Ex situ conservation — protecting species outside their natural habitat in zoos, aquariums, seed banks and gene banks — raises fundamental ethical questions about the welfare trade-offs of captivity for conservation.
The welfare ethics of ex situ conservation require honest acknowledgement that most zoo animals live in conditions that compromise their natural behaviour and often their physical and psychological health. The conservation justification for captivity must be proportionate to the welfare cost — keeping an abundant, charismatic species in poor conditions to attract funding for conservation projects elsewhere is a weak justification. Genuinely endangered species in well-designed, welfare-focused facilities with real reintroduction programmes represent a stronger ethical case. The emergence of cryo-conservation — preserving genetic material rather than living animals — offers a welfare-neutral alternative that deserves greater investment.