Résultats de la recherche
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DISCRIMINATION OF ENVIRONMENTAL VARIABLES THAT INFLUENCE THE CATCH PER UNIT EFFORT: THE CASE OF THE ANTARCTIC KRILL FISHERY
standardization process consisting of isolating all those exogenous factors from temporal variations in abundance ... from the CPUE time-series. These exogenous factors include those generated by modifications in fishery ... vessel efficiency, variations in fishing strategies, and environmental fluctuations. The selection of the ... the environmental effects vary on different temporal scales in autocorrelated and non-random manners ...
Meeting Document : WG-EMM-11/P3 : Auteur(s): J.C. Quiroz, R. Wiff, M.A. Barrientos and F. Contreras
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Seabird research at Cape Shirreff, Livingston Island, Antarctica, 2005/06
to assess trends in penguin population size, as well as inter-annual variation in reproductive ... previous season and is the third lowest population size in the 10 years of census data. The chinstrap ... penguin breeding population has been declining for the Past eight years and is at its lowest size in the ... 10 years of study. Gentoo penguin fledging Success was the highest recorded in all the years of study ...
Meeting Document : WG-EMM-06/P1 : Auteur(s): E.S.W. Leung, R.A. Orben and W.Z. Trivelpiece (USA)
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Beach debris survey Signy Island, South Orkney Islands, 2002/03
1994/95 (an increase of 38% and 7% since 2001/02 respectively). There was an increase in the number of ... continued the change in trend that began last season in what had otherwise been a declining trend since 1993 ... /94. Such a continued increase in the number of these packaging bands found indicates that the ban on ... their use aboard fishing vessels brought into force by CCAMLR in 1995/96 has yet to prove entirely ...
Meeting Document : SC-CAMLR-XXII/BG/12 : Auteur(s): Delegation of the United Kingdom
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Trends of Antarctic fur seal population at SSSI No. 32, Livingston Island, South Shetlands, Antarctica
Abstract: We update in this paper the previously reported model for the Antarctic fur seal ... developed at Cape Shirreff during 1998/99, but we could not census the San Telmo Islets. In this regard, we ... had to model the population at the latter site, in order to have a complete estimate of the population ... . From this, we estimated an overall increase of 17% in the total population, including in this figure a ...
Meeting Document : WG-EMM-99/16 : Auteur(s): R. Hucke-Gaete, D. Torres, A. Aguayo, J. Acevedo and V. Vallejos (Chile)
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Potentially commercial invertebrates on Ob Bank: Moroteuthis ingens (Oegopsida) and Paralomis aculeata (Anomura) (Division 58.4.4)
, they have not been fished nor any fishable aggregations of them detected to date in the CCAMLR ... Convention Area. The squid Moroteuthis ingens has been constantly present in bottom trawl catches on Ob Bank ... during aimed fishery for Lepidonotothen squamifrons. At maximum, the proportion of squid in the total ... catches exceeded half of the catch, reaching 1310 kg per hour of trawling. All the squid were in ...
Meeting Document : WG-FSA-96/15 : Auteur(s): Pshenichnov, L.K.
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Age determination of the Antarctic fishes Champsocephalus gunnari and Notothenia rossii from South Georgia
Abstract: Foremost in the elucidation of accurate population dynamics parameters in fish is a ... , including mortality, population age structure, and changes in individual growth. Most investigations have ... used annual rhythmic deposition in calcified tissues as time marks but, due ts the lack of distinct ... periodicity in Antarctic hydrographic conditions, age determination of Antarctic fish has proven to be ...
Meeting Document : SC-CAMLR-VI/BG/43 : Auteur(s): R. Radtke (USA)
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Development of methods for evaluating the management of benthic impacts from longline fishing using spatially explicit production models
Abstract: An important management objective for CCAMLR in the high seas region of the Antarctic ... , and interpret. In general, the results of the simulations suggested that management action of areal ... closures in the Ross Sea region are likely to result in an improved outcome over scenarios where there was ... changes in the distribution of future fishing may result in alternative impacts or how different ...
Meeting Document : WG-SAM-10/19 : Auteur(s): A. Dunn, S.J. Parker and S. Mormede (New Zealand)
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Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983–2010
closed this fishery in 1990. We report changes in size and abundance of the commercially exploited ... declined from 1983 to 1991, and an increase in mean size during 1983-84 is consistent with weak cohorts ... stability (1992-1994), a sharp increase in length and a continued decline in relative abundance indicated ... period showed no change in modal size or mean length of the fish. We relate these patterns to the fishery ...
Meeting Document : WG-FSA-12/P01 : Auteur(s): E.R. Marschoff, E.R. Barrera-Oro, N.S. Alescio and D.G. Ainley
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Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk sections for age determination
Abstract: We outline a method for the direct determination of age in Antarctic krill (Euphausia ... superba). Recent studies (Kilada et al. 2012), have shown that annular growth bands are present in the ... endocuticle layer of the eyestalks and gastric mill in decapod crustaceans. Here we report on a preliminary ... Antarctic Division and examined using the methods outlined in (Kilada et al. 2012). Two analyses are ...
Meeting Document : WG-EMM-15/45 : Auteur(s): C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia)
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Report on the CCAMLR Marine Debris monitoring program
common type of debris items found in beach surveys. The fishing items found were mostly from longline and ... trawl origins. Plastic packaging bands continue to be found in beach surveys, with an increase in open ... bands found at Bird Island. The amount of debris in albatross colonies at Bird Island varies; debris ... . The amount of fishing related items (fishing lines and hooks) found in wandering albatross colonies ...
Meeting Document : WG-FSA-15/15 : Auteur(s): CCAMLR Secretariat