A reply I got from Malc. at Ammo Baits.
Thanks for circulating the Petition about cod. I absolutely agree that we are killing far too many small immature cod (and other species),
If I may say so, I think it is worse than as described by the Petition.
The EU minimum landing size (mls) is a pathetic 35 cm. Such a cod is less than 18 moths old. At three years old an average cod weighs 6 lbs and even then only a quarter of them will be mature. At fours years of age when an average cod weighs 9.5 lbs, almost two thirds will be mature. Only at six years of age can we be sure that ALL cod will have reached maturity and by then they average 17 lbs !
Just how ludicrous it is to catch such small cod (bearing in mind how large they can grow) is best illustrated by a recent article in Fishing News (commercial fishing weekly paper).
Fishing News 11 November 2005
Record-breaking fish tag unravels secrets of cod
A cod was recently recapture from the sea two and a half years after being tagged with an electronic data storage device. During its time at liberty, the fish grew from 44cm to 85cm and increased its weight from a mere 800g to an impressive 6kg. The tag also showed that for the first year the fish remained in shallow waters (30-40 m) east of Shetland, then in the winter of 2004, it abruptly moved to deeper waters (120-150m). Here it stayed, but now moved in a vertical plane , perhaps reflecting a change in feeding behaviour or prey type. When caught, the cod was full of herring.
I calculate that represents an annual rate of increased weight of approx 250%. IF the value per kilo remains constant for a cod of 0.8 kilo and a cod of 6.00 kilos that's a hell of a return on leaving the capital in the bank [cod in the sea] BUT the value per kilo also increases with size. A 0.8 kilo fish would currently make