Résultats de la recherche
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Whales: Trophic modelling of the Ross Sea
Description / Abstract: A supporting document to the CCAMLR Science paper: M.H. Pinkerton, J.M ... . Bradford-Grieve and S.M. Hanchet. 2010. A balanced model of the food web of the Ross Sea, Antarctica ... rather than black. The white colour is often tinged yellow, probably due to a diatom film. The eyepatch ... population is assumed to be in steady state, as no long-term trends in orca populations in the Ross Sea are ... & Joyce (1995) state that, with no correction for sighting efficiency (the probability of sighting an ... the Ross Sea. Not much is known of the biology of this species, and there are no estimates of ...
Document : Site Section: Publications
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Interactions of Patagonian toothfish fisheries with killer and sperm whales in the Crozet Islands Exclusive Economic Zone: an assessment of depredation levels and insights on possible mitigation strategies
Paper Title: Interactions of Patagonian toothfish fisheries with killer and sperm whales in the ... mitigation strategies Abstract / Description: Within the Crozet Islands Exclusive Economic Zone (EEZ), the ... , killer whales alone, and the two species co-occurring were observed on 32.6%, 18.6% and 23.4 ... % respectively of the 4 289 hauled lines. It was estimated that a total of 571 tonnes (€4.8 million) of ... by killer whales The depth at which the lines were set had no sig- nificant effect on the CPUE both ... < 0.001), but no interac- tion effect between the vessel identity and the other two variables was found ... this case, there was no effect of the length of the line on CPUE. Indeed, the latter remained low for ... were no additional benefits to vessels of travelling distances greater than 40–60 n miles. The data ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 179–195 : Auteur(s): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
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Revised research plan for the 2016/17 exploratory longline fishery of Dissostichus spp. in Subarea 48.6 by South Africa and Japan
Abstract: South Africa and Japan have revised the next season’s (2016/17) research plan in ... Subarea 48.6 using the latest CCAMLR C2 and Observer data, following several advices during WG-SAM meeting ... in 2016. We have used extracted data provided by CCAMLR Secretariat in this late August for the ... current analysis, but not used the cleaning data provided by them in this early September due to tight ...
Meeting Document : WG-FSA-16/32 Rev. 1 : Auteur(s): Delegations of Japan and South Africa
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Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives
Paper Title: Refinements to the strategy for managing depleted fish stocks based on CCAMLR ... decades is illustrated. These fishing mortalities are based on probabilistic descriptions of the future ... hence that additional management policies are required for depleted stocks. The implications of these ... studies for defining the terms 'depleted' and 'target levels for recovery' are briefly ... using the biomass from a deterministic projection (Le., no recruitment fluctuation) of the median of ... SC-CAMLR-BG-IX/BG/14 REFINEMENTS TO THE STRATEGY FOR ... fishing mortalities are based on probabilistic descriptions of the future states of a depleted stock ... management policies are required for depleted stocks. The implications of these studies for defining the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Auteur(s): de la Mare, W.K. and A. Constable
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Managing ecosystem uncertainty: critical habitat and dietary overlap of top-predators in the Ross Sea
coast of Victoria Land from 1990 through 2004, we summarize the foraging ranges from these sites and the ... managers of the close spatial and temporal ecological overlaps among top predators in the Ross Sea Shelf ... ) demonstrated that space-time overlap is critical to predicting the degree to which a fishery might affect a ... food web. The fisheries that we contemplate are those for Antarctic toothfish and the Antarctic minke ...
Meeting Document : WG-EMM-06/29 : Auteur(s): Testa, J.W., Stewart, B.S., Olmastroni, S., Lyver, P., Karl, B., Eastman, J., Barton, K., Ballard, G., Toniolo, V., Wilson, P., Ainley, D.
