Distribution, seasonal movements and habitat utilisation of an endangered shark, Glyphis glyphis, from northern Australia

Lyon, B. J., Dwyer, R. G., Pillans, R. D., Campbell, H. A. and Franklin, C. E. (2017) Distribution, seasonal movements and habitat utilisation of an endangered shark, Glyphis glyphis, from northern Australia. Marine Ecology Progress Series, 573 203-213. doi:10.3354/meps12200


Author Lyon, B. J.
Dwyer, R. G.
Pillans, R. D.
Campbell, H. A.
Franklin, C. E.
Title Distribution, seasonal movements and habitat utilisation of an endangered shark, Glyphis glyphis, from northern Australia
Formatted title
Distribution, seasonal movements and habitat utilisation of an endangered shark, Glyphis glyphis, from northern Australia
Journal name Marine Ecology Progress Series   Check publisher's open access policy
ISSN 0171-8630
1616-1599
Publication date 2017-06-01
Sub-type Article (original research)
DOI 10.3354/meps12200
Open Access Status Not yet assessed
Volume 573
Start page 203
End page 213
Total pages 11
Place of publication Oldendorf, Germany
Publisher Inter-Research
Language eng
Formatted abstract
Euryhaline and freshwater elasmobranchs are considered amongst the most threatened groups of aquatic animals. The speartooth shark Glyphis glyphis has a distribution restricted to estuaries and rivers in northern Australia and Papua New Guinea. Due to this restricted range and threats from fisheries and habitat degradation, the species is currently listed as Endangered on the IUCN Red List. To inform and direct conservation management actions, we investigated the distribution and habitat utilisation of G. glyphis in the Wenlock River system, Queensland, Australia. Using acoustic transmitters and a network of fixed underwater acoustic hydrophones, the movements of 40 sharks (63 to 131.5 cm total length) were tracked over 22 mo, throughout 137 km of river and adjacent coastal embayment. Three broad zones were utilised by tagged G. glyphis, comprising a lower (0 to 23 km), mid (20 to 50 km) and upper (35 to 68 km upstream) estuary zone. Individual-based occupancy of these zones changed with seasonal changes in freshwater inflow. These results provide new insight into the habitat requirements of G. glyphis, the importance of natural eco-hydrological flows for the species, and the significance of the Wenlock River as a G. glyphis natal area.
Keyword Acoustic telemetry
Conservation
Elasmobranch
Euryhaline
Fisheries
Glyphis
River shark
Spatial ecology
Tropical tidal river
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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