Resultados de la búsqueda
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Stock assessment of the Patagonian toothfish (Dissostichus eleginoides) at South Georgia
Abstract: Recently a longline fishery has developed for the Patagonian Toothfish, Dissostichus ... conventional methods because the bulk of the adult population may be dispersed over a wide area in deep water ... whereas the Shag Rocks’ shelf may be a nursery ground for juveniles. An assessment of the stock has been ...
Meeting Document : WG-FSA-91/20 : Autor(es): I. Everson (United Kingdom)
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Modelling and Decision Making as Part of the CCAMLR Management Regime
Abstract: This paper outlines a stylised scheme designed to address the multi-objective decision ... horizons, time steps, constraints and data) were identified in an attempt to provide a blueprint for the ... formulation of a suitable decision-making protocol for management purposes. Author(s): D.G.M. Miller (South ...
Meeting Document : WG-CSD-88/10 : Autor(es): D.G.M. Miller (South Africa)
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An analysis of within-season recaptures of tagged toothfish
Abstract: In response to a request from WG-SAM, the secretariat inspected the available data on ... within-season recaptures varied spatially and a particular ‘hot-spot’ was found over a northern, and ...
Meeting Document : WG-FSA-13/01 : Autor(es): Secretariat
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Revised South African work plan for 2014/15 for the joint Japan/South Africa research on Dissostichus spp. in Subarea 48.6
Abstract: A multi-year plan for research by Japan and South Africa aimed at yielding a tag-based ... 41-04. This paper submits a work plan for the South African contribution to the third year of this ...
Meeting Document : WG-SAM-14/11 : Autor(es): Delegation of South Africa
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An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL
been resolved. The results presented here indicate a general downward bias in the expected recaptures ... showing that the mark-recapture observations indicates a smaller stock size than the other datasets. This ... is consistent with the problems discussed of the potential bias of a single-area model in trying to ... cover a highly spatially structured stock. It is recommended that the mark-recapture data not be ...
Meeting Document : WG-FSA-06/64 : Autor(es): A. Constable, S. Candy, T. Lamb and I. Ball (Australia)
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Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48
Abstract: CCAMLR Conservation Measure 32/X sets a 1.5 million metric ton precautionary catch ... . Therefore, we consider the following tradeoff to be important: choosing a biologically explicit alternative ... and delaying implementation, or choosing a biologically unrealistic alternative and implementing a ... catches to set limits can be categorized as having a low potential for delaying implementation, but they ...
Meeting Document : WG-EMM-01/29 : Autor(es): G. Watters and R. Hewitt (USA)
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Beach debris survey Signy Island, South Orkney Islands 1999/2000
size categories. A total of 55 items weighing 10.78kg was collected. The number of items was 35% less ... follows a declining trend since 1996/97. The proportion of polypropylene packaging bands removed was also ... at Signy Island has been showing a declining trend since 1993/94. This is promising. The longevity of ... plastics and other materials with a high resistence to degradation in the marine environment remains a ...
Meeting Document : SC-CAMLR-XIX/BG/06 : Autor(es): Delegation of the United Kingdom
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Catch rates and length composition data of the longline fishery for Dissostichus eleginoides at the Prince Edward Islands: 1996/97
eleginoides made in the vicinity of the Prince Edward Islands, a South African territory in the Indian Ocean ... interest in the fishery leading to a great influx of vessels to the area. By the end of 1996 up to 40 ... around 0.7 kg per hook at the end of 1996 a steady decline in CPUE to less than 0.4 kg per hook towards ... Georgia longline fisheries. A decrease in fish sizes was also noted since the inception of the fishery ...
Meeting Document : SC-CAMLR-XVI/BG/28 : Autor(es): Delegation of South Africa
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Pilot study on electrophoretic variation and stock structure in the mackerel icefish, Champsocephalus gunnari, South Georgia waters
Abstract: The use of allozymes as a tool in stock structure analysis was examined in the ... commercially-exploited mackerel icefish, Champsocephalus gunnari, together with a preliminary assessment of ... of icefish samples (N = 18 to 42 per sample) indicated stock separation on a local scale. Genetic ... index, FIS) detected at most loci which were due mainly to heterozygote deficiencies. There was a ...
Meeting Document : WG-FSA-90/10 : Autor(es): G.R. Carvalho and D.P. Lloyd-Evans (United Kingdom)
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Infectious diseases of Antarctic penguins: current status and future threats
Antarctica. From previous reports we know that penguin species are highly susceptible to a number of ... increase over the last 50 years. However, issues of data not being published and a lack of formal risk ... System, means that our understanding is still patchy. A feather loss condition of unknown etiology ... requires urgent further investigation. Also of concern, is that a number of mass mortality events have ...
Meeting Document : WG-EMM-14/53 : Autor(es): W.W. Grimaldi, P.J. Seddon, P.O.B. Lyver, S. Nakagawa and D.M. Tompkins (New Zealand)