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Insights into insular isolation of the Bull Shark Carcharhinus leucas (Müller and Henle, 1839), in Fijian waters

Glaus, Kerstin B. J. and Appleyard, Sharon A. and Stockwell, Brian and Brunnschweiler, Juerg M. and Shivji, Mahmood and Clua, Eric and Marie, Amandine D. and Rico, Ciro (2020) Insights into insular isolation of the Bull Shark Carcharhinus leucas (Müller and Henle, 1839), in Fijian waters. Frontiers in Marine Science, 7 . p. 1087. ISSN 2296-7745

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Abstract

The bull shark (Carcharhinus leucas) is a large, mobile, circumglobally distributed high trophic level predator that inhabits a variety of remote islands and continental coastal habitats, including freshwater environments. Here, we hypothesize that the barriers to dispersal created by large oceanic expanses and deep-water trenches result in a heterogeneous distribution of the neutral genetic diversity between island bull shark populations compared to populations sampled in continental locations connected through continuous coastlines of continental shelves. We analyzed 1,494 high-quality neutral single nucleotide polymorphism (SNP) markers in 215 individual bull sharks from widespread locations across the Indian and Pacific Oceans (South Africa, Indonesia, Western Australia, Papua New Guinea, eastern Australia, New Caledonia, and Fiji). Genomic analyses revealed partitioning between remote insular and continental populations, with the Fiji population being genetically different from all other locations sampled (F<sub>ST</sub> = 0.034�0.044, P < 0.001), and New Caledonia showing marginal isolation (F<sub>ST</sub> = 0.016

Item Type: Journal Article
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > Q Science (General)
Q Science > QH Natural history > QH301 Biology
Divisions: School of Agriculture, Geography, Environment, Ocean and Natural Sciences (SAGEONS)
Depositing User: Fulori Nainoca - Waqairagata
Date Deposited: 24 Dec 2020 15:27
Last Modified: 24 Dec 2020 15:30
URI: http://repository.usp.ac.fj/id/eprint/12512
UNSPECIFIED

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