With most of the independently owned tackle shops either tits up or barely surviving, I am not sure the tackle industry would accept a tax on fishing goods with open arms. A tax like this would assuredly put another 15% of them out of business.
As far as myself, I would pay an extra(fishing) tax. But, only if the funds generated are not wasted on ineffecient hatcheries. Instead, put into means of restoring naturally occurring runs - Fish that are self-sustaining.