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A simulation study of krill fishing by an individual Japanese trawler
krill trawler over a half-month period. It is based on an underlying krill distribution model whose ... Paper Title: A simulation study of krill fishing by an individual Japanese trawler Abstract ... / Description: A model is set up for the operation (which includes both searching and fishing) of a Japanese ... is compared with (and partially tuned to) statistics for a sample of data from the commercial fishery ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 1–108 : Autor(es): Butterworth, D.S.
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An assessment of Chaenocephalus aceratus and Pseudochaenichthys georgianus in Subarea 48.3
for these two species by assuming that 75% of the ‘unidentified fish’ caught by the Soviet Union in ... Subarea 48.3 since 1977 but have never been fully assessed by the Working Group on Fish Stock Assessment ... the years 1977 to 1988 consisted of catches of C. aceratus and P. georgianus. Biological, age-length ... future. Author(s): D.J. Agnew (Secretariat) and K.-H. Kock (Germany) Title: An assessment of ...
Meeting Document : WG-FSA-90/06 : Autor(es): D.J. Agnew (Secretariat) and K.-H. Kock (Germany)
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A simulation study of krill fishing by an individual JAPANESE trawler
Japanese krill trawler over a half-month period. It is based on an underlying krill distribution model ... Abstract: A model is set up for the operation (which includes both searching and fishing) of a ... the operation is compared with (and partially tuned to) statistics for a sample of data from the ... than in the model. Two ad hoc model modifications are introduced to eliminate this inconsistency ...
Meeting Document : SC-CAMLR-VII/BG/37 : Autor(es): D.S. Butterworth (Invited Expert)
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An assessment of the conservation status of albatrosses
, the Black-browed (Near Threatened) and Laysan Albatrosses are classified as Lower Risk. For two ... regarding population trend and status provides an inadequate basis for classification and these are assessed ... taxonomic revisions of albatrosses and the new IUCN criteria for identification of threatened taxa. The ... the 24 albatross species recognized in the new taxonomy, two species (Amsterdam Albatross and Chatham ...
Meeting Document : WG-FSA-97/59 : Autor(es): Croxall, J.P., Gales, R.
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AN ASSESSMENT OF ARTIFICIAL BAIT (NORBAIT™) AS A MEANS OF REDUCING THE INCIDENTAL CATCH OF MACROURUS AND OTHER BYCATCH SPECIES IN HIGH LATITUDE TOOTHFISH FISHERIES
to assess basic requirements such as ease of use, bait longevity on the hook, and catchability ... incidental species. This is a preliminary report based on subsequent trials carried out aboard the vessel San ... were set in both Subareas; a total of 137,000 experimental hooks. The evaluation was based on ... alternating sections (magazines or mags- there are approximately 1024 hooks per magazine on San Aspiring) of ...
Meeting Document : WG-FSA-08/52 : Autor(es): J.M. Fenaughty (New Zealand)
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An assessment of toothfish in Subarea 48.3 using CASAL
frequencies, and a poor fit to the CPUE data, for which an even higher process error CV was estimated (0.46 ... ). For the baseline assessment incorporating two fleets, the 2005 vulnerable biomass was estimated to be ... , the estimated long term yield is 4910 t for the baseline two-fleet assessment, while for the one-fleet ... Abstract: The CASAL software has been successfully applied to an assessment of the stock of ...
Meeting Document : WG-FSA-05/16 : Autor(es): R.M. Hillary, G.P. Kirkwood and D.J. Agnew (United Kingdom)
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An exploration of the biological data used in the CCAMLR Subarea 48.3 Patagonian toothfish stock assessments
Abstract: WG-FSA 2018 noted that changes in productivity parameters may impact assessment ... . Author(s): E. MacLeod, K. Bradley, T. Earl, M. Söffker and C. Darby Title: An exploration of the ... Consent: No Delegation responsibility for releasing documents: United Kingdom ...
Meeting Document : WG-SAM-2019/32 : Autor(es): E. MacLeod, K. Bradley, T. Earl, M. Söffker and C. Darby
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An assessment of toothfish in Subarea 48.3 using CASAL
Paper Title: An assessment of toothfish in Subarea 48.3 using CASAL Abstract / Description: This ... paper presents an assessment of the stock of toothfish around South Georgia (Subarea 48.3) using the ... dynamics is explored using Markov Chain Monte Carlo (MCMC) methods; methods for fast approximations to the ... , long-term yield calculations were undertaken, given the CCAMLR decision rules, for five main assessment ... and CPUE data are poorer for the one-fleet model than those seen in the two- fleet model. 71 An ... are undoubtedly rather high for an animal with the longevity of toothfish and its relatively low ... years refer to the fishing season that started in December prior to the year quoted. For example, year ... for the later period. The two estimated selectivity curves are shown in Figure 2. The year-class ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Autor(es): Hillary, R.M., G.P. Kirkwood and D.J. Agnew
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Long term movements and activity patterns of an Antarctic marine apex predator: the leopard seal
including one individual in two separate years. Whilst the sample size is small the results represent an ... habitat associations, taking into account location errors, indicated the tracked seals had an affinity for ... changed throughout the year with the highest values occurring during the summer which has implications for ... Abstract: Leopard seals are an important Antarctic apex predator that can affect marine ...
Meeting Document : WG-EMM-18/P09 : Autor(es): I.J. Staniland, N. Ratcliffe, P.N. Trathan and J. Forcada
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An acoustic estimation of krill densities to the north of South Georgia in January 1994
Abstract: Dual frequency (38 and 120 kHz) acoustic surveys were carried out in two regions along ... signal strength between the two frequencies (δMVBS = MVBS 120 kHz- MVBS 38 kHz) was used to discriminate ... provide further evidence of an extreme krill paucity around South Georgia in the 1993/4 season. Author(s ... ): Watkins, J.L., Brierley, A.S. Title: An acoustic estimation of krill densities to the north of South ...
Meeting Document : WG-EMM-95/74 : Autor(es): Watkins, J.L., Brierley, A.S.