Report of the Study Group on Ageing Issues of Baltic Cod (SGABC)

A model on otolith growth in weight has been developed that relates otolith accretion rate to physical and physiological conditions. Two main factors, food and temperature, which both influence otolith growth, have been explored and mathematical expressions have been developed that conforms to bioenergetic knowledge. The model has only partly been validated since very few relevant experiments with known-age cod have been done in the Baltic.