@article{fdi:010078168,
  title = {{G}enetic diversity and connectivity of {F}laccisagitta enflata ({C}haetognatha : {S}agittidae) in the tropical {A}tlantic ocean ({N}ortheastern {B}razil)},
  author = {{M}elo, {D}. {C}. {M}. and {L}ira, {S}. {M}. {A}. and {M}oreira, {A}. {P}. {B}. and {F}reitas, {L}. and {L}ima, {C}. {A}. {D}. and {T}hompson, {F}. and {B}ertrand, {A}rnaud and {S}ilva, {A}. {C}. and {N}eumann-{L}eitao, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he phylogeography of the holoplanktonic chaetognath {F}laccisagitta enflata was investigated in the {T}ropical {W}estern {A}tlantic ({TWA}). {C}onsidering the cosmopolitan range of this species and the fact that its entire life cycle is planktonic, the central hypothesis of this study is that {F}. enflata exhibits connectivity due to its high dispersal capacity, forming a panmictic population among the study sites. {T}he evaluated areas included neritic ({P}ort of {R}ecife-{PR}, and {T}amandare - {TA}) and oceanic ({F}ernando de {N}oronha {A}rchipelago-{FN}, {R}ocas {A}toll-{RA}, {G}uara seamount-{GS} and {S}aint {P}eter and {S}aint {P}aul's {A}rchipelago-{SPSPA}) locations of the {B}razilian {B}lue {A}mazon. {W}e used {COI} gene sequences as molecular marker. {P}artial sequences (425 bp) were obtained for 116 specimens and employed to reconstruct the phylogeny, build an haplotype network, evaluate gene flow through a migration model, and estimate diversity indices, population structuring and demographic history. {H}igh levels of haplotype diversity (mean: 0.98) and moderate to high levels of nucleotide diversity (mean: 0.023) were observed. {T}he phylogeny and the haplotype network topologies showed some geographic clustering, indicating local structuring in {GS} and {PR}. {T}his finding was supported by the {AMOVA} high global phi st (0.033, significant) and some pairwise phi st comparisons (7 out of 15 were significantly > 0). {S}ignificant differences suggested lower levels of connectivity when {GS} population was compared to those of {FN} and {SPSPA}; as well as when {TA} was compared to {FN}. {T}hese results might be related to particularities of the oceanic dynamics which rules the {TWA}, sustaining such dissimilarities. {S}tructuring was also observed between {PR} and all oceanic locations. {W}e hypothesize that the topography of the port inlet, enclosured by a reef barrier, may constrain the water turnover ratio and thus migration rates of {F}. enflata in the {TWA}. {A}ccordingly, {M}igrate-{N} yielded a four metapopulations model ({PR} (sic) {TA} (sic) {SPSPA}+{FN} (sic) {GS}+{RA}) as the best (highest probability; similar to 0.90) to represent the structuring of {F}. enflata in the {TWA}. {T}herefore, the null hypothesis of one randomly mating population cannot be accepted. {T}he demographic evaluation demonstrated that the neutral hypothesis of stable populations may not be rejected for most of the locations. {T}his work is the start point to broaden the knowledge on the phylogeography and population genetic structure of a numerically dominant species in the {W}estern {A}tlantic, with key role in the marine trophic web.},
  keywords = {{BRESIL} ; {NORDESTE} ; {ATLANTIQUE} ; {ZONE} {TROPICALE}},
  booktitle = {},
  journal = {{PL}o{S} {O}ne},
  volume = {15},
  numero = {5},
  pages = {e0231574 [21 p.]},
  ISSN = {1932-6203},
  year = {2020},
  DOI = {10.1371/journal.pone.0231574},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078168},
}