Résultats de la recherche

1. ASPECTS OF POPULATION STRUCTURE, DYNAMICS, AND DEMOGRAPHY OF RELEVANCE TO ABUNDANCE ESTIMATION: ADÉLIE PENGUINS

   proportion of each category either at the breeding site or at sea may potentially differ. Author(s):  L ... breeding sites during the breeding season. The objective of this paper is to identify and describe the ... interpretation of counts made at breeding sites and the estimation of overall population abundance derived from ... aspects of Adélie penguin population structure, dynamics and demography that are relevant to the ...

   Meeting Document : WG-EMM-PSW-08/09 : Auteur(s): L. Emmerson and C. Southwell (Australia)

2. Modelling availability bias using existing time series count data: Adélie penguins as a case study

   sites in Antarctica during the breeding season are influenced by the date at which they are undertaken ... of sites and years around Antarctica were modelled using quantile regression to estimate the range of ... . A count of some attribute of the population on any date may therefore need to be adjusted by some ... date-specific factor (termed the availability fraction) if the count is to form the basis of an ...

   Meeting Document : WG-EMM-04/54 : Auteur(s): L. Emmerson, B. Raymond and C. Southwell (Australia)

3. Trophic study of Ross Sea Antarctic toothfish (Dissostichus mawsoni) using carbon and nitrogen stable isotopes

   and Terra Nova Bay Trench. In contrast, all of the four potential prey species caught in the Northern ... and 88.1J) during two fishing seasons 2005/6 and 2006/7. The species sampled were: 6 fish: Antarctic ... glacialis (Gg, n=3), Kondakovia longimana (Kl, n=20), Psychroteuthis glacialis (Pg, n=20) and the Colossal ... ), Octopodid sp. 2 (Oct-2, n=5) and Cirroctopus glacialis (Cg, n=9). Length and SSRU were the most significant ...

   Meeting Document : WG-EMM-08/27 : Auteur(s): S.J. Bury, M.H. Pinkerton, D.R. Thompson, S. Hanchet, J. Brown and I. Vorster (New Zealand)

4. Monitoring Antarctic environmental variables using penguins

   100 m of the water column was highest in the western section of the Bay which concurred with higher ... biotic features of the environment can be studied using animals to transport probes to the study site ... Abstract:  Water temperature and krill abundance in Maxwell Bay, Antarctica, were examined using ... trips from 49 penguins indicated that during December 1991 and January 1992 the temperature in the top ...

   Meeting Document : WG-CEMP-94/27 : Auteur(s): R.P. Wilson, B.M. Culik and R. Bannasch (Germany) and J. Lage (France)

5. SEASONAL ESTIMATION OF ABUNDANCE BY BOOTSTRAPPING INEXACT RESEARCH DATA (SEABIRD): A METHOD FOR ASSESSING ABUNDANCE AND UNCERTAINTY FROM HISTORICAL COUNT DATA USING ADELIE PENGUINS AS A CASE STUDY

   of that kind. The present study attempts to implement this estimator in the form of a parametric ... the R language for statistical computing (R Development Core Team 2008). Software is reliant on data ... this kind are accommodated, such as availability and perception bias, as well as many of the vagaries ... to a common reference point of breeding chronology. Equally important was the idea that estimates of ...

   Meeting Document : WG-EMM-PSW-08/11 : Auteur(s): J.P. McKinlay and C.J. Southwell (Australia)

6. Pup production and distribution of breeding Antarctic fur seals (Arctocephalus gazella) at South Georgia

   sites were used to estimate the pup production of the population had 1990/91 been a typical year. Based ... Abstract:  A census of the breeding population of Antarctic fur seals (Arctocephalus gazella) at ... South Georgia was carried out during the 1990/91 breeding season. Using counts of adult females ashore ... at the breeding grounds during the pupping period, together with corrections for the likelihood of a ...

   Meeting Document : WG-CEMP-92/39 : Auteur(s): I.L. Boyd (United Kingdom)

7. Connectivity and population structure in Pleuragramma antarcticum

   populations: i) in the Ross Sea, ii) on the southern Antarctic Peninsula in Marguerite Bay and off Charcot ... suggested fish from Marguerite Bay may be advected along the southern Peninsula to Charcot Island by the ... silverfish (Pleuragramma antarcticum) are distributed in independent, discrete populations in the Ross Sea ... , over the West Antarctic Peninsula, and around the South Orkneys; or whether the Southern Ocean ...

   Meeting Document : WG-FSA-11/19 : Auteur(s): J. Ferguson, J. Ashford, A. Piñones, J. Torres, W. Fraser, C. Jones (USA) and M. Pinkerton (New Zealand)

8. Australian research on Antarctic bird and seal diets

   Abstract:  Many data on the diets of important vertebrate predator species in Prydz Bay and around ... Bay, on which is centered the CCAMLR Ecosystem Monitoring Programme's priority study area ... the sub-Antarctic Heard and Macquarie Islands have been collected during the last seven years ... , Euphausia superba forms a rather low proportion of the diet of most vertebrate predators. Euphausia ...

   Meeting Document : SC-CAMLR-VII/BG/32 : Auteur(s): Delegation of Australia

9. MITIGATION OF SEABIRD CAPTURES DURING HAULING IN CCAMLR LONGLINE FISHERIES

   performance of bird exclusion devices (BED) placed around the hauling bay. Observer data collected since 2003 ... “jumping” into the area around the hauling bay. Data collected since 2003 are used to classify BEDs into ... CCAMLR as a problem as early as 1994/95 when steps were taken to reduce the attraction of birds to ... vessels during the hauling process.  Since 2003 increased efforts have been made to improve the design and ...

   Meeting Document : WG-IMAF-09/14 : Auteur(s): E. Reid, B. Sullivan (BirdLife International), K. Reid (Secretariat) and J. Clark (United Kingdom)

10. DRAFT SOFTWARE USER GUIDE FOR: ICESCAPE: INTEGRATING COUNT EFFORT BY SEASONALLY CORRECTING ANIMAL POPULATION ESTIMATES

    Abstract:  The ICESCAPE Software Users Guide (Appendix 1) describes a parametric bootstrap ... (Davison and Hinkley 1997) model for implementing the general abundance estimator proposed by Southwell ... (2004) for Antarctic land-breeding predators. The software, which was developed as a suite of routines ... in the R language for statistical computing (R Development Core Team 2008), aims to adjust raw count ...

    Meeting Document : WG-SAM-09/16 : Auteur(s): J. McKinlay, C. Southwell and R. Trebilco (Australia)

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