Search results
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Shipboard line transect surveys of crabeater seal abundance in the pack-ice off East Antarctica: evaluation of assumptions
showed little movement in response to the approaching ship. Movement away from the ship by seals close ... movement in response to the approaching ship. Movement away from the ship by seals close to the ship’s ...
Meeting Document : WG-EMM-04/64 : Author(s): C. Southwell, W. de la Mare (Australia), D. Borchers and L. Burt (United Kingdom)
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Comparison of equal-area cylindrical and circular piston transducers
between cylindrical and circular piston transducers by comparing the performance of the two according ... loss. Under identical conditions of excitation, isotropic ambient noise, and detection threshold of 20 ... and circular piston transducers by comparing the performance of the two according to the principle ... loss. Under identical conditions of excitation, isotropic ambient noise, and detection threshold of 20 ...
Meeting Document : WG-EMM-95/08 : Author(s): Foote, K.G.
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
, normally between 1 and 4 animals and have a relatively lower impact on catches, depressing CPUE by up to 20 ... , normally between 1 and 4 animals and have a relatively lower impact on catches, depressing CPUE by up to 20 ... normally of 4 to 10 animals, and often appear to actively seek out fishing vessels and ‘strip’ the line ... %. Sperm whales have been more frequently encountered in recent years, occurring in larger pod sizes ...
Meeting Document : WG-FSA-10/P06 : Author(s): J. Moir Clark and D.J. Agnew
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Revised research plan for toothfish in Division 58.4.4 a & b by Shinsei maru No. 3 in 2013/14
not been able to determine catch limit yet, we would like to conduct research repeated for at least one ... not been able to determine catch limit yet, we would like to conduct research repeated for at least one ... estimated from CASAL base model (1040 tonnes) was about 2 times higher than those from the two methods ... more year in the same locations as in the 2012/13 season, with the same survey design and sample size ...
Meeting Document : WG-FSA-13/36 : Author(s): Delegation of Japan
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Classification of Southern Ocean krill and icefish echoes using Random Forests
, South Atlantic, one species in particular, mackerel icefish, Champsocephalus gunnari, forms pelagic ... Atlantic, one species in particular, mackerel icefish, Champsocephalus gunnari, forms pelagic aggregations ... at two or more echosounder frequencies. For commonly used frequencies, however, the differences for krill ... and analysis of differences in mean volume backscattering strengths (SV; dB re 1 m-1) measured at two or more ...
Meeting Document : WG-EMM-16/23 : Author(s): N. Fallon, S. Fielding and P. Fernandes
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Reports on stock status and biological information on toothfish obtained from the scientific research survey by Shinsei Maru No. 3 in 2009/10 in the SE sector of Division 58.4.3b
cm. Total of 60 individuals of toothfish were tagged and released during the survey. One male ... cm. Total of 60 individuals of toothfish were tagged and released during the survey. One male ... 11 % in weight to the total. Among two species of toothfish, Dissostichus mawsoni was dominant (82 ... 11 % in weight to the total. Among two species of toothfish, Dissostichus mawsoni was dominant (82 ...
Meeting Document : WG-FSA-10/45 : Author(s): K. Taki, M. Kiyota and T. Ichii (Japan)
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Preliminary reports on stock status and biological information on toothfish obtained from the scientific research survey by Shinsei Maru No. 3 in 2009/10 in the SE sector of Division 58.4.3b
cm. Total of 60 individuals of toothfish were tagged and released during the survey. One male ... cm. Total of 60 individuals of toothfish were tagged and released during the survey. One male ... 11 % in weight to the total. Among two species of toothfish, Dissostichus mawsoni was dominant (82 ... 11 % in weight to the total. Among two species of toothfish, Dissostichus mawsoni was dominant (82 ...
Meeting Document : WG-SAM-10/13 : Author(s): K. Taki, M. Kiyota and T. Ichii (Japan)
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A spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
Abstract: We present a spatially explicit age-structured population dynamics operating model ... restricted and unrestricted models (Mormede et al. 2013). The most plausible model is the one that restricts ... We present a spatially explicit age-structured population dynamics operating model for Antarctic ... is the one that restricts toothfish distribution to depths which are known to provide suitable toothfish ...
Meeting Document : WG-FSA-13/53 : Author(s): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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A potential link between the D. eleginoides stocks of Statistical Subareas 48.3 and 48.4
the two areas, but tag recapture data clearly show a small number of toothfish moving between them, while ... and 48.4 Microsoft Word File: sam-15-30.docx Approval: Approved Secretariat Workflow Status: Content ... . Different growth rates and maturity suggest that there is no regular exchange between the two areas, but tag ...
Meeting Document : WG-SAM-15/30 : Author(s): M. Soeffker, M. Belchier and V. Laptikhovsky (United Kingdom)
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Abundance and trends of Type B killer whales (Orcinus orca) around the western Antarctic Peninsula
-identification rate (61% photographed in more than one year) within a highly connected social network compared ... % photographed in more than one year) within a highly connected social network compared to B2s (25% re ... penguins. We integrated satellite telemetry to describe movement (B1: n = 8 tags, median duration = 20 ... area per year from a small parent population averaging 50 whales (75% Probability Interval 46-57 ...
Meeting Document : WG-EMM-18/16 : Author(s): H. Fearnbach, J.W. Durban, D.K. Ellifrit and R.L. Pitman