Résultats de la recherche
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Acoustic data analysis and models of krill spatial distribution
used in three descriptors of krill spatial aggregation: power spectra for krill biomass fluctuations in ... space, semivariogram (spatial autocorrelation of krill biomass) and the frequency distribution of krill ... biomass estimate. The wavenumber spectrum resembles a white noise at scales of 2-20 km, although at scales ... smaller than 1 km the spectrum appears to lose its power significantly. The semivariance of biomass does ...
Meeting Document : SC-CAMLR-VII/BG/25 : Auteur(s): United States of America
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Long-distance movements of Patagonian (Dissostichus eleginoides) and Antarctic toothfish (D. mawsoni) from fishery-based mark-recapture data
Ecuador to Uruguay, and in the sub-Antarctic and Antarctic while Antarctic toothfish (D. mawsoni) are ... found closer to the Antarctic continental shelf and generally south of the Polar Frontal Zone. Data from ... existing tagging studies indicate that both species are generally non-migratory with the majority of ... 067 fish tagged and released of which 2 072 (3.0%) have been recaptured; the median distance between ...
Meeting Document : WG-FSA-17/06 : Auteur(s): CCAMLR Secretariat
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Summary of monitoring and research activities at Svarthamaren, Dronning Maud Land
-178,240 (mean 119,000). Assuming that about 10 % of the colony is situated in inaccessible parts outside ... in addition to the numbers of birds breeding. Author(s): Lorentsen, S., Tveraa, T., Røv, N. Title ... the area covered by the monitoring system the mean number of pairs producing a chick each year is ... of the population monitoring show that the number of pairs with chick or egg varied between 55,387 ...
Meeting Document : WG-EMM-97/78 : Auteur(s): Lorentsen, S., Tveraa, T., Røv, N.
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Detection of predator dive patterns from stationary echosounder data
clear patterns in the dive data with regards to time of year as well as time of day. At the temporal ... Abstract: Standard protocols for processing of echosounder data are geared towards the estimation ... of biomass indices of pelagic organisms. More transient visitors to the watercolumn however also give ... echoes, and the data provided by the echosounders may be used to assess the behaviour of these organisms ...
Meeting Document : WG-EMM-2019/34 : Auteur(s): T. Klevjer and G. Skaret
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Trade data analysis – Annual report of global toothfish trade data
forms with mean unit values of 24.03 US$/kg for imports and 23.40 US$/kg for exports. The data ... sources for the trade of toothfish products for the 2018 calendar year. The analysis has identified that ... identified the largest importer was the United States of America (USA), accounting for 36.50% of the global ... import market. The largest exporter was Chile accounting for 17.90% of the global export market ...
Meeting Document : CCAMLR-38/BG/09 : Auteur(s): CCAMLR Secretariat
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Characteristics of krill swarms from Prydz Bay
survey of Prydz Bay, Antarctica, in December 1990. Swarm length, depth, thickness, MVBS and interswarm ... length was calculated for swarms of euphausids encountered along a 78 km transect over the continental ... crystallorophias. An increase in swarm length was seen with increasing distance from the coast. Author(s): D.J ... Abstract: The CCAMLR.AUS dataset available to the Subgroup on Survey Design was derived from a ...
Meeting Document : WG-KRILL-91/07 : Auteur(s): D.J. Agnew (Secretariat) and I.R. Higginbottom (Australia)
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CEMP 2018/19 data and updated spatial analysis of Area 48
patterns of inter-annual variability of the response by krill-dependent predators to changes in the ... ecosystem. The CSI analysis continues to show evidence of concordance of response to changes in the ... Abstract: This paper reports on the CCAMLR Ecosystem Monitoring Program (CEMP) data submissions ... for the 2018/19 monitoring season detailed by site and species, and includes an update to the Combined ...
Meeting Document : WG-EMM-2019/04 : Auteur(s): CCAMLR Secretariat
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Feeding and food intake of Electrona carlsbergi (Tåning) (Myctophidae)
E. carlsbergi during the year in the southern regions of the Antarctic Convergence is about 15 times ... Abstract: In the summer-autumn period E. carlsbergi fed mainly on copepods. Daily food intake ... measured using various methods ranged from 3.7 to 5.6 % of fish body weight. The amount of food consumed by ... its own weight. Author(s): O.V. Gerasimova (USSR) Title: Feeding and food intake of Electrona ...
Meeting Document : WG-FSA-90/18 : Auteur(s): O.V. Gerasimova (USSR)
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Distribution of foraging by female Antarctic fur seals
the spatial impact of breeding female fur seals on krill at South Georgia. This suggested that, in ... present in some regions where they forage intensively. However, mean consumption was about one-tenth of ... the mean density of krill. Author(s): I.L. Boyd, I.J. Staniland and A.R. Martin (United Kingdom ... Abstract: The study examined the distribution of critical habitat for foraging by female ...
Meeting Document : WG-EMM-03/38 : Auteur(s): I.L. Boyd, I.J. Staniland and A.R. Martin (United Kingdom)
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Proposal for a revised summary table used for assessment of new and ongoing research plans
Abstract: At WG-SAM-2019, it was highlighted that some of the language in the table used to ... English as their first language. In this paper, we propose some revisions to the table to attempt to ... assess research plans in data-poor fisheries was ambiguous, in particular to delegates that do not have ... used for assessment of new and ongoing research plans Microsoft Word File: fsa-2019-55.docx Approval ...
Meeting Document : WG-FSA-2019/55 : Auteur(s): C. Péron and D. Welsford