Résultats de la recherche
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Reproductive performance of seabirds and seals at South Georgia and Signy Island, South Orkney Islands, 1976-1987: implications for Southern Ocean monitoring studies
Paper Title: Reproductive performance of seabirds and seals at South Georgia and Signy Island ... / Description: Aspects of the reproductive performance over the last decade of black-browed, grey-headed and ... reviewed. Breeding success of the wandering albatross, which breeds in winter and eats fish and squid, has ... some or all of breeding population size, breeding success, foraging trip duration and offspring growth ... ) REPRODUCTIVE PERFORMANCE OF SEABIRDS AND SEALS AT SOUTH GEORGIA AND SIGNY ISLAND, SOUTH ORKNEY ISLANDS, 1976 ... and P. Rotheryl (United Kingdom) Abstract Aspects of the reproductive performance over the last ... decade of Black-browed, Grey-headed and Wandering Albatrosses, Gentoo and Macaroni Penguins and ... , South Orkney Islands, are summarised and reviewed. Breeding success of the Wandering Albatross, which ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 445-447 : Auteur(s): Croxall, J.P., T.S. McCann, P.A. Prince and P. Rothery
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The use of predator-derived krill length-frequency distributions to calculate krill target strength
Paper Title: The use of predator-derived krill length-frequency distributions to calculate krill ... krill sampled from the diet of predators to provide a length-frequency distribution of krill at times ... , i.e during logistic/resupply operations. This will allow a robust estimate of krill abundance to be ... calculated from acoustic data. Changes in the lengthfrequency distribution of krill over a period of a few ... of this paper is to assess the potential for using predator-derived length-frequency distri ... USE OF PREDATOR-DERIVED KRILL LENGTH-FREQUENCY DISTRIBUTIONS TO CALCULATE KRILL TARGET STRENGTH K ... Marine Laboratory, University of St Andrews St Andrews, Fife KY16 BLB, United Kingdom Abstract The ... resource management. We propose a method using krill sampled from the diet of predators to provide a ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 155–163 : Auteur(s): Reid, K. and A.S. Brierley
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Estimation of krill (Euphausia superba) mortality and production rate in the Antarctic Peninsula region
Paper Title: Estimation of krill (Euphausia superba) mortality and production rate in the ... data of an identical survey with RV Polarstern in 1987/88. Seasonal variation between summer and winter ... abundance/biomass data exceeded a factor of 1:35, while inter-annual variability between available surveys ... reached only a factor of 1:1.6. Krill mortality was calculated by linearized catch curve analysis and ... . Survey methods of appraising fishery resources. FAO Fish. Tech. Pap. 171: 1-76. SIEGEL, V. 1986 ... WG-KRILL-91/15 ESTIMATION OF KRILL (EUPHAUSIA SUPERBA ... January 1990. Results were compared with data of an identical survey with RV Polarstern in 1987/88 ... . Seasonal variation between summer and winter abundance/biomass data exceeded a factor of 1:35, while ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 159–176 : Auteur(s): Siegel, V.
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Standardization of fishing effort for Champsocephalus gunnari in the South Georgia area (Subarea 48.3)
Paper Title: Standardization of fishing effort for Champsocephalus gunnari in the South Georgia ... area (Subarea 48.3) Abstract / Description: Traditional calculation of catch-per-unit-effort series is ... inflexible in its use of data types and has no estimate of accuracy. A standardized CPUE index for ... different classes (countries, types of vessel, fishing gear, months and years). Multiple regression is used ... . In the abovementioned paper fishing effort was standardized in the following way. A certain type of ... WG-FSA-90/27 STANDARDIZATION OF FISHING EFFORT FOR ... calculation of catch-per-unit-effort series is inflexible in its use of data types and has no estimate of ... a multiplicative model and data from many different classes (countries, types of vessel, fishing ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 327–336 : Auteur(s): Gasiukov, P.S.
