The frozen zoo concept

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Abstract
Biologic material from exotic species is difficult to obtain for scientists. Yet much depends on the availability of such materials for a better understanding of evolutionary relationships and genetics of animals. Zoos have an obligation to participate in the safeguarding of some of these tissues by preserving cells, serum, and organs under optimal conditions. This paper describes the state of the frozen tissue‐cell bank at San Diego Zoo and examines possible future directions for the collection of essential materials.