Résultats de la recherche
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Krill biomass and distribution in Subarea 48.2 during summer 1996
density in the day-time amounted to 30.4 g/sq.m are comparable with density values, observed in the ... obtained seem to be considered as underestimated and typical only for the late summer season, since in the ... early summer season krill density may be higher. Krill biomass estimate (1.12 ± 0.093 mln.t) in acoustic ... characterized by relatively high accurancy (CV = 4.1 %). However, this estimate is likely to be biased towards ...
Meeting Document : WG-EMM-97/49 : Auteur(s): Kasatkina, S.M., Abramov, A.M., Polischuk, M.I., Sushin, V.A.
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Hydroacoustic observations of the vertical distribution of icefish Champsocephalus gunnari in the western part of the slope of the South Georgia Island in December 1999–January 2000
be concluded that assessments of Champsocephalus gunnari stock based on the results of bottom trawl ... echograms obtained with the use of an echograph of the "Priboi-101" echo sounder during the ... concentrations of icefish can be considered by the type of the vertical distribution as bottom/pelagic ones, and ... surveys can be underestimated. Author(s): V.L. Senioukov (Russia) Title: Hydroacoustic observations of ...
Meeting Document : WG-FSA-00/19 : Auteur(s): V.L. Senioukov (Russia)
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The utilization of seabird censuses for krill monitoring
Ocean is explored. No variation source directly linked with krill was identified by means of ... capable of detecting changes in bird abundance and/or species composition, associated with three levels of ... krill abundance. A vector close to multi-normality was obtained, thus suggesting that refinements of the ... efficient tool for statistical tests of significance. The most promising approach seems to be the ... hypothesis testing with the material at hand. Methods that can be used for comparison with other data sets ... of Fx(t) represented as ordinates of the abscissa (t). In that way, each point will be replaced by ... ships are an inexpensive and simple methodology which can be performed with a minimum of training, thus ... of being investigated. It is to be noted that bird observations can be carried out from any ship ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 393-425 : Auteur(s): Marschoff, E.R., J.G. Visbeek and L.R. Fontana
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Diagnostic tools for Champsocephalus gunnari stock assessments
for a set of standard diagnostics including R code to be used for mackerel icefish (Champsocephalus ... gunnari) stock assessments presented to WG-FSA. Author(s): D. Maschette, T. Earl and R. Sinègre Title ...
Meeting Document : WG-SAM-18/34 : Auteur(s): D. Maschette, T. Earl and R. Sinègre
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Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history
) and increased with age at death. Changes in the growth pattern of teeth suggested that fur seals which ... significant correlations between morphometrics of teeth and those of seals, suggesting that tooth growth ... compared with the expected layer depth based on a linear relationship between layer depth and age at which ... in different years, suggesting that growth was greater in some years than others. No trends in cohort ...
Meeting Document : WG-CEMP-93/11 : Auteur(s): I.L. Boyd and J.P. Roberts (United Kingdom)
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Beach debris survey - Main Bay, Bird Island South Georgia 1992/93
bands were not found until August, coinciding with the arrival of krill fishing vessels off northwest ...
Meeting Document : CCAMLR-XIII/BG/03 : Auteur(s): Delegation of United Kingdom
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Mackerel icefish ecological indices
CEMP. With that in mind the following indices are outlined that might be incorporated in the programme ...
Meeting Document : WG-EMM-03/42 : Auteur(s): I. Everson (United Kingdom), K.-H. Kock (Germany) and A.W. North (United Kingdom)
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Оn seasonal and interannual dynamics of ice conditions in the Weddell Sea and its relation to the WSMPA proposal
Abstract: It is shown that the WS MPA boundaries should be revised in compliance with sea-ice ... research tasks in designated areas. Spatial planning in the Weddell Sea should make provisions that ice ...
Meeting Document : CCAMLR-XXXVII/BG/21 : Auteur(s): Delegation of the Russian Federation
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
-setting characteristics similar to the experimental vessel, this sink rate should be achievable with 4 kg ... vessels to derive a sink rate and line-weighting regime that would minimise the capture of albatrosses ... weights. Asymptotic sink rates (0.1-0.15 m/s) were achieved with 70 m intervals between 6.5 kg weights ... . Sink rates to 4 m depth were greatest with 35 m (0.44 m/s) and 50 m (0.33 m/s) between weights. For ... respectively, so that results of sink-rate trials can be placed in context with the fishing operations and ... kg/70 m) of longline. With this amount of weight, sink rates >0.3 m/s would be expected. Note that ... hooks to seabirds. With the In Sung 66 it is to be expected that the different line configuration ... experimental vessel, this sink rate should be achievable with 4 kg weights distributed every 40 m on longlines ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Auteur(s): Robertson, G.G
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Modelling Southern Ocean krill population dynamics: biological processes generating fluctuations in the South Georgia ecosystem
model solutions with the predator diet data indicates that the model can reproduce the observed pattern ... . The krill population model was combined with a size-based selection function and used to generate ... of variation and emphasizes that adult population changes are a key aspect of the interannual ... fluctuations observed during some years. Low krill abundance was associated with reduced representation of the ...
Meeting Document : WG-EMM-01/53 : Auteur(s): E. Murphy and K. Reid (United Kingdom)