4.21—Conservation by zoos and seed banks

Zoos and seed banks can protect endangered species and genetic diversity when wild conservation is not enough. Their value comes from research, captive breeding or storage, education and possible reintroduction—not from captivity alone.

Seed banks store genetically varied seeds under controlled conditions and can support research or future replanting; zoos can study behaviour, breed animals and prepare releases. Both may suffer from small samples, reduced genetic diversity, limited representativeness or poor survival after reintroduction.

A seed bank collecting from several wild sites preserves more allelic variety than storing one crop line. A captive-breeding programme may restore an endangered species, but release requires suitable habitat, disease checks and animals able to survive in the wild.

Ex situ conservation does not replace habitat protection. Evaluate the objective, genetic diversity, welfare, evidence and reintroduction feasibility rather than counting specimens as success.