Comparative phylogeography of reef fishes from the Gulf of Aden to the Arabian Sea reveals two cryptic lineages

Sinclair-Taylor, Tane H., Berumen, Michael L., Priest, Mark A., Choat, J. Howard, McIlwain, Jennifer H., Rocha, Luiz A., Bowen, Brian W., Piatek, Marek J., Saenz-Agudelo, Pablo, DiBattista, Joseph D., Gaither, Michelle R., and Hobbs, Jean-Paul A. (2017) Comparative phylogeography of reef fishes from the Gulf of Aden to the Arabian Sea reveals two cryptic lineages. Coral Reefs, 36 (2). pp. 625-638.

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The Arabian Sea is a heterogeneous region with high coral cover and warm stable conditions at the western end (Djibouti), in contrast to sparse coral cover, cooler temperatures, and upwelling at the eastern end (southern Oman). We tested for barriers to dispersal across this region (including the Gulf of Aden and Gulf of Oman), using mitochondrial DNA surveys of 11 reef fishes. Study species included seven taxa from six families with broad distributions across the Indo-Pacific and four species restricted to the Arabian Sea (and adjacent areas). Nine species showed no significant genetic partitions, indicating connectivity among contrasting environments spread across 2000 km. One butterflyfish (Chaetodon melannotus) and a snapper (Lutjanus kasmira) showed phylogenetic divergences of d = 0.008 and 0.048, respectively, possibly indicating cryptic species within these broadly distributed taxa. These genetic partitions at the western periphery of the Indo-Pacific reflect similar partitions recently discovered at the eastern periphery of the Indo-Pacific (the Hawaiian and the Marquesan Archipelagos), indicating that these disjunctive habitats at the ends of the range may serve as evolutionary incubators for coral reef organisms.

Item ID: 50720
Item Type: Article (Research - C1)
ISSN: 0722-4028
Keywords: coral-reef fishes, cryptic species, endemism, life-history, mtDNA, Red Sea
Funders: King Abdullah University of Science and Technology (KAUST) Office of Competitive Research Funds (OCRF), National Geographic Society (NGS), National Science Foundation (NSF), California Academy of Sciences
Projects and Grants: KAUST Award no. CRG-1-2012-BER-002, NGS Grant 9024-11, NGS Grant 9566-14, NSF Grant OCE-0929031, NSG Grant OCE-1558852
Date Deposited: 20 Sep 2017 11:20
FoR Codes: 31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310410 Phylogeny and comparative analysis @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960808 Marine Flora, Fauna and Biodiversity @ 100%
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