Not only is the cod one of the most valuable marine food fish it is also important as a predator in ocean ecosystems and is the subject of a great deal of research into its biology and exploitation. In recent years world stocks of commercially fished cod have collapsed, most famously the Northern cod stocks of the North East Coast of Canada. Now, massively falling catches in the North Sea have led to the recent heavy cuts in catch quotas. This important book will be a comprehensive handbook, covering all major aspects of the cod including biology, ecology, life histories, behaviour, commercial exploitation and conservation. Written by world experts on the species, this book is an essential purchase for all fisheries scientists, managers and fish biologists.