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- W2808964162 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 601:167-183 (2018) - DOI: https://doi.org/10.3354/meps12667 Limited latitudinal ranging of juvenile whale sharks in the Western Indian Ocean suggests the existence of regional management units Clare E. M. Prebble1,2,*, Christoph A. Rohner2, Simon J. Pierce2, David P. Robinson3, Mohammed Y. Jaidah4, Steffen S. Bach5, Clive N. Trueman1 1National Oceanography Centre, University of Southampton, SO14 3ZH, UK 2Marine Megafauna Foundation, Truckee, CA 96161, USA 3Sharkwatch Arabia, Dubai, UAE 4Qatar Ministry of Environment, PO Box 22332, Doha, Qatar 5North Oil Company, PO Box 21264, Doha, Qatar *Corresponding author: cemp1g14@soton.ac.uk ABSTRACT: Assessing the movements and connectivity of whale sharks Rhincodon typus through their range is difficult due to high individual mobility and limited knowledge of their behaviour following dispersal from coastal aggregation sites. Here, we use a large set of photo-identification and stable isotope data (δ15N and δ13C) to test the assumption that sharks frequenting aggregation sites in Mozambique, Tanzania, and Qatar are a mixed stock, as inferred by genetic data. Photo-identification revealed negligible connectivity among aggregation sites and none between the southern and central areas of the Western Indian Ocean (Mozambique and Tanzania) and the Arabian Gulf (Qatar). Sight-resight data indicated that shark movements at each site could be best represented by a model that included emigration, re-immigration, and some mortality or permanent emigration. Although there was high individual variation in the isotope profiles of sharks from each location, comparison with latitudinal isotope data suggests that sharks had shown site fidelity to within a few hundred kilometres of each study area over the period of isotopic integration. Given the Endangered status of whale sharks and regional differences in anthropogenic threat profiles, further studies—and conservation assessment efforts—should consider the possibility that whale shark subpopulations exist over smaller geographical scales than previously documented. KEY WORDS: Movement ecology · Planktivore · Philopatry · Elasmobranch · Mark-recapture Full text in pdf format PreviousNextCite this article as: Prebble CEM, Rohner CA, Pierce SJ, Robinson DP, Jaidah MY, Bach SS, Trueman CN (2018) Limited latitudinal ranging of juvenile whale sharks in the Western Indian Ocean suggests the existence of regional management units. Mar Ecol Prog Ser 601:167-183. https://doi.org/10.3354/meps12667 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 601. Online publication date: August 09, 2018 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2018 Inter-Research." @default.
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- W2808964162 date "2018-08-09" @default.
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- W2808964162 title "Limited latitudinal ranging of juvenile whale sharks in the Western Indian Ocean suggests the existence of regional management units" @default.
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