The use of camera‐trap data to model habitat use by antelope species in the Udzungwa Mountain forests, Tanzania

The ecology of many species of duiker, and other African forest antelope, is poorly known and yet knowledge of the factors determining their distribution and abundance is critical to the conservation of this increasingly threatened group. Camera-trapping was used to investigate forest antelope ecology in the biologically diverse Udzungwa Mountains, Tanzania. The relationship between cameratrapping rates and vegetation (and other habitat variables) was investigated using generalized linear modelling. Over 630 photographs of antelope were obtained, with Harvey’s duiker being the most recorded species. The camera-trap rate of Harvey’s duiker was positively related to the species diversity of small plant stems and negatively related to an index of visibility, while that of suni antelope was negatively related to the percentage ground cover of leaf-litter. The camera-trap rate of Harvey’s duiker was also negatively related to distance to the nearest village, as predicted for a species targeted for subsistence hunting. Camera-traps also recorded bushbuck and the threatened Tanzanian endemic Abbott’s duiker, but there were insufficient captures to model habitat use for these species. Results of this study illustrate the potential of camera-trapping for modelling habitat requirements and providing guidelines for the conservation management of threatened antelope populations in forest habitats.

[1]  P. Jarman,et al.  The Social Organisation of Antelope in Relation To Their Ecology , 1974 .

[2]  G. Dubost.  The size of African forest artiodactyls as determined by the vegetation structure , 1979 .

[3]  P. McCullagh,et al.  Generalized Linear Models , 1984 .

[4]  P. McCullagh,et al.  Generalized Linear Models , 1992 .

[5]  D. Lawson.  The food habits of suni antelopes (Neotragus moschatus) (Mammalia: Artiodactyla) , 1989 .

[6]  A. Blom,et al.  Man determines the distribution of elephants in the rain forests of northeastern Gabon , 1991 .

[7]  A. Boshoff,et al.  Comparison of the diet of crowned eagles in the Savanna and Forest Biomes of south-eastern South Africa , 1994 .

[8]  Temporal and spatial patterns in blue duikers Philatomba monticola and red duikers Cephalophus natalensis , 1995 .

[9]  F. Feer.  Seed dispersal in African forest ruminants , 1995, Journal of Tropical Ecology.

[10]  J. Hart,et al.  Diet, prey selection and ecological relations of leopard and golden cat in the Ituri Forest, Zaire , 1996 .

[11]  A. Noss.  The impacts of BaAka net hunting on rainforest wildlife , 1998 .

[12]  P. K. Muchaal,et al.  Impact of Village Hunting on Wildlife Populations in the Western Dja Reserve, Cameroon , 1999 .

[13]  John G. Robinson,et al.  Hunting for Sustainability in Tropical Forests , 1999 .

[14]  A. Noss.  Censusing rainforest game species with communal net hunts , 1999 .

[15]  R. Mittermeier,et al.  Biodiversity hotspots for conservation priorities , 2000, Nature.

[16]  B. V. van Vuuren,et al.  Retrieval of four adaptive lineages in duiker antelope: evidence from mitochondrial DNA sequences and fluorescence in situ hybridization. , 2001, Molecular phylogenetics and evolution.

[17]  J. Fjeldså,et al.  Conservation priorities for the forests of the Udzungwa Mountains, Tanzania, based on primates, duikers and birds , 2001 .

[18]  A. Plowman.  Nutrient intake and apparent digestibility of diets consumed by captive duikers at the Dambari Field Station, Zimbabwe , 2002 .

[19]  C. Chapman,et al.  Determinants of colobine monkey abundance: the importance of food energy, protein and fibre content. , 2003, The Journal of animal ecology.

[20]  A. Magurran,et al.  Measuring Biological Diversity , 2004 .

[21]  T. Hofmann,et al.  Feeding preferences of duiker (Cephalophus maxwelli, C. rufilatus, and C. niger) in Ivory Coast and Ghana , 2003 .

