Résultats de la recherche
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Influence of the quality and quantity of data from a multi-year tagging program on bias and precision of biomass estimates from an integrated stock assessment – update
estimates from an integrated tag-based assessment are influenced by various aspects of a multi-year tagging ... emerged within this overall trend. The results show that in the early stages of the tagging program, a ... high tag size-overlap is imperative to maximise the likelihood of a robust assessment. Tagging fish ... with a low tag size-overlap, even with large numbers, is likely to result in overestimates of biomass ...
Meeting Document : WG-FSA-12/18 : Auteur(s): P.E. Ziegler (Australia)
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The krill maturity cycle: a conceptual description of the seasonal cycle in Antarctic krill
Abstract: A long term study on the maturity cycle of Antarctic krill was conducted in a research ... aquarium. Antarctic krill were either kept individually or in a batch for 8 months under different ... . Based on these results, and information available from previous studies, we suggest a conceptual model ... describing seasonal cycle of krill physiology which provides a framework for future studies and highlight the ...
Meeting Document : WG-EMM-06/23 : Auteur(s): S. Kawaguchi, T. Yoshida, L. Finley, P. Cramp and S. Nicol (Australia)
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The case for a Ross Sea marine reserve
Abstract: The Ross Sea continental shelf and slope have a number of characteristics that make it ... an ideal candidate for a marine reserve, as evidenced by its inclusion in the list of 11 priority ... .¹ With exceptional biodiversity and evolutionary significance, as well as its potential as a climate ... a no-take MPA encompassing the shelf and slope. Scientific information presented to CCAMLR and the ...
Meeting Document : CCAMLR-XXX/BG/23 : Auteur(s): Submitted by ASOC
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Use of a population model to assess the impact of longline fishing on wandering albatross populations
Abstract: An age-structured model of a wandering albatross Diomedea exulans population is ... Possession Island Crozets, during 1968 to 1986. The simulation results portray a population decreasing at a ... albatross mortality is presumed to have increased as a result of deaths caused by longline fishing vessels ... eleginoides in Antarctica. Assuming longline fishing operations affect juveniles more than adults, there is a ...
Meeting Document : WG-IMALF-94/08 : Auteur(s): Coleen L. Moloney, John Cooper, Peter G. Ryan and W. Roy Siegfried (South Africa)
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Influence of data quality and quantity from a multiyear tagging program on an integrated fish stock assessment
Abstract: Using a modeling framework for toothfish (Dissostichus spp.) population dynamics ... an integrated tag-based assessment are influenced by various aspects of a multiyear tagging program ... better-quality tagging data. The results showed that even when tag releases were distributed over a ... relatively large number of size classes, low recapture numbers collected in short tagging programs with a 100 ...
Meeting Document : WG-FSA-13/P03 : Auteur(s): P. Ziegler
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Using spatial population models to investigate the effects of a proposed Marine Protected Area on Antarctic toothfish in the Ross Sea region
Abstract: One aim of Marine Protected Areas (MPAs) is to protect a representative portion of ... of that fishery’s displacement on the target fish population. We used a spatially explicit population ... model of Antarctic toothfish in the Ross Sea region to investigate the effects of a proposed MPA on the ... to result in a small increase in the catch limit under existing harvest management rules, as well as ...
Meeting Document : WG-FSA-15/42 : Auteur(s): S. Mormede, A. Dunn, S.J. Parker and S.M. Hanchet (New Zealand)
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A GIS tool to assist in the planning and design of sample surveys of the abundance of colonial breeding species
Abstract: A GIS tool to assist in the planning and designing of surveys of colonial breeding ... the example the tool is used to sample a population of Adelie penguins in the Holme Bay region of East ... Antarctica as might occur in a real a pilot survey, and the resulting sample densities used to predict the ... number of sampling units required to estimate abundance for the entire region with a pre-determined ...
Meeting Document : WG-EMM-05/25 : Auteur(s): C. Southwell, R. Dreissen, S. Candy, G. McPherson and J. Clarke (Australia)
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JGYM: a java version of the Generalised Yield Model
Abstract: As part of a wider research project aimed at developing management strategies based on ... the current toothfish assessment methodology using the Generalised Yield Model (GYM), a Java version ... identical input, then this would be a major step towards a verification of the GYM. This paper, which will ... be given in the form of a Power Point presentation, will discuss how the JGYM was developed, indicate ...
Meeting Document : WG-FSA-SAM 03/16 : Auteur(s): R.N. Vilhelm (United Kingdom)
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Characterisation of the exploratory fishery on Dissostichus spp. between the 2004/05 and 2016/17 fishing seasons in Division 58.4.3.a
Abstract: Exploratory fishing in Division 58.4.3.a is conducted by two vessels using longlines ... arrangements are in place in Division 58.4.3.a (Conservation Measures 41-05 and 41-11), while data are ... collected to provide a robust stock assessment and catch limits. A research plan jointly written by France ... season 2016/17. Author(s): J.-B. Lecomte, R. Sinegre, A. Rigaud and T. Okuda Title: Characterisation of ...
Meeting Document : WG-SAM-17/20 : Auteur(s): J.-B. Lecomte, R. Sinegre, A. Rigaud and T. Okuda
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Experience with seabird by-catch limits in a trial of longline fishing in the Macquarie Island toothfish fishery
Abstract: The Australian Fisheries Management Authority (AFMA) recently granted a permit for a ... fishing vessels. The seabird bycatch mitigation measures adopted for the trial included a ban on offal ... of species with a different limit for each group. The groupings reflected the varying conservation ... conservation status and highest risk of interacting with fishing operations had a bycatch limit of one seabird ...
Meeting Document : WG-FSA-07/19 : Auteur(s): T. Hewitt and I. Hay (Australia)