Search results
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ASSESSMENT MODELS FOR ANTARCTIC TOOTHFISH (DISSOSTICHUS MAWSONI) IN THE ROSS SEA FOR THE YEARS 1997–98 TO 2008–09
, estimate of initial biomass to that from the 2007 base case. Two sensitivity models were run; one updated ... , estimate of initial biomass to that from the 2007 base case. Two sensitivity models were run; one updated ... Abstract: We provide an update of the Bayesian sex and age structured population stock assessment ... –B), using revised catch, catch-at-age, and tag-recapture data for the 2008–2009 season. The reference model ...
Meeting Document : WG-FSA-09/40 Rev. 1 : Author(s): A. Dunn and S.M. Hanchet (New Zealand)
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Discussion on recent results from an integrated assessment of Antarctic krill (Euphausia superba) in Subarea 48.1
or increasing) in krill biomass have not been apparent over the past 30+ years. Differences in scaling ... over the past 30+ years. Differences in scaling of biomass estimates between the annual models ... but lower absolute biomasses than the two annual models. A monthly model estimated different changes ... . Together, results from the two annual models and the seasonal model suggest that inter-annual variations ...
Meeting Document : WG-EMM-14/35 : Author(s): G.M. Watters, C.S. Reiss and D. Kinzey (USA)
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Increasing abundance of Type A killer whales (Orcinus orca) in the coastal waters around the Antarctic Peninsula
that are phenotypically, genetically and culturally distinct and rarely sighted away from Antarctica. In contrast, less ... and culturally distinct and rarely sighted away from Antarctica. In contrast, less is known about the Type ... in other parts of the world. Sightings of Type A around the AP have been increasing in recent years ... telemetry (n = 10 tags) and photo-identifications (13 years, 15,828 photographs) collected between austral ...
Meeting Document : WG-EMM-17/49 : Author(s): H. Fearnbach, J.W. Durban, D.K. Ellifrit and R.L. Pitman
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RESEARCH PLAN FOR TOOTHFISH IN DIVISION 58.4.4a & b BY SHINSEI MARU NO. 3 IN 2009/10
one fishing line, will be used in order to standardize the CPUE of Trot line more accurately ... one fishing line, will be used in order to standardize the CPUE of Trot line more accurately ... . in Division 58.4.4 a & b, a total of 124 research hauls are allocated on 10-minute latitude x 20-minute ... the consistency of the data from the two serial survey seasons, 2008/09 and 2009/10, and lead the efficient ...
Meeting Document : WG-SAM-09/11 : Author(s): Delegation of Japan
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
large-scale oceanic strata: one in the southwest Atlantic located in the Scotia Sea, and the other ... strata: one in the southwest Atlantic located in the Scotia Sea, and the other to the north ... of krill which are used in models to estimate sustainable yield in Area 48. The survey design includes two ... . Full analysis of the results of the CCAMLR-2000 Survey will take several years and will result ... sustainable yield in Area 48. The survey design includes two large-scale oceanic strata: one in the southwest ... ; and that six hours per day would be required to sample two stations, one station would be sampled around ... ), considered to be one of the key species in the Antarctic marine food web, is prey to a wide variety ... probability of being sampled. However, one problem arising from a simple randomisation procedure ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Author(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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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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Conservation Measure Conservation Measure 41-11 (2017)
Period in Force: 2017- 2018 ... that this measure would be for one year and that data arising from these activities would be reviewed ... . The fishery shall be conducted by two (2) Australian, one (1) French, one (1) Japanese, one (1) Korean ... and one (1) Spanish flagged vessel using longlines only. 2. This fishery shall be subject ... scientific observers, one of whom shall be an observer appointed in accordance with the CCAMLR Scheme ...
Conservation Measure : 41-11 (2017)