66 research outputs found
Evaluating camera trapping as a method for estimating cheetah abundance in ranching areas
In order to accurately assess the status of the cheetah Acinonyx jubatus it is necessary to obtain data on numbers and demographic trends. However, cheetahs are notoriously difficult to survey because they occur at very low population densities and are often shy and elusive. In South Africa the problem is further complicated in areas where land is privately owned, restricting access, with dense bush and cheetahs that are frequently persecuted. Cheetahs are individually identifiable by their unique spot patterns, making them ideal candidates for capture-recapture surveys. Photographs of cheetahs were obtained using four camera traps placed successively at a total of 12 trap locations in areas of known cheetah activity within a 300 km2 area in the Thabazimbi district of the Limpopo Province. During 10 trapping periods, five different cheetahs were photographed. These results were used to generate capture histories for each cheetah and the data were analysed using the capture-recapture software package CAPTURE. Closure tests indicated that the population was closed (P = 0.056). The Mh model was used to deal with possible heterogeneous capture probabilities among individual cheetahs. Closure tests did not reject the model assumption of population closure (P = 0.056). The Mh model produced a capture probability of 0.17 with an estimate of 6-14 cheetahs (P = 0.95) and a mean population size of seven cheetahs (S.E. = 1.93). These results are promising and will be improved with employment of more camera traps and sampling a larger area
A 20-year review of the status and distribution of African wild dogs (Lycaon pictus) in South Africa
South Africa is one of only seven countries with a viable population of African wild dogs
(Lycaon pictus). The national population in 2017 was 372 adults and yearlings and comprised three subpopulations: 1) Kruger National Park (Kruger), 2) an intensively managed
metapopulation established through reintroductions into isolated, fenced reserves, and 3) a
free-roaming population that occurs naturally outside protected areas. We assessed the
long-term (four wild dog generations, ~20 years) trends in population size and growth rate
within each of these three subpopulations. We found that Kruger supports a substantial
population,which has declined over time.The metapopulation is the only subpopulation that
has increased significantly over time (both in population size and number of packs), likely
due to intensive conservation efforts and the reintroduction of wild dogs into 15 additional
reserves since 1998. The free-roaming subpopulation has remained small but stable, even
though the number of packs has declined due to anthropogenic threats. The overall national
population has remained stable even though the number of packs has increased. Kruger has
consistently supported the highest proportion of the national population over the last two
decades. However, the contribution of the metapopulation has increased significantly over
time. It is clear that despite differences in survey effort among the three subpopulations,
South Africa has a small (~500) but stable population of wild dogs, with the metapopulation
contribution becoming increasingly important. The circumstances in the country necessitate, and demonstrate the benefit of, intensive, adaptive management for the national population of wild dogs. While this assessment provides baseline information for the three
subpopulations, wild dog conservation in South Africa would benefit greatly from equal
survey effort and standardized methods to accurately assess long-term population trends.https://journals.co.za/journal/wild2pm2021Zoology and Entomolog
The prevalence, characteristics and effectiveness of Aichi Target 11's "other effective areaâbased conservation measures" (OECMs) in key biodiversity areas
Aichi Target 11 of the CBD Strategic Plan for Biodiversity commits countries to the effective conservation of areas of importance for biodiversity, through protected areas and "other effective area-based conservation measures" (OECMs). However, the prevalence and characteristics of OECMs are poorly known, particularly in sites of importance for biodiversity. We assess the prevalence of potential OECMs in 740 terrestrial Key Biodiversity Areas (KBAs) outside known or mapped protected areas across ten countries. A majority of unprotected KBAs (76.5%) were at least partly covered by one or more potential OECMs. The conservation of ecosystem services or biodiversity was a stated management aim in 73% of these OECMs. Local or central government bodies managed the highest number of potential OECMs, followed by local and indigenous communities and private landowners. There was no difference between unprotected KBAs with or without OECMs in forest loss or in a number of state-pressure-response metrics
The prevalence, characteristics and effectiveness of Aichi Target 11 ' s "other effective area-based conservation measures" (OECMs) in Key Biodiversity Areas
Aichi Target 11 of the CBD Strategic Plan for Biodiversity commits countries to the effective conservation of areas of importance for biodiversity, through protected areas and âother effective area-based conservation measuresâ (OECMs). However, the prevalence and characteristics of OECMs are poorly known, particularly in sites of importance for biodiversity. We assess the prevalence of potential OECMs in 740 terrestrial Key Biodiversity Areas (KBAs) outside known or mapped protected areas across ten countries. A majority of unprotected KBAs (76.5%) were at least partly covered by one or more potential OECMs. The conservation of ecosystem services or biodiversity was a stated management aim in 73% of these OECMs. Local or central government bodies managed the highest number of potential OECMs, followed by local and indigenous communities and private landowners. There was no difference between unprotected KBAs with or without OECMs in forest loss or in a number of state-pressure-response metrics.The project was funded by the CCI Collaborative Fun
