Resultados de la búsqueda
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Are krill recruitment indices from meso-scale survey representative for larger areas?
) and two-year old (R2) krill differ substantially between years. However, results were in conformity ... recruitment indices derived from these two mesoscale surveys and analyse whether results from mesoscale ... surveys are representative for a wider region Generally the proportional recruitment indices for one (R1 ... for age-one-old krill between scientific surveys from the northern Bellingshausen Sea, the Elephant ...
Meeting Document : WG-EMM-02/20 : Autor(es): V. Siegel (Germany), R.M. Ross and L.B. Quetin (USA)
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LENGTH-BASED ASSESSMENT FOR THE MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) IN SUB-AREA 48.3
numbers forward under the given harvest control rule to set a two-year TAC. One issue is the accurate ... then used to estimate the two-year TAC, given the relevant harvest control rule. Author(s): R.M ... Abstract: The current assessment method for the mackerel icefish (Champsocephalus gunnari) in sub ... data, yield an estimate of the population numbers-at-length. A length-based population projection is ...
Meeting Document : WG-SAM-09/15 : Autor(es): R.M. Hillary, D.J. Agnew and R. Mitchell (United Kingdom)
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Review of some assumptions for modelling Patagonian toothfish dynamics at CCAMLR Subarea 48.3
Abstract: During the year 2005 meeting of the WG-FSA two different methods for assessing ... cases were similar, there were considerable differences in assumptions and implementations of the two ... . Author(s): A. Aubone, P.A. Martínez and O.C. Wöhler (Argentina) Title: Review of some assumptions for ...
Meeting Document : WG-FSA-SAM-06/13 : Autor(es): A. Aubone, P.A. Martínez and O.C. Wöhler (Argentina)
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A summary of the commercial fishery for mackerel icefish Champsocephalus gunnari in Subarea 48.3 during the 1997/98 season
, fished commercially for mackerel icefish at South Georgia (Subarea 48.3) using a midwater trawl for ten ... hauls. 67% of this catch was taken in just two hauls, confirming the patchy distribution of this species ... . Most of the catch was made up of fish between 22 and 30 cm long. Fish of this size range have ... previously been shown to be ages two and three. The catch of species other than C. gunnari amounted to only ...
Meeting Document : WG-FSA-98/53 : Autor(es): G. Parkes, A. King and C. Jones (United Kingdom)
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Continuation in the 2014/15 season of the research plan initiated in 2012/13 for stocks of Dissostichus spp. in Divisions 58.4.1 and 58.4.2
Abstract: In the 2012/13 fishing season Spain began implementing a multi-annual Research Plan for ... Divisions 58.4.1 and 58.4.2 in order to estimate local biomass of Dissostichus spp. by means of two methods ... : depletion and tagging. This research will continue in the 2014/15 season if ice conditions allow for the ... (58.4.1H, G, D and C). Two research surveys have been already implemented in Division 58.4.1 and ...
Meeting Document : WG-SAM-14/09 : Autor(es): Delegation of Spain
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Alternative assessment methods for toothfish at South Georgia
Abstract: We examine two alternatives to the survey recruitment/GY method for estimating ... toothfish abundance. An age structured production model (ASPM) is constructed and tuned to the CPUE series ... CPUE that actually has been seen since 1996. Fitting the model to partial CPUE series, or assuming an ... usefulness of tagging data to estimate population size. We use two equations, the Jolly-Seber unbiased method ...
Meeting Document : WG-FSA-SAM-04/17 : Autor(es): Kirkwood, G., Payne, A., Agnew, D.
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Continuation in the 2015/16 season of the research plan initiated in 2012/13 for stocks of Dissostichus spp. in Divisions 58.4.1 and 58.4.2
Abstract: In the 2012/13 fishing season Spain began implementing a multi-annual Research Plan for ... Divisions 58.4.1 and 58.4.2 in order to estimate local biomass of Dissostichus spp. by means of two methods ... recovery, as well as, to progress research in these SSRUs (58.4.1H, G, D and C). Two research surveys have ... : Continuation in the 2015/16 season of the research plan initiated in 2012/13 for stocks of Dissostichus spp. in ...
Meeting Document : WG-SAM-15/02 : Autor(es): Delegation of Spain
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Improvements to the multiple-frequency method for in situ target strength measurements
transducer. Tolerances for matching target positions at two or more frequencies were determined to be ±0.5 m ... synchronized signals from two or more adjacent split-beam transducers of different frequencies which are not ... for in situ target strength measurements Approval: Approved ...
Meeting Document : WG-EMM-99/38 : Autor(es): D.A. Demer (USA) and M.A. Soule (South Africa)
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Acoustic data for the 1994 Krill Flux Workshop
a section given an oceanographic dataset of current direction and speed. The two programs produce ... Abstract: A methodology is described which when applied to data from an acoustic survey will ... yield mean krill density along an arbitrary section through the survey area, giving results compatible ... : Acoustic data for the 1994 Krill Flux Workshop Approval: Approved ...
Meeting Document : WS-Flux-94/04 : Autor(es): Secretariat
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Results of the tagging experiment for D. eleginoides in Subarea 48.4
Abstract: Two vessels, the Argos Helena (UK) and the San Aspiring (New Zealand), fished around ... 2005 to assess the toothfish population. We present an analysis of the catch and tagging data and a ... proposal for continuing research in this area in 2007. Author(s): A. Payne and D.J. Agnew (United Kingdom ... ) Title: Results of the tagging experiment for D. eleginoides in Subarea 48.4 Approval: Approved ...
Meeting Document : WG-FSA-06/56 : Autor(es): A. Payne and D.J. Agnew (United Kingdom)