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Biological and environmental effects on activity space of a common reef shark on an inshore reef

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dc.contributor Ctr Sustainable Trop Fisheries & Aquaculture
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Australian Institute Of Marine Science
dc.contributor Coll Sci & Engn
dc.contributor Australian Inst Marine Sci HEUPEL, MICHELLE R. UDYAWER, VINAY SCHLAFF, AUDREY M. SIMPFENDORFER, COLIN A. 2017-06-16T04:48:24Z 2017-06-16T04:48:24Z 2019-10-21T21:45:58Z 2017-06-16T04:48:24Z 2017-06-16T04:48:24Z 2019-10-21T21:45:58Z 2017-05-17
dc.identifier.citation Schlaff AM, Heupel MR, Udyawer V, Simpfendorfer CA (2017) Biological and environmental effects on activity space of a common reef shark on an inshore reef. Marine Ecology Progress Series 571: 169-181
dc.identifier.issn 0171-8630
dc.description.abstract Proximity to land and sources of freshwater expose fishes residing on inshore reefs to fluctuating environmental conditions (e.g. high freshwater run-off/low salinity events). However, site attachment in many reef residents, such as reef sharks, could mean that relocation in response to unfavourable environmental conditions may not be feasible. Passive acoustic telemetry was used to monitor movement and space use of 18 blacktip reef sharks Carcharhinus melanopterus on an inshore reef off the coast of Queensland, Australia, to determine their response to environmental change. Activity space of sharks was modelled against combinations of environmental (wind speed, rain, salinity and water temperature) and biological (size, sex) factors. Size was the most influential predictor of space use, with larger sharks having larger activity spaces. Sex also appeared in top-performing models, showing that juvenile males use more space than juvenile females, although effects were marginal. Model results also indicated a relationship between shark activity space and salinity, where space use increased with decreasing salinity. A similar but weaker relationship was observed with water temperature. These results show that blacktip reef sharks respond to minor changes in salinity, suggesting that they may be able to relocate when conditions are unfavourable, and help define the resilience of this species to disturbance and change.
dc.description.sponsorship We thank staff and students of the Fishing and Fisheries Research Group at James Cook University (JCU) who helped with field efforts, including F. de Faria, S. Moore, D. Waltrick, L. Currey, D. Knip, J. Matley and L. Davy. We also thank E. Ledee for analytical support. Funding for this research was provided by the Australian Government's National Environmental Research Program (Tropical Ecosystems Hub) awarded to M.R.H. and C.A.S. All research activities were conducted under research permits from the Great Barrier Reef Marine Park Authority (G10/33754.1 and G10/33240.1) and with approval from JCU's Animal Ethics Committee (permit A1566). Data were sourced from the Integrated Marine Observing System (IMOS), a national collaborative research infrastructure supported by the Australian Government. We thank A. Boomer and P. McDowell from the IMOS Animal Tracking Facility for assistance with receiver deployments.
dc.language English
dc.subject Marine & Freshwater Biology
dc.subject Carcharhinus-melanopterus
dc.subject Negaprion-brevirostris
dc.subject Climate Change
dc.subject Ecology
dc.subject Habitat Use
dc.subject Imos Animal Tracking Facility
dc.subject Lemon Sharks
dc.subject Oceanography
dc.subject Coral Reef
dc.subject Carcharhinus Melanopterus
dc.subject Trophic Ecology
dc.subject Climate-change
dc.subject Term Movement Patterns
dc.subject Acoustic Monitoring
dc.subject Environmental Sciences & Ecology
dc.subject Residency Patterns
dc.subject Salinity
dc.subject Spatial Ecology
dc.subject Acoustic Receivers
dc.subject Blacktip Reef Shark
dc.subject Great-barrier-reef
dc.title Biological and environmental effects on activity space of a common reef shark on an inshore reef
dc.type journal article
dc.identifier.doi 10.3354/meps12107
dc.identifier.wos WOS:000401800100013

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