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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 : Автор(ы): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
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Indices of prey availability near the Seal Island CEMP site: 1990 to 1996
Paper Title: Indices of prey availability near the Seal Island CEMP site: 1990 to 1996 Abstract ... Seal Island CEMP site during the austral summers of 1990 to 1996. The indices are measures of average ... / Description: Four indices of prey availability are calculated from surveys conducted in the vicinity of the ... surveys each year were subsampled to include the foraging range of predators breeding at Seal Island ... . Blank cells indicate that no data are available. RESULTS AND DISCUSSION Values of the four indices ... AVAILABILITY NEAR THE SEAL ISLAND CEMP SITE: 1990 TO 1996 R.P. Hewitt, G. Watters and D.A. Demer Southwest ... availability are calculated from surveys conducted in the vicinity of the Seal Island CEMP site during the ... decibels. Hewitt et al. Table 2: Annual indices of prey availability near the Seal Island CEMP site ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 37–45 : Автор(ы): Hewitt, R.P., G. Watters and D.A. Demer
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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 : Автор(ы): de la Mare, W.K. and A. Constable
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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 : Автор(ы): Miller, D.G.M.
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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 : Автор(ы): 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 : Автор(ы): Murphy, E., I. Everson and A. Murray
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Modelling and decision making as part of the CCAMLR management regime
Paper Title: Modelling and decision making as part of the CCAMLR management regime Abstract ... / Description: This paper outlines a stylised scheme designed to address the multi-objective decision ... environment essential for the effective management of the Antarctic marine ecosystem within the requirements ... horizons, time steps, constraints and data) were identified in an attempt to provide a blueprint for the ... the Antarctic marine ecosystem, it appears inevitable that no single model will be flexible enough ... present no coherent management plan has yet been formulated for the system briefly outlined above ... population, there is no real need to have both predators and prey as variables in the model - prey ... AS PART OF THE CCAMLR MANAGEMENT REGIME D.G.M. Miller (South Africa) Abstract This paper ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 295-322 : Автор(ы): Miller, D.G.M.
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An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data
Paper Title: An assessment of the exploratory fishery for Dissostichus spp. on BANZARE Bank ... (CCAMLR Division 58.4.3b) based on fine-scale catch and effort data Abstract / Description: In 2006, the ... CCAMLR Scientific Committee expressed concern as to the status of the stock on which the exploratory ... biological data submitted by scientific observers on board vessels in the fishery. Results of a Leslie ... effort in the fishery. Given the short period fished by vessels in each season (December to March), no ... data recorded for total catch weight, 21 had no data recorded for total number of fish caught, and the ... remainder had no soak time recorded. Of the latter, recorded longline set and haul times could not rea ... captured no D. elegi- noides. While clearly D. mawsoni has proved the pri- mary species captured by the ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 55–78 : Автор(ы): McKinlay, J.P., D.C. Welsford, A.J. Constable and G.B. Nowara
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Analysis of haul data from the South Georgia krill fishery
Paper Title: Analysis of haul data from the South Georgia krill fishery Abstract / Description ... : Data from individual hauls carried out by vessels operating in the South Georgia krill fishery between ... 1994 and 1996 were examined and a range of descriptive measurements reflecting the fishery operation ... were produced. The measurements emphasise that the krill fishery at South Georgia was geographically ... DATA FROM THE SOUTH GEORGIA KRILL FISHERY P.N. Trathan, I. Everson and E.J. Murphy British Antarctic ... out by vessels operating in the South Georgia krill fishery between 1994 and 1996 were examined and a ... range of descriptive measurements reflecting the fishery operation were produced. The measurements ... emphasise that the krill fishery at South Georgia was geographically focused, operating in a limited area ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Автор(ы): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
the southwestern Atlantic Abstract / Description: The diet of Patagonian toothfish (Dissostichus ... eleginoides) was investigated in two offshore regions in the southwestern Atlantic: on the Argentinian ... °-45°W. The South Georgia area was divided into two zones: the shelf zone and deep-water zone. On the ... Argentinian continental shelf/slope, the length of D. eleginoides ranged from 30 to 95 cm total length (TL ... that D. eleginoides is an opportunistic feeder. We found no significant differences in the diet and ... FEEDING ECOLOGY OF PATAGONIAN TOOTHFISH (DISSOSTICHUS ELEGINOIDES) IN THE SOUTHWESTERN ATLANTIC S.B ... Plata, Argentina Abstract The diet of Patagonian tootl~fish (Dissosfich~~s clegit~oides) was ... investigated in two offshore regions in the southwestern Atlantic: on the Argentinian continental shelf/slope ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Автор(ы): García de la Rosa, S.B., F. Sánchez and D. Figueroa
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