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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.
allowable catch under the set of decision rules applied in these CCAMLR fisheries (Constable and de la ... classes by combining F with a fishing selectivity function, Sa, gives (see Branch, 2009a, 2009b ... that it is usual to assume that both the form and parameter values for the function for Sa do not vary across ... AS S , where there are A age-classes considered for the population (i.e. so that Sa has a mean of 1), rather ... process error in predicted catch-at-age numbers. Simulations assumed 1 000 releases per year over 12 years ... perturbation by observational error were also carried out for each model in order to investigate the effect on ... estimates with that for M. In contrast, when sigmoidally shaped selectivity was simulated, and the ... functional form of selectivity was correctly specified in the BODE model, both models gave close to unbiased ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 1–27 : Author(s): Candy, S.G.
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e-sc-xiii-a5.pdf
... (Secretariat) and M. Basson (UK), Prof. D. Butterworth (South Africa), Drs W. de la Mare (Australia ... Estimation of Krill Biomass Krill Flux in Statistical Area 48 and Other Areas 4.1 Dr de la Mare ... Africa). 1.2 The Working Group was welcomed to Cape Town by Mr G. de Villiers, the Director of Sea ... Town by Mr G. de Villiers, the Director of Sea Fisheries Administration in South Africa. REVIEW ... . Butterworth (South Africa), Drs W. de la Mare (Australia), I. Everson (UK), R. Hewitt (USA), E. Murphy ... 4.1 Dr de la Mare presented the report of the Workshop on Evaluating Krill Flux Factors (Appendix D ... Flux in Statistical Area 48 and Other Areas New Work on Acoustic Methods Review of Issues on Survey
application/pdf attached to:WG-KRILL-94
Meeting Report : WG-KRILL-94
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Évaluation de la pêche illicite dans les eaux françaises adjacentes aux îles Kerguelen et Crozet pour la saison 2003/04 (1er juillet 2003–30 juin 2004) Informations générales sur la zone 58 de la CCAMLR
substantielle par rapport à la campagne de pêche précédente. Cette évolution a été constatée dans la Zone ... Economique Exclusive (ZEE) de Kerguelen (partie de la zone 58-5-1) mais également dans celle des îles Crozet ... (partie de la sous-division 58-6). Cette tendance favorable est à mettre en relation avec le renforcement ... des moyens de contrôle, l’entrée en service d’un dispositif de surveillance par satellite, la ...
Meeting Document : CCAMLR-XXIII/BG/19 : Author(s): Délégation française
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Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground
5 40 12 9 67 10 4 59 15 8 61 6 A ge d sa m pl e si ze : 90 55 9 72 5 78 ... 9 1 R an do m sa m pl e of le ng th s m ea su re d fr om th e ca tc h. 2 N um ... be r o f t ag s r el ea se d an d re ca pt ur ed e xc lu de s t ag s f or w hi ch re ca pt ur ... B in R es id ua l V ar ia nc e Bin mean expected recaptures B in re si du al v ar ia nc e 0 20 ... in integrated assessments via CASAL for the Heard and McDonald Islands (HIMI, Division 58.5.2 ... to 2008. A large proportion of the recaptures of fish released in this fishery were aged and these ... in R, based on alternative ordinary differential equations (ODE) for within-year population dynamics ... of M have been studied using simulation. In application to the data obtained for the HIMI main trawl ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Author(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins
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A quantified Bayesian Maximum Entropy estimate of Antarctic krill abundance across the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey
d d ev ia ti on M ea n va lu e M ea n er ro r M ax . va lu e M ax . er ro r C V (% ) B io ... l’abondance du krill antarctique (Euphausia superba) dans l’ensemble de la mer du Scotia à partir des données ... de la campagne CCAMLR-2000 d’évaluation synoptique du krill de la zone 48 (campagne CCAMLR-2000) et ... de tracer la distribution de la densité du krill de toute la région couverte par la campagne. Les ... the Scotia Sea and in small-scale management units from the CCAMLR-2000 Survey Abstract / Description ... units (SSMUs), were estimated. Abundance in some of the individual SSMUs had not previously been ... estimated due to the sparseness of data in these regions. The MaxEnt formalism allows an objective choice of ... the error in the density estimates. The total biomass inferred for the survey area was 208 million ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 97–116 : Author(s): Heywood, B.G., A.S. Brierley and S.F. Gull
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Selected Scientific Papers, SC-CAMLR-SSP/3 (1986)
reproductoras de Notothenia rossii en el area de Georgia del Sur para tres va10res de la biomasa de 1985 ... OF ANTARCTIC MARINE LIVING RESOURCES COMMISSION POUR LA CONSERVATION DE LA FAUNE ET LA FLORE MARINES DE ... L'ANTARCTIQUE COMISION PARA LA CONSERVACION DE LOS RECURSOS VIVOS MARINOS ANTARTICOS KOMl1CCl15I no COXP ... texte de ces communications est reproduit dans la langue originale dans laquelle celles-ci ont ete ... meetings of the Scientific Committee and Working Groups of the Scientific Committee in 1986. Abstracts of ...
Document : Site Section: Publications
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SC-CAMLR-SSP/4
reproductoras de Notothenia rossii en el area de Georgia del Sur para tres va10res de la biomasa de 1985 ... OF ANTARCTIC MARINE LIVING RESOURCES COMMISSION POUR LA CONSERVATION DE LA FAUNE ET LA FLORE MARINES DE ... L'ANTARCTIQUE COMISION PARA LA CONSERVACION DE LOS RECURSOS VIVOS MARINOS ANTARTICOS KOMl1CCl15I no COXP ... texte de ces communications est reproduit dans la langue originale dans laquelle celles-ci ont ete ...
Document : Site Section: Publications
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Rapport sur l’evaluation et la prevention de la mortalite accidentelle dans la zone de la convention 1994/95
Author(s): France Title: Rapport sur l’evaluation et la prevention de la mortalite accidentelle ... dans la zone de la convention 1994/95 Approval: Approved Secretariat Workflow Status: Content ...
Meeting Document : CCAMLR-XIV/BG/13 : Author(s): France
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Aplicación en Chile de la Medida de Conservación 170/XVIII de la CCRVMA
Author(s): Delegación de Chile Title: Aplicación en Chile de la Medida de Conservación 170/XVIII ... de la CCRVMA Approval: Approved ... Aplicación en Chile de la Medida de Conservación 170/XVIII de la CCRVMA ... Delegación de Chile ...
Meeting Document : CCAMLR-XIX/BG/16 : Author(s): Delegación de Chile
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Possible effects of different levels of krill fishing on predators – some initial modelling attempts
possibles de la p@che de krill sur les predateurs, les auteurs tentent d'etablir une premiPre structure de ... base de la modelisation, comme cela avait ete suggere pendant la reunion conjointe du Groupe de ... travail sur le krill (WG-Krill) de la CCAMLR et du Groupe de travail charge du Programme de contr6le de ... l'kcosysteme de la CCAMLR (WG-CEMP) en 1992. Tout d'abord, les auteurs ~ roceden t a des estimations des ... CCAMLR Ecosystem Monitoring Program (WG-CEMP) in 1992, in order to investigate the possible effects of ... krill predator species. A 'one-way' interaction model is developed, in which krill abundance ... that variability in the annual recruitment of krill results in predator populations being less ... some krill predator populations, and on the possibility of biases in their estimation. These matters ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 79–97 : Author(s): Butterworth, D.S. and R.B. Thomson