Résultats de la recherche
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Influence of the quality and quantity of data from a multi-year tagging program on bias and precision of biomass estimates from an integrated stock assessment – update
estimates from an integrated tag-based assessment are influenced by various aspects of a multi-year tagging ... SSB0 and SSB status in the assessment year stabilized or were relatively small with a tag size-overlap ... : Influence of the quality and quantity of data from a multi-year tagging program on bias and precision of ... and the resulting data should not be used in stock assessments with only few years of data available ...
Meeting Document : WG-FSA-12/18 : Auteur(s): P.E. Ziegler (Australia)
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Indicators of krill flux at various spatial-temporal based on the data of multi-year research carried out in the Scotia Sea. Comments on krill fishery management
flow at various spatial-temporal scales in the Scotia Sea. According the discussion at WG-EMM-2018 ... . Shnar Title: Indicators of krill flux at various spatial-temporal based on the data of multi-year ...
Meeting Document : WG-EMM-2019/58 : Auteur(s): S. Kasatkina and V. Shnar
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Revised progress report for the fourth year of the research fishery for Dissostichus spp. in Subarea 48.6 being jointly undertaken by Japan and South Africa
Abstract: A multi-year research plan as outlined in CM 41-04 (2012, 2013, 2014) was initiated in ... Title: Revised progress report for the fourth year of the research fishery for Dissostichus spp. in ... first 3.5 years is reported. The emphasis of the progress report is on block 486_2, since more tag ...
Meeting Document : WG-FSA-16/56 : Auteur(s): S. Somhlaba, R. Leslie, K. Taki, T. Ichii and T. Namba
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Proposal to continue participation in the second year of the joint CCAMLR research survey to collect spatially stratified longline and bathymetric data in 88.2_A and 88.2_B in 2015/16
-CAMLR XXXII, paragraph 3.76 (iv-c)). A multi-year, multi-Member research program was therefore ... successful completion of the first part of the two year survey, this paper presents the details of the vessel ... that will conduct the second year of research and summarises the research plan, previously agreed at ... year of the joint CCAMLR research survey to collect spatially stratified longline and bathymetric data ...
Meeting Document : WG-SAM-15/41 : Auteur(s): Delegation of Norway
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Among-year variation in growth of Antarctic krill Euphausia superba based on length-frequency data
Southern Ocean over a span of 19 yr to document among-year variation in krill growth during the austral ... estimates of among-year variation in krill growth. We estimate very high among-year variation in growth ... (annual estimates for a 30 mm krill in the Elephant Island region ranged from 0.00 to0.17 mm d −1; mean ... = 0.073, among-year coefficient of variation ≈ 0.8). We correlated growth rate variation to estimates of ...
Meeting Document : WG-EMM-13/P01 : Auteur(s): A.O. Shelton, D. Kinzey, C. Reiss, S. Munch, G. Watters and M. Mangel (USA)
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Proposal to continue participation in the second year of the joint CCAMLR research survey to collect spatially stratified longline and bathymetric data in 88.2_A and 88.2_B in 2015/16
-CAMLR XXXII, paragraph 3.76 (iv-c)). A multi-year, multi-Member research program was therefore ... successful completion of the first part of the two year survey, this paper presents the details of the vessel ... that will conduct the second year of research during the 2015/16 season and summarises the research ... to continue participation in the second year of the joint CCAMLR research survey to collect spatially ...
Meeting Document : WG-SAM-15/32 : Auteur(s): Delegation of the United Kingdom
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Summary of a three year mark-recapture experiment to estimate population size of Antarctic toothfish (Dissostichus mawsoni) in Southern Area of Statistical Subarea 48.4
Abstract: A three-year tagging experiment was initiated by the UK in 2008/09 fishing season with ... decline in catch rates over the three year study, more so between 2010 and 2011. A total of 476 D. mawsoni ... : Summary of a three year mark-recapture experiment to estimate population size of Antarctic toothfish ... indicated that mean estimates of vulnerable biomass for D. mawsoni were similar across recapture years 2010 ...
Meeting Document : WG-FSA-11/31 Rev. 2 : Auteur(s): R.C. Wakeford, J. Roberts and R.E. Mitchell (United Kingdom)
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Concordance of inter-annual fluctuations in densities of krill around South Georgia and Elephant Islands: biological evidence of same-year teleconnections across the Scotia Sea
interestingly, the magnitudes of abundance and between-year gradients of change of abundance at each site were ... both SG and El. There was no apparent lag in changes in abundance at each site, and ranked between-year ... South Georgia and Elephant Islands: biological evidence of same-year teleconnections across the Scotia ... mirrored by those at the other location; for example, 1991 and 1994 were years of very low krill density at ...
Meeting Document : WS-AREA 48-98/11 : Auteur(s): A.S. Brierley (UK), D.A. Demer, R.P. Hewitt (USA) and J.L. Watkins (UK)
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Intra-annual variability in the abundance of Antarctic krill (Euphausia superba) at South Georgia, 2002–2005: within-year variation provides a new framework for interpreting previous ‘annual’ krill density estimates
winter were predominantly low (mean = 18.7 g m-2 SD 24.3) but rose substantially by summer in each year ... . within-year) could have led to the perceived between-year variation from previous summer surveys in the ... survey estimates with the observed pattern of within-year variability showed that some of the alleged ... ‘year-to-year’ variation could be attributed just to sampling at different dates of year. However, there ...
Meeting Document : WG-EMM-06/25 : Auteur(s): R.A. Saunders, J.L. Watkins, K. Reid, E.J. Murphy, P. Enderlein, D.G. Bone and A.S. Brierley (United Kingdom)
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An 8-year cycle in krill biomass density inferred from acoustic surveys conducted in the vicinity of the South Shetland Islands during the austral summers of 1991/1992 through 2001/2002
fit to the biomass density time series is dominated by an 8-year cycle and predicts an increase in ... ): R.P. Hewitt, D.A. Demer and J.H. Emery (USA) Title: An 8-year cycle in krill biomass density inferred ... years and indications that ice cover in the winter of 2002 is seasonally early and extensive. Author(s ...
Meeting Document : WG-EMM-03/6 : Auteur(s): R.P. Hewitt, D.A. Demer and J.H. Emery (USA)