Rationale
(Changed due to Same category and criteria)
Listed as Least Concern, as Blesbok are abundant on both formally and privately protected land. We estimate a minimum mature population size of 54,426 individuals (using a 70% mature population structure) across 678 protected areas and wildlife ranches (counts between 2010 and 2016). There are at least an estimated 17,235 animals (counts between 2013 and 2016) on formally protected areas across the country, with the largest subpopulation occurring on Golden Gate Highlands National Park. The population has increased significantly over three generations (1990-2015) in formally protected areas across its range and is similarly suspected to have increased on private lands. Apart from hybridisation with Bontebok, there are currently no major threats to its long-term survival. Approximately 69% of Blesbok can be considered genetically pure (A. van Wyk and D. Dalton unpubl. data), and stricter translocation policies should be established to prevent the mixing of subspecies. Overall, this subspecies could become a keystone in the sustainable wildlife economy.
Population trend
Trend
Subpopulations are thriving in the various provinces where the species occurs and the total population is estimated to be at least 77,751 animals (2010–2016 counts) on both formally protected areas and wildlife ranches across the country (678 reserves or ranches). This would equate to 54,426 mature individuals using a 70% mature population structure. On formally protected areas alone, there were at least 17,235 animals counted between 2013 and 2016 (EWT unpubl. data). Thus, there are well over 10,000 mature individuals in the assessment region with no expectations of major declines in the near future. However, subpopulations have declined sharply in areas outside of their distributional range (Mkhambithi, Nduli and Luchaba Nature Reserves) due to the removal of extra-limital species from these reserves. The total population estimate is lower than what East (1999) estimated: 235,000–240,000 animals, of which 97% were thought to be on private farms and 3% in protected areas (East 1999). While the latter is likely an overestimate, the true population size probably falls between the two estimates. There are certainly greater numbers on private land than formally protected areas. For example, in North West Province, there were an estimated 1,483 Blesbok in provincial parks, while around 9,874 occurred on private farms in 2010 (Power 2014). However, more field surveys are needed to determine which private subpopulations can be considered wild and free-roaming.
Generation length has been calculated as 8.4 years, yielding a three-generation window of 25 years (1990–2015). Over three generations, the population is estimated to have increased. For example: in Camdeboo National Park (Eastern Cape) the subpopulation increased from 67 in 1990 to 189 in 2015 (Gaylard unpubl. data); in Golden Gate Highlands National Park (Free State) the subpopulation increased from 451 in 1994 to 8,785 in 2016 (including the incorporation of QwaQwa National Park) (Bissett et al. 2016); and in Bloemhof Dam Nature Reserve (North West) the subpopulation increased from 91 in 1999 to 919 in 2015 (Nel 2015). Other subpopulations on formally protected areas are mostly increasing or stable. For example, Suikerbosrand Nature Reserve in Gauteng has sustained a subpopulation of around 500 since 2004 (521 and 466 individuals in 2004 and 2014 respectively) and over the past recent decade, subpopulations of Blesbok in provincial nature reserves in the Eastern Cape have been increasing (D. Peinke unpubl. data). In Free State Province, the population in provincial protected areas increased by an average annual rate of 28.2% between 2004 and 2014 (E. Schulze unpubl. data).