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Master Thesis

Evaluation of the impact of Atlantic salmon ecological restoration in the Garonne-Dordogne basin thanks to DNA fingerprints

Abstract : This study is the first study using pedigree information established by DNA fingerprinting in a restoration program, here Atlantic salmon in the Dordogne-Garonne rivers, at a so large scale worldwide. The period covers 11 years of restoration from 2008 to 2019. It considers a very large data set composed of the pedigree of 10290 individuals genotyped at 9 DNA microsatellite markers and the information provided by the restocking of nearly 15 million individuals. The use of DNA parentage assignment provides unambiguous information to evaluate the impact of Public support in the conservation of biodiversity. Main results were that: the stocking strategy at fry stage was the more efficient, one generation in captivity does not decrease return rate, the increase of inbreeding through the rearing process is limited and mostly determined at the creation of the F1 generation. The access to the pedigree allows also to establish that more than 60 % of the F0 parents were originated from the hatchery process, this figure confirming the need to apply adapted breeding practices minimizing the risk of inbreeding. Finally, the recent increase of the proportion of wild born individuals in the last two years is favorable to hypothesize that the restauration program has a significant effect to establish a perennial and sustainable population. The MIGADO stocking program also cumulate expertise and develop specific know-how usable also for other restocking programs to audit, to monitor and to improve restoration of endangered populations or species in using genomic information.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-02975357
Contributor : Agrocampus Ouest <>
Submitted on : Thursday, October 22, 2020 - 4:04:30 PM
Last modification on : Sunday, January 10, 2021 - 3:08:50 AM
Long-term archiving on: : Saturday, January 23, 2021 - 7:46:31 PM

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  • HAL Id : dumas-02975357, version 1

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Louarn Fauchet. Evaluation of the impact of Atlantic salmon ecological restoration in the Garonne-Dordogne basin thanks to DNA fingerprints. Life Sciences [q-bio]. 2020. ⟨dumas-02975357⟩

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