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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The tip of the iceberg : spatio-temporal patterns of marine resource confiscations in the Table Mountain National Park

Brill, Gregg Clifford 03 1900 (has links)
Thesis (MSc)--Stellenbosch University, 2012. / ENGLISH ABSTRACT: The aim of this study was to determine the scale of marine poaching in the Table Mountain National Park by analysing the amounts of South African abalone, West Coast rock lobster, and shellfish, finfish and bait species confiscated from fishers operating in the park’s marine protected area between 2000 and 2009. The research objectives were fourfold, namely to strengthen conceptual frameworks on illegal harvesting in protected areas; identify the quantities of the various species seized by park officials over the decadal period; cartographically plot the areas in which confiscations took place; and distinguish the different resource users and stakeholders operating in the park and examine the roles they play in resource exploitation. Data was collected from offence logbooks maintained by SANParks rangers and managers, and from records kept by Marine and Coastal Management and the South African Police Services. GIS outputs indicated seizure events over the spatial area of the park. Further data relating to the levels of poaching was sourced from illegal fishers operating in the park who discussed their operations candidly. The research findings indicate that poaching of both abalone and rock lobsters has increased significantly over time. Other marine species show lesser amounts of resources poached over the ten-year period. Spatial outcomes suggest that confiscations of abalone occur predominantly on the east coast of the park, while higher seizure events occur on the west coast for lobsters. Shellfish, finfish and bait species were confiscated in equal amounts from illegal fishers on both the east and west coasts. Future research recommended includes garnering further confiscations data from the police services and undertaking contemporary baseline assessments to discover the effects poaching has had on the resource base since the previous stock assessment in 2001. The challenge laid out for the custodians of the Table Mountain National Park marine protected area is to provide and protect cultural and environmental resources, without compromising biodiversity management, community associations and conservation strategies. / AFRIKAANSE OPSOMMING: Die doel van hierdie studie was om die skaal van marienebronstroping in die Tafelberg Nasionale Park te bepaal deur middel van die ontleding van die hoeveelhede Suid-Afrikaanse perlemoen, Weskus-kreef en skulpvis, vinvis en aasspesies wat vanaf oortreders (2000 tot 2009), gekonfiskeer is. Die doel van die navorsing was viervoudig naamlik, die versterking van die navorser se konseptuele-basis rondom die stroping van hulpbronne in beskermde gebiede; die bepaling van die hoeveelhede en tipe spesies wat deur parkbeamptes in beslag geneem is; die plekke waar konfiskasies plaasgevind het; en om die verskillende hulpbron gebruikers en belanghebbendes te onderskei en hulle rolle in die mariene-hulpbron benutting te ondersoek. Primêre konfiskasie-data is verkry vanaf SANparke se logboeke wat deur beamptes instandgehou is en sekondêre data is verskaf deur Mariene en Kusbestuur en die Suid-Afrikaanse Polisiediens. Beslagleggingsgebeure is dmv GIS tegnologie op kaarte vasgelê. Verdere inligting oor die vlakke van stroping is bekom deur openhartige gesprekvoering met vissers wat onwettig in die park bedrywig is. Die navorsing het bevind dat die stropery van perlemoen en kreef met die verloop van tyd aansienlik toegeneem het. Ander mariene spesies het kleiner hoeveelhede stropery van die hulpbron oor die studietydperk aangetoon. Ruimtelike voorstellings toon dat perlemoen-stropery hoofsaaklik aan die ooskus van die park voorkom, terwyl groter beslagleggings/konfiskerings van kreef aan die weskus van die park plaasgevind het. Skulpvis, vinvis en aasspesies is gekonfiskeer by vissers wat onwettig bedrywig is in ewe groot hoeveelhede op beide die ooskus en die weskus. Toekomstige navorsing moet meer inligting oor beslagleggings van die polisie bekom en die kontemporêre basislynassesserings moet meer gereeld onderneem word om veral die effek van stropery op die hulpbron bloot te lê. Die laaste basislyn-assessering het in 2001 plaasgevind. Die uitdaging voor die bewaarders van die park se marienebeskermde gebiede is om kulturele en omgewingshulpbronne toeganklik vir alle gebruikers te maak maar dit ter selfder tyd ook te beskerm, sonder om biodiversiteit, gemeenskapassosiasies en bewaring strategieë te kompromitteer.
2

Custodians of the Cape Peninsula : a historical and contemporary ethnography of urban conservation in Cape Town

