A study on Pomatoschistus tortonesei Miller 1968 (Perciformes, Gobiidae) reveals the Siculo-Tunisian Strait (STS) as a breakpoint to gene flow in the Mediterranean basin.

Sabrina Lo Brutto, Marco Arculeo, Randa Mejri, Oum Kalthoum Ben Hassine

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Abstract

The current genetic structure of P. tortonesei, exclusively inhabiting lagoons, may reflect a Plio-Pleistocene colonisation of an ancestor line which has undergone phases of population decline and expansion, following alternate cooling phases. Regarding the calculation of divergence time, it has been estimated that P.tortonesei seems to be the most recent species within the Pomatoschistus genus. It appears also that the discrepancy of P. tortonesei into two distinct phyletic lineages occurred 0.1 Mya.Recurring shifts in sea level and sea surface temperatures of Mediterranean Sea caused the desiccation of shallower lagoonsand the consequent bottleneck phenomena of the brackish populations.Genetic differentiation in P. tortonesei seems to have been affected by its historical demography. Colonization and re-colonizationprocesses could have had strong effects on mitochondrial genealogy lineages.The SPN showed two haplogroups for each gene, each consistent with the two main clades, W-MED and E-MED, and resulting in a star-like shape network in agreement with the expansionmodel. These results correlated with those obtained through neutrality statistic tests, where significantly negative values forTajima’s D and Fu’s F statistics were most likely the result of recent population growth, since the mismatch distribution of both genesfitted the predicted distribution under a model of sudden population expansion.
Lingua originaleEnglish
pagine (da-a)596-601
Numero di pagine6
RivistaMolecular Phylogenetics and Evolution
Volume53
Stato di pubblicazionePublished - 2009

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Pomatoschistus
Perciformes
Gene Flow
Gobiidae
gene flow
strait
colonization
basins
Oceans and Seas
genealogy
population decline
statistics
demography
desiccation
basin
genetic differentiation
ancestry
Mediterranean Sea
genetic structure
Population

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics

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@article{36b1f789b9fe4c118e773b5fcb0d8b55,
title = "A study on Pomatoschistus tortonesei Miller 1968 (Perciformes, Gobiidae) reveals the Siculo-Tunisian Strait (STS) as a breakpoint to gene flow in the Mediterranean basin.",
abstract = "The current genetic structure of P. tortonesei, exclusively inhabiting lagoons, may reflect a Plio-Pleistocene colonisation of an ancestor line which has undergone phases of population decline and expansion, following alternate cooling phases. Regarding the calculation of divergence time, it has been estimated that P.tortonesei seems to be the most recent species within the Pomatoschistus genus. It appears also that the discrepancy of P. tortonesei into two distinct phyletic lineages occurred 0.1 Mya.Recurring shifts in sea level and sea surface temperatures of Mediterranean Sea caused the desiccation of shallower lagoonsand the consequent bottleneck phenomena of the brackish populations.Genetic differentiation in P. tortonesei seems to have been affected by its historical demography. Colonization and re-colonizationprocesses could have had strong effects on mitochondrial genealogy lineages.The SPN showed two haplogroups for each gene, each consistent with the two main clades, W-MED and E-MED, and resulting in a star-like shape network in agreement with the expansionmodel. These results correlated with those obtained through neutrality statistic tests, where significantly negative values forTajima’s D and Fu’s F statistics were most likely the result of recent population growth, since the mismatch distribution of both genesfitted the predicted distribution under a model of sudden population expansion.",
keywords = "Pomatoschistus tortonesei, Siculo-Tunisian Strait (STS), mtDNA",
author = "{Lo Brutto}, Sabrina and Marco Arculeo and Randa Mejri and Hassine, {Oum Kalthoum Ben}",
year = "2009",
language = "English",
volume = "53",
pages = "596--601",
journal = "Molecular Phylogenetics and Evolution",
issn = "1055-7903",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - A study on Pomatoschistus tortonesei Miller 1968 (Perciformes, Gobiidae) reveals the Siculo-Tunisian Strait (STS) as a breakpoint to gene flow in the Mediterranean basin.

AU - Lo Brutto, Sabrina

AU - Arculeo, Marco

AU - Mejri, Randa

AU - Hassine, Oum Kalthoum Ben

PY - 2009

Y1 - 2009

N2 - The current genetic structure of P. tortonesei, exclusively inhabiting lagoons, may reflect a Plio-Pleistocene colonisation of an ancestor line which has undergone phases of population decline and expansion, following alternate cooling phases. Regarding the calculation of divergence time, it has been estimated that P.tortonesei seems to be the most recent species within the Pomatoschistus genus. It appears also that the discrepancy of P. tortonesei into two distinct phyletic lineages occurred 0.1 Mya.Recurring shifts in sea level and sea surface temperatures of Mediterranean Sea caused the desiccation of shallower lagoonsand the consequent bottleneck phenomena of the brackish populations.Genetic differentiation in P. tortonesei seems to have been affected by its historical demography. Colonization and re-colonizationprocesses could have had strong effects on mitochondrial genealogy lineages.The SPN showed two haplogroups for each gene, each consistent with the two main clades, W-MED and E-MED, and resulting in a star-like shape network in agreement with the expansionmodel. These results correlated with those obtained through neutrality statistic tests, where significantly negative values forTajima’s D and Fu’s F statistics were most likely the result of recent population growth, since the mismatch distribution of both genesfitted the predicted distribution under a model of sudden population expansion.

AB - The current genetic structure of P. tortonesei, exclusively inhabiting lagoons, may reflect a Plio-Pleistocene colonisation of an ancestor line which has undergone phases of population decline and expansion, following alternate cooling phases. Regarding the calculation of divergence time, it has been estimated that P.tortonesei seems to be the most recent species within the Pomatoschistus genus. It appears also that the discrepancy of P. tortonesei into two distinct phyletic lineages occurred 0.1 Mya.Recurring shifts in sea level and sea surface temperatures of Mediterranean Sea caused the desiccation of shallower lagoonsand the consequent bottleneck phenomena of the brackish populations.Genetic differentiation in P. tortonesei seems to have been affected by its historical demography. Colonization and re-colonizationprocesses could have had strong effects on mitochondrial genealogy lineages.The SPN showed two haplogroups for each gene, each consistent with the two main clades, W-MED and E-MED, and resulting in a star-like shape network in agreement with the expansionmodel. These results correlated with those obtained through neutrality statistic tests, where significantly negative values forTajima’s D and Fu’s F statistics were most likely the result of recent population growth, since the mismatch distribution of both genesfitted the predicted distribution under a model of sudden population expansion.

KW - Pomatoschistus tortonesei

KW - Siculo-Tunisian Strait (STS)

KW - mtDNA

UR - http://hdl.handle.net/10447/51417

M3 - Article

VL - 53

SP - 596

EP - 601

JO - Molecular Phylogenetics and Evolution

JF - Molecular Phylogenetics and Evolution

SN - 1055-7903

ER -