Hmm, it's not clear (in my mind anyway) what constitutes captive breeding versus farming. Clearly if you have an open pond and you stock it with sals and they breed, that is NOT captive breeding. If you have a tank in your house with long-term captive animals and they lay fertile eggs, that surely IS captive breeding. But once you put a tank/enclosure outdoors, you get all sorts of intermediate scenarios.
Is there any form of outdoor keeping that would be considered CB? If you keep axies in an outdoor pond and they lay eggs, is that farming or captive breeding? What if the animals are kept outdoors only part of the year?
Considering that the animals were long-term captives, the hibernation period was indoors, and the animals were completely enclosed outdoors, I would be inclined to call it captive breeding. But maybe I'm lacking a good definition of true captive breeding.