31. For biologists, he was the focus of fierce debate on whether captive animals could be returned to the wild. 32. Direct human intervention in captive animals greatly reduces the difficulties and threats that would otherwise be present in the wild. 33. "When captive animals are available, it makes no sense to deplete natural populations, " he says. 34. Answers to such questions are revealing a hidden world of marine mammals and helping people take better care of captive animals . 35. The hope is that visitors will find the captive animals irresistible and contribute to help save their relatives in the wild. 36. Captive animals that harbor the most HIV-like virus are a subspecies from countries farther west, Gabon and Cameroon.37. Research is being done on the environmental cues that have to be replicated before captive animals can be persuaded to breed. 38. In the 1970s they again occurred in Denmark and Sweden, where captive animals escaped and now survive in the wild. 39. To offset inbreeding, efforts to sustain genetic diversity in populations of endangered species and of captive animals have been suggested. 40. Healthy mice have been born with this technology . iPSC may one day be used to treat captive animals with diseases.
