Title Distribution and relative abundance of Antarctic toothfish (Dissostichus mawsoni) on the Ross Sea shelf
Author Hanchet, S.M.; Mormede, S.; Dunn, A.
Author Affil Hanchet, S.M., National Institute of Water and Atmospheric Research (NIWA), Nelson, New Zealand
Source CCAMLR Science, Vol.17, p.33-51. Publisher: Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR), International. ISSN: 1023- 4063
Publication Date 2010
Notes In English GeoRef Acc. No: 309666
Index Terms Antarctica--Ross Dependency; Southern Ocean--Ross Sea; Antarctica--Terra Nova Bay; Antarctica; Chordata; continental shelf; Dissostichus mawsoni; distribution; fisheries; migration; Nototheniidae; ontogeny; Pisces; population dynamics; predation; Ross Dependency; Ross Sea; Southern Ocean; Terra Nova Bay; Vertebrata; Victoria Land
Abstract Describes distribution and relative abundance of Antarctic toothfish using data from exploratory fishery, focusing on catches from Ross Sea shelf as area with greatest overlap between Dissostichus mawsoni and potential predators. Catch has been taken mainly from localized deep water off Terra Nova Bay, Ross Island, and in south of small- scale research unit adjacent to Ross Ice Shelf. Catch rates typically show high temporal and spatial variability. Most toothfish caught in southern Ross Sea were sub-adult and maturing fish, typically ranging from 60-130 cm in length, with some evidence for ontogenetic migration from east to west as they grow. Available data does not indicate northward contraction in range of D. mawsoni over course of fishery, though monitoring system for sub-adult fish would be prudent.
Publication Type journal article
Record ID 91390