Re: Rhino Numbers and Census
Posted: Wed Aug 07, 2019 5:15 pm
Some rhino history: South-central black rhino Diceros bicornis minor and Southern white rhino Ceratotherium simum in KNP
South-central black rhino went locally extinct and the last one was sighted during 1936.
Reintroduction commenced in 1971, with a total of 81 black rhinos introduced by 1990. By 2009 black rhinos were increasing at 6.8% (95 % CI: 0.041–0.098) per annum and have reached a population size of 627 (95% CI: 588–666). South-eastern black rhino had high survival and an estimated inter-calving interval of 2.45 years. Age distributions and population growth suggested higher survival rates for dependent calves and adults compared to sub-adult males and females. The poaching onslaught since 2008 has resulted in a decline in the population. Several removals (six to Liwonde National Park in Malawi, six to Venetia Game Reserve (seven were captured with one capture related mortality), 12 (13 were caught with one capture related mortality) to North Luangwa National Park in Zambia, six to Moremi Game Reserve in Botswana and two orphans were raised and sold to private owners before 2012) can influence population responses.
Southern white rhinos were locally extinct by the turn of the 19th century. Authorities introduced 351 white rhinos between 1960 and 1972 sourced from Hluhluwe-iMfolozi Park. By the middle of the 1980s, authorities started to remove rhinos from KNP as donations to other conservation areas and zoological gardens. The population proliferated and by the late 1990s, authorities sold/exchanged and donated annually between 0.1% and 1.6% of the white rhinos to private owners as part of a developing wildlife economy associated with southern white rhinos and to other conservation areas. Between 1995 and 2015, 1465 white rhinos were moved out of KNP. Twenty-seven rhino orphans (24 white rhino and three black rhino) were rescued from 2012 to 2015 during the increased poaching onslaught. Twenty-four of these orphans were still alive by the end of 2015. Even so, rhinos continue to colonise KNP with 77.1% of landscapes having white rhinos present by 2010. Since 2008, the population was influenced by poaching as well as density- and rainfall-dependent responses in birth and death rate.
South-central black rhino went locally extinct and the last one was sighted during 1936.
Reintroduction commenced in 1971, with a total of 81 black rhinos introduced by 1990. By 2009 black rhinos were increasing at 6.8% (95 % CI: 0.041–0.098) per annum and have reached a population size of 627 (95% CI: 588–666). South-eastern black rhino had high survival and an estimated inter-calving interval of 2.45 years. Age distributions and population growth suggested higher survival rates for dependent calves and adults compared to sub-adult males and females. The poaching onslaught since 2008 has resulted in a decline in the population. Several removals (six to Liwonde National Park in Malawi, six to Venetia Game Reserve (seven were captured with one capture related mortality), 12 (13 were caught with one capture related mortality) to North Luangwa National Park in Zambia, six to Moremi Game Reserve in Botswana and two orphans were raised and sold to private owners before 2012) can influence population responses.
Southern white rhinos were locally extinct by the turn of the 19th century. Authorities introduced 351 white rhinos between 1960 and 1972 sourced from Hluhluwe-iMfolozi Park. By the middle of the 1980s, authorities started to remove rhinos from KNP as donations to other conservation areas and zoological gardens. The population proliferated and by the late 1990s, authorities sold/exchanged and donated annually between 0.1% and 1.6% of the white rhinos to private owners as part of a developing wildlife economy associated with southern white rhinos and to other conservation areas. Between 1995 and 2015, 1465 white rhinos were moved out of KNP. Twenty-seven rhino orphans (24 white rhino and three black rhino) were rescued from 2012 to 2015 during the increased poaching onslaught. Twenty-four of these orphans were still alive by the end of 2015. Even so, rhinos continue to colonise KNP with 77.1% of landscapes having white rhinos present by 2010. Since 2008, the population was influenced by poaching as well as density- and rainfall-dependent responses in birth and death rate.