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Trophy quality in monitoring ungulate population status in sub-Saharan Africavon Brandis, Rainer 23 June 2005 (has links)
Thesis (MTech. degree in Nature Conservation ) - Tshwane University of Technology, 2004. / It was investigated whether long term trends in the quality of trophy ungulates hunted in
sub-Saharan Africa can be used to monitor the status of those populations. The
philosophy of the underlying assumptions are discussed and weighed against the absence
of population monitoring techniques in countries exhibiting poor socio-economic
conditions. A database of approximately 10 000 trophy measurements were analysed on a
spatio-temporal scale in order to define potentially concerning trends in trophy quality
over time. A threshold of potential concern was defined and incorporated into a stochastic
model. In the species-specific analysis, concerning declines were found for Impala,
Springbuck and Mountain reedbuck in South Africa. In the area-specific analysis,
concerning declines were found in Botswana and the Northern Cape province of South
Africa. As a population-monitoring tool this method is cost-effective and requires little
effort however, the lack of statistical sensitivity only provides significant results in
extreme conditions. As an economic indicator, this method allows governments to
evaluate the quality and sustainability of their ‘huntable’ ungulate resources and adjust
hunting quotas accordingly.
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Spatial variation in trophy quality of popular hunted ungulate species in South Africavon Brandis, RG, Reilly, BK 01 April 2008 (has links)
Adatabase of approximately 9000 trophy measurements of ungulates hunted in South Africa
between 1993 and 2001 was analysed in order to detect species-specific, regional variation in
mean trophy quality. Blesbok (Damaliscus dorcas), eland (Taurotragus oryx), impala
(Aepyceros melampus), kudu (Tragelaphus strepsiceros), mountain reedbuck (Redunca
fulvorufula) and springbok (Antidorcas marsupialis) showed statistically significant
variation in trophy quality. A number of other species including blue wildebeest
(Connochaetus taurinus), black wildebeest (Connochaetus gnou), bushbuck (Tragelaphus
angusticeps), common reedbuck (Redunca redunca), gemsbok (Oryx gazella), red
hartebeest (Alcelaphus buselaphus), nyala (Tragelaphus angasii) and waterbuck (Kobus
ellipsiprymnus) were insignificant. The manipulation of trophy quality on ranches is speculated
to be the major cause of these significant regional variations. It is recommended that
species-specific baselines of trophy quality and associated levels of ‘acceptable manipulation’be
established and incorporated into a national trophy quality monitoring programme to
provide some level of protection to an industry that contributes significantly to the South African
economy.
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