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Providing evidence to improve practice

Individual study: Reproduction in a reintroduced warthog population in the Eastern Cape Province

Published source details

Somers M.J. & Penzhorn B.L. (1992) Reproduction in a reintroduced warthog population in the Eastern Cape Province. South African Journal of Wildlife Research, 22, 57-60


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Translocate to re-establish or boost populations in native range Terrestrial Mammal Conservation

A study in 1976–1990 in a shrubland reserve in Cape Province, South Africa (Somers & Penzhorn 1992) found that translocated warthogs Phacochoerus aethiopicus survived, bred successfully and abundance increased over approximately 10 years. Ten to 11 years after the release of 20 warthogs, numbers of warthogs counted increased to 641. Thirteen to 14 years after release, 361 individuals were counted. Separate surveys of dead warthogs found that the population comprised a mixture of age groups, including juveniles (<1 year: 67-144 individuals), yearlings (1-2 years: 31-62 individuals) and adults (>2 years: 143-204 individuals). The majority of yearling and adult females examined (80-100%) were pregnant. In 1976–1977, twenty warthogs were introduced into a 6,493-ha reserve dominated by dense thorny scrub. Warthogs were surveyed by helicopter in 1981-1990. In 1987-1990, warthogs were shot at random from helicopters in order for carcasses to be examined and population age structure estimated.

(Summarised by Ricardo Rocha)