Resultados de la búsqueda
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Ross Sea Bioregionalisation, Part II: Patterns of co-occurrence of mesopredators in an intact polar ocean ecosystem
) and 3) diet. Species included were: Antarctic Minke Whale, Ross Sea Killer Whale (ecotype C ... both the shelf and the slope (Ross Sea Killer Whale, Weddell Seal); and 3) Marginal Ice Zone (MIZ; pack ... western and eastern portions of the shelf (where sea ice is persistent) are used as well (Minke whale ...
Meeting Document : WG-EMM-10/12 : Autor(es): G. Ballard, D. Jongsomjit and D.G. Ainley (USA)
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THE POWER OF ECOSYSTEM MONITORING
% power after 20 years with the probability of a type I error (α) = 0.05). The power increased to >50 ... monitoring programme of the predators of Antarctic krill Euphausia superba at South Georgia together with a ... power to detect the effects of different levels of fishing was examined. 3. The power to detect the ... % when α was increased to 0.2 when the ability to detect change was greater with the predator response ...
Meeting Document : WG-EMM-08/P11 : Autor(es): K. Reid, J.P. Croxall and E.J. Murphy
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The gentoo penguin as a candidate species for the CCAMLR Ecosystem Monitoring Program
Abstract: Based on dietary and other biological information collected over several years at Bird ... in winter), its residence in the ISR’s in winter and its early attainment of sexual maturity are all ...
Meeting Document : WG-CEMP-90/14 : Autor(es): J.P. Croxall and T.D. Williams (United Kingdom)
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Intra-annual variability in the abundance of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ krill density estimates
pattern in krill abundance was detected that recurred consistently over all 3 years. Krill densities in ... survey estimates with the observed pattern of within-year variability showed that some of the alleged ... (mean = 89.5 g m-2 SD 64.2). A simple polynomial regression model with time as the independent variable ... winter were predominantly low (mean = 18.7 g m-2 SD 24.3) but rose substantially by summer in each year ...
Meeting Document : WG-EMM-06/25 : Autor(es): R.A. Saunders, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein, D.G. Bone and A.S. Brierley (United Kingdom)
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Demography and population trends of the Atlantic yellow-nosed albatross
two study colonies on Gough Island and Tristan da Cunha for 20 years. Annual variation in the number ... immature and adult annual apparent survival averaged 88 ± 3% and 92 ± 1%, respectively, and apparent ... only 84 ± 2%. Annual survival of Tristan birds was negatively correlated with longline fishing effort ... Gough Island and 5.5% on Tristan da Cunha. Comparison with congeners suggests that the observed and ...
Meeting Document : WG-FSA-03/37 : Autor(es): R. Cuthbert (United Kingdom), P.G. Ryan, J. Cooper (South Africa) and G. Hilton (United Kingdom)
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Reassessment of important population parameters for Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on time series of surveys and fishery data
over 11 years on this stock with other surveys including part of this stock. This paper describes the ... originally thought with growth rates similar to South Georgia. The new estimates of growth parameters enabled ... -estimated in the past. An estimate of natural mortality indicates that mortality of young fish, ages 3-8 ...
Meeting Document : WG-FSA-01/73 : Autor(es): A.J. Constable, R. Williams, T. Lamb, I.R. Ball and E. van Wijk (Australia)
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Research plan for the exploratory fisheries for Dissostichus spp. in Division 58.4.1 in 2014/15
operation for at least 3 years with the same sample size as decided at the last CCAMLR meeting in the ... . The results of calculations were generally consistent with the current sample sizes. In addition, we ... meeting last year, since we have yet to obtain enough evidence to estimate plausible stock size, and ...
Meeting Document : WG-SAM-14/02 : Autor(es): Delegation of Japan
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Revised stock assessment of the Patagonian toothfish, Dissostichus eleginoides, in research block C of Division 58.4.4 (Ob & Lena Banks) using CASAL
, Shinsei maru No. 3, has conducted research fishing in accordance with a research plan submitted under CM ... 24-01. France notifies its wish to collaborate in this research fishery over the coming years in ... should be considered. The model has not been updated with 2014 data but six new sensitive runs have been ... tool this year. Author(s): A. Rélot-Stirnemann (France) Title: Revised stock assessment of the ...
Meeting Document : WG-FSA-14/06 : Autor(es): A. Rélot-Stirnemann (France)
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Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk sections for age determination
performed. First, longitudinal sections of the eyestalk from known age krill (2+ and 3+ years old) were ... examined and were determined to show distinct bands within the endocuticle consistent with their known age ... seasons. Marks consistent with annuli observed in laboratory raised krill were observed. Length at age ... ) and fall on the line for two and three year old krill. If validated, the technique should allow the ...
Meeting Document : WG-EMM-15/45 : Autor(es): C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia)
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Spatial and temporal distribution patterns of acoustic backscatter in the New Zealand sector of the Southern Ocean
transects collected between 2008 and 2014. Mean acoustic backscatter (s a) at 38 kHz varied between years ... could be related to MTLO abundance, trawl samples collected in 3 research voyages suggest that it may ... bulk backscatter must be interpreted with caution. Vertical distribution of backscatter showed clear ... , mesopelagic and deep mesopelagic), with seasonal differences in concentration and behaviour. Deep mesopelagic ...
Meeting Document : WG-EMM-18/P06 : Autor(es): P.C. Escobar-Flores, R.L. O’Driscoll and J.C. Montgomery