Resultados de la búsqueda
-
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 : Autor(es): Agnew, D.J.
-
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 : Autor(es): Miller, D.G.M.
-
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 : Autor(es): Mazhirina, G.P.
-
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 ... Group on Fish Stock Assessment (WG-FSA) has had available to it two indicators of stock status for ... direct assessments of the abundance of fish in the population (SC-CAMLR, 1995). The first of these ... indicators is a time series of estimates of biomass arising from use of the Generalised Yield Model (GYM ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 65–74 : Autor(es): Kirkwood, G.P. and A.J. Constable
-
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 : Autor(es): Brierley, A.S., C. Goss, J.L. Watkins and P. Woodroffe
-
Some comments on the procedure for testing estimators of krill abundance which utilise survey data
Paper Title: Some comments on the procedure for testing estimators of krill abundance which ... utilise survey data Abstract / Description: Since krill distributional data do show evidence of spatial ... correlation, estimators of abundance which attempt to model such effects (such as those based on Kriging ... computer generation of krill distribution patterns, which are compatible with existing information on the ... TESTING ESTIMATORS OF KRILL ABUNDANCE WHICH UTILISE SURVEY DATA D.S. Butterworth*, D.L. Borchers* and ... D.G.M. Miller** * ** Abstract Since krill distributional data do show evidence of spatial ... correlation, estimators of abundance which attempt to model such effects (such as those based on Kriging ... computer generation of krill distribution patterns, which are compatible with existing information on the ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 191–205 : Autor(es): Butterworth, D.S., D.L. Borchers and D.G.M. Miller
-
Investigations of required sampling regimes for environmental parameters
Paper Title: Investigations of required sampling regimes for environmental parameters Abstract ... / Description: The sensitivity of different sampling regimes in identifying inter-annual changes in ... monthly mean temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind ... monthly mean log-transformed wind speed α of 0.05 and P of 0.9. File: 35-Agnew.pdf ... WG-CEMP-90/19 INVESTIGATIONS OF REQUIRED SAMPLING ... REGIMES FOR ENVIRONMENTAL PARAMETERS D.J. Agnew* Abstract The sensitivity of different sampling ... significance a of 0.05 and a power P of 0.8. Sampling wind speed continuously or as daily maxima and minima ... would be sufficient to detect a 10 to 20% change in monthly mean log-transformed wind speed a of 0.05 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Autor(es): Agnew, D.J.
-
Chilean krill fishery: analysis of the 1991 season
Paper Title: Chilean krill fishery: analysis of the 1991 season Abstract / Description: This ... paper summarises Chilean catch data for 1991. Special emphasis is given to the analysis of haul-by-haul ... data and its use in studying small-scale spatial distribution of catches. The results show that krill ... fishing in Subarea 48.1 is particularly intense near CEMP sites. Other ways of using of haul-by-haul data ... WG-KRILL-9l/39 CHILEAN KRILL FISHERY: ANALYSIS OF THE ... This paper summarises Chilean catch data for 1991. Special emphasis is given to the analysis of haul ... -by-haul data and its use in studying small-scale spatial distribution of catches. The results show ... that laill fishing in Subarea 48.1 is particularly intense near CEMP sites. Other ways of using of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 273–287 : Autor(es): Marín, V.H., A. Mujica and P. Eberhard
-
Research currently being undertaken by the Republic of South Africa on "dependent and related species" within the Antarctic marine ecosystem
Paper Title: Research currently being undertaken by the Republic of South Africa on " ... components of the biological sciences programme are described. The primary objective of the studies being ... undertaken is to improve our understanding of the ecology of important predators (especially seals and ... --CAMLR-IV/BG/2 1985 RESEARCH CURRENTLY BEING UNDERTAKEN BY THE REPUBLIC OF SOUTH AFRICA ON "DEPENDENT ... AND RELATED SPECIES" WITHIN THE ANTARCTIC MARINE ECOSYSTEM Abstract Selected components of the ... biological sciences programme are described. The primary objective of the sudies being undertaken is to ... improve our understanding of the ecology of important predators (especially seals and seabirds) and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 59-77 : Autor(es): South Africa
-
Biology and harvesting of Dissostichus eleginoides around the Kerguelen Islands (Division 58.5.1)
Paper Title: Biology and harvesting of Dissostichus eleginoides around the Kerguelen Islands ... species in the fisheries of the Southern Ocean. In Division 58.5.1, a directed trawl fishery has been in ... operation since 1984/85 and has expanded in the deep western sector of the Kerguelen Shelf. This fishery ... harvests the sub-adult/adult part of the stock. Fishing effort and corresponding catches are very variable ... is becoming an increasingly important species in the fisheries of the Southern Ocean. In Division ... western sector of the Kerguelen Shelf. This fishery harvests the sub-adult/adult part of the stock ... harvestable resources of ChampsocephaZus gunnari. Vital biological information on population dynamics, as ... exploitation are discussed with respect to the development of fishing methods. Resume Dissostichus ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 85–106 : Autor(es): Duhamel, G.