The management of extralimital giraffe (Giraffa Camelopardalis) in the mosaic thicket of Southern Cape, South Africa
- Authors: Cornelius, Andri Judith
- Date: 2010
- Subjects: Giraffe -- South Africa -- Eastern Cape , Giraffe -- Food -- South Africa -- Eastern Cape , Giraffe -- Ecology -- South Africa -- Eastern Cape , Animal behavior , Animal-plant relationships -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: vital:10749 , http://hdl.handle.net/10948/1345 , Giraffe -- South Africa -- Eastern Cape , Giraffe -- Food -- South Africa -- Eastern Cape , Giraffe -- Ecology -- South Africa -- Eastern Cape , Animal behavior , Animal-plant relationships -- South Africa -- Eastern Cape
- Description: The giraffe at Nyaru were found to be browsers who made little use of graze during the study period. They utilized a diversity of 20 browse species. Two species, Acacia karroo and Acacia cyclops, formed the bulk of the giraffe diet throughout the year. A definite seasonal dietary shift was evident. A. karroo was favoured in summer and autumn and formed the main food species in spring, summer and autumn. A. cyclops was favoured throughout the study, but its contribution to the diet increased during winter when less A. karroo was consumed. This seasonal shift is related to the deciduous nature of Acacia karroo. Although a seasonal shift in species contribution to giraffe diet has been observed in many other giraffe feeding studies, no studies on giraffe feeding have been done in the Mosaic Thicket of the southern Cape. The ecological browsing capacity for giraffe in thicket was estimated to be between 0.020 BU/ha and 0.095 BU/ha. The browsing capacity for giraffe at Nyaru, based on the available phytomass 2–5 m above the ground, was estimated using those species that formed the bulk of the giraffe diet, and amounted to 0.063 BU/ha. A maximum of three giraffe could thus be stocked on the 157 ha of suitable giraffe habitat on Nyaru. This stocking rate recommendation lies within the range commonly recommended by local consultants for giraffe introductions into the southern Cape. Their recommendations are, however, not based on quantitative assessments such as performed in this study. The recommendation of this study should not be applied as a fixed ecological capacity for giraffe in thicket, but should be seen as a starting point in the adaptive management cycle. Ongoing monitoring of parameters, such as herbaceous composition and phytomass; as well as the condition of key browse species, is strongly advocated. A. karroo was browsed significantly more and carried significantly fewer pods per tree at a heavily used site compared to a lightly used site. Heavy browsing thus appears to affect the reproductive success of A. karroo significantly. Fewer pods are likely to lead to lower regeneration and thus reduced density of A. karroo. Whether A. karroo will maintain its dominance within the thicket vii community in the long run will be related to how individual plants survive and reproduce and if some can escape from herbivory. Fewer G. occidentalis were clumped with other species at the heavily used site compared to the lightly used site. This could possibly be attributed to the fact that intense browsing pressure at the heavily used site caused protective clumps to be eaten away, thus exposing G. occidentalis to higher ungulate browsing. Previous studies have found that nurse shrubs protect G. occidentalis against ungulate browsing. G. occidentalis was browsed significantly more at the heavily used site compared to the lightly used site. There was a general trend of fewer fruits at the heavily used site compared to the lightly used site, while fruits were absent on G. occidentalis growing alone at the heavily used site. This suggests a negative effect of heavy browsing on plant reproductive success and emphasizes the importance of nurse plants for the successful recruitment and hence long term prevalence of G. occidentalis in Mosaic Thicket.
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- Date Issued: 2010
The management of chacma baboons and humans in a peri-urban environment: a case study from Nelson Mandela Metropolitan University's George Campus
- Authors: Botes, Peet
- Date: 2016
- Subjects: Human-animal relationships , Animal behavior , Human beings , Bestiality
- Language: English
- Type: Thesis , Masters , MTech
- Identifier: http://hdl.handle.net/10948/5135 , vital:20812
- Description: Conflicts between humans and baboons (Papio ursinus) have become a significant management challenge on Nelson Mandela Metropolitan University’s (NMMUs) George Campus, which is located in peri-urban George in the Garden Route, of the Western Cape of South Africa. Current management policy, although required to be ‘scientifically’ based, largely relies on studies done outside the Garden Route. This study addresses the question of how the management of human-baboon relations could be improved on the campus. A case study was undertaken which aimed at addressing the cohabitation of baboons and humans on the NMMU campus, specifically human-baboon resource selection and interaction. The research methodology and the related analytical tools were primarily quantitative but were supplemented by some qualitative data drawn from interviews. Data collected was used to determine landscape features acting as Keystone Resource Areas (KRAs) for both humans and baboons on the campus. Relationships between the frequency and location of negative interactions, and resident-baboon distribution on the campus were also determined. Two key findings emerged from the research. First, residences, non-residence buildings and waste disposal stations act as KRAs for both humans and baboons. Second, the frequency of negative interaction correlates with the time spent by residents and baboons at residences, where common negative interactions between baboons and humans are known to occur. It is postulated that cohabitation on the NMMU George Campus is causing the habituation of baboons, a loss of fear of humans and association of humans with high energy foods. As a result, present cohabitation contributes to negative human-baboon relations in the George area. To ensure sustainable co-existence between humans and baboons on the George Campus, management should implement zonation and wildlife monitoring to reverse the loss of baboon fear of humans and better limit the availability of human-derived foods. In addition, management should consider giving stakeholders co-management roles to foster and facilitate knowledge and responsibility partnerships, and subsequently correct any misunderstandings related to human-baboon relations on the campus. Recommendations for further research include sampling beyond campus boundaries to compensate for regional variations in baboon behaviour and the biophysical environment.
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- Date Issued: 2016