Skip to Main content Skip to Navigation
Journal articles

Zoogéographie infra-spécifique de la Mer Méditerranée : analyse des données génétiques populationnelles sur seize espèces atlanto-méditerranéennes (poissons et invertébrés) : Analyse des données génétiques populationnelles sur seize espèces atlanto-méditerranéennes (poissons et invertébrés)

Abstract : The faunal relationships of the Atlantic and the Mediterranean have been affected by tectonic change in the Miocene, by climate change in the Pleistocene and by hydrological discontinuity. We use a population genetics approach to the biogeography of the Mediterranean marine fauna, in particular to describe the level of recent or present-day exchanges with the Atlantic. The level of genetic differences between populations was estimated from published and unpublished data on sixteen species from the northeastern Atlantic and the Mediterranean. For a majority of species, either tropical or subtropical or boreal fishes, or coastal invertebrates, a moderately-strong to strong genetic cline across the Gibraltar strait area was observed. Such a pattern was also observed in a proportion of species across the siculo-tunisian strait. In a limited number of cases, the geographic patterns of population genetic structure however conformed with the expectations from an isolation-by-distance model. The molecular phylogeographic approach in a boreal species, the flounder Platichthys flesus, led to the inference of the historical movements of colonisation and geographic isolation of the populations. A similar approach in a tropical species (the Spanish sardine Sardinella aurita) and a cosmopolitan species (the grey mullet Mugil cephalus) revealed close genetic relationships between Mediterranean and tropical eastern-Atlantic populations. We analyse the possible implications of these findings to the systematics of the Mediterranean populations and we speculate about the future of boreal species vis-à-vis the present climate change. We debate on various hypotheses for the maintaining of abrupt genetic clines in the marine environment.
Complete list of metadatas

Cited literature [83 references]  Display  Hide  Download

https://hal.ird.fr/ird-02994679
Contributor : Philippe Borsa <>
Submitted on : Sunday, November 8, 2020 - 11:36:45 AM
Last modification on : Wednesday, November 11, 2020 - 3:29:03 AM

File

Borsa et al_VieMilieu 1997_vHA...
Files produced by the author(s)

Identifiers

Collections

IRD

Citation

Philippe Borsa, Mariam Naciri, Lilia Bahri, Lounes Chikhi, Francisco García de León, et al.. Zoogéographie infra-spécifique de la Mer Méditerranée : analyse des données génétiques populationnelles sur seize espèces atlanto-méditerranéennes (poissons et invertébrés) : Analyse des données génétiques populationnelles sur seize espèces atlanto-méditerranéennes (poissons et invertébrés). Vie et Milieu / Life & Environment, Observatoire Océanologique - Laboratoire Arago, 1997. ⟨ird-02994679⟩

Share

Metrics

Record views

14

Files downloads

9