Discord in the family Sparidae (Teleostei): divergent phylogeographical patterns across the Atlantic–Mediterranean divide
Open Access
- 1 November 2003
- journal article
- website
- Published by Oxford University Press (OUP) in Journal of Evolutionary Biology
- Vol. 16 (6), 1149-1158
- https://doi.org/10.1046/j.1420-9101.2003.00620.x
Abstract
The Strait of Gibraltar has been proposed to be the divide between two marine biogeographical regions, the Mediterranean Sea and the Northeast Atlantic. Intraspecific studies have shown, for several of the examined species, a reduction of gene flow between the two basins. The present study examines genetic variation at nuclear and mitochondrial loci in five marine teleost species belonging to the family Sparidae. Four samples for each species were analysed spanning the Northeast Atlantic and the Mediterranean. For all individuals 17 allozyme loci were scored and a combined single strand conformation polymorphism‐sequencing approach was used to survey approximately 190 bp of the mitochondrial DNA (mtDNA) D‐loop region. All five species share similar biological features. For three species, namely Lithognathus mormyrus, Spondyliosoma cantharus, and Dentex dentex, large mtDNA divergence was observed between Atlantic and Mediterranean samples. Little or no mtDNA differentiation was found in the other two species, Pagrus pagrus and Pagellus bogaraveo. Allozyme data revealed strong differentiation when comparing Atlantic and Mediterranean samples of L. mormyrus and D. dentex, moderate for P. pagrus, and no differentiation for P. bogaraveo and S. cantharus. These results provide evidence for a sharp phylogeographical break (sensu Avise) between the Atlantic and the Mediterranean for two (or possibly three) sparid species of the five investigated. At the same time, the obtained results for the other two species raise the question on which ecological/historical factors might have caused the observed discrepancy in the geographical distribution of genetic variation among otherwise biologically similar species.Keywords
This publication has 28 references indexed in Scilit:
- Phylogeography and population history of Atlantic mackerel (Scomber scombrusL.): a genealogical approach reveals genetic structuring among the eastern Atlantic stocksProceedings. Biological sciences, 2000
- Genetic study of the Atlantic/Mediterranean transition in sea bass (Dicentrarchus labrax)Journal of Heredity, 1999
- Genetic identification of sparid species by isozyme markers: application to interspecific hybridsAquaculture, 1999
- Conservation genetics in the marine realmJournal of Heredity, 1998
- Shallow population histories in deep evolutionary lineages of marine fishes: insights from sardines and anchovies and lessons for conservationJournal of Heredity, 1998
- The history and purview of phylogeography: a personal reflectionMolecular Ecology, 1998
- Spatial and temporal patterns of settlement among sparid fishes of the genus Diplodus in the northwestern MediterraneanMarine Ecology Progress Series, 1998
- Mitochondrial DNA control region sequences indicate extensive mixing of swordfish (Xiphias gladius) populations in the Atlantic OceanCanadian Journal of Fisheries and Aquatic Sciences, 1995
- CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choiceNucleic Acids Research, 1994
- Analyzing Tables of Statistical TestsEvolution, 1989