Journal
NEW ZEALAND JOURNAL OF MARINE AND FRESHWATER RESEARCH
Volume 42, Issue 4, Pages 425-437Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00288330809509971
Keywords
fish; cephalopods; scampi; diet; top predator prey; proximate analysis
Categories
Funding
- Lewis Fitch Research Fund
- Whale and Dolphin Adoption Project.
- Department of Conservation
- New Zealand Ministry of Fisheries
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Campbell Plateau is an important fishing ground for the main commercial New Zealand species. Yet, studies on trophic interactions between species and their nutritional values are limited. The objectives of this study were to determine the proximate composition and energy contents of selected commercial and non-commercial marine species from Campbell Plateau and their fatty acid (FA) composition. and to evaluate the degree to which species can be differentiated by their FA compositions. We analysed 43 fish specimens from 5 different species (Macruronus novaezelandiae. Lepidorhynchus denticulauts, Pseudophycis bachus Hemerocoetes spp. and Squalus acanthias), 17 cephalopod specimens from 2 species (Nototodarus sloani and Enteroctopus zealandicus), and 6 Metanephrops challengeri (crustacean). The variation of energy contents between fish species was not significant, but their lipid and protein contents varied significantly. FA signatures distinguished the species analysed and, at a broader scale. the type of habitat. Within-species variability was important for benthic species. In general, the diet inference from FA trophic markers was consistent with reported diets from stomach contents.
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