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Alternative assessment methods for toothfish at South Georgia
Abstract: We examine two alternatives to the survey recruitment/GY method for estimating ... usefulness of tagging data to estimate population size. We use two equations, the Jolly-Seber unbiased method ... biomass in 2002 was between 78,000 and 114,000 t. Author(s): Kirkwood, G., Payne, A., Agnew, D. Title ... toothfish abundance. An age structured production model (ASPM) is constructed and tuned to the CPUE series ...
Meeting Document : WG-FSA-SAM-04/17 : Автор(ы): Kirkwood, G., Payne, A., Agnew, D.
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Krill fishery report: 2010 update
. Approximately 40% of the catch has been taken by two vessels using the continuous fishing system. The forecast ... Area 48 and reported a total catch of 125826 t; two vessels used the continuous fishing system. The ... vessels using the continuous fishing system have exceeded 800 t of krill per day. Author(s): Secretariat ...
Meeting Document : WG-EMM-10/05 : Автор(ы): Secretariat
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Some notes on by-catch of fishes and salps caught by the fishery vessel Niitaka Maru in the vicinity of the South Shetland Islands (January to February 1999)
hauls and those estimated value was 20 to 3560 ind./t of krill. By-catch fishes fed on Thysanoessa ... (>2500 ind./t of krill) occurred in hauls with the low krill catch rates (Author(s): T. Iwami, S ...
Meeting Document : WG-EMM-00/54 : Автор(ы): T. Iwami, S. Kawaguchi and M. Naganobu (Japan)
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Results from the reduced groundfish survey conducted in CCAMLR Subarea 48.3 in January 2012
between the 26-28th January 2012. This survey was not intended to be a full biomass survey so only 20 ... . Author(s): J. Brown, S. Gregory, A. Stanworth, V. Carretero, G. Baker and M. Belchier (United Kingdom ... three size cohorts of fish identified including evidence of a new cohort of 2+ age fish (29-39cm). Catch ...
Meeting Document : WG-FSA-12/37 : Автор(ы): J. Brown, S. Gregory, A. Stanworth, V. Carretero, G. Baker and M. Belchier (United Kingdom)
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Towards an ecological risk assessment of krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)
future. Author(s): N. Kelly, M. Cox, L. Emmerson, S. Kawaguchi, B. Raymond, C. Southwell and D. Welsford ... 58.4.1 and 58.4.2) Microsoft Word File: emm-17-20.docx Approval: Approved Secretariat Workflow Status ...
Meeting Document : WG-EMM-17/20 : Автор(ы): N. Kelly, M. Cox, L. Emmerson, S. Kawaguchi, B. Raymond, C. Southwell and D. Welsford
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Advances in the use of airborne aerial survey techniques to estimate krill-eating penguin populations in Area 48
over the coming years and we will provide similar updates at regular intervals. Author(s): P.N.Trathan ...
Meeting Document : WG-EMM-14/05 : Автор(ы): P.N.Trathan, A.J. Fox, N. Ratcliff and P.T. Fretwell (United Kingdom)
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CPUEs and body length of Antarctic krill density during the 1997/98 season in Area 48
Shetland Islands and the South Orkneys Islands, the size range was from 30 to 50mm, and their modal size ... due to the difference of the fishing ground. Author(s): S. Kawaguchi (Japan) Title: CPUEs and body ...
Meeting Document : WG-EMM-99/48 : Автор(ы): S. Kawaguchi (Japan)
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IN SITU MEASUREMENTS OF TILT ANGLE DISTRIBUTION AND TARGET STRENGTH IN ANTARCTIC KRILL (EUPHAUSIA SUPERBA)
scarce. We conducted a field study in the Southern Ocean where one of the objectives was to acquire data ... presented in future reports. Author(s): G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R ...
Meeting Document : WG-EMM-08/29 : Автор(ы): G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R. Pedersen, A. Totland, T. Torkelsen (Norway) and X. Zhao (China)
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An iterative model to construct an age-length key to assess the age composition of a new fishery for Dissostichus eleginoides in Chilean waters
different from the one obteined by use of traditional method Author(s): H. Robotham V. and Z. Young U ... Abstract: Traditional calculation of catch age composition estimate requires that the age-length ... data and random length frecuency be sampled from the same population, in other case an age-length key ... is capable of providing biased estimates of age distribution. By using the iteration algorithm is ...
Meeting Document : WG-FSA-92/23 Rev. 1 : Автор(ы): H. Robotham V. and Z. Young U. (Chile)
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Steepness for Antarctic toothfish (Dissostichus mawsoni) based on life history
points that are commonly used in fisheries management. Thus, one cannot pick an arbitrary value of ... estimates of steepness and their use in stock assessments. Author(s): M. Mangel, J. Brodziak and G.M ...
Meeting Document : WG-FSA-14/32 : Автор(ы): M. Mangel, J. Brodziak and G.M. Watters (USA)
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