Search results
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Information on the spawning season and gonadosomatic indices of Dissostichus mawsoni from Subarea 88.1 in the 2001/02 season
Dissostichus mawsoni were collected from Sub-area 88.1 in the 2001-2002 season by the New Zealand bottom ... longline vessels Janas and San Aotea II operating in the Exploratory Fishery. The onset of the spawning ... season was identified as late autumn (May). A significant difference in the condition of fish between ... summer and autumn was noted, and this may be a result of migration f or spawning. The maximum GSI ...
Meeting Document : WG-FSA-02/31 : Author(s): G.J. Patchell (New Zealand)
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Seasonal and interannual variability of krill, salp and other zooplankton populations in the northwest Antarctic Peninsula region: summer 2001 in relation to the Long-Term AMLR Data Set
Abstract: The US AMLR Program conducted large area surveys in the Elephant Island-South Shetland ... field seasons to assess interannual variations. Mean and median krill abundance values in the Elephant ... Island area during the 2000/2001 field season were intermediate to highs in 1996 and lows in 1999 ... . Increased abundance relative to 1999 resulted in part from recruitment of the 1998/99 and 1999/2000 year ...
Meeting Document : WG-EMM-01/45 : Author(s): V. Loeb (USA)
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New corrections factors for the quantification of fish represented in pellets of the blue-eyed shag Phalacrocorax atriceps
cast) of the blue-eyed shag or imperial cormorant Phalacrocorax atriceps collected throughout the ... necessary for the quantification of fish represented in pellets. These factors were obtained for Notothenia ... , Notolepis coatsi and Electrona antarctica were represented in pellets but not found in the stomach contents ... . Fish were the main prey and N. coriiceps and H. antarcticus were the dominant species both in mass and ...
Meeting Document : WG-EMM-95/83 : Author(s): Silva, P., Casaux, R., Favero, M., Barrera-Oro, E.
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Geographical differences in the condition, reproductive development, sex ratio, and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Statistical Subarea 88.1)
toothfish Dissostichus mawsoni from mid-December to early April during the 2000-01 to 2004-05 fishing ... seasons aboard the autoliner San Aotea II have been analysed. Results of this study indicate measurable ... differences in a number of indices from toothfish found on the Ross shelf proper, as distinct from those ... sampled on the more isolated seamounts and features to the north. These are length modal distribution, sex ...
Meeting Document : WG-FSA-05/52 : Author(s): J.M. Fenaughty (New Zealand)
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The diet of Antarctic fur seals, Arctocephalus gazella, at King George Island, during the summer–autumn period
Abstract: The diet of non breeding male Antarctic fur seals, Arctocephalus gazella, was ... , krill and fish were the most frequent prey, occurring in an average of 97% and 69% of samples (n=128 ... ), followed by Cephalopods (12%). Myctophids constituted almost 90% of the fish predated, being Electrona ... antarctica and Gymnoscopelus nicholsi the most abundant and frequent prey species. All fish taxa identified ...
Meeting Document : WG-EMM-04/4 : Author(s): G.A. Daneri, A.R. Carlini, C.M. Hernandez and A. Harrington (Argentina)
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An updated assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity and extension taking commercial catch-at-length data into account
Abstract: The CPUE-based Age-Structured Production Model (ASPM) assessment of this resource by ... available over the past year. This leads to an improved picture of resource status compared to a year ... are at variance with the observed length frequency distributions for the fishery. It is important that ... the assessment model be refined to provide a consistent explanation of all the available data, as this ...
Meeting Document : WG-FSA-02/76 : Author(s): A. Brandão, D.S. Butterworth, B.P. Watkins and L. Staverees (South Africa)
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Preliminary results on the distribution and abundance of Antarctic krill (Euphausia superba) in the Weddell Sea, Southern Ocean
Abstract: Hydroacoustic data were collected to study the distribution and abundance of Antarctic ... krill relative to their predators in the Southern Ocean during annual logistic summer trips and ... dedicated research winter trips to Antarctica on board the South African RV SA Agulhas II. The 38, 120 and ... 200 kHz transducers mounted on the drop keel of the research vessel were used to collect acoustic data ...
Meeting Document : SG-ASAM-18/09 : Author(s): F.W. Shabangu
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Preparing for the Year of the Skate: proposed information collection and tagging protocol for skates
Abstract: Skates are an important bycatch of the toothfish fishery in the CCAMLR area and have ... -SAM paragraph 8.10) a review of data requirements and a “Year of the Skate” for 2008–09 whereby data ... skate assessment. This paper discusses improvements to the fishery derived data that may be required to ... better inform an assessment of Ross Sea skates. We propose options for the appropriate collection of such ...
Meeting Document : WG-FSA-07/39 : Author(s): S. Mormede, A. Dunn, J. Fenaughty, M. Francis, S. Hanchet, R. O’Driscoll and N. Smith (New Zealand)
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A multiple-frequency method for identifying and assessing the Antarctic krill stock in the Ross Sea (1989/90, 1997/98 and 1999/2000)
Abstract: The paper describes the criteria, based on the multiple frequency analysis, used in the ... Italian expeditions to the Ross Sea to discriminate Euphausia superba (krill) aggregations from Euphausia ... crystallorophias ones and from other scatters. They are based on the experimental data acquired in the expeditions ... applied to estimate krill biomass in the area of Ross Sea (22000 nm2), investigated from 19 to 26 December ...
Meeting Document : WG-EMM-00/37 : Author(s): M. Azzali, J. Kalinowski and G. Lanciani (Italy)
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Exploring age and growth dynamics of a historically overfished Sub-Antarctic fish species: The grey rockcod (Lepidonotothen squamifrons) in the vicinity of Heard Island and McDonald Island
Abstract: The grey rockcod (Lepidonotothen squamifrons) was fished to commercial extinction on ... the Kerguelen Plateau by unregulated fishing during the 1970s/80s. Since the mid-1990s little work has ... been performed to assess the status of this species within the Heard Island and McDonald Island region ... 24. Through the mapping of abundances the presence of three distinct geographical populations were ...
Meeting Document : WG-FSA-15/51 : Author(s): D. Maschette, D.C. Welsford and C. Gardner (Australia)