West Coast salmon fishing rules just changed for the 18th time this year

US regulators just changed the rules for recreational and commercial salmon fishing off the West Coast. This means fishermen must now follow new limits on where and when they can fish for salmon.

These are small, frequent adjustments to fishing rules. They reflect the constant tension between protecting fish populations and allowing people to make a living from fishing. Each change can mean the difference between a good season and a bad one for individual fishermen.