Search results
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WG-KRILL-90
Size composition in Euphausia superba’s males and females in the course of life cycle R.R. Makarov ... WG-KRILL-90/11 Rev1 Homogeneity of body length composition of Antarctic krill within the commercial ... management measures for krill W.K. de la Mare (Australia) WG-KRILL-90/15 Comments on the calculation of the ... composite index of krill abundance V.A. Spiridonov (USSR) WG-KRILL-90/16 The distribution pattern and ...
Meeting
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IN SITU MEASUREMENTS OF TILT ANGLE DISTRIBUTION AND TARGET STRENGTH IN ANTARCTIC KRILL (EUPHAUSIA SUPERBA)
Abstract: Knowledge of the scattering properties of Antarctic krill (Euphausia superba) is ... crucial for biomass estimates of the species, but in situ investigations regarding this are still very ... scarce. We conducted a field study in the Southern Ocean where one of the objectives was to acquire data ... on orientation angles and target strength of Antarctic krill. The main investigations were done off ...
Meeting Document : WG-EMM-08/29 : Author(s): G. Skaret, S.A. Iversen, T. Knutsen, R.J. Korneliussen, E. Ona, R. Pedersen, A. Totland, T. Torkelsen (Norway) and X. Zhao (China)
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Revised selectivities for Dissostichus eleginoides taken by longliners in Subarea 48.3
selectivity curves for toothfish taken by longliners around South Georgia and Shag Rocks over the period 1995 ... selectivities for the years 1995 – 2000 for input to the GYM assessment. In this paper, I propose a revised ... method for estimating the selectivities based on an assumption that the proportions of the total CPUE in ... . This removes some of the ad hoc nature of the former estimation method. The method is illustrated by ...
Meeting Document : WG-FSA-02/64 : Author(s): G.P. Kirkwood (United Kingdom)
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Leslie analyses of commercial snow crab trap data: a comparative study of catchability coefficients
Abstract: If we could determine the relationship between catch rates in a trap survey and ... absolute population size, then we could estimate the standing stock of snow crabs before the fishing season ... from a survey conducted with traps. One way to calibrate the catch rates is to examine available ... historical Leslie analyses of commercial catch data obtained over several years and quantify the relationship ...
Meeting Document : WS-CRAB-93/13 : Author(s): J.M. Hoenig, E.G. Dawe, D.M. Taylor, M. Eagles and J. Tremblay (USA)
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Effect of missing modes on calibration sphere target strengths (ICES CM 1996/b: 37, Fish Capture Committee)
used in the calibration of echo sounder systems, can be affected by the manner of suspension. This ... hypothesis is investigated in the context of reported experimental calibration trials with the SIMRAD EK500 ... tungsten carbide with 6% cobalt binder. Theoretical target strengths are computed for each sphere for the ... reported measurement conditions for a series of cases in which single vibration modes remain unexcited. The ...
Meeting Document : WG-EMM-96/46 : Author(s): Foote, K.G.
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A fish stock assessment survey design for Subarea 48.1
Abstract: There is a lack of information regarding the abundance of exploitable finfish in ... the Working Group on Fish Stock Assessment to assess the stocks in this region and assist the ... Scientific Committee in giving management advice to the Commission. A stratified random survey is proposed ... ; the strata correspond to depth ranges (stratum 1: 50-150 m; stratum 2: 151-250 m; stratum 3: 251-500 m ...
Meeting Document : WG-FSA-92/07 : Author(s): G. Watters (USA)
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Application of continuous time Markov chains to modelling animal movement: estimation of movement rates and retention times for Patagonian toothfish
Abstract: The study of animal movement and distribution has been a central focus in ecology since ... the inception of the science. However, continuous-time, discrete state models have received relatively ... , including an inferential framework which can accommodate heterogeneous sampling effort. We explore the ... apply the model to estimate the equilibrium distribution of Patagonian toothfish in the region around ...
Meeting Document : WG-FSA-SAM-06/16 : Author(s): C. Wilcox, M. Bravington and D. Peel (Australia)
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Using vessel acoustics to detect diving patterns of krill foraging predators automatically: Development of a novel method for quantifying impact of krill fishing on seals and penguins
Abstract: The aim of this work was to assess the possibilities of automatically generating a ... of diving predators in the data is feasible. A relatively low detection probability of our algorithms ... compared to the manual detections, suggest that there is significant room for improvement. Given the ... caveats of an imperfect methodology, the results document the possibilities to automatically extract, with ...
Meeting Document : WG-EMM-15/25 : Author(s): T.A. Klevjer, O.R. Godø and B. Krafft (Norway)
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Reflection Paper on a Proposal for a CCAMLR Weddell Sea Marine Protected Area (WSMPA)
Members on a proposal for the establishment of a marine protected area in the Weddell Sea (Weddell Sea ... Marine Protected Area, WSMPA). Intersessional discussions have revealed the need for further reflection ... submitted to the CCAMLR's Commission and Scientific Committee for decision. To his end, the aim of the ... current paper is to obtain advice from CCAMLR Members on some relevant matters highlighted in the paper ...
Meeting Document : CCAMLR-XXXIV/BG/37 : Author(s): Delegation of the European Union and its Member States
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Domain 1 Marine Protected Area Preliminary Proposal – PART B: Conservation objectives
Abstract: This report summarizes the results of a series of international workshops specifically ... develop to assist in the Domain 1 MPA planning process, including the 2012- First International Workshop ... held in Valparaiso, Chile, (WG-EMM 12/69); the 2013 – Binational Workshop (Chile-Argentina) held in La ... Serena, Chile (WG-EMM 14/40), the 2015- Second International Workshop for identifying Marine Protected ...
Meeting Document : WG-EMM-17/24 : Author(s): Delegations of Argentina and Chile