 Reference Base  A review of some life history features of the large herbi... |
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Mentis, M.T., 1972. A review of some life history features of the large herbivores of Africa. Lammergeyer 16: 1-89
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| Location: |
World |
| Subject: |
Reproduction |
| Species: |
Black Rhino |
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Observations of time intervals between successive births of same female:
40+ months, 32+ months (Greed 1967)
2 observations of 30 months (Hays 1967)
23 ? months (Yamamoto 1967)
2 observations of 24 months, 35 ? months (Goddard 1967)
25, 28, 29 months (Goddard 1967)
Roth & Child (1968) deduce from data from zoos (15 ? -16 months gestation and a 12-day period before the first oestrous post partem) a theoretical potential birth rate of 72-75 calves per 100 secxually mature females per year, i.e. 1 calf per adult every 16-16 ? months. These workers observed in the lake Kariba basin what they estimate a birth rate of about 50 calves to every 100 adult females, i.e. 1 calf every 2 years for each adult female.
Goddard syas that a normal healthy female could be expected to produce a calf every 27 months. This may be accepted as a realistic potential.
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