Résultats de la recherche
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Estimation of natural mortality using catch-at-age and aged mark-recapture data: a multi-cohort simulation study comparing estimation for a model based on the Baranov equations versus a new mortality equation.
Paper Title: Estimation of natural mortality using catch-at-age and aged mark-recapture data: a ... multi-cohort simulation study comparing estimation for a model based on the Baranov equations versus a ... applied. Two alternative estimation models were developed both using a Poisson likelihood for annual ... ; constant catch ODE (CCODE) model uses a new total mortality ODE with constant within-year catch per unit ... -rECapturE data: a multi-Cohort simulation study Comparing Estimation for a modEl BasEd on thE Baranov ... Equations vErsus a nEw mortality Equation S.G. Candy Australian Antarctic Division Department of ... applied. Two alternative estimation models were developed both using a Poisson likelihood for annual ... (CCODE) model uses a new total mortality ODE with constant within-year catch per unit time and does not ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Auteur(s): Candy, S.G.
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
(ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a ... case study Abstract / Description: This work describes a parametric bootstrap model for standardising ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... Population Estimates) is a suite of routines that implements a general abundance estimator accounting for ... IntegratIng Count effort by SeaSonally CorreCtIng anImal PoPulatIon eStImateS (ICeSCaPe): a method for ... eStImatIng abundanCe and ItS unCertaInty from Count data uSIng adélIe PenguInS aS a CaSe Study J. McKinlay ... , BC V5A 1S6 Canada Abstract This work describes a parametric bootstrap model for standardising ... animal count data to a common reference point of breeding chronology for species with a complex temporal ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Auteur(s): McKinlay, J., C. Southwell and R. Trebilco
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A review of the effectiveness of streamer lines as a seabird by-catch mitigation technique in longline fisheries and CCAMLR streamer line requirements
Paper Title: A review of the effectiveness of streamer lines as a seabird by-catch mitigation ... technique in longline fisheries and CCAMLR streamer line requirements Abstract / Description: Based to a ... light of a review of existing literature and available data on the effectiveness of single and paired ... is lacking and is identified as a high priority. Future streamer line research should compare the ... (2004): 189–201 189 A REVIEW OF THE EFFECTIVENESS OF STREAMER LINES AS A SEABIRD BY-CATCH MITIGATION ... Antarctic Division Channel Highway, Kingston 7050 Tasmania, Australia Abstract Based to a large degree on ... requirements (Conservation Measure 25-02 (2002), formerly Conservation Measure 29/XIX) in light of a review of ... identifi ed as a high priority. Future streamer line research should compare the attack or dive rate of ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 189–201 : Auteur(s): Melvin, E.F., B. Sullivan, G. Robertson and B. Wienecke
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The error of the biomass estimate as a function of survey parameters and the statistics of a density field of krill aggregations
Paper Title: The error of the biomass estimate as a function of survey parameters and the ... statistics of a density field of krill aggregations Abstract / Description: Simple relationships expressing ... the dependence of relative sampling error in a biomass estimate (from a survey) on the statistical ... this region. For a hydroacoustic survey, the anisotropy parameters correlation radius along transects ... ESTIMATE AS A FUNCTION OF SURVEY PARAMETERS AND THE STATISTICS OF A DENSITY FIELD OF KRILL AGGREGATIONS ... error in a biomass estimate (from a survey) on the statistical characteristics of the fish ... product of the average density for the region under examination and the area of this region. For a ... parameters. The relationships described here can be used in practice for both a posteriori estimation of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 213-228 : Auteur(s): Kizner, Z.I.
