Browsing Brage IMR by Author "Stefánsson, Gunnar"

Now showing items 1-6 of 6

    • Cannibalism and year-class strength in Atlantic cod (Gadus morhua L.) in Arcto-boreal ecosystems (Barents Sea, Iceland, and eastern Newfoundland) 

      Bogstad, Bjarte; Lilly, George R.; Mehl, Sigbjørn; Palsson, Olafur K.; Stefánsson, Gunnar (ICES Marine Science Symposia, Journal article; Peer reviewed, 1994)
      Stomach content data collected from cod caught during offshore resource assessment surveys in three Arcto-boreal ecosystems (the Barents Sea and the shelves off Iceland and eastern Newfoundland) were examined to determine ...

    • Comparison of Uncertainty Estimates in the Short Term Using Real Data 

      Gavaris, S.; Patterson, K. R.; Lewy, P.; Mesnil, Benoit; Punt, A. E.; Cook, R. M.; Kell, Laurence T.; O’Brien, C. M.; Restrepo, V. R.; Skagen, Dankert W.; Stefánsson, Gunnar (ICES CM documents, Working paper, 2000)
      In response to increased interest in the Precautionary Approach, various approaches have been applied to characterize the uncertainty of fisheries assessment projection results. Using three case studies, a comparison of ...

    • Definition of the problem of estimating fish abundance over an area from acoustic line-transect measurements of density 

      Foote, Kenneth G.; Stefánsson, Gunnar (ICES CM Documents;1990/D:25, Working paper, 1990)
      The problem of acoustic abundance estimation is briefly reviewed. Under proper conditions, fish density can be measured with high accuracy along line transects. Observed variations in fish density consequently reflect ...

    • Do Different Methods Provide Accurate Probability Statements in the Short Term? 

      Restrepo, V. R.; Patterson, K. R.; Darby, Chris; Gavaris, S.; Kell, Laurence T.; Lewy, P.; Mesnil, Benoit; Punt, A. E.; Cook, R. M.; O’Brien, C. M.; Skagen, Dankert W.; Stefánsson, Gunnar (ICES CM documents, Working paper, 2000)
      The performance of uncertainty estimation procedures was evaluated with respect to accuracy. A confidence statement is said to be accurate if the confidence point achieves the desired probability coverage. A Monte Carlo ...

    • Overview of the EU fair project "STEREO" (Stock effects on recruitment relationships) 

      MacKenzie, Brian; Heath, Michael; Ådlandsvik, Bjørn; Backhaus, Jan O.; Bogstad, Bjarte; Gallego, Alejandro; Godø, Olav Rune; Gudmundsdottir, Asta; Harms, Ingo H.; Heilmann, J.P.; Jonsson, Sigurður; Kjesbu, Olav Sigurd; MacKenzie, Eddie; Marteinsdottir, Gudrun; Nielsen, Einar E.; Scott, Beth; Strugnell, G.; Stefánsson, Gunnar; Thorsen, Anders; Visser, Andre W.; Wright, Peter (ICES CM Documents;1999/Y:10, Working paper, 1999)
      The overall objective of the STEREO project is to improve the methodology for determining limit reference points for the biomass of exploited fish stocks. Limit reference points set boundaries which are intended to ...

    • Validating three methods for making probability statements in fisheries forecasts. 

      Patterson, K. R.; Cook, R. M.; Darby, Chris; Gavaris, S.; Mesnil, Benoit; Punt, A. E.; Restrepo, V. R.; Skagen, Dankert W.; Stefánsson, Gunnar; Smith, M. (ICES CM documents, Working paper, 2000)
      We report on a test of three methods that have been used by ICES in making probability statements about fisheries forecasts to management agencies (XSA/WGMTERM, ICA/ICP, and a stochastic projection method that was first ...