ICES Annual Science Conference Theme Session Q Advances in Reproductive Biology – Methodology and Applications for Fisheries Science CM 2005/Q:05 Not to be cited without prior reference to the author Systematic bias in estimates of reproductive potential of cod stocks: implications for stock/recruit theory and management C. Tara Marshall 1 , Coby L. Needle 2 , Anders Thorsen 3 , Olav Sigurd Kjesbu 3 , and Nathalia A. Yaragina 4 1 University of Aberdeen, School of Biological Sciences, Zoology Bldg., Tillydrone Ave., Aberdeen, AB24 2TZ, Scotland, UK 2 FRS Marine Laboratory, PO Box 101, 375 Victoria Rd., Aberdeen, AB11 9DB, Scotland 3 Institute of Marine Research, P.O. Box 1870, N-5817 Bergen, Norway 4 Polar Research Institute of Marine Fisheries and Oceanography, 6 Knipovich St., Murmansk, 1837763, Russia Correspondence: C. Tara Marshall, University of Aberdeen, School of Biological Sciences, Zoology Bldg., Tillydrone Ave., Aberdeen, AB24 2TZ, Scotland, UK (fax +44 (0)1224 272396; email c.t.marshall@abdn.ac.uk ). Key-words: cod, population dynamics, reproductive potential, recruitment, sex ratios, reference points, management 1 brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by Brage IMR