La répartition des populations piscicoles en Creuse (Limousin), l’apport géographique des pêches électriques en tête de bassin

Abstract : The department of the Creuse is located in the highlands of the French Central Massif, where the headwater catchments constitute a reference area for the ecologically healthy small watercourses. Electrofishing is used here in a geographical way in order to chart the repartition of fish species representative of a certain water quality, covering a period of seven years and a large area of 5 600 km². Over the years, populations of the least sensitive species (chub and dace) progress towards upstream waters, while the most sensitive species (minnows) regress and only subsist in the headwaters. These species are indicators of a degradation of physicochemical or sedimentary conditions moving upstream.
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Submitted on : Monday, April 1, 2019 - 2:05:36 PM
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Laurent Touchart, Yann Clave. La répartition des populations piscicoles en Creuse (Limousin), l’apport géographique des pêches électriques en tête de bassin. Norois, Presses universitaires de Rennes, 2009, pp.23-36. ⟨https://journals.openedition.org/norois/2857⟩. ⟨10.4000/norois.2857⟩. ⟨hal-02086537⟩

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