Search results
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Identification of important benthic areas for conservation – using shared data from the Domain 1 MPA planning process
located west of the Antarctic Peninsula in the Bransfield Strait and north of the South Shetland Islands ... , and around the South Orkney Islands. Data layers shared with all CCAMLR Members as part of the Domain ... demonstrates the value of shared datasets in facilitating additional, supporting analyses for MPA planning. The ... range of available data also has relevance to a wide variety of other CCAMLR work, in addition to MPA ...
Meeting Document : WG-EMM-16/35 : Author(s): M. Bristow, S. Grant, M. Santos and A. Capurro
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Genetic identification of fish caught as by-catch in the Antarctic krill fishery and comparison with observer records
identifications made on vessels by scientific observers. A total of 344 fish (primarily in the families ... ; however, DNA results show several less common Notothenidae species were identified as L. larseni. All of ... DNA barcoding. Many of the specimens (n=136) were recorded to family-level by observers; genetic ... barcoding markers allowed these specimens to be assigned to species level. The diversity of fish identified ...
Meeting Document : WG-EMM-18/30 : Author(s): A. Polanowski, J. Clark, D. Maschette, D. Welsford and B. Deagle
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Spatial distribution and population structure of juvenile Antarctic toothfish (Dissostichus mawsoni) in the South Shetland Islands (Subarea 48.1)
structure of juvenile D. mawsoni caught during bottom trawl survey on the shelves around the South Shetland ... abundant between 100 and 300 m depth. The sampled population was composed of 150 specimens measuring ... between 22 and 78 cm TL, equally distributed between sexes, most of them with gonads at immature stage of ... factor. Based on counts of annual growth increments from sagittal otolith sections, age estimates ranged ...
Meeting Document : WG-FSA-18/45 : Author(s): M. La Mesa, E. Riginella and C.D. Jones
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Population dynamics of black-browed and grey-headed albatrosses Diomedea melanophrys and D. chrysostoma at Campbell Island, New Zealand, 1942–96
Abstract: The numbers of Black-browed Albatrosses Diomedea melanophrys and Grey-headed ... increasing slightly at average rates of 1.1% and 2.1% per annum at two colonies. The long-term downward trend ... in numbers of the Grey-headed Albatross has continued into the 1990s, averaging annually between 3.0 ... Albatrosses show a typical biennial pattern of breeding. Both show low survival from fledging to first ...
Meeting Document : WG-FSA-04/58 : Author(s): S.M. Waugh (New Zealand), H. Weimerskirch (France), P.J. Moore and P.M. Sagar (New Zealand)
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On possible impact of new continuous krill fishing technology on juvenile fish and larvae
powerful pumping system for continuous pumping the catch out of the trawl bag. It was discussed the ... potential threats of new technology to Antarctic marine ecosystem. It was shown that application of this ... fishing technology may result in considerable by-catch of the juvenile fish and larvae in krill fishery ... . Author(s): S.M. Kasatkina Title: On possible impact of new continuous krill fishing technology on ...
Meeting Document : WG-FSA-06/23 : Author(s): S.M. Kasatkina
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Identification and speciation of Antarctic skates
Abstract: Two regions of mitochondrial (mt) DNA: cytochrome b and cytochrome c oxidase subunit 1 ... (COI) were sequenced in 9 species of Bathyraja skates from the Southern Oceans and New Zealand. Based ... Bathyraja n. sp. cf eatonii. There was no sequence divergence among samples of B. n. sp. “dwarf” from the ... Ross Sea and South Atlantic Ocean, the DNA sequence divergences are indicative of differentiation among ...
Meeting Document : WG-FSA-07/27 : Author(s): P.J. Smith, C.D. Roberts, A.L. Stewart, M. McVeagh and C.D. Struthers (New Zealand)
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A single-area stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in SSRU 88.2E for the 2004/05 season
excluding preventing very low estimates of stock size. Monte-Carlo Markov Chain (MCMC) diagnostics suggested ... some evidence of non-convergence, particular in the declining right-hand limb of the fishing ... selectivity parameters. MCMC estimates of initial (equilibrium) spawning stock abundance (B0) were very ... , were estimated to be 670 t. However, as the fishing selectivity was estimated to be to the right of the ...
Meeting Document : WG-FSA-05/31 : Author(s): A. Dunn, D.J. Gilbert and S.M. Hanchet (New Zealand)
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An assessment of seabird interactions with longlining operations for Dissostichus eleginoides around South Georgia, March–May 1997
interactions with seabirds, and the effectiveness of measures employed to mitigate seabird mortality. In this ... setting operations and all but one during April, giving an average mortality rate of 0.018 birds/1000 ... hooks, and 0.099 birds/1000 observed hooks. Mortalities consisted of nine white-chinned petrels, two ... into the side of the vessel. Few birds were generally seen following the vessel during setting ...
Meeting Document : WG-FSA-97/09 : Author(s): Ashford, J.R., Croxall, J.P.
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2007 assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
Abstract: The ASPM assessment of the Prince Edward Islands toothfish resource by Brandão and ... updated to take account of further catch, GLM standardised CPUE and catch-at-length information that has ... 48.3 are used. The resource is estimated to be at about 37% of its average pre-exploitation level in ... terms of spawning biomass. It is suggested that it would be prudent to restrict annual legal catches to ...
Meeting Document : WG-FSA-07/34 Rev. 1 : Author(s): A. Brandão and D.S. Butterworth (South Africa)
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Time series of Drake Passage Oscillation Index (DPOI) from 1952 to 2005, Antarctica
Abstract: An assessment of the environmental processes influencing variability in the recruitment ... and density of Antarctic krill (Euphausia superba DANA) is important as variability in krill stocks ... krill recruitment and density in the Antarctic Peninsula area with an environmental factor; strength of ... , between Rio Gallegos (51°32’S, 69°17’W), Argentina, and Base Esperanza (63°24’S, 56°59’W), at the tip of ...
Meeting Document : WG-EMM-05/17 : Author(s): M. Naganobu and K. Kutsuwada (Japan)