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Carnivora
Id code: amd101Viverridae
Genetta angolensis
Bocage, 1882
(Eng) Angolan genet
(Fre) Genette d'Angola
Taxonomic notes
No significant taxonomic notes.
IUCN threat category
Not listed.
Available information
Almost nothing is known on the ecology of the species. Data available are mainly from Angola. Crawford-Cabral (1969, 1980-81, 1989) report on its distribution and briefly describe the habitat in which it seems to occur. General information on the species’ ecology is also found in Kingdon (1997).
Known extent of occurrence
The Angolan genet occurs from Angola, east and north-east to Tanzania and Mozambique (Wilson & Reeder, 1993). Fig. 3.6.4.a was obtained from Kingdon (1997) and revised by Dr. H. Van Rompaey (20 May 1997).
Categorical-discrete (CD) distribution model
The species occurs primarily in Miombo (Brachystegia) woodlands (Kingdon, 1997; Crawford-Cabral, 1980-81).
Based on these environmental preferences, the following scores were assigned (Fig. 3.6.4.a):
|
Score (*) |
|
|
1 |
Miombo woodlands. |
|
2 |
Dry woodlands and woodland mosaics. |
|
3 |
Forests; grasslands; bushlands; croplands. |
|
(*) Scores increased for vegetation types occurring inside a 1-km buffer around permanent water. |
|
|
suitable |
moderately suitable |
unsuitable |
Total |
||||
|
km2 |
% |
km2 |
% |
km2 |
% |
km2 |
% |
|
1 053 619 |
53 |
622 970 |
31 |
322 137 |
16 |
1 998 726 |
100 |
Tab 3.6.4.a: Cumulative size (km
2) of areas pertaining to each environmental suitability class within the Extent of Occurrence.|
Number Patches (NP) |
Mean Patch Size (MPS) km2 |
Patch Size SD (PSSD) km2 |
Largest Patch Index (LPI) % |
Mean Shape Index (MSI) |
Area-Weighted Mean Shape Index (AWMSI) |
|
|
suitable |
1 118 |
937 |
18 706 |
32.8 |
1.34 |
27.47 |
|
moderately suitable |
2 019 |
312 |
4 002 |
8.5 |
1.4 |
16.01 |
|
Total AO |
147 |
11 416 |
136 941 |
99.28 |
1.44 |
27.81 |
Tab 3.6.4.b: Area of Occupancy fragmentation indexes.
Probabilistic-continuous (PC) distribution model
The output of the probabilistic-continuous (PC) distribution model is shown in Fig. 3.6.4.c.
Validation
No occurrence of the species within the four sample areas.
Comments and conservation issues
The known EO of the species is classified as largely suitable: the total AO accounts for at least 84% of the EO. Although it appears highly fragmented (number of patches and MPS), comparing the LPI of the suitable, moderately suitable and total AO shows that the AO is basically one continuous patch, although dishomogeneous in its suitability (see the AWMSI). The less suitable areas appear to be in Angola. Limits of the EO in Zambia do not seem to match available areas and there are no biogeographic reasons or interspecific competition to justify their form; it might be useful to research the true distribution limits there further. About 10% of the total AO is included in the existing protected areas, but the species is not endangered.
|
SUITABILITY CLASS |
inside |
outside |
Total |
|
suitable |
5.28 |
47.43 |
52.71 |
|
moderately suitable |
3.86 |
27.30 |
31.17 |
|
unsuitable |
2.60 |
13.52 |
16.12 |
|
Total |
11.74 |
88.26 |
100 |
Tab 3.6.4.c: Percent of environmental suitability classes within EO (as obtained from the categorical-discrete distribution model) inside and outside the protected areas.
References
Crawford-Cabral J. (1969). As genetas de Angola. Boletim do Instituto de Investigacao Cientifica de Angola: Sep. 6(1), 7-40.
Crawford-Cabral J. (1980-81). The classification of the genets (Carnivora, Viverridae, genus Genetta). Bolm Soc. port. Cienc. nat.: 20, 97-114.
Crawford-Cabral J. (1989). Distributional data and notes on Angolan carnivores (Mammalia: Carnivora). I - Small and median-sized species. Garcia de Orta, Série de Zoologica: Lisboa 14(2), 3-27.
Kingdon J. (1997). The Kingdon field guide to African Mammals. Academic Press, London and New York: Natural World.
Wilson D.E., Reeder D.M. (Eds) (1993). Mammal Species of the World: A Taxonomic and Geographic Reference. Second edition. Smithsonian Institution Press, Washington D.C.