@article{fdi:010077747,
  title = {{S}peciation history of {E}uropean ({A}nguilla anguilla) and {A}merican eel ({A}. rostrata), analysed using genomic data},
  author = {{N}ikolic, {N}atacha and {L}iu, {S}. {L}. and {J}acobsen, {M}. {W}. and {J}onsson, {B}. and {B}ernatchez, {L}. and {G}agnaire, {P}. {A}. and {H}ansen, {M}. {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}peciation in the ocean could differ from terrestrial environments due to fewer barriers to gene flow. {H}ence, sympatric speciation might be common, with {A}merican and {E}uropean eel being candidates for exemplifying this. {T}hey show disjunct continental distributions on both sides of the {A}tlantic, but spawn in overlapping regions of the {S}argasso {S}ea from where juveniles are advected to {N}orth {A}merican, {E}uropean and {N}orth {A}frican coasts. {H}ybridization and introgression are known to occur, with hybrids almost exclusively observed in {I}celand. {D}ifferent speciation scenarios have been suggested, involving either vicariance or sympatric ecological speciation. {U}sing {RAD} sequencing and whole-genome sequencing data from parental species and {F}1 hybrids, we analysed speciation history based on the joint allele frequency spectrum ({JAFS}) and pairwise sequentially {M}arkovian coalescent ({PSMC}) plots. {JAFS} supported a model involving a split without gene flow 150,000-160,000 generations ago, followed by secondary contact 87,000-92,000 generations ago, with 64% of the genome experiencing restricted gene flow. {T}his supports vicariance rather than sympatric speciation, likely associated with {P}leistocene glaciation cycles and ocean current changes. {W}hole-genome {PSMC} analysis of {F}1 hybrids from {I}celand suggested divergence 200,000 generations ago and indicated subsequent gene flow rather than strict isolation. {F}inally, simulations showed that results from both approaches ({JAFS} and {PSMC}) were congruent. {H}ence, there is strong evidence against sympatric speciation in {N}orth {A}tlantic eels. {T}hese results reiterate the need for careful consideration of cases of possible sympatric speciation, as even in seemingly barrier-free oceanic environments palaeoceanographic factors may have promoted vicariance and allopatric speciation.},
  keywords = {allele frequency spectrum ; {A}nguilla spp ; {PSMC} ; secondary contact ; sympatric speciation ; vicariance ; {ATLANTIQUE} ; {EUROPE} ; {AMERIQUE} {DU} {NORD}},
  booktitle = {},
  journal = {{M}olecular {E}cology},
  volume = {[{E}arly {A}ccess]},
  numero = {},
  pages = {[13 p.]},
  ISSN = {0962-1083},
  year = {2019},
  DOI = {10.1111/mec.15342},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077747},
}