Résultats de la recherche
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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)
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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)
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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
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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)
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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)
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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)
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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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A brief review of information relevant to the establishment of a Krill Research Zone within the proposed Ross Sea Region Marine Protected Area
Resources meeting in 2015, New Zealand and the United States introduced a revision to the proposed Ross Sea ... Region Marine Protected Area (RSRMPA) that included the addition of a Krill Research Zone (KRZ). A ... central aim of the proposed KRZ is to enhance research opportunities within the RSRMPA. To provide a ... , focusing primarily on krill and krill-dependent predators. Here we provide a summary of that review, which ...
Meeting Document : WG-EMM-16/49 : Auteur(s): E.S. Klein and G.M. Watters
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A nonparametric algorithm to model movement between polygon subdomains in a spatially explicit ecosystem model
part of the modelling effort. In marine applications, a flow field grid describing the water movement ... large computational costs and difficult communication between model layers. In this paper, a simple and ... biomass distribution in comparison to a grid-scale model. A nonparametric description of inter-polygon ... both in artificial and realistic scenarios. Author(s): T. Lenser and A. Constable (Australia) Title ...
Meeting Document : WG-EMM-06/35 : Auteur(s): T. Lenser and A. Constable (Australia)
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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
estimate (by means of a survey) on statistical characteristics of fish concentration density field under ... methods of calculus of probabilities; biomass estimate is determined as a product of average density for ... a posteriori estimation of error made when calculating biomass, and for survey planning on the basis ... of a priori estimates of statistical characteristics of concentration density field. They might make ...
Meeting Document : SC-CAMLR-VI/BG/39 : Auteur(s): Z.I. Kizner (USSR)