The population dynamics of impala (Aepyceros melampus Lichtenstein) in Mkuzi Game Reserve.
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Date
1979
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Abstract
The need to understand the dynamics of the impala
population in Mkuzi Game Reserve arose during the early 1960's
when it became clear that various factors were contributing to
an overpopulation of the species in the reserve. Population
management was recognized as being necessary and was
carried out, but it was based on inadequate information. This study set out to establish a rational basis for future
management. The social organization and behaviour of impala
in Mkuzi were analysed and placed in perspective relative to
the population dynamics. Two methods of counting the animals
were used and a relationship obtained between the respective
results. The distribution of impala within the reserve, both
on a gross population basis and with respect to the various
sex and age categories, was determined from sampling.
In order to establish the age structure of the population,
samples obtained from the control programme were used, and
these were aged on the basis of molar wear. At the same time
the proportions of young animals and the population sex ratios
were obtained by field sampling.
Using these data, life tables were constructed, from .
which it was possible to interpret the behaviour of the population
at the time of the study. However, caution should be exercised
in extrapolating these results literally to the same population
under different conditions. The study only provides guidelines
for regular monitoring to be carried out. At the same time a
more detailed study of the vegetation dynamics of Mkuzi Game
Reserve is a priority so that the relationship between the animal
and plant elements of the reserve can be properly analysed.
Description
Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1979.
Keywords
Bovidae--South Africa., Impala--South Africa., Mammal populations., Wildlife management--South Africa., Theses--Zoology.