Abstract
The proposition is examined that cytogenetic studies are needed in the conservation of wild captive animals. Several cases of polymorphic species have hybridized to produce infertile offspring. In several gazelle species, this accidental hybridization among look-alike animals has led to the extinction of zoo populations. The suggestion that this is always the result of inbreeding is thus erroneous. Cytogenetic study is also needed in animals that are destined for reintroduction, as accidental release of chromosomally different species is counterproductive to the reestablishment of wild stock. Several examples of mammalian species that have flourished from an extremely small founder stock are here examined to draw attention to the possibility that "inbreeding" is not invariably disadvantageous. The karyotypes of two hybridizing Kobus species with divergent chromosomal numbers are described.
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