Search results
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A three-frequency method to determine the abundance and the size of two euphausiid species (Euphausia superba and Euphausia crystallorophias)
Abstract: Euphausia superba and Euphausia crystallorophias dominate the biomass and play a key ... role in the Ross Sea pelagic ecosystem (Marr, 1962; Azzali et al., 1999). To estimate the abundance of ... obtain information about the mean size (length) of the organisms in each aggregation. In principle the ... abundance of the two populations can be estimated by single-frequency acoustics, using the standard echo ...
Meeting Document : WG-EMM-01/63 : Author(s): M. Azzali, J. Kalinowksi, G. Lanciani and I. Leonori (Italy)
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Investigating the uncertainty of age determinations for Patagonian toothfish (Dissostichus eleginoides) and the implications for stock assessment
Abstract: We revised the method of Candy et al. (2012) to estimate the ageing error matrix ... (misclassification matrix) to address some issues regarding true ages not being the mode at the extremes of the ... matrix and a lack of smoothness in the probabilities for ages above 25 years. Positive errors now ... aggregate into the plus group, negative errors are truncated below the minimum age, and fish with true ages ...
Meeting Document : WG-FSA-14/46 : Author(s): P. Burch, P. Ziegler, W. de la Mare and D. Welsford (Australia)
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Results of the research for the exploratory longline fishery for Dissostichus spp. in SSRUs C and E in Division 58.4.1 in 2012/13 of Korea
Abstract: In the Division 58.4.1 there are two stocks of Dissostichus mawsoni; one extends from ... the SSRU 58.4.1C to the SSRU 58.4.2A, and the other one to the SSRU 58.4.1H. The population sizes were ... information to assess the stocks and deliberate proper measurements for sustainable utilize such as for ... precautionary catch limits. Therefore, the Korean scientists and fishing company (Insung Co.) submitted ...
Meeting Document : WG-SAM-13/28 : Author(s): I.J. Yeon, Y.J. Kwon, D.W. Lee, S.G. Choi, and K.J. Seok (Republic of Korea)
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Modelling the dynamics of krill populations in the Antarctic Peninsula region
Abstract: The current long-term estimates of mean recruitment rates suggest that the population ... is unsustainable, as they are too low to maintain the estimated mortality rate. The variable annual ... estimates of recruitment to the population can be used to model in detail interannual variation in the ... population dynamics of krill and estimate the expected mortality rates. A number of models of the population ...
Meeting Document : WG-EMM-99/56 : Author(s): E.J. Murphy (United Kingdom), A. Constable (Australia) and D. Agnew (United Kingdom)
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Adélie penguins as indicators of the state of the sea-ice in Adélie Land
Abstract: In the 2013-14 reproductive season, the 26,000 pairs of Adélie penguins from Pétrel ... factors. First, the season saw an extreme sea-ice extent that forced Adélie parents to cover great ... distances to reach the open water during the incubation and early chick-rearing phases. The extended absence ... of parents meant that the partner and/or the chick fasted longer at the nest, increasing the risk of ...
Meeting Document : WG-EMM-17/01 Rev. 1 : Author(s): Y. Ropert-Coudert, A. Kato and C. Barbraud
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Comparison between the CCAMLR-2000 and KY 1988 surveys on environmental variability of krill in the Scotia Sea, Antarctica
Abstract: We assessed the environmental variability of Antarctic krill (Euphausia superba ... ) distribution with comparison between the CCAMLR 2000 Survey and similar scale datasets partially by the ... Japanese R/V Kaiyo Maru Survey in the 1987/88 austral summer season in the Scotia Sea. There were distinct ... differences between the 2000 and 1987/88 Surveys with regard to sea ice extent, oceanographic structure and ...
Meeting Document : WG-EMM-02/43 : Author(s): M. Naganobu (Japan), M. Brandon (United Kingdom), K. Ito, K. Segawa (Japan) and V. Siegel (Germany)
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) - Version 2015 - Part C: Data analysis and MPA scenario development
Abstract: Germany intends to present the Working Group on Ecosystem Monitoring and Management (WG ... EMM) the background document that provides the scientific basis for the evaluation of a marine ... protected area (MPA) in the Weddell Sea planning area. The contents and structure of the whole document ... reflect its main objectives, i.e. to set out the general context of the establishment of MPAs and to ...
Meeting Document : WG-EMM-15/46 : Author(s): K. Teschke, H. Pehlke, M. Deininger, L. Douglass and T. Brey on behalf of the German Weddell Sea MPA project team
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Preliminary standardised CPUE analysis of the New Zealand part of the toothfish fishery in CCAMLR Subarea 88.1, from 1988/89 to 2002/03
Abstract: A toothfish fishery has operated during the Antarctic summer (December- May) from 1997 ... to 2003, in Subareas 88.1 and 88.2 in the region of the Ross Sea. A preliminary standardised analysis ... alternative toothfish CPUE analyses for the 1998 to 2002 seasons. The analysis of a data subset including only ... the two main vessels and the 3 main fishing grounds was the best fit to the data. This report updates ...
Meeting Document : WG-FSA-03/43 : Author(s): R.G. Blackwell and S.M. Hanchet (New Zealand)
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) – Version 2016 –Part B: Description of available spatial data
Abstract: The Delegation of Germany presents to the Scientific Committee the scientific ... background in support of the development of a marine protected area (MPA) in the Weddell Sea planning area ... . In accordance with the recommendations by WG-EMM-14 (SC-CAMLR-XXIII, Annex 6), this was done in three ... separate documents (Part A-C). SC-CAMLR-XXXV/BG/11 (Part A) sets out the general context of the ...
Meeting Document : SC-CAMLR-XXXV/BG/12 : Author(s): Delegation of Germany
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Scientific background document in support of the development of a CCAMLR MPA in the Weddell Sea (Antarctica) – Version 2016 – Part C: Data analysis and MPA scenario development
Abstract: The Delegation of Germany presents to the Scientific Committee the scientific ... background in support of the development of a marine protected area (MPA) in the Weddell Sea planning area ... . In accordance with the recommendations by WG-EMM-14 (SC-CAMLR-XXIII, Annex 6), this was done in three ... separate documents (Part A-C). SC-CAMLR-XXXV/BG/11 (Part A) sets out the general context of the ...
Meeting Document : SC-CAMLR-XXXV/BG/13 : Author(s): Delegation of Germany