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Downward adjustments to local catch limits for the krill fishery in Subarea 48.1
multiple sites in Subarea 48.1. We developed a spline-based method to analyze the photographic data ... Abstract: Here we compile four vignettes that, together, provide the basis for making downward ... adjustments to local catch limits for the krill fishery in Subarea 48.1. We use the term local catch limit to ... refer to a catch limit that applies to a group of SSMUs (gSSMU), and the work presented here is based on ...
Meeting Document : WG-EMM-16/46 : Auteur(s): Antarctic Ecosystem Research Division, Southwest Fisheries Science Center and NOAA Fisheries
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On the intensity of sampling krill trawl catches
Paper Title: On the intensity of sampling krill trawl catches Abstract / Description: This paper ... uses actual krill length-frequency data in an attempt to address the problem of the determination of ... . The possible effect of two other factors (within-trawl variability and sample decomposition) which may ... influence length-frequency data quality is also considered. Attention is drawn to the following: • all ... were no significant differences (F=8.75, a=O.lO to 0.05) between mean lengths or the number of animals ... Figure 7. Results from the ANOV A (F=0.31, a=O.lO to 0.05) indicate no significant changes in mean ... , Australia: CCAMLR. p. 10. MILLER, D.G.M 1987. The South African SIBEX II cruise to the Prydz Bay region. S ... WG-KRILL-90/27 ON THE INTENSITY OF SAMPLING KRILL TRAWL ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 29–48 : Auteur(s): Miller, D.G.M.
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Revised research plan for the exploratory longline fishery for Dissostichus spp. in 2012/13 Subarea 48.6 and Divisions 58.4.1, 58.4.2 and 58.4.3a (this is a revision of WG-SAM-12/09)
groups, the west of Prydz Bay region seemed to be an important area for pre-adult D.mawsoni as reported ... Abstract: The research fishing proposal for Dissostichus spp. in Subarea 48.6 and Divisions ... 58.4.1, 58.4.2 and 58.4.3a is resubmitted following paragraph 3.24 of WG-SAM-12. In the present proposal ... , we firstly showed information of catch, efforts, tagging experimental results based on the CCAMLR C2 ...
Meeting Document : WG-FSA-12/60 Rev. 1 : Auteur(s): Delegation of Japan
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Guidelines for the preparation of hydroacoustic survey reports on krill
Paper Title: Guidelines for the preparation of hydroacoustic survey reports on krill Abstract ... / Description: The proposed guidelines provide an opportunity to perform comparative analyses and checks of ... surveys. The unification of echometric survey data is aimed at increasing the effectiveness of research on ... the quantitative assessment of biomass of organisms. The guidelines contain a description of ... - 165 - SC-CAMLR-V/BG/37 GUIDELINES FOR THE ... PREPARATION OF HYDROACOUSTIC SURVEY REPORTS ON KRILL I.L.Kalikhman (U.S.S.R.) Abstract The proposed ... echometric surveys of fish and krill, and to establish a data bank of these surveys. The unification of ... echometric survey data is aimed at increasing the effectiveness of research on the· quantitative assessment ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 165-193 : Auteur(s): Kalikhman, I.L.
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Analyses of acoustic line-transect data from the waters around South Georgia: estimation of krill (Euphausia superba Dana) – biomass
Paper Title: Analyses of acoustic line-transect data from the waters around South Georgia ... of zooplankton stocks in the waters around South Georgia was carried out during November and December ... 1981. The data have been analysed using various definitions of strata. The total biomass in the area of ... estimate of mean density throughout the region of 11.7 tonnes km-2. Although the estimate of the mean is ... South Georgia (Figure 1). There was no information available at the planning stage to produce a ... assuming no local production then a crude estimate of input rate may be calculated. Assuming the standing ... ). Transects are taken as the basic sample unit. Stratum No. of Density Variance Area Biomass Observations ... FROM THE WATERS AROUND SOUTH GEORGIA: ESTIMATION OF KRILL (EUPHAUSIA SUPERBA DANA) - BIOMASS E ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 225–243 : Auteur(s): Murphy, E., I. Everson and A. Murray