INRA will study the river restoration impacts on biodiversity on two catchments: Scorff & Oir. Different indicators will be followed, concerning fishes but also non-target species as herbaceous plants and trees, organisms structuring river habitats and correlated to animal biodiversity.
Study of the within-spawning ground distribution and the breeding success between rivers showing different density and survival patterns (Gave d’Ossau, Nivelle).
Creation of a model based on innovative and efficient statistical methods to contribute to better fish management practices.
Description of the variability of mating systems in several wild populations using field studies and to relate this variability to environment. In a second step, we will build an individual-based modelling to predict the impact of mating systems on genetic diversity in spatially variable environments.
Identification and modelization of the metapopulation functioning, at different scales, in three regions showing biogeographical contrasted situations: Mont St Michel bay, south-Brittany, and the complex Adour-Nivelle of Gascogne gulf.
Development of microsatellites markers to infer the extent of gene flow between the two taxa of lampreys (/Lampetra fluviatilis/ and /L. planeri/and) and to measure the degree of population structure within and between some French rivers where both taxa co-occur.
Study of the effect of density (and its components: competition, crowding) on the eel’s sex-ratio, using the expression of the cytochrome P450 aromatase gene.
Integration of the new Erasmus Mundus project, called European Master in Sustainable River Management (EMSRM) in the actual master propositions of Agrocampus Rennes in Environmental Engineering
Identification of gene flow between Brown trout (Salmo trutta) populations using microsatellites markers at various scales, and study of the role of the sea-run form for genetic conservation of the species in Channel rivers. Anadromy is a life history trait crucial for structuring the genetic variability in salmonids populations. In order to understand its importance in the brown trout (Salmo trutta), we will carry a genetic diversity study, using microsatellite markers, at three geographic scales : fine scale (Mont Saint Michel Bay), regional scale (Brittany / Normandy) and high scale (Channel and Atlantic French coasts). We aim to identify gene flow between populations, and the role of the sea-run form for genetic conservation of the species in French rivers