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Mitochondrial haplotype variation and phylogeography of Iberian brown trout populations
Author(s) -
Machordom A.,
Suárez J.,
Almodóvar A.,
Bautista J. M.
Publication year - 2000
Publication title -
molecular ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.619
H-Index - 225
eISSN - 1365-294X
pISSN - 0962-1083
DOI - 10.1046/j.1365-294x.2000.01015.x
Subject(s) - biology , haplotype , brown trout , phylogeography , mitochondrial dna , trout , mtdna control region , mediterranean climate , mediterranean basin , ecology , biogeography , zoology , fishery , genotype , phylogenetics , genetics , gene , fish <actinopterygii>
The biogeographical distribution of brown trout mitochondrial DNA haplotypes throughout the Iberian Peninsula was established by polymerase chain reaction‐restriction fragment polymorphism analysis. The study of 507 specimens from 58 localities representing eight widely separated Atlantic‐slope (north and west Iberian coasts) and six Mediterranean drainage systems served to identify five main groups of mitochondrial haplotypes: (i) haplotypes corresponding to non‐native, hatchery‐reared brown trout that were widely distributed but also found in wild populations of northern Spain (Cantabrian slope); (ii) a widespread Atlantic haplotype group; (iii) a haplotype restricted to the Duero Basin; (iv) a haplotype shown by southern Iberian populations; and (v) a Mediterranean haplotype. The Iberian distribution of these haplotypes reflects both the current fishery management policy of introducing non‐native brown trout, and Messinian palaeobiogeography. Our findings complement and extend previous allozyme studies on Iberian brown trout and improve present knowledge of glacial refugia and postglacial movement of brown trout lineages.