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Reference Base  Black rhinoceros (Diceros bicornis (L.)): population size... |
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| Title: |
Black rhinoceros (Diceros bicornis (L.)): population size and structure in Ngorongoro Crater, Tanzania |
| Author(s): |
Kiwia, H.D. |
| Year published: |
1989 |
| Journal: |
African Journal of Ecology |
| Volume: |
27 |
| Pages: |
1-6, fig.1, tables 1-2 |
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| File: |
View PDF: 317,4 kb |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Distribution - Records
Black Rhino
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| The black rhinoceros (Diceros bicornis (L.)) in Ngorongoro Crater, Tanzania, are relatively sedentary (Klingel & Klingel, 1966; Goddard, 1967a; Kiwia, 1983), but a few individuals move between the floor and the Northern Highland Forest Reserve, where they |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Distribution - Records
Black Rhino
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| A total of twenty-five rhinos were counted in the area during the study (Table 1). Of the twenty-five rhinos, fifteen were permanent residents of the Crater floor and the remaining ten were temporary visitors. The sex ratio (male:female) for rhinos of a |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Ecology - Population
Black Rhino
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| The birth rate of the present population was 13.6%, compared to one of 24.1 % reported for the period 1964-1966 by Goddard (1967a). However, during my second visit to the area, a year later (December 1983), five more calves had been born, thus raising the birth rate to 24.2%, a value very close ... |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Ecology - Population
Black Rhino
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| A total of twenty-five rhinos were counted in the area during the study (Table 1). Of the twenty-five rhinos, fifteen were permanent residents of the Crater floor and the remaining ten were temporary visitors. The sex ratio (male:female) for rhinos of all age classes combined was 1: 1.2 and for... |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Distribution - Records
Black Rhino
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| The study was confined to Ngorongoro Crater (35?25'E, 3?5'S), which has an area of about 310 km? with the floor occupying 250 km? (Fig. 1). The geology of the Crater is summarized by Fosbrooke (1972) and Anderson & Herlocker (1973). Drainage is complete |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Ecology - Population
Black Rhino
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| The birth rate of the present population was 13.6%, compared to one of 24.1 % reported for the period 1964-1966 by Goddard (1967a). However, during my second visit to the area, a year later (December 1983), five more calves had been born, thus raising the birth rate to 24.2%, a value very close ... |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Ecology - Population
Black Rhino
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| Table 2. Sex and age ratios of Black Rhinoceros inTanzania and Kenya (all individuals known by. observer)
SampleSex ratio Age ratio Source of
Location size Male:Female Cow:Calf information
Ngorengoro Crater 24 1:1.2 100:45 This study
105 ... |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Ecology - Population
Black Rhino
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| Table 1. Past and present population size and structure of Black Rhinoceros in Ngorongoro Crater, Tanzania (n=number of rhinos; * residents; ^ temporary visitors)
1964-1966 1981-1982
(Goddard, 1967) (Author)
Age/Sex % of ... |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Management
Black Rhino
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| To date, information on the Minimum Viable Population (MVP) for ver- tebrates is mostly theoretical and controversial (Soul?, 1987). No attempt has been made to calculate the MVP for the rhino, for since the animal is long-lived, it will take time before a viability analysis for the species is p... |
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Location:
Subject:
Species:
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Africa - Eastern Africa - Tanzania
Ecology - Population
Black Rhino
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| The birth rate of the present population was 13.6%, compared to one of 24.1 % reported for the period 1964-1966 by Goddard (1967a). However, during my second visit to the area, a year later (December 1983), five more calves had been born, thus raising the birth rate to 24.2%, a value very close ... |
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