Résultats de la recherche
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Geographical differences in the condition, reproductive development, sex ratio, and length distribution of Antarctic toothfish (Dissostichus mawsoni) from the Ross Sea, Antarctica (CCAMLR Statistical Subarea 88.1)
part of the Ross Sea showed that this component of the population had a unimodal length distribution at ... Abstract: A number of morphological and reproductive measurements made seasonally on Antarctic ... seasons aboard the autoliner San Aotea II have been analysed. Results of this study indicate measurable ... differences in a number of indices from toothfish found on the Ross shelf proper, as distinct from those ...
Meeting Document : WG-FSA-05/52 : Auteur(s): J.M. Fenaughty (New Zealand)
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Marine Protected Areas in the Southern Ocean: update on current status of designated areas
Abstract: The development of a representative system of Antarctic marine protected areas (MPAs ... ) will require up to date information on the location, conservation aims and current status of protected ... areas designated within the Convention Area. As at August 2011, there is one designated MPA managed by ... (ASMAs) with both marine and terrestrial components (all located south of 60°S). A further 3 MPAs have so ...
Meeting Document : WS-MPA-11/19 : Auteur(s): S.M. Grant and P.N. Trathan (UK)
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Unhappy feet: the reduction of Adélie and chinstrap penguin populations in the West Antarctic Peninsula/Scotia Sea
reduction of the populations of Adélie (Pygoscelis adeliae) and chinstrap penguins (Pygoscelis antarctica ... chinstrap penguin populations have declined more than 50% during the last 30 years at study colonies in the ... . Trivelpiece et al. argue that the reduction of the populations of both species could be attributed to changes ... in the abundance of their main prey, Antarctic krill, which is affected by climate change. In this ...
Meeting Document : CCAMLR-XXX/BG/21 : Auteur(s): Submitted by ASOC
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Latitudinal variation of demersal fish assemblages in the western Ross Sea
February and March 2004 and 2008 in the Ross Sea, and around seamounts and islands just to the north at 66 ... °S. The distribution and abundance of 65 species collected in these surveys were examined to ... influence this. Species accumulation with sample frequency did not reach an asymptote, but the rate of new ... species was low suggesting data were adequate for describing the main components of the communities. Three ...
Meeting Document : WG-FSA-10/P03 : Auteur(s): M.R. Clark, M.R. Dunn, P.J. McMillan, M.H. Pinkerton, A. Stewart and S.M. Hanchet
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Measures to avoid bias in abundance estimates of Dissostichus spp. based on tag-recapture data
Abstract: Using the simplest form of an abundance estimator using tag-recapture data, the Lincoln ... against this bias, or to account for their effects in assessment models. In nearly all cases, examples of ... at sea or model-based approaches are available from established toothfish tagging programs to reduce ... these biases. Estimates of post-capture mortality, tag detection rates and where it occurs, post-release ...
Meeting Document : WG-SAM-12/23 : Auteur(s): D.C. Welsford and P.E. Ziegler (Australia)
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Progress report of the CEMP Special Fund overwinter penguin tracking project
Abstract: We provide a brief update on the progress of our project “Tracking the overwinter ... habitat use of krill-dependent predators from Subarea 48.1”. The project was initiated with support from ... the CEMP Special Fund in 2015/16. With the assistance of the Secretariat, we purchased 150 ARGOS-based ... satellite transmitters and successfully deployed 130 instruments during the 2016/17 breeding season at sites ...
Meeting Document : WG-EMM-17/07 : Auteur(s): J. Hinke, G. Watters, M. Santos, M. Korczak-Abshire, G. Milinevsky and V. Lytvynov
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Ideal survey patterns: an example of using a simulated world
Abstract: This paper considers a class of survey patterns for a toothfish long lining fishery ... criteria. The shot selection criteria can be either that locations of known good quality are preferentially ... selected or that locations are selected at random. The landscape and fishery are simulated in a spatially ... explicit Monte Carlo model and the use of such models to study these issues is considered along with their ...
Meeting Document : WG-FSA-01/75 : Auteur(s): I.R. Ball and A.J. Constable (Australia)
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TOWARDS THE BALANCED STOCK ASSESSMENT OF ANTARCTIC TOOTHFISH IN THE ROSS SEA
of features aiming at consistent assessment using real (that is usually noisy and containing outliers ... Abstract: Last two years two different approaches were used for stock assessment of Antarctic ... toothfish in the Ross Sea. One of them, the CASAL model, (Dunn & Hanchet, 2007; Bull et al., 2007) is ... mostly based on likelihoods and potentially could insure proper mutual weighting of signals from all ...
Meeting Document : WG-SAM-08/08 : Auteur(s): D. Vasilyev and K. Shust (Russia)
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Report of vulnerable marine ecosystems in South Georgia Islands (CCAMLR Subarea 48.3) through research dredge sampling
Abstract: In this contribution we report the presence of 6 vulnerable marine ecosystems (VME ... Institute of Fishery Research and Development (INIDEP) and the Argentine Antarctic Institute (IAA) during ... April-May of 2013. VMEs were established from the finding of high densities of indicator taxa through a ... the biomass and were primarily responsible of reaching the proposed threshold of 10kg/1200 m 2 but ...
Meeting Document : WG-FSA-13/58 : Auteur(s): E. Gaitán, L. Schejter, D. Giberto, M. Escolar and C. Bremec (Argentina)
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Method of age determination for Antarctic toothfish (Dissostichus mawsoni)
. All in all 6009 specimens of toothfish were aged using the same above described method. Otoliths were ... collected by Russian observers aboard longline vessels at the Ross Sea during 2002-2007 seasons. We consider ... , A.F. Petrov and V.A. Bizikov (Russia) Title: Method of age determination for Antarctic toothfish ...
Meeting Document : WG-SAM-12/18 : Auteur(s): E.N. Kyznetsova, A.F. Petrov and V.A. Bizikov (Russia)