Resultados de la búsqueda
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Risk categorisation for Macrourus whitsoni and Amblyraja georgiana in the Ross Sea
, and comparison of longline and trawl catch rates with other Antarctic areas suggest that population in ... . Amblyraja georgiana were categorized as risk status 3 – species that are exploited as bycatch, and have a ... limited reproductive potential, and/or other life history characteristics that make them especially ... the Ross Sea may be relatively large. Author(s): R.L. O’Driscoll (New Zealand) Title: Risk ...
Meeting Document : WG-FSA-05/21 : Autor(es): R.L. O’Driscoll (New Zealand)
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Model-based, ecosystem risk assessments of MPA scenarios in Planning Domain 1
Argentina and Chile can, if desired, be improved by changing the sizes of the coastal buffers that define ... to assess some of the risks associated with two marine protected area (MPA) scenarios in Planning ... Domain 1, one representing the MPA proposed by Argentina and Chile. We conclude that the MPA proposed by ... the General Protection Zones around the South Shetland and South Orkney Islands. We also conclude that ...
Meeting Document : SC-CAMLR-XXXVI/BG/27 : Autor(es): Delegation of the USA
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A krill–predator–fishery model for evaluating candidate management procedures
simulations. We present a range of performance measures that can be used to evaluate catch-allocation ... well as fishery performance. This evaluation must be conducted in the context of considerable ... transport of krill between these areas. Krill and predator population dynamics are implemented with coupled ... uncertainty, and structural uncertainty can be assessed by comparing and merging results from multiple such ...
Meeting Document : WG-EMM-05/13 : Autor(es): G.M. Watters, J.T. Hinke (USA), K. Reid and S. Hill (United Kingdom)
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Assessment of escape mortality of Antarctic krill (Euphausia superba) in trawls
(Euphausia superba) that escape from the most common mesh size used in the current commercial fishery. The ... on the mortality rates found. A decrease in body length was also found significantly correlated with ... increased mortality rate. The escape mortality rate from experiment parallels and considered to be closest ... to a realistic catching process in a 16 mm mesh size, was found to be 1-6%. Krill may be more ...
Meeting Document : WG-EMM-14/14 : Autor(es): B.A. Krafft (Norway) and L.A. Krag (Denmark)
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TARGET STRENGTH STUDIES ON ANTARCTIC SILVERFISH (PLEURAGRAMMA ANTARCTICUM) IN THE ROSS SEA
Abstract: Target strength (TS) determinations can be classified into several types: 1 ... free swimming fish in their natural habitat. A canvassing of the literature suggested that the type of ... study may influence the result. For example, some authors suggested that freezing the fish reduce the ... over-all backscatter of 30% (Sun et al. 1985), others that TS measurements on living fish ex situ would ...
Meeting Document : SG-ASAM-09/10 : Autor(es): M. Azzali, I. Leonori, I. Biagiotti, A. De Felice, M. Angiolillo, M. Bottaro and M. Vacchi (Italy)
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Recomendación de iniciar discusiones sobre la manera de planificar y organizar la labor de la Comisión para la Conservación de los Recursos Vivos Marinos Antárticos (CCRVMA)
Abstract: In recent years, there has been an increase in the number and complexity of issues that ... issues concurrently. Australia recommends that, given discussions held during the CCAMLR Symposium, and ... ways to more effectively plan and organise the work of the Commission. Australia proposes that the ... -setting exercise. As such, Australia recommends that the Commission: agree that an improved approach to ...
Meeting Document : CCAMLR-XXXIV/18 : Autor(es): Delegation of Australia
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Diet of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea region, Antarctica
. Overall, the diet of sub-adult toothfish was similar to that of adult toothfish, with a dominance of ... stomach contents of toothfish could be used to detect ecosystem change in the Ross Sea region, with a ... the Ross Sea continental slope (70°–73°S, 175°E–175°W). Variation of stomach contents with toothfish ... of baited autoline fishing gear was found to be nearly 11 times higher for icefish than for ...
Meeting Document : WG-FSA-12/52 : Autor(es): D.W. Stevens, M.R. Dunn, M.H. Pinkerton and J.S. Forman (New Zealand)
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Revised research plan for the 2015/16 exploratory longline fishery of Dissostichus spp. in Subarea 48.6
relatively consistent with that using the CPUE method (using Division 88.2H as a reference area) for ... , and also be more likely to detect tagged fish that had moved off research block to the continual slope ... reference area) were relatively consistent with the observed numbers for D. mawsoni in the block 48.6_2 for ... current research blocks for the second three-season research with the sample sizes re-estimated following ...
Meeting Document : WG-FSA-15/16 Rev. 1 : Autor(es): Delegation of Japan
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Antarctic fur seal predator performance indices for the South Shetland Islands 1987/88–2002/03
rate (C2b) data were recalculated for 1997/98-2001/02 to facilitate comparisons between sites. Long ... survival (85.8%) and natality (74.3%) all indicated that 2002/03 was a season of poor reproductive ...
Meeting Document : WG-EMM-03/54 : Autor(es): M.E. Goebel (USA)
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Distribution, abundance and acoustic properties of Antarctic silverfish (Pleuragramma antarcticum) in the Ross Sea
500 m. A weak layer at about 80 m depth was associated with juvenile silverfish of 50–80 mm standard ... length. Acoustic backscatter strength from both silverfish and krill marks increased with increasing ... acoustic biomass of silverfish in the study area was 592 000 t (95% confidence interval 326 000–866 000 t ...
Meeting Document : WG-FSA-10/P04 : Autor(es): R.L. O’Driscoll, G.J. Macaulay, S. Gauthier, M. Pinkerton and S. Hanchet