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Knight, M.H.; Hitchins, P.; Erb, K.P., 1993. An aerial survey of rhino and elephant in Chobe National Park and surrounding areas, Northern Botswana, September 1992. Pachyderm 17: 64-74, figs. 1-4, tables 1-2

Location: Africa - Southern Africa - Botswana
Subject: Distribution - Records
Species: Black Rhino

Original text on this topic:
Although the Botswana population was considered a separate subspecies D. b. chobiensis, based chiefly upon skull morphology (Rookmaaker & Groves, 1978), preliminary mitochondrial DNA analyses have revealed a closer affinity with the south-central ecotype D. b. minor than with the more arid-adapted southwestern ecotype D.b.bicornis (Harley, 1990), recognised by the African Rhino Workshop (Cincinnati, October 1986). Nonetheless, given the slight morphologial differences found in the Botswana population, the conservation of this genetic stock would be advantageous for the sake of preserving genetic heterozygosity until further definitive taxonomic work can be undertaken.

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