Search results
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region to 2018/19
releases for 2001–2018 and commercial fishery age frequencies for 1998–2018 are also included. Models ... . Tag releases for 2001–2018 and commercial fishery age frequencies for 1998–2018 are also ... Abstract: A Bayesian sex- and age-structured integrated stock assessment for Antarctic toothfish ... data for 1998–2019 and age and abundance data from the Ross Sea Shelf survey for 2012–2019. Tag ...
Meeting Document : WG-FSA-2019/08 : Author(s): A. Dunn
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Preliminary report of sound-speed contrast and density of krill measured on board RV Kaiyo Maru
properties: one is the ratio of the density of the animals to that of the surrounding water (density contrast ... , orientation, and material properties of krill are required. There are two important material properties: one ... of small animals like krill are difficult, the theoretical scattering models are used to predict ... , morphology, orientation, and material properties of krill are required. There are two important material ...
Meeting Document : WG-EMM-05/36 : Author(s): Y. Takao, H. Yasuma, R. Matsukura and M. Naganobu (Japan)
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Direct ageing of Antarctic krill (Euphausia superba) – potential utility of eyestalk sections for age determination
on the line for two and three year old krill. If validated, the technique should allow the development of age ... are performed. First, longitudinal sections of the eyestalk from known age krill (2+ and 3+ years old) were ... . Marks consistent with annuli observed in laboratory raised krill were observed. Length at age ... , longitudinal sections of the eyestalk from known age krill (2+ and 3+ years old) were examined and were ...
Meeting Document : WG-EMM-15/45 : Author(s): C. Reiss (USA), R. Kilada (Canada) and S. Kawaguchi (Australia)
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The state of exploited fish stocks in the Southern Ocean - a review
(mainly South Georgia) while the remaining one third originated primarily from the Kerguelen waters ... South Georgia) while the remaining one third originated primarily from the Kerguelen waters ... Union since more than 20 years. The total yield from the Southern Ocean has been 2.85 million tonnes ... until the season 1989/90. About two thirds of the catches have been taken in the Atlantic Ocean sector ...
Meeting Document : SC-CAMLR-X/BG/13 : Author(s): Delegation of Germany
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Zooplankton target strength: volumetric or areal dependence?
cylindrical radius). The theoretical models chosen for this comparison were two versions of a high-pass bent ... ). The theoretical models chosen for this comparison were two versions of a high-pass bent-cylinder model (Stanton ... and 1 MHz and the dependence of these data on animal volume versus cross-sectional area was explored The 420 ... 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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Distribution of krill (Euphausia superba Dana) catches in the South Shetlands and South Orkneys
to March was taken within 40 km of the coast, and 90% within 80 km in all years 1988-1990. In 1987 and 1988 ... within 40 km of the coast, and 90% within 80 km in all years 1988-1990. In 1987 and 1988 75% of the catch ... are used to show that for some years, at distances of between 20 and 60 km from predator colonies catches ... years, at distances of between 20 and 60 km from predator colonies catches in January and February may ...
Meeting Document : WG-KRILL-92/19 : Author(s): D.J. Agnew (Secretariat)
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Effects of orientation on acoustic scattering from Antarctic krill at 120 kHz
to move, and showed more or less random orientation. One thousand echoes were collected per animal ... , had substantial freedom to move, and showed more or less random orientation. One thousand echoes were ... Cruz, CA. Individual animals were suspended in front of the transducers, were only loosely constrained ... collected per animal. Orientation data were recorded on video. The acoustic data were analyzed and target ...
Meeting Document : WG-EMM-99/42 : Author(s): D.E. McGehee (USA), R.L. O’Driscoll (New Zealand) and L.V. Martin Traykovski (USA)
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Krill catches and consumption by land-based predators in relation to distance from colonies of penguins and seals in the South Shetlands and South Orkneys
was taken within 40 km of the coast, and 90% within 80 km in all years 1988-1990. In 1987 and 1988 75 ... of the coast, and 90% within 80 km in all years 1988-1990. In 1987 and 1988 75% of the catch in Subarea 48.2 ... Abstract: Zones of 20 km width are defined around selected colonies of penguins distributed ... % of the catch in Subarea 48.2 between December and March was taken within 80 km of colonies in the South Orkneys ...
Meeting Document : SC-CAMLR-X/BG/07 : Author(s): Secretariat
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Effects of recruitment variability and natural mortality on Generalised Yield Model projections and the CCAMLR Decision Rules for Antarctic krill
mortality" (M = 3, annual survival of 5%). CVs of either 0, 10%, 20%, or 30% were added to the observed ... the catch while maintaining spawning biomasses above 20% of unfished biomass in more than 90% of the trials ... mortality" (M = 3, annual survival of 5%). CVs of either 0, 10%, 20%, or 30% were added to the observed ... the catch while maintaining spawning biomasses above 20% of unfished biomass in more than 90% of the trials ...
Meeting Document : WG-EMM-12/26 : Author(s): D. Kinzey, G. Watters and C. Reiss (USA)
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Fishing and conservation in southern waters
. The former Soviet Union has been the most important fishing nation, taking 80-90 % of the entire catch. Up ... Soviet Union has been the most important fishing nation, taking 80-90 % of the entire catch. Up to 1992 ... and the Kerguelen Islands. After 15 years of exploitation, most fish stocks have been heavily depleted. The krill ... catch from the Southern Ocean has been 4.9 million tonnes to date. More than 90 % of this catch ...
Meeting Document : SC-CAMLR-XII/BG/11 : Author(s): Delegation of Germany