Search results
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IMPROVING ESTIMATES OF ADÉLIE PENGUIN BREEDING POPULATION SIZE: DEVELOPING FACTORS TO ADJUST ONE-OFF POPULATION COUNTS FOR AVAILABILITY BIAS
times within a breeding season to minimise bias in estimates of the breeding population has long been ... Abstract: It is widely recognised that the interpretation of counts of penguin populations at ... recognised, the considerable work in obtaining one-off counts for population surveys have not been matched by ... the collection of adjustment data. This was recognised at the recent Predator Survey workshop, where ...
Meeting Document : WG-EMM-09/38 : Author(s): C. Southwell, J. McKinlay, L. Emmerson, R. Trebilco and K. Newbery (Australia)
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Zooplankton target strength: volumetric or areal dependence?
the scattering characteristics of zooplankton. In addition, because scattering from individual ... MHz and the dependence of these data on animal volume versus cross-sectional area was explored The 420 ... seawater. The data were compared to both empirical and theoretical models of reduced target strength (TS ... normalized by the square of the animal length) versus ka (the product of wave number and equivalent ...
Meeting Document : WG-Krill-94/13 : Author(s): D.A. Demer and L.V. Martin (USA)
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Characterising catch and effort from data-poor toothfish fisheries in CCAMLR Divisions 58.4.3 – 58.4.4
Bank) accumulated the highest proportion of allocated effort in which a total of 948 sets (52\%) were ... not been completed in most of the recent fishing seasons. Soaking time showed high variability and no ... to fishing logbooks recorded in the exploratory fisheries carried out between July 2000 and March ... 2012. During this period, a total of 9 countries registered fishing operations in which 1811 sets were ...
Meeting Document : WG-SAM-13/41 : Author(s): J.C. Quiroz, R. Wiff (Chile) and P. Martinez (Argentina)
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Marine debris and entanglements at Bird Island and King Edward Point, South Georgia, Signy Island, South Orkneys and Goudier Island, Antarctic Peninsula 2016/17
the long-term mean at both Bird Island and Goudier Island but below the mean at Signy Island. The incidence ... of marine mammal entanglements was below the long-term mean at all sites surveyed. Debris associated ... with seabird colonies was above the mean level for wandering albatrosses and grey-headed albatrosses, but below ... the mean for black-browed albatrosses and giant petrels. Author(s): C. Waluda Title: Marine debris ...
Meeting Document : SC-CAMLR-XXXVI/BG/35 : Author(s): C. Waluda
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Sampling toothfish from longlines with unequal probabilities
. Since toothfish are often aggregated on a line, this means that fish within aggregations are sampled ... are often aggregated on a line, this means that fish within aggregations are sampled with less catch effort ...
Meeting Document : WG-FSA-03/85 : Author(s): J.R. Ashford (USA)
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Draft Krill Fishery Report
summary of information related to the krill fishery in a similar format to the fishery reports that are ... in content to a finfish Fishery Report. The following compilation of information on the krill fishery ... includes a report on krill fishing in the current season and a list of notifications for next season ... completed for finfish fisheries in WG-FSA (www.ccamlr.org/node/75667). The Secretariat agreed to coordinate ...
Meeting Document : WG-EMM-14/58 : Author(s): Secretariat
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Proposal for an acoustic krill biomass survey in CCAMLR Division 58.4.2
krill in CCAMLR Division 58.4.2 (the South West Indian Ocean Sector) in January-March 2006. The survey ... limit can be established by CCAMLR. The planned survey will utilise a standardised design as adopted in ... previous B0 surveys in the CCAMLR Area and will use a similar methodology for collecting an analysing the ... consist of 15 parallel transects between 30° and 80°E. The survey design is presented to WG-EMM for their ...
Meeting Document : WG-EMM-04/37 : Author(s): S. Nicol, S. Kawaguchi, T. Jarvis and T. Pauly (Australia)
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Potential VMEs around Elephant and the South Shetland Islands (Subarea 48.1)
in the South Shetland Islands area. High biomass densities of VME indicator taxa, meeting the 10 kg ... new ‘diversity threshold’ is proposed in order to protect those VME taxa that do not occur in the ... Appendix II listed Antipatharia (black coral), which in the authors’ experience has never occurred at a ... the new diversity threshold, a total of 10 VME areas are proposed, half of which encompass multiple ...
Meeting Document : WG-EMM-12/51 : Author(s): S.J. Lockhart (USA), N. Wilson (Australia) and E. Lazo-Wasem (USA)
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Relative abundance of large whales around South Georgia
mother-calf pair was observed off the Shag Rocks in February 1997. Extirpation of animals from this ... Abstract: To assess large whale stocks following the cessation of land-based South Georgia ... particular feeding ground is the most likely reason for ongoing low numbers of all species. Other factors may ... humans, an unusually high rate of natural mortality, habitat change such as alteration in sea ice ...
Meeting Document : WG-EMM-99/34 : Author(s): M.J. Moore (USA), S.D. Berrow (UK), B.A. Jensen (USA), P. Carr (UK), R. Sears (Canada) and V.J. Rowntree, R. Payne and P.K. Hamilton (USA)
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Krill stock evaluation with data from commercial fishing vessels
‘Saga Sea’ in 2011 as example. A one-month subset of the acoustic data from February/March was processed ... . The use of such vessels as platforms for survey transects under scientific supervision has already ... board during normal fishing operations in a relatively easy and cheap manner using the Norwegian vessel ... within a time-frame of a week and linked to krill length data from the same period. The data from the ...
Meeting Document : WG-EMM-12/63 : Author(s): G. Skaret (Norway), J. Moir Clark (United Kingdom), O.R. Godø, R.J. Korneliussen, T. Knutsen, B.A. Krafft and S.A. Iversen