Interspecific differentiation and intraspecific substructure in two closely related clupeids with extensive hybridization, Alosa alosa and Alosa fallax

• Type: Article in International Scientific Journal
• Date: 2006

Authors

alexandrino, p (Author) FCUP; faria, r (Author) Other; linhares, d (Author) Other; castro, f (Author) Other; le corre, m (Author) Other; sabatie, r (Author) Other; bagliniere, jl (Author) Other; weiss, s (Author) Other

Journal

Title: Journal of Fish Biology

Vol. 69

Pages: 242-259

ISSN: 0022-1112

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 50 Citations

Scopus - 52 Citations

Scientific classification

FOS: Agrarian Sciences > Agriculture, Forestry, and Fisheries

Other information

Authenticus ID: P-004-FTA

DOI: 10.1111/j.1095-8649.2006.01289.x

Abstract (EN): In this study, the evolutionary relationships within and among populations of European shads, Alosa alosa and Alosa fallax, was investigated. Screening of allelic variation across eight allozyme loci and sequencing 448 bp of the mtDNA cytochrome b gene in 14 rivers throughout the range of the species supported that the two taxa were independent lineages (1(.)3% net nucleotide divergence) despite extensive hybridization. Genetic diversity and structure was considerably higher in A. fallax than A. alosa and the former species revealed evidence of distinct lineages in the Mediterranean and Atlantic basins. A Bayesian clustering approach combined with gill raker counts verified that individuals of the two species could be assigned to their parent group with relatively high confidence. Evaluation of hybridization in the Lima and Mondego Rivers in Portugal provided evidence that introgression is extensive but is not currently obscuring (through hybrid swarming) the diagnosability of the two species. (c) 2006 The Authors Journal compilation (c) 2006 The Fisheries Society of the British Isles.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 18