@article{fdi:010054231,
  title = {{P}atterns of genetic isolation in a widely distributed pelagic fish, the narrow-barred {S}panish mackerel ({S}comberomorus commerson)},
  author = {{F}auvelot, {C}{\'e}cile and {B}orsa, {P}hilippe},
  editor = {},
  language = {{ENG}},
  abstract = {{A}lthough migratory pelagic fishes generally exhibit little geographic differentiation across oceans, as expected from their life history (broadcast spawning, pelagic larval life, swimming ability of adults) and the assumed homogeneity of the pelagic habitat, exceptions to the rule deserve scrutiny. {O}ne such exception is the narrow-barred {S}panish mackerel ({S}comberomorus commerson {L}acepede, 1800), where strong genetic heterogeneity at the regional scale has been previously reported. {W}e investigated the genetic composition of {S}. commerson across the {I}ndo-{W}est {P}acific range using control-region sequences (including previously published data sets), cytochrome b gene partial sequences, and eight microsatellite loci, to further explore its phylogeographic structure. {A}ll haplotypes sampled from the {I}ndo-{M}alay-{P}apua archipelago ({IMPA}) and the south-western {P}acific coalesced into a clade (clade {II}) that was deeply separated (14.5% nucleotide divergence) from a clade grouping all haplotypes from the {P}ersian {G}ulf and {O}man {S}ea (clade {I}). {S}uch a high level of genetic divergence suggested the occurrence of two sister species. {F}urther phylogeographic partition was evident between the western {IMPA} and the regions sampled east and south of it, i.e. northern {A}ustralia, {W}est {P}apua, and the {C}oral {S}ea. {S}trong allele-frequency differences were found between local populations in the south-western {P}acific, both at the mitochondrial locus ({P}hi({ST}) = 0.282-0.609) and at microsatellite loci ((theta) over bar = 0.202-0.313). {C}lade {II} consisted of four deeply divergent subclades (9.0-11.8% nucleotide divergence for the control region; 0.3-2.5% divergence at the cytochrome b locus). {M}itochondrial subclades within clade {II} generally had narrow geographic distribution, demonstrating further genetic isolation. {H}owever, one particular haplogroup within clade {II} was present throughout the central {I}ndo-{W}est {P}acific: this haplogroup was found to be the sister group to a haplogroup restricted to {W}est {P}apua and the {C}oral {S}ea, yielding evidence of recent secondary westward colonization. {S}uch a complex structure is in sharp contrast with the generally weak phylogeographic patterns uncovered to date in other widely distributed, large pelagic fishes with pelagic eggs and larvae. {W}e hypothesize that in {S}. commerson and possibly other {S}comberomorus species, philopatric migration may play a role in maintaining the geographic isolation of populations by annihilating the potential consequences of passive dispersal.},
  keywords = {{I}ndo-{W}est {P}acific ; microsatellites ; mitochondrial lineages ; philopatry ; phylogeography ; {PACIFIQUE}},
  booktitle = {},
  journal = {{B}iological {J}ournal of the {L}innean {S}ociety},
  volume = {104},
  numero = {4},
  pages = {886--902},
  ISSN = {0024-4066},
  year = {2011},
  DOI = {10.1111/j.1095-8312.2011.01754.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010054231},
}