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Borsa Philippe, Blanquer A., Berrebi P. (1997). Genetic structure of the flounders Platichthys flesus and P. stellatus at different geographic scales. Marine Biology, 129, p. 233-246. ISSN 0025-3162.

Titre du document
Genetic structure of the flounders Platichthys flesus and P. stellatus at different geographic scales
Année de publication
1997
Type de document
Article
Auteurs
Borsa Philippe, Blanquer A., Berrebi P.
Source
Marine Biology, 1997, 129, p. 233-246 ISSN 0025-3162
The genetic structure of the flounders Platichthys flesus L. and P. stellatus Pallas was investigated on different spatial scales trough analysis of allozyme variation at 7 to 24 polymorphic loci in samples collected from different regions (Baltic Sea, North Sea, Brittany, Portugal, western Mediterranean, Adriatic Sea, Aegean Sea and Japan) in 1984 to 1987. No geographic variation was evident within a region. Some pattern of differentiation by distance was infered within the Atlantic, while the Mediterranean comprised three geographically isolated populations and was itself geographycally isolated from the Atlantic (fixed allele differences at up to three loci were found among P. flesus populations from the Atlantic, the western Mediterranean, the Adriatic Sea, the Aegean Sea and also P. stellatus from the coast of Japan). Sea temperature during the reproductive period probably acts as a barrier to gene flow between populations. Genetic distances among European flounder populations (P. flesus) were higher than, or of the same magnitude as, the genetic distance between Pacific (P. stellatus) and European flounder populations, suggesting that P. flesus is paraphyletic and/or there is no phylogenetic basis to recognising P. stellatus as a different species. The divergence between P. flesus and P. stellatus was thus inferred to be more recent than the divergence between the present P. flesus populations from the NE Atlantic and eastern Mediterranean. The eastern Mediterranean populations are thought to originate from the colonisation of the Mediterranean by a proto-P. flesus/P. stellatus ancestor, whereas the present western Mediterranean population has undergone a more recent colonisation event by P. flesus... (D'après résumé d'auteur)
Plan de classement
Poissons [034BIOVER01]
Descripteurs
POISSON MARIN ; ZOOGEOGRAPHIE ; POLYMORPHISME ENZYMATIQUE ; DIVERSITE SPECIFIQUE ; STRUCTURE GENETIQUE
Localisation
Fonds IRD [F B010012063]
Identifiant IRD
fdi:010012063
Contact