that long generation times may act as a buffering effect contributing to reduce the pace of genetic diversity erosion in threatened species.
Document Type: Mémoire de maîtrise
Issue Date: 2006
Open Access Date: 12 April 2018
Permalink: http://hdl.handle.net/20.500.11794/18744
Grantor: Université Laval
Collection:Thèses et mémoires

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