Resultados de la búsqueda
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Selectivity-induced bias in growth parameter estimates
Abstract: A short simulation study has been carried out to investigate the size of the bias in ... producing considerably lower estimates of L? and higher estimates of K than in the true population. The ... being included in catch samples. Fish were included in catch samples from the population with ... selectivity function used in the simulations closely matched those used for current toothfish assessments in ...
Meeting Document : WG-FSA-SAM-05/19 : Autor(es): G.P. Kirkwood (United Kingdom)
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Krill catch distribution in relation to predator colonies 1987 to 1992
Abstract: The distribution of krill catches in relation to land-based predator colonies ... , calculated from CCAMLR fine-scale data, is shown for Subareas 48.1 and 48.2. The pattern of catches in 1992 ... previous years. It is estimated that the catch in the critical period-distance was equal to 12% and 15% of ... the total exploitation of krill in these two subareas respectively. Author(s): Secretariat Title ...
Meeting Document : WG-KRILL-93/10 : Autor(es): Secretariat
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Towards a new method for age determination in Antarctic krill, and evidence that krill shrink under natural conditions
-length and the crystalline cone number of the compound eye was examined. Samples collected in the late ... body-length offers a method for detecting the effect of shrinking in natural populations of krill. On ... maintained in conditions of low food availability. Recent studies have also demonstrated that E. superba ... individuals may be shrinking in the field during winter. If krill shrink during the winter, conclusions ...
Meeting Document : WG-Krill-94/17 : Autor(es): W. de la Mare (Australia)
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Fish stock assessment survey in Subarea 48.3, 2004
Abstract: This report describes the activities and preliminary results of the 9th UK fish stock ... British Antarctic Survey scientists during January and February 2004. In addition to the random stratified ... bottom trawl survey the research was extended by a week in order that further investigations into the use ... of acoustic methods for the determination of icefish biomass could be undertaken. Following the ...
Meeting Document : WG-FSA-04/85 : Autor(es): M. Belchier, M. Purves, M. Collins, S. Hawkins, T. Marlow, R. Mitchell, J. Szlakowski and J. Xavier (United Kingdom)
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Evaluating MPA scenarios in Planning Domain 1 using a dynamic food-web model
. Author(s): Delegation of the USA Title: Evaluating MPA scenarios in Planning Domain 1 using a dynamic ... Abstract: We describe a spatially and temporally dynamic food-web model of the region surrounding ... the Western Antarctic Peninsula that can be used to evaluate the potential impacts of various marine ... protected area (MPA) scenarios. We evaluate four MPA scenarios, including two representing portions of the ...
Meeting Document : SC-CAMLR-XXXVII/BG/04 : Autor(es): Delegation of the USA
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Soviet krill fishery in 1977–1992, Part 1. Distribution, fishing effort, interannual situation patterns
: FE was developed mostly in subarea 48.2, since 1985 the role of 48.3 is increasing. Type III: 1987 ... maximally developed for the moment. The phenomena occur in subareas 48.1 and 48.2 under increase of the ... Abstract: The data on Soviet krill fishery in i977-1992 are presented. The fishing effort (FE ... ) developed in 1977-1991 was 50086 fishing days in total. According to the pictures presented FE was ...
Meeting Document : WG-EMM-01/57 : Autor(es): F.F. Litvinov, V.A. Sushin, G.A. Chernega and O.A. Berezhinskiy (Russia)
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Krill CPUE standardisation and comparison with acoustic data based on data collected from Chinese fishing vessels in Subarea 48.1
indicate the changing trends of the density of krill in the water close to sea surface, which may be ... Abstract: The usability of CPUE data as Antarctic krill abundance index was a widely discussed ... by Chinese fishing vessel Furonghai in 2015/16 season. The result showed that the CPUE data could be ... than catch per day data. The veridical distribution and movement of krill could be important source of ...
Meeting Document : WG-EMM-17/41 : Autor(es): Y. Ying, X. Wang, J. Zhu and X. Zhao
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Filling knowledge gaps east in Dronning Maud Land to inform MPA planning by CCAMLR (ECOgaps): Norwegian cruise to DML 2019
east of the 0 meridian in the MPA planning Domain 4. Focusing on the Astrid ridge, the continental ... Abstract: The aim of the ECOgaps is to improve the knowledgebase on physical conditions and biota ... shelf off of Dronning Maud Land, and the Maud rise, multidisciplinary investigations will be conducted ... in 2019 by the RV Kronprins Haakon. In this working document, the cruise being planned is outlined ...
Meeting Document : WG-EMM-18/13 : Autor(es): H. Steen, A. Lowther and O.A. Bergstad
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Interactions between cetaceans and fisheries in Southern Ocean
Southern Ocean in the second half of the 1980’s, interactions of cetaceans with these fisheries became ... . Sperm whales became frequently entangled in the line and part of the line was lost in a number of cases ... . Other cetaceans were rarely seen in the vicinity of longline vessels. They became entangled in the line ... Abstract: Soon after longlining on Patagonian toothfish (Dissostichus eleginoides) started in the ...
Meeting Document : WG-FSA-05/11 : Autor(es): K.-H. Kock (Germany), M. Purves (South Africa) and G. Duhamel (France)
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Seabird by-catch and bait loss in longlining using different setting methods
scarer, but not by using the setting funnel. No increase in the catches of target species was ... minor problem in this fishing experiment. Suggestions on how to improve the efficiency of the two ... scaring device. Bait loss and the catches of target species and sea birds were compared with those of ... effectively by the sea-bird scarer. Losses of mackerel bait were also significantly reduced by using the ...
Meeting Document : WG-FSA-96/06 : Autor(es): Løkkeborg, S.