Résultats de la recherche
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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)
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Variation in reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implications for southern ocean monitoring studies
Abstract: Aspects of the reproductive performance of Black-browed, Grey-headed and Wandering ... Georgia over the last decade (and similar data for Adelie and Chinstrap Penguins at Signy Island, South ... Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... significantly. The other species at South Georgia, which breed in summer and for which krill forms a significant ...
Meeting Document : SC-CAMLR-VI/BG/15 : Auteur(s): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)
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Variation or reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implication for Southern Ocean monitoring studies
Abstract: Aspects of the reproductive performance of Black-browed, Grey-headed and Wandering ... Georgia over the last decade (and similar data for Adelie and Chinstrap Penguins at Signy Island, South ... Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... / significantly. The other species at South Georgia, which breed in summer and for which krill forms a significant ...
Meeting Document : WG-CEMP-87/13 : Auteur(s): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)
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Target strength of Antarctic krill
=-69db). Net samples obtained immediately before the experiment indicate that the animals were ... target strength based on extrapolations of other field experiments using the bent cylinder model of sound ... scattering by elongated zooplankters. The modal value of the measurements is 6.7dB lower than that predicted ... by the BIOMASS equation for 47.44mm krill. Author(s): R.P. Hewitt and D.A. Demer (USA) Title ...
Meeting Document : WG-KRILL-91/13 : Auteur(s): R.P. Hewitt and D.A. Demer (USA)
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CCAMLR observer program training video
the training of CCAMLR observers and for use by observers as a reference tool while at sea. The video ... covers many of the practical sections identified by CCAMLR as essential elements to be included in the ... observer training course. Currently the video is in English and only covers toothfish observing on ... autoliners and the aim to be to build on this with contributions from other Members. Author(s): J. Moir ...
Meeting Document : TASO-10/07 : Auteur(s): J. Moir Clark and R. Benedet (UK)
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Groupe de travail sur les méthodes d'évaluation acoustique et d'analyse (WG-ASAM)
SG-ASAM was established by the Scientific Committee as an expert group to examine issues relating ... to hydroacoustic surveys of Antarctic krill. Each of the meetings of the sub-group have had specific ... terms of reference from the Scientific Committee as a result of a specific issue where expert evaluation ... -38, paragraph 2.36 and CCAMLR-38, paragraph 5.6). The current Co-conveners are Dr Sophie Fielding ...
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