@article{fdi:010084569, title = {{G}enomic insights into the historical and contemporary demographics of the grey reef shark}, author = {{W}alsh, {C}. {A}. {J}. and {M}omigliano, {P}. and {B}oussarie, {G}. and {R}obbins, {W}. {D}. and {B}onnin, {L}. and {F}auvelot, {C}{\'e}cile and {K}iszka, {J}. {J}. and {M}ouillot, {D}. and {V}igliola, {L}aurent and {M}anel, {S}.}, editor = {}, language = {{ENG}}, abstract = {{A}nalyses of genetic diversity can shed light on both the origins of biodiversity hotspots, as well as the conservation status of species that are impacted by human activities. {W}ith these objectives, we assembled a genomic dataset of 14,935 single nucleotide polymorphisms from 513 grey reef sharks ({C}archarhinus amblyrhynchos) sampled across 17 locations in the tropical {I}ndo-{P}acific. {W}e analysed geographic variation in genetic diversity, estimated ancient and contemporary effective population size ({N}-e) across sampling locations (using coalescent and linkage disequilibrium methods) and modelled the history of gene flow between the {C}oral {T}riangle and the {C}oral {S}ea. {G}enetic diversity decreased with distance away from the {C}oral {T}riangle and north-western {A}ustralia, implying that {C}. amblyrhynchos may have originated in this region. {I}ncreases in {N}-e were detected across almost all sampling locations 40,000-90,000 generations ago (approximately 0.6-1.5 mya, given an estimated generation time of 16.4 years), suggesting a range expansion around this time. {M}ore recent, secondary increases in {N}-e were inferred for the {M}isool and {N}orth {G}reat {B}arrier {R}eef sampling locations, but joint modelling did not clarify whether these were due to population growth, migration, or both. {D}espite the greater genetic diversity and ancient {N}-e observed at sites around {A}ustralia and the {C}oral {T}riangle, remote reefs around north-western {N}ew {C}aledonia had the highest contemporary {N}-e, demonstrating the importance of using multiple population size assessment methods. {T}his study provides insight into both the past and present demographics of {C}. amblyrhynchos and contributes to our understanding of evolution in marine biodiversity hotspots.}, keywords = {{PACIFIQUE} ; {OCEAN} {INDIEN} ; {INDONESIE} ; {NOUVELLE} {GUINEE} ; {AUSTRALIE} ; {MER} {DE} {CORAIL} ; {NOUVELLE} {CALEDONIE}}, booktitle = {}, journal = {{H}eredity}, volume = {128}, numero = {}, pages = {225--235}, ISSN = {0018-067{X}}, year = {2022}, DOI = {10.1038/s41437-022-00514-4}, URL = {https://www.documentation.ird.fr/hor/fdi:010084569}, }