Search results
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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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Line weights of constant mass (and sink rates) for Spanish-rig Patagonian toothfish longline vessels
kg weights at 40 m intervals on longlines to minimise interactions with seabirds. The weights are ... collections of rocks enclosed in netting bags. The netting bags abrade on the seabed, rocks are lost and ... chartered Spanish-rig longline vessel to determine the statistical relationship in sink rates of longlines ... equipped with bags of rocks (4 kg, 6 kg and 8 kg) and lines with steel weights of equivalent masses. The ...
Meeting Document : WG-FSA-07/15 : Author(s): G. Robertson (Australia), C.A. Moreno, E. Gutiérrez (Chile), S.G. Candy (Australia), E.F. Melvin (USA) and J.P. Seco Pon (Argentina)
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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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Mercury concentrations in Patagonian toothfish, Dissostichus eleginoides Smitt 1898, among three distinct ocean basins
across the range examined. However, fish were significantly smaller within the Atlantic basin (mean=84.52 ... cm; 5.57 kg; n=142) than the Pacific (99.07 cm; 9.12 kg; n=15) and Indian (102.72 cm; 14.0 kg; n=29 ... size across the range examined and was less for Atlantic basin fish) mean=0.23 ppm) than either Pacific ... (0.73 ppm) or Indian basin (0.80 ppm) fish, which did not differ. The Pacific and Indian basin fish had ...
Meeting Document : WG-FSA-06/24 : Author(s): K. Dawson Guynn and M.S. Peterson (USA)
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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)
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Beach litter survey Signy Island, South Orkney Islands, 1993/94
Abstract: A beach litter survey was carried out on Signy Island, South Orkney Islands during the ... 1993/94 austral summer. Similar surveys were carried out during the 1990/91, 1991/92 and 1992/93 ... from any scientific research stations in the South Orkney Islands. The beach litter surveys carried out ... in 1990/91, 1991/92 and 1992/93 showed a drop in both the weight of debris and the total number of ...
Meeting Document : CCAMLR-XIII/BG/11 : Author(s): Delegation of United Kingdom
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Proposal for a longline survey on toothfish in Statistical Subarea 48.6 in 2017/18
Abstract: Norway proposes a plan to investigate the toothfish populations in the Statistical ... and acoustic techniques. The proposed research is pertinent to issues raised by the Scientific ... characterise the local toothfish populations in the area to better understand stock structure, movement ... patterns and improve estimation of population characteristics and thereby contribute to the development of ...
Meeting Document : WG-FSA-17/61 Rev. 1 : Author(s): Delegation of Norway
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Net monitoring on Norwegian krill fishing vessels, recent trials, and a proposal for amendment to CM 25-03 to accommodate cabled communication between net sensors and vessel
Abstract: Net monitoring during krill trawling is necessary to the industry and beneficial to ... trawl sensors. Norwegian krill vessels conducting continuous trawling use a cabled connection where the ... implemented on the FV Saga Sea because extensive trials carried out in 2017/18 with other alternatives were ... this particular rigging is compatible with the main objectives of CM 25-03, i.e. minimizing the ...
Meeting Document : SC-CAMLR-38/18 : Author(s): O.A. Bergstad