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• W2124167418 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 416:189-200 (2010) - DOI: https://doi.org/10.3354/meps08778 Predator–prey relationships and foraging ecology of a marine apex predator with a wide temperate distribution Adam Barnett1,2,*, Kátya Abrantes1,3, John D. Stevens2, Jonah L. Yick1, Stewart D. Frusher1, Jayson M. Semmens1 1Tasmanian Aquaculture and Fisheries Institute, Marine Research Laboratories, University of Tasmania, Private Bag 49, Hobart, Tasmania 7001, Australia 2CSIRO Marine and Atmospheric Research, GPO Box 1538, Hobart, Tasmania 7001, Australia 3Coastal and Estuary Ecosystem Ecology Laboratory, School of Marine and Tropical Biology, James Cook University, Townsville, Queensland 4811, Australia *Email: adam.barnett@utas.edu.au ABSTRACT: The diet of the broadnose sevengill shark Notorynchus cepedianus was investigated over 3 years from 2 coastal locations in south-east Tasmania: the Derwent Estuary and Norfolk Bay. In general, individuals from both locations consumed the same broad dietary categories (sharks, batoids, teleosts and mammals). However, within these categories, species composition differed. Variations in chondrichthyan prey consumed matched estimations of prey abundance: Mustelus antarcticus was the primary prey in Norfolk Bay, where it was also the most abundant prey species; similarly, Squalus acanthias was an important prey and the most abundant in the Derwent Estuary. A decline in the catch rates of N. cepedianus and elasmobranch prey, in particular M. antarcticus over 3 years coincided with declines in dietary occurrence of M. antarcticus. Also, N. cepedianus and M. antarcticus abundances were both higher in Norfolk Bay than the Derwent Estuary. The correlation with diet and estimations of predator and prey relative abundance suggests N. cepedianus may move into coastal areas to exploit regular seasonal abundant resources, but they can also be versatile opportunistic predators that exploit a temporarily abundant resource. KEY WORDS: Shark · Notorynchus cepedianus · Diet · Spatial scale · Mustelus antarcticus Full text in pdf format PreviousNextCite this article as: Barnett A, Abrantes K, Stevens JD, Yick JL, Frusher SD, Semmens JM (2010) Predator–prey relationships and foraging ecology of a marine apex predator with a wide temperate distribution. Mar Ecol Prog Ser 416:189-200. https://doi.org/10.3354/meps08778 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 416. Online publication date: October 14, 2010 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2010 Inter-Research." @default.
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• W2124167418 date "2010-10-14" @default.
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• W2124167418 title "Predator–prey relationships and foraging ecology of a marine apex predator with a wide temperate distribution" @default.
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