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Reef sharks and inshore habitats: patterns of occurrence and implications for vulnerability

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dc.contributor Australian Institute Of Marine Science
dc.contributor Sch Earth & Environm Sci
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Fishing & Fisheries Res Ctr
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science (aims) en HEUPEL, MICHELLE CHIN, ANDREW TOBIN, ANDREW SIMPFENDORFER, COLIN 2013-02-28T06:49:48Z 2013-02-28T06:49:48Z 2017-03-21T01:18:42Z 2019-07-08T02:14:27Z 2013-02-28T06:49:48Z 2013-02-28T06:49:48Z 2017-03-21T01:18:42Z 2019-07-08T02:14:27Z 2012-01-01
dc.identifier 9218 en
dc.identifier.citation Chin A, Tobin AJ, Simpfendorfer CA and Heupel M (2012) Reef sharks and inshore habitats: patterns of occurrence and implications for vulnerability. Marine Ecology Progress Series. 460: 115-125. en
dc.identifier.issn 0171-8630
dc.description Link to abstract/full text - en
dc.description.abstract Reef sharks play important roles in tropical reef environments, but population declines have occurred in various locations including the Great Barrier Reef (GBR). While many reef shark studies focus on coral reefs, some reef sharks have been found across a range of inshore and coastal habitats. This study analyses fisheries observer data across large spatial scales (19 314 km(2)) to investigate the occurrence of reef sharks amongst a mosaic of inshore habitats in the GBR lagoon. Six reef shark species were recorded, but comprised a relatively small proportion (1.8% by number) of the elasmobranch catch. The blacktip reef shark dominated the catch of reef sharks (60.2% by number), with lemon sharks, zebra sharks, grey carpet sharks, whitetip reef sharks and grey reef sharks less frequently encountered. Reef sharks occur in several habitat types, and logistic regression models suggest that they are most likely to occur in reef habitats and shallow shore habitats. The presence of a reef within 2 km increased the encounter probability in all habitat types. While the use of these different habitats by reef sharks is not well understood, these habitat use patterns affect the exposure of these species to risks, including some risk factors not considered previously, and could also lead to cumulative impacts. These habitats may also perform important ecological functions in sustaining reef shark populations. Habitat use patterns should be considered in risk assessments and management and have important implications for method selection and survey design in field studies of reef sharks and other mobile reef species.
dc.description.sponsorship Many thanks to the FFRC fisheries observers (O. Bittar, J. White and A. Mapleston) for collecting observer data, and to the Queensland Government fisheries observers (DEEDI) and researchers for making their data available. We gratefully acknowledge Ms. S. Gibbs (JCU) for providing invaluable assistance in collating, coding and integrating habitat data for the spatial analyses. We also thank the GBRMPA Spatial Data Centre and DEEDI for data and the map used in Fig. 1. The authors also acknowledge and thank all the commercial fishers who voluntarily participated in the observer program, making the collection of these data possible. This project was funded by the Australian Government through the Marine and Tropical Sciences Research Facility Project 4.8.4. Material from Stanford University (Christopher Manning 2007) and the UCLA Academic Technology Services, Statistical Consulting Group was very helpful in performing the logistic regression models in R. Research was carried out under JCU Ethics Approval A1566; GBRMPA Permit #G08/23753.1; and QDPI&F Permit #90091.
dc.description.uri en
dc.language English
dc.language en en
dc.relation.ispartof Marine Ecology Progress Series - pages: 460: 115-125 en
dc.relation.ispartof Null
dc.subject Great Barrier Reef
dc.subject Carcharhinus-melanopterus
dc.subject Ecology
dc.subject Habitat Use
dc.subject Cumulative Impact
dc.subject Coral-reefs
dc.subject Lemon Sharks
dc.subject Climate-change
dc.subject Environmental Sciences & Ecology
dc.subject Risk
dc.subject Movement Patterns
dc.subject Oceanography
dc.subject Vulnerability
dc.subject Great-barrier-reef
dc.subject Marine & Freshwater Biology
dc.subject Palmyra Atoll
dc.subject Ocean Acidification
dc.subject Coastal Habitat
dc.subject Rays
dc.subject Reef Shark
dc.title Reef sharks and inshore habitats: patterns of occurrence and implications for vulnerability
dc.type journal article en
dc.identifier.doi 10.3354/meps09722
dc.identifier.wos WOS:000306689800009

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