Résultats de la recherche
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
fisheries of the patagonian toothfish Dissostichus eleginoides related with the selectivity of the type and ... size of hooks used in the longlines. Original data obtained during 1991 on the coast of Valdivia, South ... East Pacific, are added. The data show that the circle hooks are far more efficient that the right ones ... . The size frequency of the population collected with straight hooks No3 and 4 are not significatively ...
Meeting Document : WG-FSA-91/11 : Auteur(s): C.A. Moreno (Chile)
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
other model parameters in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI ... . An alternative strategy was adopted whereby the catch-at-age and mark-recapture data were restricted ... to the main trawl ground in which the longest time series of catches and the great majority of ... years 1998 to 2008. A large proportion of the recaptures of fish released in this fishery were aged and ...
Meeting Document : WG-FSA-10/41 : Auteur(s): S. Candy, D. Welsford, T. Lamb, J. Verdouw and J. Hutchins (Australia)
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Antarctic krill populations in the outflow region of the north-western Weddell Sea
Abstract: A meso-scale zooplankton and krill net sampling survey was carried out in the north ... March 2013. The aim of the survey was to study the zooplankton composition and krill abundance and ... distribution in the outflow region of the Weddell Sea. Due to severe pack-ice conditions, more than half of the ... survey area was covered by ice during the summer season. Antarctic krill densities were found to be ...
Meeting Document : WG-EMM-13/24 : Auteur(s): V. Siegel (European Union)
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Investigation of potential biases in the assessment of Antarctic toothfish in the Ross Sea fishery using outputs from a spatially explicit operating model
-recapture data, and rely on the assumption that tagged and untagged fish have constant probabilities of ... recapture regardless of the spatial distribution of releases or subsequent fishing effort for recaptures ... . Conceptually this assumption implies either that tagged and untagged fish mix equally in the population, or ... that fishing effort for recaptures is distributed in proportion to the underlying abundance. Neither of ...
Meeting Document : WG-SAM-13/36 : Auteur(s): S. Mormede and A. Dunn (New Zealand)
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Integrated stock assessment for the Heard Island and the McDonald Islands Patagonian toothfish (Dissostichus eleginoides) fishery (Division 58.5.2)
eleginoides) at the Heard and the McDonald Islands (Division 58.5.2) with data until the start of August 2013 ... . Compared to the last assessment in 2011, this assessment updated the growth model and compared the effects ... stock assessment estimates and projected catch limits that satisfy the CCAMLR decision rules. Re ... -defining the fishery structure was based on a method by Candy et al. (2013) that suggested a simplification ...
Meeting Document : WG-FSA-13/24 : Auteur(s): P. Ziegler, S. Candy and D. Welsford (Australia)
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2006–2013 fish distribution and biomass in the Kerguelen EEZ (CCAMLR DIVISION 58-5-1) for the bathymetric range 100–1 000 m
Abstract: Three fish biomass surveys have been recently undertaken in the northern part of the ... Kerguelen Plateau (POKER 1, 2006; POKER 2, 2010; POKER 3, 2013) with the chartered trawler FV “Austral ... ” repeating the same random and stratified sampling stations in the bathymetric range 100 – 1000 m. Data on ... the bathymetric and geographical fish distribution are available for 19 bottom-dwelling species (13 ...
Meeting Document : WG-FSA-14/07 : Auteur(s): G. Duhamel, M. Hautecœur and R. Sinegre (France)
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Proposal to continue participation in the second year of the joint CCAMLR research survey to collect spatially stratified longline and bathymetric data in 88.2_A and 88.2_B in 2015/16
Abstract: Toothfish in SSRUs 882.A–B are currently managed as part of the Ross Sea region stock ... , but the stock structure and fish movement patterns are uncertain and more information is required for ... the management across all of the region. Recognising this requirement, the Scientific Committee ... endorsed two years of spatially stratified longline surveys in the northern region of SSRUs 88.2A–B (SC ...
Meeting Document : WG-SAM-15/32 : Auteur(s): Delegation of the United Kingdom
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Conservation at CCAMLR: Understanding Article II of the Convention on the Conservation of Antarctic Marine Living Resources
Abstract: Article II has periodically been the subject of discussion in the Commission. As ... CCAMLR moves through its fourth decade of service as a vital part of the Antarctic Treaty system, the ... delegations of United States and Australia considered it was important to recall the development of the ... taking a close look at Article II of the Convention to see how the term is applied and to consider its ...
Meeting Document : CCAMLR-XXXV/BG/28 : Auteur(s): Delegations of Australia and the USA
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Proposal to continue the time series of research surveys to monitor abundance of Antarctic toothfish in the southern Ross Sea, 2018–2022
Abstract: This paper proposes to continue the Ross Sea shelf toothfish survey for the next five ... years, 2018–2022. The first objective of the survey is to monitor toothfish recruitment in the southern ... Ross Sea (core strata). This is a continuation of the yearly time series of research surveys of these ... strata carried out since 2012. It is important to continue the time series as the data collected provide ...
Meeting Document : WG-SAM-17/39 : Auteur(s): S.M. Hanchet, K. Large, S.J. Parker, S. Mormede and A. Dunn
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On the very high likelihood of bycatch of ice krill (Euphausia crystallorophias) in the present-day fishery for Antarctic krill (E. superba)
Abstract: During open discussions at the Third International Symposium on Krill (St Andrews ... , Scotland, June 2017) attended by representatives of the Association of Responsible Krill harvesting ... companies (ARK), the Marine Stewardship Council (MSC) and CCAMLR, it became apparent that no bycatch of Ice ... observer practice any such bycatch would be detected – this despite the fact that fishers are obligated as ...
Meeting Document : WG-EMM-18/05 : Auteur(s): A.S. Brierley and R. Proud