i don't know for sure but with pike, it may be because they're "invasive" and have no natural predators. they eat a lot of the forage and hurt healthy populations of other fish like bass. they're definitely a big threat to the stocked trout.
i was in maine a few years back and there were signs at the boat launches saying it was the law to kill any pike you catch. i couldn't believe it. i was told they really care about their trout and salmon up there.
i don't know for sure but with pike, it may be because they're "invasive" and have no natural predators. they eat a lot of the forage and hurt healthy populations of other fish like bass. they're definitely a big threat to the stocked trout.
i was in maine a few years back and there were signs at the boat launches saying it was the law to kill any pike you catch. i couldn't believe it. i was told they really care about their trout and salmon up there.
sam is right about maine because a few years back I was fishing lake cobbie with my uncle and I caught a jumbo pike and he had to kill it because it was the law
http://www.state.me.us/ifw/fishing/species/management_plans/northernpike.pdf
scroll down to page 7 and read. it states that maine does not have a protective regulation on pike fishing so there are no size limits and unlimited daily bag numbers, and also states anglers are "encouraged" to harvest every pike they catch. funny cause it says that pike were first illegaly introduced in maine in the belgrade lakes which is actually where our cabin is lol. its actually because of belgrade pike that i started fishing again after so many years , i was out in the boat a few years back with my girls uncle and he took me to his favorite pike spot where i saw almost man sized pike swimming around just feet below us! we are going up for a week in june and i cant wait! im bringing my john boat and ill be buying lots of suckers while there