Search results
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Preliminary assessment of Champsocephalus gunnari on the Heard Island Plateau (Division 58.5.2) based on a survey in May 2002
was not significantly different from previous years but the one-sided lower 95% confidence bound was greater than ... estimates of length at age parameters would be for most of the fish to be three year olds. However, given ... the abundance of fish in the population and the age structure of fish last year, it would be more reasonable ... to conclude that most of the fish are four years old, as this age class comprised the larger fraction (93 ...
Meeting Document : WG-FSA-02/47 : Author(s): A.J. Constable, R. Williams and T. Lamb (Australia)
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Assessment of Patagonian toothfish (Dissostichus eleginoides) in Subarea 48.3
years. Projections indicate that a constant catch of 2,420 tonnes in the 2020 and 2021 seasons would ... status of the stock is at 50% of B0. Spawning biomass has been relatively constant in recent years ... . Projections indicate that a constant catch of 2,420 tonnes in the 2020 and 2021 seasons would ...
Meeting Document : WG-FSA-2019/28 : Author(s): T. Earl
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Diets of sympatrically breeding Adélie, gentoo and chinstrap penguins from Admiralty Bay, South Shetland Islands, Antarctica, 1981 to 2000
during chick rearing over the 20-year period from 1981 to 2000. All three penguin species were largely ... the 20-year period from 1981 to 2000. All three penguin species were largely dependent on Antarctic krill ... , specifically the benthic Nototheniid species, while Adélie and chinstrap penguins largely ate two species ... among the three species in the years of high versus low food loads. Adélie and chinstrap penguin adults ...
Meeting Document : WG-EMM-03/29 : Author(s): W.Z. Trivelpiece (USA), K. Salwicka (Poland) and S.G. Trivelpiece (USA)
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Estimating nest-level phenology and reproductive success of colonial seabirds using time-lapse cameras
attendance, where predominantly two adults are present before and during egg laying, but switch to one adult ... to one, and selecting the date when the first derivative of the spline is minimized. Clutch initiation ... to one adult during incubation. The switch approximates the date of clutch completion and is estimated ... adults to one, and selecting the date when the first derivative of the spline is minimized. Clutch ...
Meeting Document : WG-EMM-18/P01 : Author(s): J.T. Hinke, A. Barbosa, L.M. Emmerson, T. Hart, M.A Juáres, M. Korczak-Abshire, G. Milinevsky, M. Santos, P.N. Trathan, G.M. Watters and C. Southwell
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Research plan for toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in 2010/11
No. 3 to be conducted in April-June 2011. This is the second year of the survey of the 3-5 years consecutive research ... . The research hauls are allocated on 10-minute latitude x 20-minute longitude grid points, taking into account ... survey. We calculated the two values (78 and 114 tonnes) of total allowable sample size for the 2010/11 ... No. 3 to be conducted in April-June 2011. This is the second year of the survey of the 3-5 years consecutive research ...
Meeting Document : WG-SAM-10/15 : Author(s): Delegation of Japan
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The winter pack-ice zone provides a sheltered but food-poor habitat for larval Antarctic krill
below the ice (upper 20 m) and drift away from the ice areas where they have previously fed. Model ... below the ice (upper 20 m) and drift away from the ice areas where they have previously fed. Model ...
Meeting Document : WG-EMM-18/P04 : Author(s): B. Meyer, U. Freier, V. Grimm, J. Groeneveld, B.P.V. Hunt, S. Kerwath, R. King, C. Klaas, E. Pakhomov, K.M. Meiners, J. Melbourne-Thomas, E.J. Murphy, S.E. Thorpe, S. Stammerjohn, D. Wolf-Gladrow, L. Auerswald, A. Götz, L. Halbach, S. Jarman, S. Kawaguchi, T. Krumpen, G. Nehrke, R. Ricker, M. Sumner, M. Teschke, R. Trebilco and N.I. Yilmaz
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Mackerel icefish size and age at South Georgia and Shag Rocks
total lengths (TL) of age-classes were determined for each year by examining length frequency plots ... in the length-frequency distributions. Lengths of age-classes derived by these two methods were ... not statistically different. Age-class 1 was found for all surveys at South Georgia but was absent for 3 years ... mean TL of age-classes 1, 2 and 3 were, respectively, 14.5, 23.8 and 30.2 cm at South Georgia, and 18.6 ...
Meeting Document : WG-EMM-03/7 : Author(s): A.W. North (United Kingdom)
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Power analyses of CEMP indices for penguins at Admiralty Bay and fur seals at Cape Shirreff and Seal Island
in log-abundance of breeding penguins (one possible transformation of Index A3) will, apparently ... of ?, observation period, and level of change, but detecting trends in log-abundance of breeding penguins (one ... a period of 20 years may be feasible for most indices. Detecting trends in indices A8 and C2 may ... a period of 5 years. Nevertheless, detecting trends over a period of 20 years may be feasible for most ...
Meeting Document : WG-EMM-03/52 : Author(s): G.M. Watters, R.P. Hewitt, W.Z. Trivelpiece and M.E. Goebel (USA)
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Assessment models for Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–G for the years 2002–03 to 2010–11
Abstract: This paper describes the first Bayesian sex and age structured population stock ... for the age frequency structure of the north and south areas. Author(s): S. Mormede, A. Dunn and S.M ... This paper describes the first Bayesian sex and age structured population stock assessment model ... for the age frequency structure of the north and south areas. ...
Meeting Document : WG-FSA-11/43 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)
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Population, breeding, diet and conservation of Crozet shag Phalacrocorax [atriceps] melanogenis at Marion Island, 1994/95 to 2002/03
shags breed for the first time when aged three years. It is probable that about 25% of the mature ... shags breed for the first time when aged three years. It is probable that about 25% of the mature ... seasons, breeding pairs on average fledged 0.30 chicks from first clutches, an amount thought inadequate ... seasons, breeding pairs on average fledged 0.30 chicks from first clutches, an amount thought inadequate ...
Meeting Document : WG-EMM-03/17 : Author(s): R.J.M. Crawford, J. Cooper, B.M. Dyer, A.C. Wolfaardt, D. Tshingana, K. Spencer, S.L. Petersen, J.L. Nel, D.G. Keith, C.L. Holness, B. Hanise, M.D. Greyling and M. du Toit (South Africa)