http://www.cbc.ca/technology/story/2.../05/trout.html

Plse check this article out from the CBC.ca, it is from Oregon.

It appears that hatchery fish are lazy and may not want to bred, after being in the hatchery for a few years and they(the scientists) think that they may make lazy fry if they do get off their tail fins and do the nasty deed.

Sounds like maybe just maybe somebody somewhere needs something new to study