Fecundity of Baltic cod: temporal and spatial variation

Potential and relative potential fecundity of 701 cod Gadus morhua caught i n the Bornholm Basin (ICES Sub-division 25) during 1987-1996 and 106 from t he Gdansk Deep (ICES Sub-division 26) in 1995 and 1996 varied significantly between years but neither between different spawning grounds nor between d ifferent sampling months within one spawning season. Growth and water tempe rature are factors identified to influence the mean relative fecundity expl aining 66% of the variance between years. (C) 2000 The Fisheries Society of the British Isles.