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Population organisation in reef sharks: new variations in coastal habitat use by mobile marine predators

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dc.contributor Australian Institute Of Marine Science
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Townsville Mail Ctr
dc.contributor Coll Marine & Environm Sci
dc.contributor Australian Inst Marine Sci
dc.contributor Ctr Sustainable Trop Fisheries & Aquaculture TOBIN, ANDREW J. CHIN, ANDREW HEUPEL, MICHELLE R. SIMPFENDORFER, COLIN A. 2016-04-29T06:17:51Z 2016-04-29T06:17:51Z 2017-03-21T01:02:57Z 2019-07-08T02:22:33Z 2017-03-21T01:02:57Z 2016-04-29T06:17:51Z 2017-03-21T01:02:57Z 2019-07-08T02:22:33Z 2016-02-18
dc.identifier.citation Chin A, Heupel MR, Simpfendorfer CA, Tobin AJ (2016) Population organisation in reef sharks: new variations in coastal habitat use by mobile marine predators. Marine Ecology Progress Series 544: 197-211 en_US
dc.identifier.issn 0171-8630
dc.description.abstract Coastal habitats provide important functions for many species and may serve as nursery grounds for teleost fishes and sharks and rays. However, the importance of these habitats in sustaining marine species at seascape scales is debated, and their significance to reef shark populations is poorly understood. The blacktip reef shark Carcharhinus melanopterus is a widely distributed mobile marine predator; we explored its use of shallow, turbid coastal habitats in the Great Barrier Reef using tagging and acoustic telemetry. Residency and movement patterns of 23 individuals were monitored for up to 28 mo, revealing different patterns between sexes and sizes. Neonate/juveniles were short-term residents; adult females were long-term residents and preliminary data suggest that adult males were vagrants. Adult females and neonate/juveniles had small activity spaces (50% kernel utilisation distribution, KUD < 5 km(2)) and shared the same habitats and locations while adult males (when present) had larger activity spaces (50% KUD up to 14 km(2)). Population organisation, movement patterns and biological data suggest that blacktip reef sharks may use turbid coastal habitats for reproduction. This study reveals a new variation in coastal habitat use by sharks with habitat use patterns differing from those observed in other coastal sharks, and from conspecifics on coral reefs. These patterns do not conform to the characteristics of classical shark nurseries, and highlight the species' ecological flexibility. The study also demonstrates that shark behaviour and habitat use patterns can affect their vulnerability to fishing, habitat loss and climate change, and can affect the efficacy of marine protected areas.
dc.description.sponsorship The authors thank funding agencies and collaborators, principally the Australian Government through the Marine and Tropical Sciences Research Facility Project 4.8.4 and also James Cook University and the Great Barrier Reef Marine Park Authority. Spatial data were provided under licence by the GBRMPA Spatial Data Centre. The Cleveland Bay receiver array was established with funding from the Australian Research Council. Special thanks to D. Knip, J. White, A. Schlaff, F. DeFaria and all others involved in establishing and maintaining the Cleveland Bay receiver array, and to the dedicated volunteers who provided invaluable assistance in the field: C. Bryant, S. Whatmough, S. Gibbs, J. White, L. Currey and M. Trapon. We gratefully acknowledge the valuable contributions of V. Udyawer and D. Knip in developing R scripts for ana lysing telemetry data. This research was carried out under JCU Ethics Approval A1566; GBRMPA Permit #G08/23753.1; and QDPI&F Permit #90091. We also thank the anonymous reviewers for providing valuable advice which was extremely useful in improving the manuscript.
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher Inter-Research en_US
dc.relation.ispartof Null
dc.subject Great-barrier-reef
dc.subject Carcharhinus-melanopterus
dc.subject Marine Protected Area
dc.subject Ecology
dc.subject Fisheries
dc.subject Community Structure
dc.subject Juvenile Sandbar Sharks
dc.subject Coral-reefs
dc.subject Environmental Sciences & Ecology
dc.subject Nursery Habitat
dc.subject Fish Community
dc.subject Coastal Habitats
dc.subject Marine & Freshwater Biology
dc.subject Marine Predator
dc.subject Shark
dc.subject Movement Patterns
dc.subject Oceanography
dc.subject Species Composition
dc.subject Fish Behaviour
dc.subject Palmyra Atoll
dc.subject Nursery
dc.subject Summer Nursery
dc.title Population organisation in reef sharks: new variations in coastal habitat use by mobile marine predators
dc.type journal article en_US
dc.identifier.doi 10.3354/meps11545
dc.identifier.wos WOS:000371142500014

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