[22]  Margaret F. Kinnaird,et al.  Deforestation Trends in a Tropical Landscape and Implications for Endangered Large Mammals , 2003 .

[23]  Margaret F. Kinnaird,et al.  Crouching tigers, hidden prey: Sumatran tiger and prey populations in a tropical forest landscape , 2003 .

[24]  H. Newing.  Bushmeat hunting and management: implications of duiker ecology and interspecific competition , 2004, Biodiversity & Conservation.

[25]  D. Wilkie,et al.  Bushmeat hunting in the Congo Basin: an assessment of impacts and options for mitigation , 1999, Biodiversity & Conservation.

[26]  G. Dubost,et al.  A comparison of the diets of three major groups of primary consumers of Gabon (primates, squirrels and ruminants) , 1980, Oecologia.

[27]  F. Rovero,et al.  Estimating the abundance of forest antelopes by line transect techniques: a case from the Udzungwa Mountains of Tanzania , 2004 .

[28]  José Alexandre Felizola Diniz-Filho,et al.  Niche separation between the maned wolf ( Chrysocyon brachyurus ), the crab-eating fox ( Dusicyon thous ) and the hoary fox ( Dusicyon vetulus ) in central Brazil , 2004 .

[29]  A. Marshall,et al.  Monkey Abundance and Social Structure in Two High-Elevation Forest Reserves in the Udzungwa Mountains of Tanzania , 2005, International Journal of Primatology.

[30]  F. Rovero,et al.  Notes on Abbott's duiker (Cephalophus spadix True 1890) and other forest antelopes of Mwanihana Forest, Udzungwa Mountains, Tanzania, as revealed by camera-trapping and direct observations , 2005 .

[31]  Foraging behaviour and diet composition of bushbuck (Tragelaphus scriptus Pallas, 1766) in Queen Elizabeth National Park, western Uganda , 2005 .

[32]  Per Capita,et al.  About the authors , 1995, Machine Vision and Applications.

[33]  A. Paviolo,et al.  Density, habitat use and activity patterns of ocelots (Leopardus pardalis) in the Atlantic Forest of Misiones, Argentina , 2006 .

[34]  N. D. Burgessa,et al.  The biological importance of the Eastern Arc Mountains of Tanzania and Kenya , 2006 .

[35]  D. Macdonald,et al.  Getting to grips with the magnitude of exploitation: Bushmeat in the Cross–Sanaga rivers region, Nigeria and Cameroon , 2006 .

[36]  M. Nielsen.  Importance, cause and effect of bushmeat hunting in the Udzungwa Mountains, Tanzania: Implications for community based wildlife management , 2006 .

[37]  F. Rovero,et al.  Abundance of Diurnal Primates in Mwanihana Forest, Udzungwa Mountains, Tanzania , 2006, International Journal of Primatology.

[38]  A. Bowkett.  How do you monitor rare and elusive mammals? Counting duikers in Tanzania and Zimbabwe. , 2006 .

[39]  F. Rovero,et al.  The biological importance of the Eastern Arc Mountains of Tanzania and Kenya , 2007 .

[40]  A. Zuur,et al.  Analysing Ecological Data , 2007 .

[41]  A. Bowkett,et al.  Implications of assumption violation in density estimates of antelope from dung‐heap counts: a case study on grey duiker (Sylvicapra grimmia) in Zimbabwe , 2007 .

[42]  A. Marshall.  Disturbance in the Udzungwas: Responses of Monkeys and Trees to Forest Degradation , 2007 .

[43]  D. Bedigian.  Ecology of an African rain forest. Logging in Kibale and the conflict between conservation and exploitation , 2008, Economic Botany.

[44]  G. Dubost.  L‘écologie et la vie sociale du Céphalophe bleu (Cephalophus monticola Thunberg), petit ruminant forestier africain , 2010 .

[45]  Robert A. Greevy.  Data Analysis and Graphics Using R: An Example-Based Approach , 2010 .