Résultats de la recherche
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Using acoustic echo counting to estimate grenadier abundance in the Ross Sea (SSRU88.1I)
Abstract: Grenadiers (Macrourus spp.) are the main bycatch species in the exploratory longline ... fishery for toothfish in the Ross Sea. Previous studies concluded that acoustics methods could be used to ... targets on the eastern side of the Iselin Bank. The acoustic target strength distribution of single ... targets was similar to that predicted based on the expected size range of grenadiers. Variability in ...
Meeting Document : WG-FSA-14/62 : Auteur(s): Y. Ladroit, R.L. O’Driscoll and S. Mormede (New Zealand)
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Prey monitoring surveys: a discussion of the characteristics necessary in prey surveys
Paper Title: Prey monitoring surveys: a discussion of the characteristics necessary in prey ... distribution to relate to changes in predator demography. The paper discusses the constraints imposed on such ... DISCUSSION OF THE CHARACTERISTICS NECESSARY IN PREY SURVEYS I. Everson (United Kingdom) Abstract The ... CCAMLR Ecosystem Monitoring Programme requires information on prey distribution to relate to changes in ... CHARACTERISTICS NECESSARY IN PREY SURVEYS Inigo Everson British Antarctic Survey Natural Environment ... parameters is believed to be praticable. Evaluation of the cause of changes in the values of these ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 377-391 : Auteur(s): Everson, I.
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An updated descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2004/05
, recapture rates have tended to be higher in the northern and eastern SSRUs 88.1C and 88.2E. The maximum ... Abstract: An updated descriptive analysis of the toothfish tagging programme carried out in ... by area over the past three years have been in the same proportion as the catch by area. However ... 2001, but is still smaller than the mean size of fish taken in the commercial catch. Larger toothfish ...
Meeting Document : WG-FSA-05/34 : Auteur(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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REPORT OF THE UK GROUNDFISH SURVEY AT SOUTH GEORGIA (CCAMLR SUB-AREA 48.3) IN JANUARY 2009
assumed to be 3+. Very few juvenile fish were observed except in the south eastern sector of the South ... Abstract: In January 2009 the UK undertook a bottom trawl survey of CCAMLR Sub-area 48.3 on the ... GROUNDFISH SURVEY AT SOUTH GEORGIA (CCAMLR SUB-AREA 48.3) IN JANUARY 2009 Approval: Approved ...
Meeting Document : WG-FSA-09/09 : Auteur(s): M. Belchier, R.E. Mitchell, M.A. Collins, L. Kenny, M. Taylor, J. Nelson and L. Featherstone (United Kingdom)
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Consideration of major issues in ecosystem monitoring and management
Paper Title: Consideration of major issues in ecosystem monitoring and management Abstract ... interactions and the manner in which their populations vary naturally. Large-scale interactions are catered for ... in the Krill Yield Model (KYM). Smaller-scale interactions centre around three main categories: the ... availability of krill, variation in vital rates of the dependent species and the overlap between commercial ... . 9 (2002): 213–232 213 CONSIDERATION OF MAJOR ISSUES IN ECOSYSTEM MONITORING AND MANAGEMENT I ... for information on harvested and dependent species, their interactions and the manner in which their ... populations vary naturally. Large-scale interactions are catered for in the Krill Yield Model (KYM ... ). Smaller-scale interactions centre around three main categories: the availability of krill, variation in ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Auteur(s): Everson, I
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Revised proposal for the ongoing research plan on Patagonian toothfish (Dissostichus eleginoides) in Division 58.4.4b (2016/17–2020/21)
the research objectives. The survey design has been amended to avoid sea pen hotspots in the eastern ... this research plan in 2015 and a joint proposal was submitted for the first time in 2016 (WG-SAM-16/06 ... and improved the revised research plan presented in SC-CAMLR-XXXVII Annex 12 and redefined slightly ... whales (O. orca) ecology and depredation ”) are addressed in two documents submitted at WG-SAM-19. We ...
Meeting Document : WG-FSA-2019/64 : Auteur(s): Delegations of Japan and France
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Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia
Paper Title: Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around ... careful consideration of the data and available methods, several errors are noted in earlier estimates ... , 1905) from South Georgia waters began in the 1960s and large-scale catches have been reported from ... NATURAL MORTALITY RATE IN THE MACKEREL ICEFISH (CHMPSOCEPHALUS GUNNARn AROUND SOUTH GEORGIA I. Everson ... and available methods, several errors are noted in earlier estimates. Unfortunately, because none of ... INTRODUCTION In age-structured models of fish population dynamics, total mortality (Z) can be estimated ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Auteur(s): Everson, I
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Descriptive analysis of the Antarctic toothfish (Dissostichus mawsoni) tagging scheme in the Ross Sea for the years 1997/98 to 2003/04
Abstract: A descriptive analysis of the toothfish tagging programme carried out in the Ross Sea ... been in the same proportion as the catch by area. However, recapture rates have tended to be higher in ... the northern and eastern SSRUs 88.1C and 88.2E. The maximum movement of Antarctic toothfish from the ... the mean size of fish taken in the commercial catch. Larger toothfish (>35 kg) are difficult to tag ...
Meeting Document : WG-FSA-SAM-05/10 : Auteur(s): A. Dunn, S.M. Hanchet and K. Maxwell (New Zealand)
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Identifying marine protected areas (MPAs) in data-poor regions to conserve biodiversity and to monitor ecosystem change: an Antarctic case study
biodiversity. A great challenge for meeting this goal, particularly in data-poor regions, is to avoid ... is needed for identifying areas in data-poor regions that would enable the objectives to be achieved ... in the long term. We elaborate a procedure that would satisfy the first stage of identifying a RSMPA ... ). We apply the procedure to eastern Antarctica, a region with spatially-restricted sampling of most ...
Meeting Document : WS-MPA-11/05 : Auteur(s): A.J. Constable, B. Raymond, S. Doust, D. Welsford (Australia), P. Koubbi (France) and A.L. Post (Australia)
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Distribution and some biological features of icefish (Champsocephalus gunnari) at different life cycle stages in the South Georgia subarea
north-east to coastal areas in the northern and north-eastern part and to the open shelf areas in the ... fish distribution at different stages of physiological state. Juvenile fish mainly distribute in the ... south, immature fish- in the cast and southwest, while adult at the north of the shelf. It was revealed ... migrations: young fish above 4 cm in length distribute within 75 cm from the bottom, and migrate into the ...
Meeting Document : WG-FSA-99/65 : Auteur(s): Zh.A. Frolkina (Russia)