Résultats de la recherche
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The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design
Paper Title: The CCAMLR-2000 Krill Synoptic Survey: a description of the rationale and design ... Abstract / Description: The design of the CCAMLR-2000 Krill Synoptic Survey (CCAMLR-2000 Survey) is ... described. The primary objective of the survey was to improve estimates of the pre-exploitation biomass of ... the north of the Antarctic Peninsula (CCAMLR Statistical Subareas 48.1,48.2,48.3 and 48.4). Within ... Shetland Islands 7.50 - east Numberof Width of Width of Transect Transects Transect Samplin Inter-zone ... primary sampling units to the east of the Antarctic Peninsula. This overlap led to a change in the ... additional benefit of this randomisation scheme is that it minimises the loss of efficiency related to ... KRILL SYNOPTIC SURVEY: A DESCRIPTION OF THE RATIONALE AND DESIGN P.N. Trathan W , J.L. Watkins ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 1–23 : Auteur(s): Trathan, P.N., J.L. Watkins, A.W.A. Murray, A.S. Brierley, I. Everson, C. Goss, J. Priddle, K. Reid, P. Ward, R. Hewitt, D. Demer, M. Naganobu, S. Kawaguchi, V. Sushin, S.M. Kasatkina, S. Hedley, S. Kim and T. Pauly
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An assessment of temporal variability and interrelationships between CEMP parameters collected on Adélie penguins at Béchervaise Island
Abstract: We examined temporal variability in a series of CEMP parameters collected over the ... the correlation of each parameter with breeding success. Breeding success was measured in terms of 1 ... ) the absolute number of chicks on the island which fully crèche and 2) the number of chicks crèched per ... nest with eggs. We found a low degree of correlation between incubating and brooding nest counts which ...
Meeting Document : WG-EMM-02/46 : Auteur(s): L.M. Emmerson, J. Clarke, K. Kerry and C. Southwell (Australia)
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Comparisons in prey distribution between inshore and offshore foraging areas of chinstrap penguins and Antarctic fur seals at Seal Island
foraging trip such as Antarctic fur seals (Arctocephalus gazella) and overnight foraging chinstrap penguins ... ; their ventral light organs may become easier target for predators at night. Thus, aggregation pattern of ... krill, body size/maturity stage of krill and availability of myctophid fish may make the slope/offshore ... region favorable foraging areas in spite of its lower krill density. Author(s): Ichii, T., Bengtson, J.L ...
Meeting Document : WG-EMM-96/49 : Auteur(s): Ichii, T., Bengtson, J.L., Boveng, P., Cameron, M.F., Naganobu, M., Meyer, W.R., Hiruki, L.M., Takao, T., Jansen, J.K., Kawaguchi, S.
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Environmental variability and the behavioural dynamics of Antarctic fur seals in the South Atlantic
climate variation. Fur seal foraging trip duration was transformed into a normally distributed index of ... Abstract: Variability in the reproductive performance of marine predators may be a result of ... physical forcing by large-scale oceanographic variability. Time lags, remoteness from the epicentre of a ... physical process and the simultaneous action of multiple physical processes often mean that it is difficult ...
Meeting Document : WS-AREA 48-98/16 : Auteur(s): I.L. Boyd (UK)
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Variation in reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implications for southern ocean monitoring studies
success, foraging trip duration and offspring growth rate. 1977-78 and 1983-84 were summers of ... Abstract: Aspects of the reproductive performance of Black-browed, Grey-headed and Wandering ... Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... proportion of their diet, have shown major fluctuations in some or all of: breeding population size, breeding ...
Meeting Document : SC-CAMLR-VI/BG/15 : Auteur(s): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)
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Variation or reproductive performance of seabirds and seals at South Georgia, 1976–1986 and its implication for Southern Ocean monitoring studies
success, foraging trip duration and offspring growth rate. 1977-78 and 1983-84 were summers of ... Abstract: Aspects of the reproductive performance of Black-browed, Grey-headed and Wandering ... Orkney Islands) are summarised and reviewed. Breeding success of the Wandering Albatross, which breeds in ... proportion of their diet, have shown major fluctuations in some or all of: breeding population size, breeding ...
Meeting Document : WG-CEMP-87/13 : Auteur(s): J.P. Croxall, T.S. McCann, P.A. Prince and P. Rothery (United Kingdom)
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Review of activities in monitoring marine debris in the CAMLR Convention Area
-fishing items such as packaging and wood remain the most common type of debris items found in beach ... Conservation Measure 26-01 requiring packaging bands to be cut up into 30 cm pieces. The amount of debris in ... colonies of grey-headed albatrosses and black-browed albatrosses at Bird Island has increased recently, and ... the major category of items found was plastics. The amount of fishing related items (fishing lines ...
Meeting Document : WG-IMAF-11/04 Rev. 1 : Auteur(s): Secretariat
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Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3
Paper Title: Performance and geometry of the FP-120 trawl used during UK fish stock assessment ... opening (and, thus, swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl ... presented. Regression equations for the estimation of horizontal opening from other, more easily measured ... around South Georgia are estimated using a new regression equation. The results of this calculation are ... increases the chances of damage to or loss of bottom trawl gear. For example, during the survey undertaken ... using a single transducer mounted in the middle of the headline during the tow. This measurement can ... AND GEOMETRY OF THE FP-120 TRAWL USED DURING UK FISH STOCK ASSESSMENT SURVEYS AROUND SOUTH GEORGIA ... , swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl used during the ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Auteur(s): Pilling, G. and G. Parkes
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A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data
Paper Title: A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross ... since the late 1990s. No fishery-independent methods of monitoring stock abundance were plausible, and ... . Although tagging experiments are commonly used for assessing fish stocks, most rely on estimates of ... of tagged fish and subsequent multi-year data of recapture of tagged fish in conjunction with fishery ... Science, 15: 1–34. Chapman, D.G. and D.S. Robson. 1960. The analysis of a catch curve. Biometrics, 16 (3 ... tagging and tag loss are low, as under these conditions, the model maximises the use of mark-recapture ... Toothfish are large Nototheniids endemic to Antarctic and sub-Antarctic waters. There are two species of ... south of the Antarctic Con- vergence (Gon and Heemstra, 1990). Finfish fisheries in Antarctic waters ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Auteur(s): Mormede, S., A. Dunn and S.M. Hanchet
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Quantitative stock survey and some biological and morphometric characteristics of the deep-sea red crab Geryon quinquedens off south west Africa
processing the live material to a cooked frozen product, red crab is subject to a mass loss of about 54 per ... Abstract: In order to assess the abundance of the red crab Geryon quinquedens, two otter-trawl ... bimodal frequency distribution of female crabs was evident with modal sizes at 7.7 cm and 8.7 cm carapace ... cent. Analysis of stomach contents by volume showed that only 12 per cent of male stomachs contained 5 ...
Meeting Document : WS-CRAB-93/22 : Auteur(s): C.J. De B. Beyers and C.G. Wilke (South Africa)