Résultats de la recherche
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A preliminary assessment and revised growth model of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2017 random stratified trawl survey
Abstract: The annual random stratified trawl survey was undertaken in Division 58.5.2 in the ... , abundance and yield in Division 58.5.2 to the west of 79 o 20’ E using standard CCAMLR methods (CMIX and ... growth model based on recent cohort progressions indicated an increase in size-at-age compared to the ... parameters resulted in only a small impact on yield. Catches of 526 t in the 2017/18 season and 395 t in the ...
Meeting Document : WG-FSA-17/22 : Auteur(s): D. Maschette, P. Burch, P. Yates and D. Welsford
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Update on the conservation status, distribution and priorities for albatrosses and petrels in the CCAMLR area
distribution in the CCAMLR area are still uncertain or showed declines during the last two decades, and two ... incidental mortality in longline and trawl fisheries. CCAMLR has achieved outstanding success in reducing ... seabird bycatch in the area under its jurisdiction to negligible levels. However, the species distributed ... in the Convention Area are highly migratory and largely extend their distribution in neighbouring ...
Meeting Document : SC-CAMLR-XXXVII/BG/10 : Auteur(s): Submitted by the ACAP Secretariat
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Revised research program of Ukraine in Subarea 88.3
Abstract: The research of Dissostichus in Subarea 88.3 carried out by Chile in 1998, New Zealand ... in 2005, Russia in 2011 and 2012 and the Republic of Korea in 2016. It was noted that no tagged ... January to April, as ice conditions permit. It is planned that the number of longline sets will be 60 in ... four reserch blocks. It is planned to complete the study for Dissostichus spp. in Subarea 88.3 within 3 ...
Meeting Document : WG-FSA-17/34 : Auteur(s): Delegation of Ukraine
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Selectivity-induced bias in growth parameter estimates
Abstract: A short simulation study has been carried out to investigate the size of the bias in ... being included in catch samples. Fish were included in catch samples from the population with ... selectivity function used in the simulations closely matched those used for current toothfish assessments in ... producing considerably lower estimates of L? and higher estimates of K than in the true population. The ...
Meeting Document : WG-FSA-SAM-05/19 : Auteur(s): G.P. Kirkwood (United Kingdom)
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Modifications to the Generalised Yield Model in 2004, version GYM501E.EXE
Abstract: The Generalised Yield Model is used by the WG-FSA in the assessments of Champsocephalus ... gunnari, Dissostichus eliginoides and Euphausia superba. Its current version is GYM501D.EXE. In the course ... in 2004 an error in the calculation of the recruitment series from survey data was detected. This ... error does not affect the assessments undertaken in recent years. This paper presents the nature of the ...
Meeting Document : WG-FSA-04/91 : Auteur(s): A.J. Constable (Australia)
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Energetics of diving in macaroni penguins
Abstract: Heart rate (fH), abdominal temperature (Tab) and diving depth were measured in thirteen ... adjustments that might facilitate the diving behaviour observed in this species. In common with other diving ... birds, macaroni penguins showed significant changes in fH associated with diving, and these variables ... accounted for 36% of the variation in dive duration. When VO2 was calculated for dives of different ...
Meeting Document : WG-EMM-03/39 : Auteur(s): J.A. Green, P.J. Butler, A.J. Woakes and I.L. Boyd (United Kingdom)
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Modelling Southern Ocean krill population dynamics: biological processes generating fluctuations in the South Georgia ecosystem
important aspect of the variation is fluctuation in the abundance of krill, the major prey item of many of ... the higher predators. Direct impacts of variability in the large-scale physical environment, such as ... changes in ocean circulation, have been suggested as the main factor generating the observed fluctuations ... dynamics in the observed variation. Here, analyses of a model of krill population development and predator ...
Meeting Document : WG-EMM-01/53 : Auteur(s): E. Murphy and K. Reid (United Kingdom)
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PROPOSAL FOR AN EXTENSION TO THE MARK–RECAPTURE EXPERIMENT TO ESTIMATE TOOTHFISH POPULATION SIZE IN THE SOUTH OF SUBAREA 48.4
Abstract: 1. A three-year tagging study in the South of Subarea 48.4 was initiated in the 2008/09 ... , size, movement and growth of both Dissostichus eleginoides and Dissostichus mawsoni in the South of ... 48.4; 2. In 2008/09 a total of 214 D. eleginoides and 192 D. mawsoni were tagged and released. Two ... tagged D. mawsoni were recaptured in the first season. 3. Macrourids and rajids dominated finfish bycatch ...
Meeting Document : WG-FSA-09/18 : Auteur(s): J. Roberts and D.J. Agnew (United Kingdom)
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A comparison of densities and length distribution of the Champsocephalus gunnari stock in Subarea 48.3 between years 1994 and 1995
Abstract: Mean densities and length structure of Champsocephalus gunnari obttained in the 1994 ... and 1995 surveys conducted in subarea 48.3 by BIP Dr: E L HOLMBERG are compared. Haul locations were ... ; 151–250 and 251–500 m depth strata. The cluster structure is considered as a nested factor in an ANOVA ... design. Forty five stations in the first cruise and 48 in the second were analyzed. Of these, 51 pairs of ...
Meeting Document : WG-FSA-95/34 : Auteur(s): Marschoff, E., Calcagno, J., Gonzalez, B.
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DEVELOPING MODELS OF ANTARCTIC MARINE ECOSYSTEMS IN SUPPORT OF CCAMLR AND IWC
is currently in draft form open to comment and is being developed to provide an introduction to the ... to the use of ecosystem models in CCAMLR and the IWC and a history of the developmental work in those ... that need to be considered in parameterising a model, providing input data for those models and for ... addressing uncertainties in this process. Lastly, it summarises the modelling platforms being developed in ...
Meeting Document : WG-EMM-08/14 : Auteur(s): A. Constable (Australia)