Search results
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Descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2003/04
Abstract: A descriptive analysis of the toothfish tagging programme carried out in the Ross Sea ... Zealand vessels were unavailable at the time of the analysis. A total of 4903 Antarctic toothfish have ... two years, when tagging has been part of the Conservation Measure, New Zealand vessels have tagged ... between 1.0 and 1.37 toothfish per tonne of catch. Tagging rates by area over the past three years have ...
Meeting Document : WG-FSA-SAM-05/10 : Author(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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Changes to seabird avoidance regulations in Alaska demersal longline fisheries based on scientific research on effectiveness of mitigation measures
longline fisheries off Alaska. One of the main recommendations is for the required use of paired streamer ... Washington Sea Grant Program (WSGP) on the effectiveness of seabird avoidance measures in the longline ... fisheries off Alaska. For complete details of the research, results, and recommendations, see the WSGP final ... (WG-FSA 01/35). Rigorous experimental tests of seabird avoidance measures on the local abundance ...
Meeting Document : WG-FSA-02/53 : Author(s): K.S. Rivera (USA)
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30 years of krill fisheries management – challenges remain
frequently. The reproduction and survival of krill are significantly affected by sea ice cover. This is of ... concern since key spawning, recruitment and nursery areas of krill are located in the Southwest Atlantic ... sector, an area that has been warming rapidly, resulting in a reduction in the extent and duration of ... establishment of CM 51-07 – distributing the trigger limit among statistical subareas – was a step in the right ...
Meeting Document : CCAMLR-XXX/BG/19 : Author(s): Submitted by ASOC
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Results from the random stratified trawl surveys to estimate distribution and abundance of Dissostichus eleginoides and Champsocephalus gunnari in the Heard Island region (Division 58.5.2) for 2010 and 2011
2011 on the RV Southern Champion, adding to the time series of annual surveys in Division 58.5.2 that ... information on abundance. Catches of D. eleginoides were at half or lower than in surveys from both years than ... the average catch for the previous four years (2006-2009). Catches of C. gunnari were very low, with ... the 2011 catch, at less than 0.5 t, 15% of the earlier four year average, and the 2010 catch being 60 ...
Meeting Document : WG-FSA-11/23 : Author(s): G.B. Nowara, S.G. Candy and T. Lamb (Australia)
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A PROPOSAL TO AMEND CONSERVATION MEASURE 24-01: THE APPLICATION OF CONSERVATION MEASURES TO SCIENTIFIC RESEARCH
Abstract: SC-CAMLR and its working groups have previously identified the lack of review of ... must provide a reasonable certainty that the state of knowledge will be advanced, and as such all ... review. Noting the recommendations of SC-CAMLR Australia proposes that revisions be made to Conservation ... more than one (1) tonne of Dissostichus spp. would be subject to review by SC-CAMLR; • Scientific ...
Meeting Document : CCAMLR-XXVII/34 : Author(s): Delegation of Australia
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Potential climate change effects on the habitat of Antarctic krill
summer foraging sites of many of these predators are concentrated between 0° and 90°W. Parts of this ... sector have experienced recent localised sea surface warming of up to 0.2°C per decade, and ... projections suggest that further widespread warming of 0.27° to 1.08°C will occur by the late 21st century. We ... assess the influence of projected warming on Antarctic krill habitat quality. The results divide the ...
Meeting Document : WG-EMM-13/20 : Author(s): S.L. Hill, T. Phillips and A. Atkinson (United Kingdom)
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An updated spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
population was restricted to those cells in which at least 5% of cell area was of a depth deemed suitable as ... that a proportion of the mature fish spawn each year. The model estimation of the maturity ogive is now ... similar to that estimated by histological analysis. This model represents our current best model of the ... spatial distribution and movement of Antarctic toothfish in the Ross Sea region given the movement ...
Meeting Document : WG-SAM-14/31 : Author(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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Using predators and their prey to characterise the status of the marine ecosystem at South Georgia
Abstract: Increased awareness about the present status of marine systems, including those where ... fisheries target the prey of natural predators, has led to recommendations about how information on the ... status of marine predators might be used to inform ecosystem-based management approaches. In the ... Antarctic, sustained ecological research has generated long-term data on the performance of marine predators ...
Meeting Document : WG-EMM-16/28 : Author(s): P. Trathan, S. Fielding, S. Hill, M. Belchier and J. Forcada
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Spawning pattern and type of fecundity in notothenioids collected around the Elephant and South Orkney Islands
Abstract: The frequency distribution of oocytes diameter and relative fecundity (FR) of 4 ... counting were carried out using an image analyzer in sub-samples of ovaries at different stages of ... development, while the determination of RF was performed by a gravimetric method. Five were the main ... distinctive finding derived from this study: (i) in mature ovaries of all species immature oocytes or pre ...
Meeting Document : WG-FSA-16/22 : Author(s): G. Plaza, P.M. Arana, F. Becker, A. Zavatteri and V.H. Castillo
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An approach to feedback management (FBM) of the krill fishery based on routine acoustic data collection and intermittent land-based predator studies
Abstract: The conservation measure regarding (or stipulating) the interim distribution of trigger ... level in the fishery of Antarctic krill in Subareas 48.1 through 48.4 (CM 51-07) has continuously been ... . As the trigger level lacks any form of relationship with the actual stock condition this approach is ... reported continuously during the fishing season as measure of the available prey field. This information ...
Meeting Document : SC-CAMLR-XXXVI/BG/20 : Author(s): Delegations of Norway, China and Chile