Résultats de la recherche
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Adélie penguin population change in the pacific sector of Antarctica: relation to sea-ice extent and the Antarctic Circumpolar Current
Abstract: One of the longest continuing data sets involving a marine organism in the Antarctic is ... on Ross Island, Ross Sea, 1959 to 1997. The sizes of these colonies have displayed significant ... interannual variability during the 29-yr period. We hypothesized that changes are related to natural ... physical environmental factors during that part of the record with comparable sea-ice satellite imagery ...
Meeting Document : WG-EMM-01/23 : Auteur(s): P.R. Wilson (New Zealand), D.G. Ainley, N. Nur, S.S. Jacobs (USA), K.J. Barton (New Zealand), G. Ballard and J.C. Comiso (USA)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea for the years 1997–98 to 2010–11
Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... model for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs ... 88.2A–B), using revised catch, catch-at-age, and tag-recapture data for the 2010–2011 seasons. The 2011 ... reference model using the selected trips tag data gave a similar, but slightly higher estimate of initial ...
Meeting Document : WG-FSA-11/42 : Auteur(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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A PRELIMINARY BALANCED TROPHIC MODEL OF THE ECOSYSTEM OF THE ROSS SEA, ANTARCTICA, WITH EMPHASIS ON APEX PREDATORS
Abstract: We report on the development of a mass balanced carbon-budget trophic model of the Ross ... Sea as a step towards investigating ecosystem effects of the fishery for Antarctic toothfish ... (Dissostichus mawsoni). The model has 30 trophic groups representing all the major biota of the Ross Sea. Many ... of the lower trophic level species in the model are grouped by functional role because information is ...
Meeting Document : WG-EMM-08/42 : Auteur(s): M.H. Pinkerton, J.M. Bradford-Grieve and S.M. Hanchet (New Zealand)
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BIOMASS ESTIMATES AND SIZE DISTRIBUTIONS OF DEMERSAL FINFISH ON THE ROSS SEA SHELF AND SLOPE FROM THE NEW ZEALAND IPY-CAML SURVEY, FEBRUARY-MARCH 2008
Abstract: during February and March 2008 as part of the International Polar Year. The main aim of ... the survey was to carry out a Census of Antarctic Marine Life in this regionfocussing on sampling the ... pelagic and benthic habitats on the shelf, slope, abyss, and seamounts in the Ross Sea region (CCAMLR ... Subarea 88.1). The shelf and slope were stratified by depth and at least three random trawls completed in ...
Meeting Document : WG-FSA-08/31 : Auteur(s): S.M. Hanchet, M.L. Stevenson (New Zealand), C. Jones (USA), P.M. Marriott, P.J. McMillan, R.L. O’Driscoll, D. Stevens, A.L. Stewart and B.A. Wood (New Zealand)
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Los pinguinos y el hombre (the penguins and the man)
Abstract: “The penguins and the man” is a video made with the three main goals, the first two are ... general, for the scientific communities and the third is an specific one, to introduce argentine people ... involved in work for CEMP. 1.- The first objective is to show basic biology of adelie penguins necesary to ... understand principles of CEMP standard methods. 2.- The second is to introduce philosophical principles of ...
Meeting Document : WG-CEMP-92/43 : Auteur(s): J.C.Ricca, M.A. Porretti and D.F. Vergani (Argentina)
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On the problem of icefish (Champsocephalus gunnari) vertical migration on the South Georgia shelf
Abstract: The results are presented of studying icefish vertical migration based on the data of R ... /V cruises during the seasons of 1982-83, 1983-84 and 1986-87, when this species was highly abundant ... on the South Georgia shelf. It is revealed that at day time the fish distributes near the bottom and ... the maximum catches were available at the middle of the light hours of the day. At twilight the fish ...
Meeting Document : WG-FSA-91/06 : Auteur(s): J.A. Frolkina and V.I. Shlibanov (USSR)
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A descriptive analysis of the toothfish (Dissostichus spp.) tagging programme in the Ross Sea up to 2005/06
Abstract: A descriptive analysis of the toothfish tagging programme carried out in Subareas 88.1 ... and 88.2 since 2001 is presented. The paper updates tag-release and tag-recapture data for fish that ... for non- New Zealand vessels for the first time. However, tag data were only available for all of ... . Tagging rates by area over the past three years have been in the same proportion as the catch by area ...
Meeting Document : WG-FSA-SAM-06/09 : Auteur(s): A. Dunn and S.M. Hanchet (New Zealand)
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Further investigations in the assessment of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–H for the years 2002–03 to 2012–13
Abstract: This paper presents further investigations of the Bayesian sex and age structured ... 88.2C, D, E, F, G, and H (SSRUs 88.2C–H). Annual age-length keys were applied, and the time trends in ... the tag-derived biomass index were investigated. The impact of hypothesised stock structure, fish ... movement, tag mixing and the potential for localised depletion on the stock assessment were also ...
Meeting Document : WG-SAM-14/29 : Auteur(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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Results of the Spanish exploratory longline fishery for Dissostichus spp. in Divisions 58.4.1 and 58.4.2 in the two previous seasons
Abstract: We addressed the revisions requested by the WG-SAM-14 regarding the results of the ... -SAM-14/09. A summary of the results of the Spanish research that took place in the 58.4.1 division ... during the last two fishing seasons is presented. A prospective estimation of the local biomass (B LOC ... ) of three SSRUs visited using the local depletion method, together with the extrapolation to the total ...
Meeting Document : WG-FSA-14/35 : Auteur(s): R. Sarralde, L.J. López-Abellán and S. Barreiro (Spain)
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Comparing surface and planimetric area across multiple scales and assessing the impact of different data sources on seabed area estimation in research blocks in the CAMLR Convention Area
important for CCAMLR in estimating the fishable biomass of these species in data-poor areas, developing ... surface) within the Convention area are commonly calculated, but surface area (i.e. a three-dimensional ... surface) is rarely estimated. The aims of this paper are to examine differences in: (1) planimetric seabed ... estimates for the same areas using the most up-to-date global bathymetry dataset (GEBCO 2014). Comparisons ...
Meeting Document : WG-SAM-15/01 : Auteur(s): CCAMLR Secretariat