"The following books (All available from Amazon.co.uk) make for interesting if depressing reading on fishery and conservation issues.
The End of the Line: How Overfishing Is Changing the World and What We Eat
Cod: A Biography of the Fish That Changed the World
Empty Ocean
In a Perfect Ocean: The State of Fisheries and Ecosystems in the North Atlantic Ocean
All well worth a read. The most readable is definitely ""The End of the Line"". If you only read one, read that. I can guarantee that you'll come away from it understanding that the plight and future of fish stocks are much, much worse than you could ever have believed possible....."