Population trends and current status of the endangered Pyrenean sculpin

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Éditeur(s) EDP Sciences
Identifiant documentaire 11-dkey/10.1051/kmae/2017017
Identifiant OAI oai:edpsciences.org:dkey/10.1051/kmae/2017017
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Auteur(s): Rafel Rocaspana,Enric Aparicio
Mots clés abundance catastrophic spate conservation measures Garonne abondance crue catastrophique Mesures de conservation Distribution
Date de publication 31/05/2017
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Source https://doi.org/10.1051/kmae/2017017
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Description
The status of Pyrenean sculpin Cottus hispaniolensis was assessed in the Spanish part of the Garonne drainage on the basis of its distribution and abundance from 2001 to 2016. Population trends showed a progressive reduction in range extension and density, exacerbated by a severe spate occurred in 2013. However, C. hispaniolensis was resilient to this natural disturbance by compensating for mortality with increasing recruitment. Both occurrence and density of Pyrenean sculpin showed a positive correlation with coarse substrates. Riverine habitat deterioration, mainly channelization, presence of dams and flow regulation are the main factors threatening sculpin populations. Several management measures are proposed.
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