Resultados de la búsqueda
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Extending the time series of catch-weighted length frequencies
use of CCAMLR data for D. eleginoides in Subarea 48.3 collected in the seasons 1992/93 and from 1994 ... from 1993/94 because of a mismatch in Flag State which presently occurs between the length and catch ... extended the existing time series of catch-weighted length frequencies for D. eleginoides in Subarea 48.3 ... an overlap of seasons. However there is a systematic difference in the overall number of fish ...
Meeting Document : WG-FSA-SAM-06/04 : Autor(es): David Ramm & Lydia Millar
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Spatial distribution and swarm characteristics of Antarctic krill around the South Shetland Islands
majority of swarms were also found in the upper 100 m layer. The swarm-based method provides a promising ... as swarms in a patchy fashion and the mean krill densities in December 2013 and February 2018 were ... Abstract: The spatial distribution and swarm characteristics of Antarctic krill were studied ... using the swarm-based method established in SG-ASAM-17. Acoustic data were collected from the FV Fu Rong ...
Meeting Document : WG-EMM-18/42 : Autor(es): X. Yu, X. Wang and X. Zhao
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Acquiring a ‘base datum of normality’ for a marine ecosystem: the Ross Sea, Antarctica
researchers who currently investigate open-ocean systems. Herein, the importance of top-down forcing in ... current functioning of the RSShelfE. In spite of this unique evidence for the Antarctic region, much ... pelagic and neritic marine ecosystems is reviewed with concrete evidence given for its existence in the ... remains to be learned about cross-component interactions in the Ross Sea system. Should the RSShelfE be un ...
Meeting Document : WG-EMM-04/20 : Autor(es): D. Ainley (USA)
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Entanglement of Antarctic fur seals (Arctocephalus gazella) by man made debris at Bird Island, South Georgia, during the 2005 winter and 2005/06 breeding season
reported here. Two entanglements were observed in the winter, a decrease of 60% from the previous year, and ... the lowest number seen since records began in 1990. One of these involved a male pup entangled in ... individual involved. In contrast there was double the number of observed entanglements during summer of 2005 ... made up the majority during the summer, in contrast to previous years. The majority (63%) of summer ...
Meeting Document : SC-CAMLR-XXV/BG/13 : Autor(es): Delegation of the United Kingdom
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Sea ice characterisation of the proposed Ross Sea region Marine Protected Area Special Research Zone
achieving the objectives of the proposed SRZ in the future. Based on historic satellite-derived sea ice ... in about half of the fishing seasons. Over the past 16 seasons, the SRZ was accessible to fishing in ... still removed from the area in constraining ice years (2010 and 2013). The main influence of sea ice on ... ice within and surrounding the boundaries of the proposed SRZ over the past 16 years, the impact it ...
Meeting Document : SC-CAMLR-XXXIV/BG/31 : Autor(es): S. Parker, S. Hoyle, S. Hanchet and R.J.C. Currey (New Zealand)
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Fish as diet of the blue-eyed shag, Phalacrocorax atriceps bransfieldensis at Half-Moon Island, South Shetland Islands
Shetland Islands, during January and February 1993, were analyzed to determine the importance of fish in ... means of otoliths found in the casts. The size and weight of the fish were estimated from the otolith ... by number (37.9%), whereas N. coriiceps prevailed in mass (35.8%). With the exception of G ... at Duthoit Point, Nelson Island. However, the relative importance of the fish species in the diet ...
Meeting Document : WG-CEMP-94/32 : Autor(es): E.R. Barrera-Oro and R.J. Casaux (Argentina)
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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 ... used annual rhythmic deposition in calcified tissues as time marks but, due ts the lack of distinct ... difficult. It is now possible to determine the age of fish through the utilization of daily increments in ... 55 cm in 7 years. The lack of: the large size groups for Notothenia rossii may be indicative of over ...
Meeting Document : SC-CAMLR-VI/BG/43 : Autor(es): R. Radtke (USA)
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Slow recovery of previously depleted demersal fish at the South Shetland Islands, 1983–2010
period showed no change in modal size or mean length of the fish. We relate these patterns to the fishery ... closed this fishery in 1990. We report changes in size and abundance of the commercially exploited ... low recruitment. The length-frequency distribution of unexploited N. coriiceps throughout the whole ... declined from 1983 to 1991, and an increase in mean size during 1983-84 is consistent with weak cohorts ...
Meeting Document : WG-FSA-12/P01 : Autor(es): E.R. Marschoff, E.R. Barrera-Oro, N.S. Alescio and D.G. Ainley
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Preliminary results of a feeding trial on the blue-eyed shag Phalacrocorax atriceps
the casts and came from the fish stomachs. Therefore, their importance in the diet of the blue-eyed ... bransfieldensis during 45 days of the austral summer at Jubany Station, King George Island, South Shetland Islands ... . The otoliths identified in pellets were affected by the digestive process and consequently the fish ... gibberifrons and Nototheniops nudifrons all the species were underestimated in number (N. rossii fully). G ...
Meeting Document : WG-CEMP-94/29 : Autor(es): R. Casaux, M. Favero, E. Barrera-Oro and P. Silva (Argentina)
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Examination of the CCAMLR toothfish GLM
nationalities, coupled with the existence of the experimental fishery in 1994, lead us to suggest that future ... a discussion of the recent declines in CPUE seen in Subarea 48.3. Author(s): G.P. Kirkwood and D.J ... Abstract: Various elements of the Generalized Linear Model (GLM) used to standardise toothfish ... CPUE in Subarea 48.3 are investigated. Problems with crossover between the essentially summer fishery ...
Meeting Document : WG-FSA-98/35 : Autor(es): G.P. Kirkwood and D.J. Agnew (United Kingdom)