Search results
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Video monitoring trial Avro Chieftain 2005 an interim report
monitoring system within 58.5.2. The initial results from the monitoring of the hauling are optimistic but ... need to be fully analysed against the observer data that was generated for the same period. There is ... confidence that the trial achieved the objectives required of monitoring the hauling but the results of ... monitoring the setting operation were unsatisfactory due to operational and technical limitations of the ...
Meeting Document : WG-FSA-05/74 : Author(s): B. Stanley (Australia)
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Stable isotope analysis of Southern Ocean fish tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni)
fishing vessels during the 2005/06 season in the Ross Sea CCAMLR Subarea 88.1 in order to investigate ... three trophic levels exist between icefish occupying the lowest trophic level, and Antarctic toothfish ... occupying the highest level. Some Antarctic toothfish sampled in this study occupied a similar trophic level ... according to their?15N signatures to killer whales and Weddell seals in McMurdo Sound, bluefin tuna in the ...
Meeting Document : WG-EMM-07/19 : Author(s): M.H. Pinkerton, S. Bury, S.M. Hanchet and D. Thompson (New Zealand)
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Variability and predictability of Antarctic krill swarm structure
Abstract: Swarming is a fundamental part of the life of Euphausia superba, yet we still know very ... little about what drives the considerable variability in swarm shape, size and biomass. We examined ... swarms across the Scotia Sea in January and February 2003 using a Simrad EK60 (38 kHz, 120 kHz ... ) echosounder, concurrent with net sampling. The acoustic data were analysed through applying a swarm ...
Meeting Document : WG-EMM-10/P10 : Author(s): G.A.Tarling, T. Klevjer, S. Fielding, J. Watkins, A. Atkinson, E. Murphy, R. Korb, M. Whitehouse and R. Leaper
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Ross Sea Bioregionalisation, Part II: Patterns of co-occurrence of mesopredators in an intact polar ocean ecosystem
Abstract: We report results of analyses of niche occupation among mesopredators in the Ross Sea ... the surface of the ocean, 2) capacity to utilize differing amounts of the water column (foraging depth ... and Snow petrel. The apex predators, Leopard Seal and Killer Whale ecotype A/B, were not included ... ). Data on depth of diving and diet were taken from the literature. Three patterns of horizontal spatial ...
Meeting Document : WG-EMM-10/12 : Author(s): G. Ballard, D. Jongsomjit and D.G. Ainley (USA)
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ENVIRONMENTAL FORCING AND SOUTHERN OCEAN MARINE PREDATOR POPULATIONS: EFFECTS OF CLIMATE CHANGE AND VARIABILITY
Abstract: The Southern Ocean is a major component within the global ocean and climate system and ... potentially the location where the most rapid climate change is most likely to happen, particularly in the ... include changes to the long interdecadal background signals such as the development of the El Niño ... opportunity to explore how biological communities respond to change. This approach is based on the premise ...
Meeting Document : WG-EMM-08/P06 : Author(s): P.N. Trathan, J. Forcada and E.J. Murphy
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DATA QUALITY ASSESSMENT IN CCAMLR: REQUIREMENTS FOR MINIMUM INTEGRITY TESTING TO ENSURE THAT DATA ARE FIT FOR PURPOSE
Abstract: The level of data quality assessment and ‘certification’ as ‘fit for purpose’ depends ... upon the different requirements for the data, together with a recognition that, however thorough a ... validation exercise the data are exposed to, there will always be some data that require some additional ... confirmation of their validity. In the context of CCAMLR, data may undergo one set of quality testing in order ...
Meeting Document : WG-SAM-09/05 : Author(s): Secretariat
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Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48
limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies the application in ... determining subarea or local area krill catch limits are evaluated relative to six criteria: (i) the degree to ... which information on biological relationships is considered, (ii) the cost of data collection, (iii) the ... reliability of required information, (iv) the ease of enforcement, (v) the effects on current fishing patterns ...
Meeting Document : WG-EMM-01/29 : Author(s): G. Watters and R. Hewitt (USA)
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FURTHER DEVELOPMENTS OF A SIMULATION MODEL, ‘PATCH’, FOR EVALUATING MANAGEMENT STRATEGIES TO CONSERVE BENTHIC HABITATS (VULNERABLE MARINE ECOSYSTEMS) WHICH ARE POTENTIALLY VULNERABLE TO IMPACTS FROM BOTTOM FISHERIES
ecosystems’ in order to maintain the ecological structure and function of, particularly, deep sea benthic ... habitats. Noting the paucity of data on the ecology of these habitats, this paper further develops a ... the most cost-effective way that fishers might be able to collectively enact this resolution? The UNGA ... requirement can be translated into a simple operational objective: Maintain the quality of habitats above the ...
Meeting Document : WG-FSA-09/42 : Author(s): A.J. Constable (Australia)
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An ecological risk assessment of current conservation measures for krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)
Abstract: Australia is adapting the risk assessment framework used in Area 48 to assess the risks ... and 58.4.2, off the coast of East Antarctica, and to evaluate whether the current management procedure ... relatively simple derivation of the risk assessment framework to assess whether the current conservation ... measures that are relevant to Divisions 58.4.1 and 58.4.2 sufficiently mitigate the risk of a krill fishery ...
Meeting Document : WG-EMM-18/37 : Author(s): N. Kelly, L. Emmerson, S. Kawaguchi, C. Southwell and D. Welsford
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Defining predator foraging ranges, illustrated using Adélie penguin foraging tracks from Mawson coast
Abstract: One step toward defining small-scale management units is to determine the areas most ... likely to be foraged by predators from one year to the next, i.e. what is a predator’s feeding range ... taking into account interannual variation in foraging locations? This paper considers the issues to be ... addressed in answering that question. The proposed method for defining foraging ranges is based on an ...
Meeting Document : WG-EMM-02/41 : Author(s): I.R. Ball, A.J. Constable, J. Clarke and L. Emmerson (Australia)