Résultats de la recherche
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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 ... 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 ... length-frequency distribution of krill at times when it is possible to run automated shipboard acoustic ...
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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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 ... 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 ... standardized CPUE shows the same trends independent of the values selected to standardize the model. The mean ...
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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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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Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
index of a morphometric characteristic? Abstract / Description: In sexually dimorphic species ... discriminant analysis can be used to determine the sex of individuals, it is only able to correctly sex a ... certain proportion of birds. Two overlapping normal distributions are used to show that there is a ... using discriminant analysis. When discriminant functions are able to correctly determine the sex of ... TO SEX PENGUINS PRIOR TO CALCULATING AN INDEX OF A MORPHOMETRIC CHARACTERISTIC? D.J. Agnew ... sex of individuals, it is only able to correctly sex a certain proportion of birds. Two overlapping ... discriminant functions are able to correctly determine the sex of birds with greater than 80% success, the ... % success may be used to derive statistically robust estimates of male and female characteristics ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Auteur(s): Agnew, D.J.
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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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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 ... environment essential for the effective management of the Antarctic marine ecosystem within the requirements ... of CCAMLR Article II. Eight attributes (purpose, description, variables, driving forces, time ... development of suitable simulations of important Antarctic marine ecosystem interactions and to facilitate the ... AS PART OF THE CCAMLR MANAGEMENT REGIME D.G.M. Miller (South Africa) Abstract This paper ... effective management of the Antarctic marine ecosystem within the requirements of CCAMLR Article 11. Eight ... data) were identified in an attempt to provide a blueprint for the development of suitable ... simulations of important Antarctic marine ecosystem interactions and to facilitate the formulation of a ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 295-322 : Auteur(s): Miller, D.G.M.
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On reproduction of Electrona carlsbergi (Tåning)
Paper Title: On reproduction of Electrona carlsbergi (Tåning) Abstract / Description: This paper ... presents results from histological examinations of gonads of Electrona carlsbergi from the Atlantic sector ... of the Southern Ocean. From materials available it has been ascertained that E. carlsbergi spawns in ... the notal waters. Maturation of females begins when body length reaches 76 to 78 mm. Vitellogenesis is ... WG-FSA-90/20 ON REPRODUCTION OF ELECTRONA CARLSBERGI ... (TANING) G.P. Mazhirina* Abstract This paper presents results from histological examinations of ... gonads of Electrona carlsbergi from the Atlantic sector of the Southern Ocean. From materials available ... it has been ascertained that E. carlsbergi spawns in the notal waters. Maturation of females begins ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 397–409 : Auteur(s): Mazhirina, G.P.
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Integration of CPUE data into assessments using the Generalised Yield Model
Paper Title: Integration of CPUE data into assessments using the Generalised Yield Model Abstract ... accorded high priority to the development of methods of integrating different indicators of stock status ... the use of importance sampling, for incorporating information on trends in standardised CPUEs into GYM ... assessments. The use of the method is illustrated using data for Patagonian toothfish (Dissostichus ... CCAMLR Science, Vo l . 8 (2001): 65-74 INTEGRATION OF ... permettant de r6aliser les 4valuations par le GYM. Resumen Durante los ultimos tres afios, el grupo de ... tendencias de los datos normalizados de CPUE a las evaluaciones realizadas con el modelo general de ... Group on Fish Stock Assessment (WG-FSA) has had available to it two indicators of stock status for ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Auteur(s): Kirkwood, G.P. and A.J. Constable
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Variations in echosounder calibration with temperature, and some possible implications for acoustic surveys of krill biomass
implications for acoustic surveys of krill biomass Abstract / Description: Accurate estimation of krill ... biomass by acoustic techniques is dependent on a number of factors of which one of the most fundamental is ... S v transducer gains at South Georgia (sea temperature at depth of transducer = 2.3 o C) were on ... were taken of the differences in gain settings, then integrated 120 kHz echo signals would be under ... OF KRILL BIOMASS A.S. Brierley, C. Goss, J.L. Watkins and P. Woodroffe British Antarctic Survey ... Abstract Accurate estimation of krill biomass by acoustic techniques is dependent on a number of factors ... of which one of the most fundamental is accurate echosounder calibration. The Simrad EK500 ... (sea temperature at depth of transducer = 2.3'C) were on average 1.4 dB less than in European waters ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 273–281 : Auteur(s): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe