Resultados de la búsqueda
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An exploratory analysis of skate speciation using DNA identification techniques
region, were sequenced in specimens of Antarctic skates from the Ross Sea (Pacific Ocean sector), the ... Abstract: Two regions of the mitochondrial DNA, part of the cytochrome b gene and the control ... Islands (Atlantic Ocean sector). Based on the DNA results, the species of Bathyraja referred to as B ... . eatonii in the Ross Sea appears to be a discrete sister species to B. eatonii from the Atlantic sector. In ...
Meeting Document : WG-FSA-04/27 : Autor(es): P.J. Smith and S.M. McVeagh (New Zealand)
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Species profile of mackerel icefish (Champsocephalus gunnari)
and became the target species of fisheries in many parts of the low-Antarctic from 1975 to 1990 ... ’s with annual catches of a few thousand tonnes in each of the two areas. Aspect of the biology and ... exploitation of the species have been summarized in Kock and Everson (2003) and Kock (2005). Additional ... . Exploitation has been limited to South Georgia and Heard and McDonald Islands since the second half of the 1990 ...
Meeting Document : WG-FSA-07/12 : Autor(es): K.-H. Kock (Germany) and I. Everson (UK)
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Fishing patterns of Japanese krill trawlers
, 30nm, and 60nm). Distribution of the operation units showed considerable variation in space and time ... expressing the status of krill in the fishing ground. Catch per fishing days maybe the reasonable index for ... expressing the status of krill in the fishing ground. Author(s): S. Kawaguchi, T. Kameda and Y. Takeuchi ... strategies, especially focusing on their movement in time and space. The operations were grouped into ...
Meeting Document : WG-EMM-02/28 Rev. 1 : Autor(es): S. Kawaguchi, T. Kameda and Y. Takeuchi (Japan)
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Standardisation of commercial CPUE
Abstract: This paper reports analysis of CPUE data on cod in the Barents Sea. The potential of ... vessel trawling operations take place at acceptable proximity in time and space. The methodological ... approach might be of interest for the longline fishery for tothfish as well as for the trawl fishery on ... krill. A model for standardisation of fishing power for individual vessels in a commercial fishing fleet ...
Meeting Document : WG-SAM-15/P01 : Autor(es): A. Salthaug and O.R. Godø
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Estimating penguin populations using image analysis of colour aerial photography
Abstract: Penguin populations are potentially sensitive indicators of change in the Antarctic and ... sub-Antarctic and are used extensively to monitor changes in the marine ecosystem. Aerial photographic ... colonies, for colonies in areas of complex terrain, or for colonies where ground access is difficult ... study colonies, highlighting various assumptions that contribute to differences in the population ...
Meeting Document : WG-EMM-02/34 Text : Autor(es): P.N. Trathan (United Kingdom)
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On commercial significance of krill aggregations
of acoustic investigation obtained in the Soviet trawler operation areas in Subareas 48.1-48.4 were ... and 2002 (2380 hauls). In the course of the recent twenty years, krill has been fished in the areas ... numbering 22000 hauls for the period of 1986-1990 and those from Ukrainian trawlers for the period of 2001 ... estimated at 24 g/m2 (Boyd, 2001). As is evident from comparison of above density values, the fleet and ...
Meeting Document : WG-EMM-03/31 : Autor(es): S.M. Kasatkina (Russia)
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UPDATE ON ITEMS OF INTEREST TO WG-IMAF
potential for use in the CCAMLR context. Author(s): N. Walker (New Zealand) Title: UPDATE ON ITEMS OF ... Economic Zone that are relevant to the work of WG-IMAF. These developments include refinement of the ... requirement of fishing practices to reduce seabird bycatch by surface longline vessels and the introduction of ... regulations to reduce seabird bycatch by bottom longline vessels. The bycatch of seabirds by fisheries within ...
Meeting Document : WG-FSA-08/47 : Autor(es): N. Walker (New Zealand)
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FURTHER DEVELOPMENTS OF A SIMULATION MODEL, ‘PATCH’, FOR EVALUATING MANAGEMENT STRATEGIES TO CONSERVE BENTHIC HABITATS (VULNERABLE MARINE ECOSYSTEMS) WHICH ARE POTENTIALLY VULNERABLE TO IMPACTS FROM BOTTOM FISHERIES
ecosystems’ in order to maintain the ecological structure and function of, particularly, deep sea benthic ... habitats. Noting the paucity of data on the ecology of these habitats, this paper further develops a ... requirement can be translated into a simple operational objective: Maintain the quality of habitats above the ... paper describes how the simulation model, Patch, has been updated according to the recommendations of WG ...
Meeting Document : WG-FSA-09/42 : Autor(es): A.J. Constable (Australia)
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Distributions and predator-prey interactions of macaroni penguins, Antarctic fur seals, and Antarctic krill near Bird Island, South Georgia
between the distributions of predators and their prey with respect to the abundance of krill in the water ... macaroni penguins were concentrating their foraging for krill in the vicinity of the shelf-break. Author(s ... Abstract: We studied the distributions, abundances and interactions of macaroni penguins Eudyptes ... transects radiating from the breeding colonies of the vertebrate predators. We examined the relationships ...
Meeting Document : WG-CEMP-93/12 : Autor(es): G.L. Hunt, Jr (USA), D. Heinemann (USA) and I. Everson (United Kingdom)
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A method for inferring movement rates of fish from mark–recapture data
release and the recapture. In addition, the intensity of fishing effort (i.e. sampling) by location and ... required for the probability of recapture in a location to match the relative probability of catching an ... Abstract: This paper presents methods to infer the rate of movement of fish that are marked ... , released, and subsequently captured. The information that is available is the location and date of the ...
Meeting Document : WG-FSA-05/66 : Autor(es): C. Wilcox (Australia)