Resultados de la búsqueda
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Descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in Subareas 88.1 & 88.2 for the years 2000–01 to 2012–13
Abstract: We provide an update of the descriptive analyses of the toothfish tagging programme in ... released and 95 recaptured since 2001. In recent years, most vessels have achieved or exceeded the required ... tagging rate of one toothfish per tonne of catch in the Ross Sea region. Tag recapture data showed that ... , North) in the Ross Sea region, 44 have moved from the Shelf to the Slope, 31 have moved from the Slope ...
Meeting Document : WG-FSA-13/49 : Autor(es): S. Parker, A. Dunn, S. Mormede and S. Hanchet (New Zealand)
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Stable isotope analysis of tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni) in the Ross and Amundsen Sea regions
Abstract: Stable isotopes of carbon and nitrogen (δ 15 N and δ 13 C) in Antarctic toothfish ... (Dissostichus mawsoni) muscle were measured to study the trophic connections of Antarctic toothfish in the Ross ... lipid in muscle on δ 13 C in a way that did not compromise the accuracy of δ 15 N measurements. We found ... considerable variability in δ 15 N and δ 13 C of toothfish that were not explained by fish length, sex ...
Meeting Document : WG-EMM-14/50 : Autor(es): M.H. Pinkerton, S.J Bury, J.C.S. Brown, J. Forman and A. Kilimnik (New Zealand)
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Assessment models for Patagonian toothfish in research block 58.4.4b_1 (SSRU 58.4.4bC) for the years 1990-2014
assessments of Dissostichus eleginoides in the research block 58.4.4b_1 following the recommendation of the WG ... observations in 2008 from OB_1a model (OB_1b model), and 3) modified OB_1b model as fix of fishing selectivity ... estimates of OB_1b model (OB_1b_noage model). The fits to CPUE in 2008 and MPD profiles for tags in the same ... year in OB_1a model were spurious. This suggests that Shinsei-maru No. 3 was learning operation in its ...
Meeting Document : WG-SAM-15/25 : Autor(es): K. Taki (Japan), S. Mormede (New Zealand) and T. Ichii (Japan)
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Biomass of Antarctic krill around South Shetland using 2-dB difference method in April 2016
Abstract: Antarctic Krill plays an important role in Antarctic ecosystems as the medium that ... connects phytoplankton to penguins, seals, and whales. It is also in the limelight as an important protein ... it is surrounded by Darke Passage in North, Weddle Sea in East, and Bransfield Strait in South ... regulation that limits Krill catch amount using fishing survey and acoustic assessment data in order to ...
Meeting Document : WG-EMM-16/60 : Autor(es): Delegation of the Republic of Korea
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Dynamics of Antarctic krill in the Bransfield Strait during austral summer and autumn investigated using acoustic data from a fishing vessel
Abstract: The Antarctic krill fisheries have evolved to operate in ever more concentrated ... geographical areas of predictable high krill densities, and knowledge about trends and variability in krill ... fishing vessels might help provide such insight. In the present work, the dynamics of krill with regards ... studied using acoustic data from the Chinese krill fishing vessel ‘Fu Rong Hai’ operating in the ...
Meeting Document : WG-EMM-17/40 : Autor(es): X. Wang, G. Skaret, O.R. Godø and X. Zhao
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Selectivity-induced bias in growth parameter estimates
Abstract: A short simulation study has been carried out to investigate the size of the bias in ... being included in catch samples. Fish were included in catch samples from the population with ... selectivity function used in the simulations closely matched those used for current toothfish assessments in ... producing considerably lower estimates of L? and higher estimates of K than in the true population. The ...
Meeting Document : WG-FSA-SAM-05/19 : Autor(es): G.P. Kirkwood (United Kingdom)
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Modifications to the Generalised Yield Model in 2004, version GYM501E.EXE
Abstract: The Generalised Yield Model is used by the WG-FSA in the assessments of Champsocephalus ... gunnari, Dissostichus eliginoides and Euphausia superba. Its current version is GYM501D.EXE. In the course ... in 2004 an error in the calculation of the recruitment series from survey data was detected. This ... error does not affect the assessments undertaken in recent years. This paper presents the nature of the ...
Meeting Document : WG-FSA-04/91 : Autor(es): A.J. Constable (Australia)
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PROPOSAL FOR AN EXTENSION TO THE MARK–RECAPTURE EXPERIMENT TO ESTIMATE TOOTHFISH POPULATION SIZE IN THE SOUTH OF SUBAREA 48.4
Abstract: 1. A three-year tagging study in the South of Subarea 48.4 was initiated in the 2008/09 ... , size, movement and growth of both Dissostichus eleginoides and Dissostichus mawsoni in the South of ... 48.4; 2. In 2008/09 a total of 214 D. eleginoides and 192 D. mawsoni were tagged and released. Two ... tagged D. mawsoni were recaptured in the first season. 3. Macrourids and rajids dominated finfish bycatch ...
Meeting Document : WG-FSA-09/18 : Autor(es): J. Roberts and D.J. Agnew (United Kingdom)
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A comparison of densities and length distribution of the Champsocephalus gunnari stock in Subarea 48.3 between years 1994 and 1995
Abstract: Mean densities and length structure of Champsocephalus gunnari obttained in the 1994 ... and 1995 surveys conducted in subarea 48.3 by BIP Dr: E L HOLMBERG are compared. Haul locations were ... ; 151–250 and 251–500 m depth strata. The cluster structure is considered as a nested factor in an ANOVA ... design. Forty five stations in the first cruise and 48 in the second were analyzed. Of these, 51 pairs of ...
Meeting Document : WG-FSA-95/34 : Autor(es): Marschoff, E., Calcagno, J., Gonzalez, B.
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DEVELOPING MODELS OF ANTARCTIC MARINE ECOSYSTEMS IN SUPPORT OF CCAMLR AND IWC
is currently in draft form open to comment and is being developed to provide an introduction to the ... to the use of ecosystem models in CCAMLR and the IWC and a history of the developmental work in those ... that need to be considered in parameterising a model, providing input data for those models and for ... addressing uncertainties in this process. Lastly, it summarises the modelling platforms being developed in ...
Meeting Document : WG-EMM-08/14 : Autor(es): A. Constable (Australia)