Search results
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CCAMLR tagging program: tag link status update
returned; 50% provide an exact match with tag numbers held in the database, 22 % provide an exact match ... with tag numbers but had inconsistent ancillary data. For those tags that did not provide exact or ... exact match with inconsistent ancillary data; and less than 2% could not be successfully linked. An ...
Meeting Document : WG-SAM-12/22 : Author(s): Secretariat
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Outline proposal for geographic information services for CCAMLR
managed by WG-EMM. It also proposes joint working with the Secretariat to enable capacity building in ... Secretariat. BAS is well-placed to offer these geographic information services, with over 10 years of ... includes indicative costs but can be followed up with a more detailed, fully-costed proposal. Author(s ...
Meeting Document : WG-EMM-12/70 : Author(s): Submitted by the Secretariat on behalf of Adrian Fox, British Antarctic Survey (United Kingdom)
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Estimates of local biomass, including estimates of uncertainty, for Antarctic (Dissostichus mawsoni) and Patagonian (Dissostichus eleginoides) toothfish in research blocks in Subareas 48.2, 48.6, 58.4 and 88.3
Abstract: This paper includes updated local biomass estimates of toothfish populations with ... at WG-SAM-16 with revisions to the CPUE-by-seabed area parameter values agreed at WG-SAM-17. The ... higher CPUE-by-seabed area estimates has also resulted in a greater overlap in confidence intervals with ...
Meeting Document : WG-FSA-17/42 : Author(s): CCAMLR Secretariat
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Comparing two and three frequency dB window identification techniques for estimating Antarctic krill density
model. A Bland-Altman analysis with a pre-set nominal cut-off of ≤5 gm-2 bias between methods identified ... that only the 120-70 kHz (S v120-70) identification window was comparable with the regularly used 120 ... ) identification window was comparable with the regularly used 120-38 and 200-120 kHz (S v120-38 & S v200-120 ...
Meeting Document : SG-ASAM-18/01 : Author(s): S. Fielding
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CCAMLR Satellite Overwatch Report (Decision of the Thirty-seventh Meeting of the Commission, paragraph 3.8)
geographical position which were provided to the CCAMLR Secretariat for comparison with CCAMLR VMS data. The ... Secretariat was provided with 44 operable images, which corresponded with two CCAMLR authorised vessels. Part ...
Meeting Document : CCAMLR-38/BG/06 : Author(s): Delegation of France and CCAMLR Secretariat
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Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: Investigating the roles of ocean and sea ice transport
in the Southern Ocean. Krill have a close association with sea ice which provides access to a ... . Here we present Lagrangian modelling studies at the circumpolar scale that include interaction with sea ... Modelling (OCCAM) project model together with satellite-derived sea ice motion vectors to examine the ... interaction with sea ice is important in determining the large-scale distribution of krill and its associated ...
Meeting Document : WG-EMM-07/P10 : Author(s): S.E. Thorpe, E.J. Murphy and J.L. Watkins (United Kingdom)
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Effects of variability in prey abundance on reproduction and foraging in chinstrap penguins (Pygoscelis antarctica)
contend with large interannual fluctuations in prey availability and hence the cost of chick provisioning ... . Adults faced with this uncertainty can mechanistically balance parental care by adopting a strategy ... , 1991 and 1992, respectively) and was correlated with annual measures of breeding adult body weight and ... in response to decreases in prey abundance in a manner consistent with predictions of life-history ...
Meeting Document : WG-EMM-06/P6 : Author(s): D.A. Croll, D.A. Demer, R.P. Hewitt, J.K. Jansen, M.E. Goebel and B.R. Tershy (USA)
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Zooplankton target strength: volumetric or areal dependence?
kHz and I MHz data were collected with a dual-beam sonar system and the 200 kHz data with a split-beam ... system. Experiments were conducted with live, tethered individuals in an enclosure filled with filtered ...
Meeting Document : WG-Krill-94/13 : Author(s): D.A. Demer and L.V. Martin (USA)
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Unusual breeding by seabirds at Marion Island during 1997/98
species with an intermediate foraging range that eat mainly crustaceans, macaroni Eudyptes chrysolophus ... chicks of rockhopper penguins fledged with a slightly heavier mass than in other years. However, for both ... /99) breeding season. The unusual breeding by most of the seabirds coincided with the El Niño Southern ... Oscillation (ENSO) event of 1997/98. This synchrony contrasts with lagged responses to ENSO events of seabirds ...
Meeting Document : WG-EMM-03/13 : Author(s): R.J.M. Crawford, C.M. Duncombe Rae, D.C. Nel and J. Cooper (South Africa)
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INCORPORATING SAMPLING VARIATION AND RANDOM READER ERROR INTO CALCULATION OF EFFECTIVE SAMPLE SIZE IN THE APPLICATION OF AGE LENGTH KEYS TO ESTIMATION OF CATCH-AT-AGE PROPORTIONS
accounts for both the variation associated with sub-sampling of the random length frequency (LF) sample for ... Monte Carlo multinomial replicates of the observed age length key (ALK) with each ALK used to generate a ... % to 10%. When random ageing error was combined with sampling error the corresponding values were lower ... , with a corresponding range of around 4 down to 1. This reduction is due to the way the ageing error ...
Meeting Document : WG-SAM-09/08 : Author(s): S.G. Candy (Australia)