Browsing Brage IMR by Author "Needle, Coby L."
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Deriving condition indices from standard fisheries databases and evaluating their sensitivity to variation in stored energy reserves
Marshall, C. Tara; Needle, Coby L.; Yaragina, Natalia A.; Ajiad, Adnan Mosa; Gusev, Evgeny (Journal article; Peer reviewed, 2004)To evaluate interstock differences in condition, it would be advantageous to develop stock-level condition indices from standardized databases on weight and length. This study describes a method for estimating stock-level ... -
Limiting inter-annual variation in total allowable catch strategies. An application to ICES roundfish stocks
Kell, Laurence T.; Pilling, Graham; Kirkwood, Geoffrey P.; Pastoors, Martin; Abaunza, Pablo; Aps, Robert; Biseau, Alain; Korsbrekke, Knut; Kunzlik, Philip; Laurec, Alain; Mesnil, Benoit; Needle, Coby L.; Roel, Beatriz; Ulrich, Clara (ICES CM Documents;2003/X:7, Working paper, 2003)This study evaluated through simulation management strategy that stabilise catch levels by setting bounds on the inter-annual variability in Total Allowable Catches (TACs). An integrated modelling approach was used, which ... -
Systematic bias in estimates of reproductive potential of an Atlantic cod (Gadus morhua) stock: implications for stock–recruit theory and management
Marshall, C. Tara; Needle, Coby L.; Thorsen, Anders; Kjesbu, Olav Sigurd; Yaragina, Natalia A. (Journal article; Peer reviewed, 2006)Stock–recruit relationships that use spawning stock biomass (SSB) to represent reproductive potential assume that the proportion of SSB composed of females and the relative fecundity (number of eggs produced per unit ... -
Systematic bias in estimates of reproductive potential of cod stocks: implications for stock/recruit theory and management
Marshall, C. Tara; Needle, Coby L.; Thorsen, Anders; Kjesbu, Olav Sigurd; Yaragina, Natalia A. (ICES CM documents, Working paper, 2005)Stock/recruit relationships, describing the relationship between the parental population and the number of offspring produced, are a central tool in population ecology. For fish populations the stock/recruit relationship ...