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Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in the southwestern Atlantic
Paper Title: Comparative feeding ecology of Patagonian toothfish (Dissostichus eleginoides) in ... the southwestern Atlantic Abstract / Description: The diet of Patagonian toothfish (Dissostichus ... Argentinian continental shelf/slope, the length of D. eleginoides ranged from 30 to 95 cm total length (TL ... juvenile and adult stages, and ranged between 18 and 212 cm TL. The diets of fish of various sizes and both ... 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 ... continental shelf/slope, the length of D. cleiyiizoides ranged from 30 to 95 cm total length (TL) which ... adult stages, and ranged between 18 and 212 cm TL. The diets of fish of various sizes and both sexes ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 105–124 : Auteur(s): García de la Rosa, S.B., F. Sánchez and D. Figueroa
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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 ... 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 ... . Regression equations for the estimation of horizontal opening from other, more easily measured variables ... South Georgia are estimated using a new regression equation. The results of this calculation are ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Auteur(s): Pilling, G. and G. Parkes
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Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time
Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... gain, including the effects of temperature, standard sphere and time, is 2.9 dB. Gain values calibrated ... with the Cu sphere are, with the exception of the long pulse length, lower than those from the WC ... WG-KRll.L-92/17 CALm RATION OF AN ACOUSTIC ECHO ... results of an extensive calibration of a Simrad EK500 scientific echosounder with a 120 kHz split-beam ... ), target depth (0.8 to 7.5 m), and time (149 days). The total range in TS gain, including the effects of ... exception of the long pulse length, lower than those from the WC sphere. The general trends are consistent ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Auteur(s): Demer, D.A. and R.P. Hewitt
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Large-scale peculiarities of phytocenosis species composition in the surface layer in the Antarctic Atlantic and Indian Ocean sectors
Paper Title: Large-scale peculiarities of phytocenosis species composition in the surface layer ... dominated over vast areas within the distribution of the south peripheral waters and the centre of the ... Weddell Gyre. In the eastern Weddell Gyre a great change in the composition of phytoplankton species was ... , the Convergence Zone proper, south periphery of the Antarctic Circumpolar Current). A great change in ... SC-CAMLR-VII/8G/16 LARGE-SCALE PECULIARITIES OF ... the distribution of the south peripheral waters and the centre of the Weddell Gyre. In the eastern ... Weddell Gyre a great change in the composition of phytoplankton species was registered. Variability in ... , south periphery of the Antarctic Circumpolar Current). A great change in phytoplankton composition was ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 201-214 : Auteur(s): Makarov, R.R. and K.P. Fedorov
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Surveys of breeding penguins and other seabirds in the South Shetland Islands, Antarctica, January-February 1987*
Paper Title: Surveys of breeding penguins and other seabirds in the South Shetland Islands ... , Antarctica, January-February 1987* Abstract / Description: Surveys conducted as part of the Antarctic Marine ... Living Resources Program in 1987 provided data on the number, size, and location of penguin and Antarctic ... blue-eyed shag colonies and the breeding status of other seabirds in the South Shetland Islands ... - 449 - SC-CAMLR-VI/BG/19 (WG-CEMP-87/6) SURVEYS OF ... * W.D. Shuford and L.B. Spear1 (USA) Abstract Surveys conducted as part of the Antarctic Marine ... Living Resources Program in 1987 provided data on the number, size, and location of penguin and ... Antarctic blue-eyed shag colonies and the breeding status of other seabirds in the South Shetland Islands ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 449-451 : Auteur(s): Shuford, W.D. and L.B. Spear
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Sensitivity analysis for parameters of predatory species CCAMLR Ecosystem Monitoring Program
Paper Title: Sensitivity analysis for parameters of predatory species CCAMLR Ecosystem Monitoring ... Program Abstract / Description: Following the request of the Scientific Committee of CCAMLR to conduct ... such a treatment of data obtained at the Magnetic Island Adélie penguin colony in Prydz Bay in the 1987 ... arrival at breeding colonies; duration of first incubation shift; duration of adult foraging trips ... WG-CEMP-89/7 SENSITIVITY ANALYSIS FOR PARAMETERS OF ... of the Scientific Committee of CCAMLR to conduct sensitivity analyses on existing data regarding ... predator breeding biology parameters, this report presents such a treatment of data obtained at the ... ; • duration of first incubation shift; • duration of adult foraging trips; • breeding success; and • chick ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 411–432 : Auteur(s): Whitehead, M.D.