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Morphological and molecular evidence of three species of pikes Esox spp. (Actinopterygii, Esocidae) in France, including the description of a new species


By Donald - Posted on 15 August 2015

TitleMorphological and molecular evidence of three species of pikes Esox spp. (Actinopterygii, Esocidae) in France, including the description of a new species
Publication TypeJournal Article
Year of Publication2014
AuthorsDenys GPJ, Dettai A, Persat H, Hautecœur M, Keith P
JournalComptes Rendus Biologie
Volume337
Issue9
Pagination521-34
Date Published2014 Sep
ISSN1768-3238
KeywordsAnimals, Chimera, Classification, DNA, Esocidae, France, Molecular Sequence Data, Pigmentation, Population, Species Specificity, Terminology as Topic
Abstract

This integrative taxonomy study of French pikes compares morphological characters and molecular sequence data (mitochondrial COI and nuclear Plagl2 genes). In addition to the expected E. lucius, DNA sequences and morphology both support a new species in France, E. aquitanicus sp. nov. from the Charente to the Adour drainages. It is characterized by a color pattern of sides with narrow 1-1.5-scale-wide oblique vertical bands, conferring it a marbled coat, a snout only 0.9 times larger than the postorbital length, an anal fin basis 1.1-1.2 times larger than the caudal peduncle length, 101 to 121 lateral scales, 53 to 57 vertebrae, as well as 24 diagnostic sites in the COI gene and 3 in the Plagl2 gene. Partial COI sequences (131 bp) from modern and historical specimens indicate also the presence of E. cisalpinus and E. lucius during the 19th century in Lake Geneva. Morphological and molecular data points to a possible hybridization between E. lucius with both other local pike species, representing a risk for them. Their endangerment status should be evaluated rapidly in order to take conservation measures.

DOI10.1016/j.crvi.2014.07.002
Alternate JournalC. R. Biol.
PubMed ID25242691