Basically, if you want to maximize the expected value of fish you catch your going to fish to the limit of your capabilities. It would also be perfectly rational to suggest instituting catch limits with vary large penalties. After the rule change you may be perfectly happy to obey them because they make you more money for less effort and breaking them is not worth the risk. Note, a lot of environmental preservation is rational it's voluntary environmentalism that's often irrational behavior.
Basically, if you want to maximize the expected value of fish you catch your going to fish to the limit of your capabilities. It would also be perfectly rational to suggest instituting catch limits with vary large penalties. After the rule change you may be perfectly happy to obey them because they make you more money for less effort and breaking them is not worth the risk. Note, a lot of environmental preservation is rational it's voluntary environmentalism that's often irrational behavior.