Resultados de la búsqueda
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Development of the Southern Ocean Continuous Plankton Recorder survey
the 1925–1927 Discovery Expedition, and has been used successfully for 70 years to monitor plankton in ... the North Sea and North Atlantic Ocean. Sixty-five years later the CPR as a Type II version returned ... austral summers with 20, 31 and 26 tows, respectively. The 1999/2000 season included a unique, nearly ... simultaneous three-ship crossing of the Southern Ocean along 25° 30’E, 110°E and 157°E. Typical CPR tows show ...
Meeting Document : WS-BSO-07/P4 : Autor(es): Hosie, G., M. Fukuchi and S. Kawaguchi
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Entanglement of Antarctic fur seals (Arctocephalus gazella) in man-made debris at Bird Island, South Georgia, during the 2004 winter and 2004/05 breeding season
% compared to last year; the lowest number of entanglements recorded since 1989. As in previous years, most ... entanglements where the animal could be sexed, males made up the majority of both seasons. After the high ... , this is after an absence of 3 years from the winter records and 2 years from the summer. These findings ... 64% from last year. For the first time since records started in 1990, none of the injuries were ...
Meeting Document : SC-CAMLR-XXIV/BG/16 : Autor(es): Delegation of the United Kingdom
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THE ROSS SEA ANTARCTIC TOOTHFISH FISHERY: REVIEW OF THE 3-YEAR EXPERIMENT AND DEVELOPMENT OF MEDIUM-TERM RESEARCH OBJECTIVES AND AN OPERATIONAL FRAMEWORK FOR THE FISHERY
fishery over the next 5–7 years in relation to Article II of the Convention, and to develop an operational ... changes. Next we identify key operational and research objectives for the fishery over the next 5–7 years ... in relation to Article II of the Convention. As part of this process we identify uncertainties in our ... current knowledge which need to be addressed to fulfil the requirements of Article II. These include, for ...
Meeting Document : WG-FSA-08/50 : Autor(es): Delegation of New Zealand
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A preliminary assessment for mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2019 random stratified trawl survey
in the 2019/20 season and 406 t in the 2020/21 season, respectively, satisfied the CCAMLR decision ... , abundance and yield in Division 58.5.2 to the west of 79 o 20’ E using standard CCAMLR methods (CMIX and ...
Meeting Document : WG-FSA-2019/02 : Autor(es): D. Maschette, G. Nowara and D. Welsford
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Effects of recruitment variability and natural mortality on Generalised Yield Model projections and the CCAMLR Decision Rules for Antarctic krill
%, 20%, or 30% were added to the observed recruitment values. The CCAMLR "depletion" decision ... Peninsula were used as proxies for recruitment variability. Simulations were run for 21 years with either no ... below 20% of its unfished value, meeting the CCAMLR "depletion" decision rule for recruitment ... maintaining spawning biomasses above 20% of unfished biomass in more than 90% of the trials. As the values for ...
Meeting Document : WG-EMM-12/26 : Autor(es): D. Kinzey, G. Watters and C. Reiss (USA)
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Seasonal and interannual variability of krill, salp and other zooplankton populations in the northwest Antarctic Peninsula region: summer 2001 in relation to the Long-Term AMLR Data Set
past 20 years. This resulted from large concentrations of Calanoides acutus, Metridia gerlachei and ... Island region during 18-30 January 2001 (Survey A, 101 stations) and 12 February-12 March 2001 (Survey D ... 1993 and 1998 salp years were not encountered. Length frequency distribution of the dominant aggregate ... preceded years with enhanced salp population size while curtailed budding periods preceded years with ...
Meeting Document : WG-EMM-01/45 : Autor(es): V. Loeb (USA)
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Broadbandwidth sound scattering and absorption from krill (Meganyctiphanes norvegica), Mysids (Praunus flexuousus and Neomysis integer) and shrimp (Crangon crangon)
(Meganyctiphanes norvegica) over the acoustical bandwidth of 30 to 210 kHz and compared to similar scattering ... derived with the generic krill shape and scaled to animal length (L). This implies that crustacean target ... volume of the animal. Collectively, these results provide tools for improving the detection of krill and ...
Meeting Document : WG-EMM-04/40 : Autor(es): S.G. Conti, D.A. Demer (USA) and A.S. Brierley (United Kingdom)
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Near-shore acoustic surveys for Antarctic krill at South Georgia, January 2004
observations from the past 20 years. A low density was perhaps not unexpected in line with recent cyclical ... were collected in seastate 6 with winds up to 30 knots and swells of approximately 2.5 m at survey ... patterns in density but may have been exacerbated by the presence of a large iceberg (40 miles by 30 miles ...
Meeting Document : WG-EMM-04/35 : Autor(es): A.S. Brierley, P.N. Trathan, J. Poncet and A. Morton (United Kingdom)
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Possible effects of different levels of fishing on krill on predators - some initial modelling attempts
dynamics model incorporating recruitment fluctuations together with information on adult survival and ... , but computations based on this approach are deferred pending clarification of the Questions raised ...
Meeting Document : WG-KRILL-93/43 : Autor(es): D.S. Butterworth and R.B. Thomson (South Africa)
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ANALYSIS OF KRILL OBSERVER COVERAGE IN SUBAREA 48.3
one season, and have been present on board for about 30% of the fishing season. They have achieved a ... efficient sampling proportion, at least for 48.3, should be >50% of vessels sampled each season, 20% of ... strategies should be pursued for at least 4 years before the Scientific Committee will have sufficient data ...
Meeting Document : WG-EMM-09/25 : Autor(es): D.J. Agnew, P. Grove, T. Peatman, R. Burns and C. Edwards (United Kingdom)