For Arturo, it sounds as if there's no way out. I am ambivalent about zoos, but those with ecologically exotic species - polar bears in Mendoza are an obvious example - need to scale down unless they have extraordinary resources. The worst offenders are probably places like http://www.mundomarino.com.ar/site/web/index.php, which imprisons marine mammals, but it would be harder to eliminate places like http://www.montereybayaquarium.org/