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Evidence for dynamic resource partitioning between two sympatric reef shark species within the British Indian Ocean Territory

Curnick, D; Carlisle, A; Gollock, M; Schallert, R; Hussey, N; (2019) Evidence for dynamic resource partitioning between two sympatric reef shark species within the British Indian Ocean Territory. Journal of Fish Biology , 94 (4) pp. 680-685. 10.1111/jfb.13938. Green open access

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Abstract

Stable isotope analyses (δ13C, δ15N and δ34S) of multiple tissues (fin, muscle, red blood cells and plasma), revealed ontogenetic shifts in resource use by grey reef sharks Carcharhinus amblyrhynchos and resource partitioning with silvertip sharks Carcharhinus albimarginatus within the British Indian Ocean Territory marine protected area (MPA). Resource partitioning varied temporally, with C. albimarginatus feeding on more pelagic prey during October to January, potentially attributable to an influx of pelagic prey from outside the MPA at that time. Reef sharks may therefore be impacted by processes outside MPAs, even if the sharks do not leave themselves.

Type: Article
Title: Evidence for dynamic resource partitioning between two sympatric reef shark species within the British Indian Ocean Territory
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/jfb.13938
Publisher version: hhttps://doi.org/10.1111/jfb.13938
Language: English
Additional information: Copyright © 2019 The Authors. Journal of Fish Biology published by John Wiley & Sons Ltd on behalf of The Fisheries Society of the British Isles. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Keywords: Resource partitioning, Reef shark, Stable isotope analysis, Sulphur, British Indian Ocean Territory
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: https://discovery.ucl.ac.uk/id/eprint/10068335
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