Search results
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Revised research plan for the 2013/14 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a
in the last WG-SAM meeting. We tentatively recalculated a sample size of Dissostichus spp in each ... block in such a way that the numbers of tag recoveries in the 2016 season shows an approximately 0.3 of ... coefficient variance of biomass estimate from the bootstrapped procedure, under the condition that the ... block, in order to promote successful stock assessment. The separation rule was one of the major ...
Meeting Document : WG-FSA-13/40 : Author(s): Delegation of Japan
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Relationships between the distribution of whales and Antarctic krill Euphausia superba at South Georgia
Abstract: The distribution of whales and krill in two survey boxes north of South Georgia was ... examined by comparing sightings and underway acoustic data collected as part of a multidisciplinary ... research cruise during January/February 1998. A total of 222 cetaceans of 10 species was recorded with ... frequent. The largest aggregation of cetaceans (21 southern right whales, 18 fin whales (Balaenoptera ...
Meeting Document : WG-EMM-99/30 : Author(s): K. Reid, A.S. Brierley (United Kingdom) and G.A. Nevitt (USA)
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Foraging response of Antarctic fur seals to changes in the marine environment
Abstract: This study examined the relative contribution of environmental variation and the ... seasonal demands of pup rearing on the foraging behaviour of female Antarctic fur seals Arctocephalus ... recorders measured the diving behaviour of 72 individuals during a total of 385 foraging trips totalling ... 1964 d at sea. The frequencies of krill, fish and squid in the diet were estimated from prey items ...
Meeting Document : WG-EMM-99/35 : Author(s): D.J. McCafferty, I.L. Boyd, T.R. Walker and R.I. Taylor (United Kingdom)
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Water mass distribution and circulation west of the Antarctic peninsula and including Bransfield Strait
Abstract: Historical hydrographic data from Bransfield Strait and the region west of the ... Antarctic Peninsula were analyzed to provide a description of water mass distributions and circulation ... patterns. Circumpolar Deep Water (CDW), which is characterized by temperatures above 1.0°C, salinities of ... this water mass floods the continental shelf west of the Antarctic Peninsula. CDW is also found in ...
Meeting Document : WG-EMM-95/67 : Author(s): Smith, D.A., Lascara, C.M., Klinck, J.M., Hofmann, E.E.
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Spatial scales of benthic invertebrate habitats from fishery by catch and video transect data in the Ross Sea region
presence of sponge and/or gorgonian bycatch are identifiable, as are several areas of dense fishing effort ... with no evidence of sponge or gorgonian presence. Identifiable sponge and/or gorgonian habitats ... occurred at a typical scale of 10-30 km 2, though some sponge habitats appeared larger. Spatial analysis of ... these data allows the detectability of sponges and gorgonian corals to be estimated, along with changes ...
Meeting Document : WG-EMM-10/28 : Author(s): S.J. Parker, R.G. Cole and S.M. Hanchet (New Zealand)
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A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward Islands
Abstract: Subantarctic skuas Catharacta antarctica are key predators of burrowing petrels at sub ... -Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas ... December 2001. Prince Edward Island (46 km 2) remains free of introduced mammals, whereas Marion Island ... (290 km 2) had a feral population of cats from the 1950s to 1980s, and still supports a large ...
Meeting Document : WG-EMM-10/P03 : Author(s): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
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Preliminary examination of otolith microchemistry to determine stock structure in Antarctic toothfish (Dissostichus mawsoni) between SSRU 88.1C and 88.2H
Abstract: Life history characteristics of Antarctic toothfish (Dissostichus mawsoni), were ... concentrations in the otolith edge and then to (ii) assess the potential of natal signatures to distinguish ... shown. This resulted in the correct classification of 63% of fish overall to their original capture ... sites. Discrimination of otolith natal signatures using Al:Ca and Zn:Ca showed greater classification ...
Meeting Document : WG-SAM-14/33 : Author(s): R. Tana, B.J. Hicks, C. Pilditch and S.M. Hanchet (New Zealand)
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A CHARACTERISATION OF THE TOOTHFISH FISHERY IN SUBAREAS 88.1 AND 88.2 FROM 1997/98 TO 2008/09
Subarea 88.1 and for 8 years in Subarea 88.2. During that time a large amount of distributional and ... biological data has been collected on toothfish and the associated bycatch. The purpose of this report is to ... fishery which may be indicative of localised stock depletion. We considered here the catch limit, changes ... in depth/location of fishing, and length and age structure of the population. The catch limit was ...
Meeting Document : WG-FSA-09/36 : Author(s): S.M. Hanchet, A. Dunn and S. Mormede (New Zealand)
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Evaluation of Antarctic krill biomass and distribution off the South Orkney Islands 2011-2015
Institute of Marine research, Norway near the South Orkney Islands since 2011. The survey has been conducted ... has varied between years in particular due to ice. In order to allow for comparison of distribution ... and abundance of krill near the South Orkneys among years, we here attempt to generate a coherent ... series of krill density estimates from the 5 years of surveys. We follow the CCAMLR protocol for biomass ...
Meeting Document : WG-EMM-15/54 : Author(s): G. Skaret, B.A. Krafft, L. Calise (Norway), J. Watkins (UK), R. Pedersen and O.R. Godø (Norway)
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A case of giant squid attack on Antarctic toothfish Dissostichus mawsoni Norman, 1937 (Perciformes, Nototheniidae) caught on bottom-set longline in the Ross Sea
Abstract: In the beginning of February 2005, during the hauling of bottom-set longline in the ... Ross Sea (East Antarctic) from the depth of 1480 m to the surface a very large squid taken a large ... individual of Antarctic toothfish D. mawsoni (Norman, 1937) with a size of 160 cm and weight of 58 kg caught ... by a longline hook, was hauled up to the board of longliner VOLNA. Squid was very active and did not ...
Meeting Document : WG-FSA-06/P3 : Author(s): Petrov, A.F.