Résultats de la recherche

1. 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

   Abstract:  The results of Butterworth et al. (1991) relating potential krill yield to a pre ... on Krill. The most important of these extensions is integration over the ranges of uncertainty for a ... below various fractions of its median pre-exploitation level, as a function of the fraction of the ... biomass estimate which is set as the catch for a 20-year period. Three alternative fishing seasons are ...

   Meeting Document : WG-KRILL-92/04 : Auteur(s): D.S. Butterworth, G.R. Gluckman and S. Chalis (South Africa)

2. A compilation of parameters for a krill–fishery–predator model of the Scotia Sea and Antarctic Peninsula

   model developed by Watters et al. (2006), which we use to define the required parameters. However, these ... averages to derive “generic” parameters from multiple species in a taxonomic group, and the derivation of ... . Hinke and G. Watters (USA) Title:  A compilation of parameters for a krill–fishery–predator model of the ...

   Meeting Document : WG-EMM-06/30 Rev. 1 : Auteur(s): S. Hill, K. Reid, S. Thorpe (United Kingdom), J. Hinke and G. Watters (USA)

3. 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

   accounting for availability bias, detection bias, and sampling fractions less than unity (Pollock et al. 2004 ... Abstract:  This work describes a parametric bootstrap model (Davison and Hinkley 1997) for ... standardising animal count data to a common reference point of breeding chronological for species showing ... Animal Population Estimates) is suite of routines that implements a general abundance estimator ...

   Meeting Document : WG-EMM-09/20 : Auteur(s): J. McKinlay, C. Southwell and R. Trebilco (Australia)

4. CONDITIONING SMOM USING THE AGREED CALENDAR OF OBSERVED CHANGES IN PREDATOR AND KRILL ABUNDANCE: A FURTHER STEP IN THE DEVELOPMENT OF A MANAGEMENT PROCEDURE FOR KRILL FISHERIES IN AREA 48

   Abstract:  The updated version of the Spatial Multi-species Operating Model (SMOM) of krill ... observed changes in predator abundance. The main method of conditioning involved estimating a shape ... conditioned operating models presented here constitute a further step towards the development of a spatially ... KRILL ABUNDANCE: A FURTHER STEP IN THE DEVELOPMENT OF A MANAGEMENT PROCEDURE FOR KRILL FISHERIES IN AREA ...

   Meeting Document : WG-EMM-08/44 : Auteur(s): É.E. Plagányi and D.S. Butterworth (South Africa)

5. A RISK ASSESSMENT TO ADVISE ON STRATEGIES FOR SUBDIVIDING A PRECAUTIONARY CATCH LIMIT AMONG SMALL-SCALE MANAGEMENT UNITS DURING STAGE 1 OF THE STAGED DEVELOPMENT OF THE KRILL FISHERY IN SUBAREAS 48.1, 48.2, AND 48.3.

   Abstract:  We used Foosa and the reference set of parameterizations developed by Watters et al ... move, to a lesser extent than Fishing Option 2. Up to harvest rates defining the current trigger level ... in a few coastal SSMUs, implementing this option would increase the risks that predator populations ... , in a few SSMUs, such risks even occur at harvest rates near the rate defining the current trigger ...

   Meeting Document : WG-EMM-08/30 : Auteur(s): G.M. Watters, J.T. Hinke (USA) and S. Hill (United Kingdom)

6. A proposal for a research plan for the exploratory longline fishery for Dissostichus spp. in 2013/14 in Division 58.4.3a

   Abstract:  In 2011/2012, a French vessel conducted its first exploratory fishery for Dissostichus ... spp. in division 58.4.3a. A new campaign is scheduled for 2013. France has also notified its intention ... to participate in this exploratory fishery over the next three years in order to achieve a robust ... paper aims to present a research plan for 2013/2014 that takes into account the remarks made during the ...

   Meeting Document : WG-FSA-13/04 : Auteur(s): A. Rélot-Stirnemann - Submitted on behalf of France

7. 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

   Abstract:  In addition to a review of published studies on Adelie penguin abundance at breeding ... sites in Antarctica, Southwell (2004) proposed a general abundance estimator appropriate for a species ... of that kind. The present study attempts to implement this estimator in the form of a parametric ... uncertainty at breeding sites in Antarctica. To achieve this task, a menu-driven suite of routines titled ...

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

8. A sensitivity analysis of a simple krill individual-based model designed to investigate length-based recruitment indices

   LFDs: growth, mortality and recruitment. Understanding how these processes interact is a prerequisite ... to the interpretation of any observed trend. To illustrate these interactions a simple mechanistic ... individual-based model of krill population dynamics was subjected to a sensitivity analysis. Starting from a ... , since the population size structure at a given time is the result of a mixture of several annual cohorts ...

   Meeting Document : WG-EMM-13/23 : Auteur(s): S. Thanassekos and K. Reid (Secretariat)

9. Developing and applying a general abundance estimator for land-based predator surveys: Adélie penguins as a case study

   Abstract:  The development of a general estimator of abundance would facilitate a standardised ... approach to regional and circum-Antarctic surveys of land-based predators. Such a generalised estimator is ... abundance of Adélie penguins at regional scales in Antarctica, given a range of logistical scenarios and ... related survey designs. Author(s):  C. Southwell (Australia) Title:  Developing and applying a general ...

   Meeting Document : WG-EMM-04/56 : Auteur(s): C. Southwell (Australia)

10. A revised estimate of short-term yield for the mackerel icefish (Champsocephalus gunnari) off Heard Island based on a trawl survey in 1998

    Abstract:  A random stratified trawl survey of Mackerel icefish in 2 populations (Plateau and ... Shell Bank) in the vicinity of Heard Island enabled a revised estimate of yield for the coming 2 seasons ... cohorts are still sufficiently strong to provide for a yield greater than estimates of the long term ... estimate of a long term precautionary level and be maintained thereafter unless a further survey again ...

    Meeting Document : WG-FSA-98/54 : Auteur(s): A. Constable and D. Williams (Australia)

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