Search results
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Population dynamics of wandering albatross Diomedea exulans and Amsterdam albatross D. amsterdamensis in the Indian Ocean and their relationships with longline fisheries: conservation implications
1986 have shown slow recovery. The population of the endangered Amsterdam albatross Diomedea ... study of the Crozet population indicates that the earlier decline was mainly the result of increased ... adult mortality, and secondarily of low recruitment. Satellite tracking studies of breeding birds and ... band recoveries of non breeding birds indicate that during and outside the breeding season these ...
Meeting Document : WG-FSA-96/09 : Author(s): Jouventin, P., Brothers, N., Weimerskirch, H.
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A comparison of model predictions from KPFM1 and KPFM2
Abstract: We compare two versions of the krill-predator-fishery model to demonstrate the extent ... to which the predictions of KPFM1 can be reproduced with KPFM2. We also discuss the incorporation of ... seasonality into parameter estimates and a necessary change in the predator recruitment function of KPFM2 ... logic of KPFM2 have not caused substantial changes in model results. In essence, KPFM1 has become a ...
Meeting Document : WG-EMM-06/20 : Author(s): J. Hinke, G. Watters (USA), S. Hill and K. Reid (United Kingdom)
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Acoustic estimates of krill density at South Georgia during 11 austral summers between 1981 and 1998
Abstract: Acoustic estimates of densities of Antarctic krill, Euphausia superba, at South Georgia ... and 1994 austral summer seasons were characterised by particularly low abundances of krill. For five ... of the summers between 1990 and 1998 it was possible to calculate separate density estimates for ... north-eastern and north-western ends of South Georgia. In four of these years density was higher to the ...
Meeting Document : WG-EMM-98/51 : Author(s): A.S. Brierley, J.L. Watkins, C. Goss, M.T. Wilkinson and I. Everson (UK)
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A simple approach for calculating the potential yield of krill from biomass survey results
calculations is that the probability that the kri11 spawning biomass drops below 20% of its average pre ... -exploitation level over a 20 year period of harvesting should not exceed l0%. The value of λ depends strongly ... on the value of M (natural mortality) and σR (recruitment variability), and also on the relative ... values of the ages at maturity and first-capture. Seasonal effects seem to be of lesser importance ...
Meeting Document : WG-KRILL-91/24 : Author(s): D.S. Butterworth (South Africa) and M. Basson (United Kingdom)
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Committee for Environmental Protection: 2017 Annual Report to the Scientific Committee of CCAMLR
Abstract: Cooperation between the Scientific Committee of CCAMLR (SC-CAMLR) and the Committee for ... Environmental Protection (CEP) has been steadily increasing over the last few years to the mutual benefit of ... between the Chairs of the CEP and SC- CAMLR, the report of the CEP meeting is presented to SC-CAMLR by the ... CEP Observer to SC-CAMLR and the report of the meeting of SC-CAMLR is presented to the CEP by the SC ...
Meeting Document : SC-CAMLR-XXXVI/BG/08 : Author(s): CEP Observer to SC-CAMLR (Dr P. Penhale, USA)
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Committee for Environmental Protection: 2019 Annual Report to the Scientific Committee of CCAMLR
Abstract: Cooperation between the Scientific Committee of CCAMLR (SC-CAMLR) and the Committee for ... Environmental Protection (CEP) has been steadily increasing over the last few years to the mutual benefit of ... between the Chairs of the CEP and SC-CAMLR, the report of the CEP meeting is presented to SC-CAMLR by the ... CEP Observer to SC-CAMLR and the report of the meeting of SC-CAMLR is presented to the CEP by the SC ...
Meeting Document : SC-CAMLR-38/BG/07 : Author(s): CEP Observer to SC-CAMLR, Dr P. Penhale (USA)
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An updated descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2004/05
Abstract: An updated descriptive analysis of the toothfish tagging programme carried out in ... . A total of 4903 Antarctic toothfish have been released and 89 recaptured, and 443 Patagonian ... toothfish released and 9 recaptured. For the last two years, when tagging has been part of the Conservation ... Measure, New Zealand vessels have tagged between 1.0 and 2.77 toothfish per tonne of catch. Tagging rates ...
Meeting Document : WG-FSA-05/34 : Author(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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Density and abundance estimates of baleen whales recorded during the 2019 DY098 cruise in the Scotia Sea around South Georgia and the South Sandwich Islands
on the abundance of krill and so was not optimised for deriving design-based cetacean abundance ... estimates, but may provide a useful means of comparing whale densities and habitat use patterns between the ... species during the survey (226 sightings of a total count of 495 whales) and were widely distributed east ... of 42.5°W in all water depths surveyed, with fin whales the next most commonly sighted species (53 ...
Meeting Document : WG-EMM-2019/27 : Author(s): M. Baines, M. Reichelt, C. Lacey, S. Pinder, S. Fielding, N. Kelly, E. Murphy, P. Trathan and J.A. Jackson
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Long-term change in zooplankton communities of the Southern Ocean between 1997 and 2018: implications for fisheries and ecosystems
Abstract: We provide an analysis of zooplankton distributions in the circumpolar Southern Ocean ... productivity, sea-surface temperature (SST), mixed layer depth, sea ice and the spatial gradient of SST (as an ... indicator of ocean fronts). Boosted Regression Tree models were used to investigate relationships between ... the abundances of key groups of zooplankton, occurrence of characteristic zooplankton communities, and ...
Meeting Document : WG-EMM-2019/66 : Author(s): M.H. Pinkerton, M. Decima, J. Kitchener, K. Takahashi, K. Robinson, R. Stewart and G.W. Hosie
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CCAMLR observer manual questionnaires: summary results of preliminary analysis during its introductory period
Abstract: Preliminary analysis of data from the questionnaires of krill fishery behavior in ... CCAMLR observer manual was undertaken. The analysis revealed possible inconsistency in definitions of the ... event codes among different skippers. Some suggestions were made to improve the quality of questionnaire ... format to better understand the nature of the fishery. Author(s): S. Kawaguchi and S. Nicol (Australia ...
Meeting Document : WG-EMM-05/31 : Author(s): S. Kawaguchi and S. Nicol (Australia)