Resultados de la búsqueda
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Supervised and unsupervised (RapidKrill) estimates of krill density from DY098
up with a similar estimate of krill NASC and krill density as the supervised method. An ... produces a krill density of 8.60 gm-2, compared with 21.76 gm-2 (supervised) or 20.41 gm-2 (unsupervised ... ). Author(s): A. Ariza, S. Fielding and R. Blackwell Title: Supervised and unsupervised (RapidKrill ...
Meeting Document : SG-ASAM-2019/09 : Autor(es): A. Ariza, S. Fielding and R. Blackwell
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Preliminary assessment of the South Georgia ray populations
Abstract: We modelled the ray population at South Georgia using a surplus production model ... implemented in a Bayesian framework. Catch and CPUE data were reconstructed for the time series 1985 – 2006 ... from a variety of sources, and included the consideration that since 2004 the practice of cutting rays ... capacity but not with respect to r, the intrinsic rate of growth of the ray population. We chose a ...
Meeting Document : WG-SAM-07/11 : Autor(es): D.J. Agnew, R. Mitchell, T. Carruthers, J. Roberts, R. Hillary and J. Pearce (United Kingdom)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in SSRU 882E including data from the 2005/06 season
in a slightly higher estimate of initial biomass than in 2005, though this was mostly due to a ... estimated to be 352 t for the reference case and 366 t for the all vessels case, assuming a future fishing ... selectivity equal to the maturity ogive. Author(s): A. Dunn and S.M. Hanchet (New Zealand) Title: Assessment ...
Meeting Document : WG-FSA-06/48 : Autor(es): A. Dunn and S.M. Hanchet (New Zealand)
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An updated descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 and 88.2 up to 2005/06
Abstract: A descriptive analysis of the toothfish tagging programme carried out in Subareas 88.1 ... still only available for about half of the non-New Zealand vessels for 2003-04. A reported total of 10 ... . About 17% of the recaptures could not be matched to a release observation, mainly because of missing ... fish in the Ross Sea was very close to the size composition of the catch. Author(s): A. Dunn and S.M ...
Meeting Document : WG-FSA-06/34 : Autor(es): A. Dunn and S.M. Hanchet (New Zealand)
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Approaches to monitoring and assessing the abundance of rattails (Macrourus spp.) and skates in the Ross Sea
Abstract: This report presents results from a desktop study to consider approaches to monitoring ... , and acoustic surveys. We recommend that a random bottom trawl survey would be the best approach ... range 600–1500 m to obtain a precise estimate of bycatch abundance in the area of highest densities ... (SSRUs 881E, G, H, I, J, and K). A trawl survey could also be used in conjunction with other methods of ...
Meeting Document : WG-FSA-05/22 : Autor(es): R.L. O’Driscoll, S.M. Hanchet and B.A. Wood (New Zealand)
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Population and survival trends of wandering albatrosses (Diomedea exulans) breeding on Macquarie Island
effort and survival varied markedly with breeding numbers declining from a peak in 1964 to near ... extinction levels in the mid 1980’s. Underlying this decline was a significant decrease in juvenile survival ... and, to a lesser extent, adult survival. These survival changes were coincident with changes in ... . Author(s): A. Terauds, R. Gales, R. Alderman and G.B. Baker (Australia) Title: Population and survival ...
Meeting Document : WG-FSA-04/50 : Autor(es): A. Terauds, R. Gales, R. Alderman and G.B. Baker (Australia)
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Observations of demersal fish, benthic communities and seafloor composition of the Southern Ocean Atlantic sector from the ICEFISH 2004 cruise
Abstract: A multi-disciplinary research cruise in the Atlantic sector of the Southern Ocean was ... Rocks, South Georgia, the South Sandwich Islands, and Bouvetoya Island from 5 June to 30 June, 2004. A ... ICEFISH cruise trawl deployments was 9105 specimens of 29 species. A wide contrast in finfish and ... South Sandwich Islands and Bouvetoya, where the isolation of the latter island likely played a role in ...
Meeting Document : WG-FSA-04/61 : Autor(es): C.D. Jones, S.J. Lockhart and D.F. Doolittle (USA)
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Maximum entropy reconstruction of stock distribution and inference of stock density from line-transect acoustic survey data
Abstract: We present a maximum entropy (MaxEnt) method for inferring stock density and mapping ... account of spatial correlation in the observed data and seeks to reconstruct a distribution of density ... a candidate solution under the constraint of the observed data to progress towards a converged ...
Meeting Document : WG-EMM-02/35 : Autor(es): A.S. Brierley, S.F. Gull and M.H. Wafy (United Kingdom)
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Genetic variation among populations of the Antarctic toothfish: evolutionary insights and implications for conservation
differences among populations, a significant fixation index (Fst) and between population differentiation via a ... Mantel test. From a conservation perspective, low levels of genetic diversity may be indicative of ... fisheries in a manner that will help prevent the loss of unique genetic variation from regional overfishing ...
Meeting Document : WG-FSA-01/69 : Autor(es): R.W. Parker, K.N. Paige and A.L. DeVries (USA)
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BEACH DEBRIS SURVEY SIGNY ISLAND, SOUTH ORKNEY ISLANDS 1996/97
classified by type, material, weight and size categories. Logistical difficulties prevented a January survey ... from being carried out at Cummings Cove. A total of 34 items weighing 1.61 kg were collected at ... Cummings Cove, 18 items weighing 1.42 kg were found at Foca Cove and 6 items with a total weight of 0.68 kg ... follows a continuing downward trend since 1993/94. The proportion of plastic items found remained high ...
Meeting Document : CCAMLR-XVI/BG/6 : Autor(es): Delegation of the United Kingdom