Résultats de la recherche
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2014 random stratified trawl survey
Abstract: The annual Random Stratified Trawl Survey was undertaken in Division 58.5.2 in the ... standard CCAMLR methods. A pattern of multiple year classes being present simultaneously in the population ... , which was first detected in 2011, has persisted. The large cohort observed in recent surveys was still ... projected. These projections indicate that catches of 309t in the 2014/15 season and 275t in the 2015/16 ...
Meeting Document : WG-FSA-14/44 : Auteur(s): D.C. Welsford (Australia)
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Quantifying the impacts of ice on demersal longlining; a case study in CCAMLR Subarea 88.1
Abstract: The effect of sea ice is acknowledged as a major influence on fishing operations in ... high latitudes but not widely understood in detail other than by fishers and specialists in Antarctic ... fisheries research and management. Using the toothfish fishery in CCAMLR Subarea 88.1 as a case study we ... provide a method to quantify the effect of sea-ice on fishing. We discuss the ways in which ice effects ...
Meeting Document : WG-FSA-14/55 Rev. 1 : Auteur(s): J.M. Fenaughty and S.J. Parker (New Zealand)
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Research plan for the 2015/16 exploratory longline fishery of Dissostichus spp. in Division 58.4.3a
began in 2013 in data-poor fisheries. In the present report, catch, effort and biological data recorded ... by all effective vessels were analyzed for the improvement of stock assessment in the research blocks ... . Based on the result, the next three-season (2016-18) research plan in Division 58.4.3a is also presented ... spp. population(s) in data- poor exploratory fisheries. During the second three-season research, we ...
Meeting Document : WG-SAM-15/03 : Auteur(s): Delegation of Japan
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2015-16 Research plan in Division 58.4.4 for Dissostichus spp.
fishing, CCAMLR decided to close the fishery in 2002 in division 58.4.4. Since 2008 only one vessel ... , Shinsei maru No. 3, had conducted research fishing in accordance with a research plan submitted under CM ... 24-01. In 2014, WG-FSA agreed research fishing conducted in the research blocks C and D by two ... account the remarks made during the WG-FSA 2014. In SSRU 58.4.4D, tag recaptures are insufficient (the ...
Meeting Document : WG-SAM-15/52 : Auteur(s): Delegation of France
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An ecological risk assessment of current conservation measures for krill fishing in East Antarctica (CCAMLR Divisions 58.4.1 and 58.4.2)
Abstract: Australia is adapting the risk assessment framework used in Area 48 to assess the risks ... involved in any redevelopment of a commercial krill (Euphausia superba) fishery in CCAMLR Divisions 58.4.1 ... has a high likelihood of achieving CCAMLR’s objectives in this region. This paper outlines a ... disproportionately concentrating catches in areas that are also important to krill predators. In particular, this ...
Meeting Document : WG-EMM-18/37 : Auteur(s): N. Kelly, L. Emmerson, S. Kawaguchi, C. Southwell and D. Welsford
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An exploration of the biological data used in the CCAMLR Subarea 48.3 Patagonian toothfish stock assessments
Abstract: WG-FSA 2018 noted that changes in productivity parameters may impact assessment ... change. The Working Group recommended that key assessment parameters be reviewed and that changes in the ... fishery dynamics that would impact their estimation be explored. The biological productivity parameters in ... subarea 48.3 are analysed here, particularly whether the proportion of females in the catch, maturity at ...
Meeting Document : WG-SAM-2019/32 : Auteur(s): E. MacLeod, K. Bradley, T. Earl, M. Söffker and C. Darby
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Stable isotope analysis reveals trophic variation in adult Antarctic krill (Euphausia superba) around the Antarctic Peninsula from austral fall to early winter
Abstract: The Antarctic krill (Euphausia superba) is a key species in the Southern Ocean ... ecosystem and an important link in the food web of the Antarctic ecosystem. The trophic information for this ... known overwintering mechanisms. However, the few studies on the topic differ in their results, in terms ... variation in δ 13 C and δ 15 N values of adult krill in the Antarctic Peninsula, in the austral fall (April ...
Meeting Document : WG-EMM-2019/P03 : Auteur(s): H.T. Zhang, G.P. Zhu, Q. Song, S.Q. Wang, Y. Yang and Q.Y. Yang
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Preliminary trials to test mitigation measures aimed at reducing Macrourus spp. by-catch on autoliners targeting D. eleginoides with longlines in the CCAMLR Convention Area
Abstract: Pilot studies were carried out in 48.3 in 2006 and in 88.1 and 88.2 in 2007 by the ... in catch rates of Macrourus spp due to bait was significant, but not for hook-type. Bait type had ... , variation in CPUE for target and non-target species due to geographical location, depth and soak time were ... significant. In order for the benefits of mackerel bait in reducing macrourid (and other species) bycatch to ...
Meeting Document : WG-FSA-07/33 : Auteur(s): R.E. Mitchell, D.J. Agnew, T. Carruthers, J. Clark, L. Ross (United Kingdom) and J. van Heerden (South Africa)
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Results of the mark–recapture experiment in Subarea 48.3, 2005
Abstract: The mark-recapture experiment continued at South Georgia in 2005. In total some 8000 ... fish have now been tagged in 48.3, and both tagging effort, fishing effort and recaptures were well ... – distributed over the whole of the fishable grounds in 48.3 this year. The Petersen mark-recapture estimator ... , which has been applied previously and described in detail by Agnew et al (2004) and Payne et al (2005 ...
Meeting Document : WG-FSA-05/17 : Auteur(s): D.J. Agnew and A. Payne (United Kingdom)
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Preliminary analysis on the Kerguelen shelf icefish Champsocephalus gunnari stock from 1996/97 to 2001/02: no evidence in the recovery!
deverted fishermen from these specific shallow fishing grounds. However to follow the situation in the area ... cruises in the traditionnal area of fish aggregations. Such cruises occur regularly with two trawlers from ... 1996/97 to 2001/2002, the last season of trawling in the Kerguelen EZ. Preliminary results do not show ... an increasing of the icefish’s abundance in the surveyed area and biomass seems very low. It is a ...
Meeting Document : WG-FSA-02/65 : Auteur(s): G. Duhamel and J. Claudet (France)