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Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
a fixed fraction of the estimate of krill biomass from a survey Abstract / Description: Butterworth ... relate potential krill yield to a pre-exploitation survey estimate of krill biomass. In this paper, the ... over the ranges of uncertainty for a number of model parameters. Results are provided for the ... ), as a function of the fraction of the biomass estimate which is set as the catch for a 20-year period ... THE CONSEQUENCES OF SETTING THE ANNUAL KRILL CATCH LIMIT TO A FIXED FRACTION OF THE ESTIMATE OF ... KRILL BIOMASS FROM A SURVEY D.S. Butterworth, G.R. Gluckman, R.B. Thomson and S. Chalis Department of ... Hobart, Tasmania 7000, Australia Abstract Butterworth et a l . (1992) put forward an extension of ... the harvesting model of Beddington and Cooke (1983) to relate potential krill yield to a pre ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Auteur(s): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew
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Midwater trawl catchability as an aspect of a quantitative assessment of krill biomass conducted using a trawl census survey
Paper Title: Midwater trawl catchability as an aspect of a quantitative assessment of krill ... biomass conducted using a trawl census survey Abstract / Description: Midwater trawl catchability is a ... catchability and krill distribution patterns. A comparative analysis of trawl catchability for commercial ... high relative error. A standard method for conducting krill trawl census surveys needs to be developed ... OF A QUANTIT ATIVE ASSESSMENT OF KRILL BIOMASS CONDUCTED USING A TRAWL CENSUS SURVEY S.M ... . Kasatkina* Abstract Midwater trawl catchability is a variable which depends on both the behavioural and ... will improve with better knowledge of trawl catch ability and krill distribution patterns. A ... because the biomass estimates thus obtained were characterised by high relative error. A standard method ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 257–272 : Auteur(s): Kasatkina, S.M.
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A generalised model for evaluating yield and the long-term status of fish stocks under conditions of uncertainty
Paper Title: A generalised model for evaluating yield and the long-term status of fish stocks ... under conditions of uncertainty Abstract / Description: This paper presents a general fish stock ... the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ... probability that the spawning biomass will become depleted to below some specified level over a specified ... CCAMLR Science, Vol. 3 (1996): 31-54 A GENERALISED ... Channel Highway, Kingston 7050 Tasmania, Australia Abstract This paper presents a general fish stock ... the spawning stock biomass in accordance with CCAMLR criteria. These specify a bound on the ... probability that the spawning biomass will become depleted to below some specified level over a specified ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 31–54 : Auteur(s): Constable, A. and W.K. de la Mare
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A proposed management procedure for the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity
Paper Title: A proposed management procedure for the toothfish (Dissostichus eleginoides ... abundance. A Management Procedure (MP) approach is proposed to provide a sound scientific basis to recommend ... ‘Optimistic’, ‘Intermediate’, ‘Less Pessimistic’ and a ‘Pessimistic’ current status for the resource are ... are used for trials of a candidate generic MP which could provide future TAC recommendations for this ... CCAMLR Science, Vol. 16 (2009): 33–69 33 A PROPOSED ... VICINITY A. Brandão and D.S. Butterworth MARAM (Marine Resource Assessment and Management Group ... information indicates that past catches have had relatively little impact on abundance. A Management ... Procedure (MP) approach is proposed to provide a sound scientific basis to recommend future TACs in the ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 33–69 : Auteur(s): Brandão, A. and D.S. Butterworth
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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 ... difference between the real mean characteristic for a sex, and the apparent mean derived by sexing the birds ... 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 ... normal distributions are used to show that there is a difference between the real mean characteristic ... for a sex, and the apparent mean derived by sexing the birds using discriminant analysis. When ...
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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A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands
Paper Title: A declining trend in the abundance of Notothenia rossii marmorata and Notothenia ... gibberifrons observed in fjords in two sites in the South Shetland Islands Abstract / Description: A declining ... two sites in the South Shetland Islands (Subarea 48.1), is analyzed by a nested ANOVA and demonstrated ... , King George/25 de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half ... WG-FSA-90/14 A DECLINING TREND IN THE ABUNDANCE OF ... SHETLAND ISLANDS E. Barrera-Oro and E. Marschofr Abstract A declining trend observed in the abundance ... Shetland Islands (Subarea 48.1), is analyzed by a nested ANOVA and demonstrated as significant. The ... ., over a period of eight years from 1983 to 1990 and in waters around Half-Moon 1., Moon Bay, in 1989 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Auteur(s): Barrera-Oro, E. and E. Marschoff