Title A balanced model of the food web of the Ross Sea, Antarctica
Author Pinkerton, M.H.; Bradford-Grieve, J.M.; Hanchet, S.M.
Author Affil Pinkerton, M.H., National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand
Source CCAMLR Science, Vol.17, p.1-31. Publisher: Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), International. ISSN: 1023- 4063
Publication Date 2010
Notes In English GeoRef Acc. No: 309667
Index Terms Antarctica--Ross Dependency; Southern Ocean--Ross Sea; Antarctica; carbon; Cetacea; Chordata; diet; Dissostichus mawsoni; ecology; Eutheria; fisheries; food chains; interspecific relations; Mammalia; models; Nototheniidae; organic carbon; Pisces; predation; productivity; Ross Dependency; Ross Sea; Southern Ocean; Tetrapoda; Theria; trophic analysis; Vertebrata
Abstract Presents model of food web focused on role of Antarctic toothfish Dissostichus mawsoni, consolidating quantitative information, tested for data consistency, on trophic links across all major biota of Ross Sea. Includes 38 trophic groups and is balanced in terms of annual flows of organic carbon in average recent year (1990-2000) prior to commencement of fishery. Model indicates that large toothfish production satisfies 6.5% of diet of Weddell seals, 5.6% of diet of orca and 2.6% of diet of sperm whales, and that depletion of Antarctic toothfish by fishing would not significantly change diet of predators of toothfish throughout Ross Sea, though importance of toothfish as prey items to the predators requires further investigation. Model shows that large toothfish consume 61% of annual production of medium-sized demersal fishes and 14% of annual production of small demersal fishes, implying potential for fishery to affect these prey through trophic cascades.
Publication Type journal article
Record ID 91389