From what I had understood at the time, all offspring were supposed to be returned to the Brazilian government.
edit to add - don't want this to go too far off topic - here's a relevant thread about Mr Stone for further comment if needed -
http://www.faunaclassifieds.com/foru...d.php?t=452678
http://www.faunaclassifieds.com/foru...d.php?t=493635