Morphologic and genetic characterisation of Corsican and Sardinian trout with comments on Salmo taxonomy

Bo Delling, Andrea Sabatini (), Stéphane Muracciole (), Christelle Tougard () and Patrick Berrebi ()
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Bo Delling: NRM - Swedish Museum of Natural History
Andrea Sabatini: UniCa - Università degli Studi di Cagliari = University of Cagliari = Université de Cagliari
Stéphane Muracciole: Fédération de la Corse pour la Pêche et la Protection des Milieux Aquatiques - Fédération Corse
Christelle Tougard: UMR ISEM - Institut des Sciences de l'Evolution de Montpellier - Cirad - Centre de Coopération Internationale en Recherche Agronomique pour le Développement - EPHE - École Pratique des Hautes Études - PSL - Université Paris Sciences et Lettres - UM - Université de Montpellier - Institut de recherche pour le développement [IRD] : UR226 - CNRS - Centre National de la Recherche Scientifique
Patrick Berrebi: UMR ISEM - Institut des Sciences de l'Evolution de Montpellier - Cirad - Centre de Coopération Internationale en Recherche Agronomique pour le Développement - EPHE - École Pratique des Hautes Études - PSL - Université Paris Sciences et Lettres - UM - Université de Montpellier - Institut de recherche pour le développement [IRD] : UR226 - CNRS - Centre National de la Recherche Scientifique

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Abstract: Both morphological and molecular data are presented and discussed for indigenous Salmo sp. from Corsica and Sardinia, here called Tyrrhenian trout. For comparison, morphological data obtained from museum specimens, including the Algerian S. macrostigma, are discussed in the light of recent and new molecular findings. In total, 29 measurements and 20 meristic characters were taken from each specimen. Out of the meristic characters, 12 were obtained by means of X-ray. One important morphometric character in the present study is the size of the head measured from premaxilla to posterior margin of preoperculum. This character was particularly stable in all Tyrrhenian trout, showing relatively large head compared to Atlantic trout and to S. macrostigma. On the contrary, other characters like body punctuations, black and white edges of fins, body depth or number of epurals in the caudal skeleton are quite polymorphic. In certain meristic characters, range of variation of Tyrrhenian trout even exceeds that of the extensive comparative material. Each trout has been genetically characterized. New haplotypes from Tyrrhenian trout were discovered, belonging to three mitochondrial lineages viz. Adriatic, marble and Mediterranean, however, Adriatic haplotypes are dominant. Mixing morphological and genetic data, observed morphology lacks any obvious correlation to mitochondrial lineages and it is concluded that Tyrrhenian trout show no particular affinity to S. macrostigma from Algeria.

Keywords: mtDNA; brown trout; meristics; Tyrrhenian Sea; morphology (search for similar items in EconPapers)
Date: 2020-05-28
Note: View the original document on HAL open archive server: https://hal.umontpellier.fr/hal-02566709v1
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Published in Knowledge and Management of Aquatic Ecosystems, 2020, 421, pp.1-16. ⟨10.1051/kmae/2020013⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:journl:hal-02566709

DOI: 10.1051/kmae/2020013

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