Not too keen on the typical enclosure you see at the zoo, for any animal really, I mean even the dumbest animal would probably appreciate a change of scenery from time to time (unless by nature the animal likes to stay under the same rock it's whole life or whatever)
Then again my cat has never seen the great outdoors apart from through the windows of our house and she doesn't seem to mind.
Then again, that's not the same kind of captivity as I think we're talking about, and she's used to it, gets plenty of play and for a cat she's a bit dopey anyway. So this is probably irrelevant.
Leaning towards no unless it's for research, in a large enough area to provide mental stimulation etc etc (like that thing someone said about the people who study one animal in a big reserve type thing)...and I would probably say that under these circumstances the captivity shouldn't need to be a permanent arrangement? (yes/no) edit: and also like, is this really necessary anyway, is there a way to just do the research with the animals doing their thing freely?
I don't really know much about animal behaviour but yeah in general I would think the smarter the animal -> the more stimulation it needs -> the less boredom/lack of freedom it can tolerate -> the less likely it is to be happy in your usual zoo scenario.