The global decline of cheetah Acinonyx jubatus and what it means for conservation
Establishing and maintaining protected areas (PAs) are key tools for biodiversity conservation. However, this approach is insufficient for many species, particularly those that are wide-ranging and sparse. The cheetah Acinonyx jubatus exemplifies such a species and faces extreme challenges to its survival. Here, we show that the global population is estimated at âŒ7,100 individuals and confined to 9% of its historical distributional range. However, the majority of current range (77%) occurs outside of PAs, where the species faces multiple threats. Scenario modeling shows that, where growth rates are suppressed outside PAs, extinction rates increase rapidly as the proportion of population protected declines. Sensitivity analysis shows that growth rates within PAs have to be high if they are to compensate for declines outside. Susceptibility of cheetah to rapid decline is evidenced by recent rapid contraction in range, supporting an uplisting of the International Union for the Conservation of Nature (IUCN) Red List threat assessment to endangered. Our results are applicable to other protection-reliant species, which may be subject to systematic underestimation of threat when there is insufficient information outside PAs. Ultimately, conserving many of these species necessitates a paradigm shift in conservation toward a holistic approach that incentivizes protection and promotes sustainable humanâwildlife coexistence across large multiple-use landscapes
Equitable and effective areaâbased conservation: towards the conserved areas paradigm
In 2018, the Parties to the Convention on Biological Diversity (CBD) adopted a decision on protected areas and other effective area-based conservation measures (OECMs). It contains the definition of an OECM and related scientific and technical advice that has broadened the scope of governance authorities and areas that can be engaged and recognised in global conservation efforts. The voluntary guidance on OECMs and protected areas, also included in the decision, promotes the use of diverse, effective and equitable governance models, the integration of protected areas and OECMs into wider landscapes and seascapes, and mainstreaming of biodiversity conservation across sectors. Taken as a whole, the advice and voluntary guidance provides further clarity about the CBD Partiesâ understanding of what constitutes equitable and effective area-based conservation measures within and beyond protected areas and provides standardised criteria with which to measure and report areasâ attributes and performance. This policy perspective suggests that this CBD decision represents further evidence of the evolution from the ânew paradigm for protected areasâ to a broader âconserved areas paradigmâ that embodies good governance, equity and effective conservation outcomes and is inclusive of a diversity of contributions to conservation within and beyond protected areas
Cheetah conservation in South Africa
Cheetahs should be conserved as drivers of biodiversity conservation and asinstruments of nature based tourism development. Only 7 500 cheetahs remain worldwide and their numbers continue to decrease. The species is currently listed as vulnerable, but is close to re-listing as endangered. In South Africa the distribution has shrunk from covering the whole country with the exception of forest to a narrow band along the Northern border from Kgalagadi to Kruger. In addition, 38 fenced reserves have successfully reintroduced the cheetah. The main threats in South Africa are direct persecution, loss of prey base and habitat, illegal trade and inbreeding. The cause for persecution is a perceived conflict with livestock and wildlife ranchin
Evaluating habitat connectivity methodologies: a case study with endangered African wild dogs in South Africa
Context In fragmented landscapes, connectivity between subpopulations is vital for speciesâ persistence. Various techniques are used to assess the degree of connectivity between habitat patches, yet their performance is seldom evaluated. Models are regularly based on habitat selection by individuals in resident populations, yet dispersers may not require
habitat which supports permanent residence.
Objectives and methods Using a database of African wild dog (Lycaon pictus) occurrence records in northeastern South Africa (n = 576), we developed and compared ecological niche models (ENM) for wild dogs packs and dispersers. Additionally, we used least cost
path (LCP) and current flow models to assess connectivity. Results were further validated using occurrence records (n = 339) for cheetah (Acinonyx jubatus). Results and conclusions The ENM for wild dog packs identified large but isolated patches of suitable habitat, while the disperser ENM had greater suitability values for areas in between highly suitable patches. Without disperser-specific data, models omitted large areas which were confirmed to have
provided connectivity. Although models derived from a potentially subjective cost layer have been criticised, the current flow model outperformed the other connectivity techniques and provided the most meaningful
predictions for conservation planning. We
identified five priority conservation areas for wild dogs, two of which had a greater feasibility for recolonisation. The scarcity of disperser-specific data promotes models using habitat data for resident individuals but here we illustrate the pitfalls thereof.
Our study provides insights into the performance of these frequently employed techniques and how they may affect conservation management decisions
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