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Habitat utilization and home range of the redwing francolin, Francolinus levaillantii , in highland grasslands, Mpumalanga province, South Africa
Author(s) -
Jansen R.,
Little R. M.,
Crowe T. M.
Publication year - 2000
Publication title -
african journal of ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.499
H-Index - 54
eISSN - 1365-2028
pISSN - 0141-6707
DOI - 10.1046/j.1365-2028.2000.00256.x
Subject(s) - habitat , grassland , geography , metapopulation , home range , grazing , range (aeronautics) , ecology , biology , population , medicine , biological dispersal , materials science , composite material , environmental health
The effects of intensive commercial livestock farming on the distribution and habitat use of the redwing francolin, Francolinus levaillantii , was investigated to identify habitat constraints that may contribute towards the observed decline of this species on livestock farms. Data on the size, placement of the home ranges and compositional habitat use from ten radio‐tracked individuals, five in commercially grazed (and frequently burned) and five in protected (and infrequently burned) highland grasslands, was collated to determine habitat preferences. Mean home range size within protected and grazed grassland study sites were similar and ranged between 7.6 and 15.4 hectares. However, habitat use by groups in grazed grasslands was restricted to areas of greater cover and food availability. Group sizes were significantly larger in protected (mean 3.77, n = 111 coveys) than in grazed and frequently burned grassland (mean = 2.96, n = 135 coveys). Smaller coveys in grazed habitats had smaller home ranges and were further spaced from one another. It is therefore suggested that habitat degradation, through excessive defoliation of the grassland from heavy grazing and frequent burning, both fragments francolin subpopulations and reduces the ecological availability of suitable habitat. Thus, undermining the metapopulation structure of the redwing francolin in these commercially grazed grasslands.