Pretty sure it was a USA Paperback.
Man wakes up from a stasis chamber in a cave(?) finds himself in a deserted environment. (jungle/plains/river). He finds 2 other stasis chambers (they slow time as opposed to frozen cryo pods) in the cave containing 2 woman in primitive garb. One is a young (20ish) slim attractive homo-sapiens cave woman, and the other is an older (30s?) heavy set, unattractive neanderthal looking woman.
They do not speak each others language. Eventually he figures out that they are in a large (20x20 miles?/100x100 miles?) enclosed area on a planet (invisible walls or force fields) and that there are many of these enclosed areas on the planet. There are animals and fish to hunt and edible plants to gather for food (everything is earth-like). But the nearest enclosure had aliens and alien looking plants and animal life. [Don't remember if he journeyed to the other 3 borders to check them out, which is why I think it was 100x100 miles.]
I don't know if there was an info-panel in the cave he got the info from or if he was able hack it from a stasis pod. Pretty sure they use one stasis pod as a "refrigerator" when they kill large animals so the meat does not go bad.
Two things about the women I remember:
- The Younger one was the quintessential gold-digger on steroids. If he did not have anything she wanted she ignored him, If he had something she wanted (food, clothes, weapon, shiny rock) she was kissing up and crawling all over him to get him to give it to her. If he did not want to (he needed it or there was not enough) she would fuss, an whine, and bitch and moan, scream, and pester him endlessly, until he gave her whatever she wanted. (Eventually it got to where after a few days/weeks(?) of her attitude he would have enough, and trick her into getting into a stasis chamber and leave her in it for a few days, so he could relax. When he would let her back out, she would not know how long it had been, and would only feel like she had just had a safe, good night's sleep.)
- The older one was empathic, she could tell what others were feeling. (Pretty sure it was not telepathic, so she did not know exactly what he thinking) So if he was hungry, she would feel it and get him food, or water, or get weapons if he was feeling threatened by the wild animals, or tools or materials if he was trying to make something, or eagerly taking off her clothes if he was feeling "frisky".
I don't think it was actually a zoo, as I am pretty sure there were no visitors coming to look at the "animals" in the cages. Pretty sure it was more of a storage place of alien "Adams and Eves" to repopulate worlds who had failed.
Pretty sure there was a conflict involving the aliens in the next enclosure trying to break out of their enclosure and into his enclosure to attack the humans. I think he figured out that some of the enclosures had failed, (from the stasis chamber hacking or from finding an info panel) from aliens breaking into neighboring enclosures and destroying the lifeforms in it.