Data

Size, sex and geographic variation in the diet of the tiger shark, Galeocerdo cuvier, from Western Australian waters

Australian Ocean Data Network
Luke Edwards (Distributes) Nowrojee, Rod (Point of contact) Office of Environmental Protection Authority (OEPA), Western Australian Government (Associated with) iVEC (Associated with)
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://catalogue.aodn.org.au:443/geonetwork/srv/api/records/516811d7-cd84-207a-e0440003ba8c79dd&rft.title=Size, sex and geographic variation in the diet of the tiger shark, Galeocerdo cuvier, from Western Australian waters&rft.identifier=516811d7-cd84-207a-e0440003ba8c79dd&rft.publisher=Australian Ocean Data Network&rft.description=Stomach contents from tiger sharks, Galeocerdo cuvier, caught on lines off the central coast of Western Australia were analysed to investigate variations in the diet due to sex, size and geographic location. Stomachs from 84 specimens contained food, while 26 had empty stomachs and 66 had regurgitated. Twelve prey groups were identified, the most common being turtles, sea snakes, teleost fishes, dugongs and sea birds. Dietary overlap was high between males and females. An ontogenetic shift was observed in the diet. Smaller prey (e.g. cephalopods, teleosts and sea snakes) were more common in small individuals, while the occurrence of larger prey (e.g. turtles, dugongs and elasmobranchs) increased with increasing shark size. Differences in the diet were observed between four regions along the central Western Australian coast. The ability to catch and consume large prey, prey availability, prey density, and prey profitability were identified as factors influencing the diet. The high level of occurrence of dugongs and turtles in the diet of G. cuvier, relative to their abundance, suggests that shark predation may play an important role in regulating populations of these species. [References: 24]Maintenance and Update Frequency: unknownStatement: Original record compiled for the Western Australian Marine Science Institution (WAMSI), Project 3.8, 2008. Originally sourced from WA DEC Marine Policy and Planning Branch Pilbara and Lower West Kimberley Environmental Report Library. Date range generated from citation date, limited abstract information available.&rft.creator=Anonymous&rft.date=2017&rft.coverage=westlimit=114.12; southlimit=-21.85; eastlimit=115.6; northlimit=-20.34&rft.coverage=westlimit=114.12; southlimit=-21.85; eastlimit=115.6; northlimit=-20.34&rft_rights=No Restrictions&rft_subject=environment&rft_subject=Tiger Sharks&rft_subject=Turtle&rft_subject=Dolphin&rft_subject=Dugong&rft_subject=Marine Features (Australia) | Shark Bay, WA&rft_subject=Marine Features (Australia) | Pilbara Coast, WA&rft_subject=Marine Features (Australia) | Abrolhos Islands, WA&rft_subject=Marine Features (Australia) | Ningaloo Marine Park, WA&rft_subject=Stomach Contents&rft_subject=Diet&rft.type=dataset&rft.language=English Access the data
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Stomach contents from tiger sharks, Galeocerdo cuvier, caught on lines off the central coast of Western Australia were analysed to investigate variations in the diet due to sex, size and geographic location. Stomachs from 84 specimens contained food, while 26 had empty stomachs and 66 had regurgitated. Twelve prey groups were identified, the most common being turtles, sea snakes, teleost fishes, dugongs and sea birds. Dietary overlap was high between males and females. An ontogenetic shift was observed in the diet. Smaller prey (e.g. cephalopods, teleosts and sea snakes) were more common in small individuals, while the occurrence of larger prey (e.g. turtles, dugongs and elasmobranchs) increased with increasing shark size. Differences in the diet were observed between four regions along the central Western Australian coast. The ability to catch and consume large prey, prey availability, prey density, and prey profitability were identified as factors influencing the diet. The high level of occurrence of dugongs and turtles in the diet of G. cuvier, relative to their abundance, suggests that shark predation may play an important role in regulating populations of these species. [References: 24]

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Maintenance and Update Frequency: unknown
Statement: Original record compiled for the Western Australian Marine Science Institution (WAMSI), Project 3.8, 2008. Originally sourced from WA DEC Marine Policy and Planning Branch Pilbara and Lower West Kimberley Environmental Report Library. Date range generated from citation date, limited abstract information available.

Notes

Credit
C.A. Simpfendorfer
Credit
A.B. Goodreid
Credit
R.B. McAuley

Modified: 06 2008

Data time period: 2001 to 2001

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115.6,-20.34 115.6,-21.85 114.12,-21.85 114.12,-20.34 115.6,-20.34

114.86,-21.095

text: westlimit=114.12; southlimit=-21.85; eastlimit=115.6; northlimit=-20.34

Subjects
Diet | Dolphin | Dugong | Marine Features (Australia) | Abrolhos Islands, WA | Marine Features (Australia) | Ningaloo Marine Park, WA | Marine Features (Australia) | Pilbara Coast, WA | Marine Features (Australia) | Shark Bay, WA | Stomach Contents | Tiger Sharks | Turtle | environment |

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  • global : 516811d7-cd84-207a-e0440003ba8c79dd