Résultats de la recherche
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Oil, marine debris and fishing gear associated with seabirds at Bird Island, South Georgia 1995/96
Abstract: In the third year of standardised recording of oil, fishing gear and marine debris at ... (two squid jigs; six hooks swallowed and impaled (four in adults, two in chicks), the remainder being ... seabirds at South Georgia have returned to the levels recorded in 1993194, relatively few items having been ... reported in 1994195. The reduction in 1994195 probably related mainly to changes in the long-line fishing ...
Meeting Document : SC-CAMLR-XV/BG/04 : Auteur(s): Delegation of the United Kingdom
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Relative selectivity of four sampling methods using traps and trawls for male snow crabs (Chionoecetes opilio)
deployed during the day. and (4) bottom trawl deployed at night. Catches were characterized in terms of ... , were larger than those caught in the trawl; the size of crabs caught in the trawl at night was larger ... than those caught during the day; 2) large-clawed crabs predominated in the catches from traps whereas ... small-clawed animals predominated in the trawl catches; 3) soft-shell crabs were more common in trawl ...
Meeting Document : WS-CRAB-93/11 : Auteur(s): J.M. Hoenig and E.G. Dawe (USA)
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Part 1. Seabird assemblages during trawling operations
Abstract: Our knowledge of seabird assemblage composition and abundance at-sea is limited by the ... the stern rather than the bow of the vessel. The information was collected as part of the project ... "Finfish distribution and abundance in Subareas 48.1 and 48.2" developed by the Pontificia ... Universidad Católica de Valparaíso on board the fishing vessel Cabo de Hornos, between January 21 and February ...
Meeting Document : WG-FSA-16/20 : Auteur(s): J.A. Arata
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Density estimation of Antarctic krill (Euphausia superba) around South Shetland Island and Elephant Island (Subarea 48.1) using two frequencies with 38 and 120 kHz
Abstract: The density of Antarctic krill swarm inhabiting the Subarea 48.1, which includes the ... Elephant Island peripheries and the west and north of the South Shetland Island, was estimated using an ... in 2019. Krill were collected by the commercial midwater trawl fishing vessel. The data were ... ) each transects krill AT. The weighted krill density was estimated to be 4.27 g/m 2 (CV=43.42%) applying ...
Meeting Document : SG-ASAM-2019/03 Rev. 1 : Auteur(s): S. Choi, S. Chung, I. Han, W. Oh, D. An and K. Lee
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Seabird avoidance measures for small Alaskan longline vessels
Abstract: Given the lack of information on appropriate seabird avoidance measures for small ... Alaskan longline vessels, we determined the “2-m access window”, or the distance astern that longline ... (> 26 to 55 feet) using two gear types: snap-on gear and fixed gear. We also determined the ... guidelines. Vessel speed was found to be a primary determinant of both the distance astern that longline ...
Meeting Document : WG-FSA-05/36 : Auteur(s): E.F. Melvin and M. Wainstein (USA)
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On influence of acoustic survey methodology improvement on krill biomass estimation. (A comparison of results of acoustic surveys based on single-frequency and double-frequency algorithms)
krill surveys have taken place for the recent twenty years. It has been attempted to determine the ... influence of such improvements on krill biomass estimation. The letter seems to become useful in comparative ... analysis of krill biomass data from the results of different acoustic surveys. There have been presented ... the results of krill biomass comparative estimation by single-frequency and double-frequency ...
Meeting Document : WG-EMM-01/41 : Auteur(s): S.M. Kasatkina and A.P. Malyshko (Russia)
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CEMP INDICES: 2009 UPDATE
Abstract: The CCAMLR Ecosystem Monitoring Program (CEMP) uses indices derived from data on ... indicator species collected by standard methods in the three Integrated Study Regions of the Convention Area ... . Each year the Secretariat updates the standardised index values and provides a summary of trends and ... and 12 CEMP parameters in 2008/09. This continues a decreasing trend in the amounts of data being ...
Meeting Document : WG-EMM-09/05 : Auteur(s): Secretariat
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INGESTION OF FISHING GEAR AND ENTANGLEMENTS OF SEABIRDS: IMPLICATIONS FOR MONITORING AND MANAGEMENT
of a 16 year dataset collected at Bird Island indicated that the amount of gear found in association ... -headed albatross was from squid and not longline fisheries, and mistaken for natural prey rather than the ... was affected. The index of wandering albatross gear abundance showed two peaks, the most recent ... corresponding with a substantial increase in the number of multifilament snoods (gangions), suggesting that the ...
Meeting Document : WG-IMAF-09/10 : Auteur(s): R.A. Phillips, C. Ridley, N. Harrison (United Kindom), K. Reid (Secretariat), G.N. Tuck (Australia) and P.J.A. Pugh (United Kingdom)
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Oxygen and carbon stable isotopes in otoliths record spatial isolation of Patagonian toothfish (Dissostichus eleginoides)
Abstract: Strong contrasts in ambient isotope ratios and in diet suggest stable isotopes in the ... Patagonian toothfish (Dissostichus eleginoides) sampled off the Patagonian Shelf and South Georgia, on either ... distinguish South American-caught fish from those taken in the Antarctic. Values of δ18O and δ13C predicted ... capture area with 100% success, validating their use for distinguishing provenance and corroborating the ...
Meeting Document : WG-FSA-08/P03 : Auteur(s): J.R. Ashford and C.M. Jones
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Diving pattern and performance in nonbreeding gentoo penguins (Pygoscelis papua) during winter
organization during the foraging trip) in relation to diet in nonbreeding Gentoo Penguins (Pygoscelis papua ... diurnal with 98% of foraging trips completed during the same day. Foraging-trip frequency was 0.8/day ... , trip duration was 6-8 h, and birds spent 51-62% of the foraging trip diving. Dive depth and duration ... -3.5 min, respectively. Deep-dive duration exceeded the subsequent surface interval, but shallow dives ...
Meeting Document : WG-CEMP-92/37 : Auteur(s): T.D. Williams (United Kingdom), A. Kato (Japan), J.P. Croxall (United Kingdom), Y. Naito (Japan), D.R. Briggs, S. Rodwell and T.R. Barton (United Kingdom)