Swanepoel, Janie 12 1900 (has links)
Thesis (MA)--Stellenbosch University, 2013. / ENGLISH ABSTRACT: The official custodian of the Cape Peninsula mountain chain, located at the centre of Cape Town, is the Table Mountain National Park (TMNP). This park is South Africa’s only urban open-access park and has been declared a World Heritage Site. This thesis is an anthropological and historical examination of the past and present conservation of the Cape Peninsula . I provide an overview of the relationship between the urban environment and the Cape Peninsula aiming to illustrate the produced character of the mountains and its mediation in power relations. This study of custodianship reveals that protecting and conserving the Cape Peninsula is shaped by the politics of the urban and natural environment as well as by the experience of living in the city. As such, official and unofficial custodianship is informed by class and race differentiations, embedded in the politics of identity, responsive to the local and national political transformations in governance and connected to the urban struggles of the marginalised Capetonians. Furthermore, inherent in the notion of custodianship is the social appropriation of the Cape Peninsula which was shown to produce specific ideological representations of nature. The thesis presents an ethnographic study of Hangberg, a poor neighbourhood situated at the border of the TMNP. There, the encroachments and poaching within the park boundaries is addressed by focussing on the competing discourses between biodiversity, entitlement and heritage. The engagements between the TMNP, the state and Hangberg on the issues of conservation reveal the distinct complexities of running a national park in a city beset with inequalities. My focus on these engagements also illustrates that the manifestation of ‘community’ is a construction contingent upon circumstances which reflect a meaningful and political relationship between identity, citizenship and place, rather than a homogeneous group of people. I conclude with the idea that in attempting to make the park socially and racially equitable, urban conservation ought to begin to recognise its distinct urban character in the larger socio-environmental framework of the city. / AFRIKAANSE OPSOMMING: Die offisiële beskermheer van die Kaapse Skiereiland Bergreeks, geleë in die sentrum van Kaapstad, is die Tafelberg Nasionale Park (TNP). Die park is Suid-Afrika se enigste stedelike en oop-toegangspark en is verklaar as ’n Wêreld Erfenis Gebied. Hierdie tesis is ’n antropologiese en historiese studie van die huidige en geskiedkundige beskerming van die Kaapse Skiereiland. ’n Oorsig van die verhouding tussen die stedelike omgewing en die Kaapse Skiereiland ontbloot die geproduseerde karakter van die bergreeks en die bemiddeling daarvan in magsverhoudinge. ’n Studie van die beskermheerders van die Kaapse Skiereiland toon aan dat die beskerming en bewaring van die bergreeks (of dele daarvan) afhanklik is van die stedelike en nasionale politieke klimaat en die ervaring van ’n stedelike lewe. Sodoende word offisiële en nie-offisiële kuratorskap as klas- en ras-onderskeibaar, ingebed in identiteitspolitiek, verwant aan die plaaslike en nasionale politieke transformasies in die regering, en verbonde aan die stryd van armes in Kaapstad gedefinieer. Verder, inherent aan kuratorskap is die sosiale toe-eiening van die Kaapse Skiereiland wat spesifieke ideologiese voorstellings van die natuur in die stad produseer. Die tesis bied’n etnografiese studie van Hangberg aan, ’n arm woonbuurt geleë op die grens van die TNP. Ek bespreek die onwettige behuising en stropery binne die park se grense deur te fokus op die kompeterende diskoerse tussen biodiversiteit, regte en erfenis. Die onderhandelinge tussen die TNP, die staat, en Hangberg in verband met die kwessies rondom bewaring ontbloot die spesifieke kompleksiteit daarvan om ’n nasionale park in ’n stad geteister deur ongelykhede te bestuur. Hierdie fokus illustreer dat ‘gemeenskap’ manifesteer as ’n konstruksie wat afhanklik is van omstandighede en dui op ’n betekenisvolle en politieke verhouding tussen identiteit, burgerskap en plek, eerder as ’n homogene groep. Ek sluit af met die idee dat in ’n poging om die TNP meer sosiaal- en ras-inklusief te maak, behoort stedelike bewaring die spesifieke stedelike karakter daarvan te erken in die groter sosialeomgewingsraamwerk van die stad.
3

Development of a habitat suitability model to determine the potential distribution of Klipspringer (Oreotragus Oreotragus subsp. Oreotragus) in Table Mountain National Park

Smith, Richardt John January 2015 (has links)
Thesis (MTech (Nature Conservation))--Cape Peninsula University of Technology, 2015. / The klipspringer (Oreotragus oreotragus subsp. oreotragus) population became extinct on the Cape Peninsula in 1930. Being re-introduced into Table Mountain National Park (TMNP) in 1999 it became one of the species of special conservation concern to monitor in the Park. Most klipspringer territories are known by Park management but the distribution of all potentially suitable habitats for this species in the Park is not known. The main aim of this study is to produce a distribution range map that is representative of all potentially suitable habitats for the klipspringer within TMNP, through the use of a species distribution modelling tool. Since only presence data were available for this study, a popular presence-only modelling tool namely maximum entropy (MaxEnt) was used. The use of MaxEnt in species distribution modelling has become popular as it has proven to provide robust predictions of a species’ geographic distribution. Klipspringer occurrence data and five environmental variables namely altitude, slope, aspect, vegetation, and distance to urban edge were used as model input. Occurrence data were sourced through existing databases and employing a stratified random sampling technique of dividing the Park into different habitat subtypes to survey the Park for more klipspringer occurrences. These habitat subtypes consisted of a variety of vegetation communities or vegetation types and altitudinal and slope ranges available in the Park. Grid size for all the raster layers used was 10x10 m. Spatial filtering of one point per 100 m² grid was used to eliminate clumping of points. Six models were run at different regularisation multiplier (RM) values namely 0.25, 0.5, default (1), 2, 4 and 7. To assist in better understanding of the spatial extent of the occurrence data and the areas inhabited by the klipspringer, home range analyses were carried out. This was done through kernel density estimation in the Geospatial Modelling Environment (GME). All six bandwidth parameters in GME namely smoothed cross validation (SCV), biased cross-validation (BCV), a second BCV algorithm, plug-in estimator, least squares cross validation and the likelihood cross validation (CVh) were tested. The smoothed cross validation and likelihood cross validation bandwidth algorithms provided the best visual output of klipspringer home ranges and territories. Home range sizes from the SCV output ranged from about 3 – 11 ha across the study area, and home range size for the CVh output ranged from 0.6 – 2.5 ha. The output from the CVh algorithm was interpreted as territories rather than home ranges, as it is based on a univariate kernel unlike, the SCV algorithm that produces rotated bivariate kernels. iv The default regularisation multiplier of 1 provided the best probability distribution output, whilst values lower than the default tended to underestimate the prediction and those values higher than the default were tending towards overestimations. Response curves for the default RM also gave the most ecologically meaningful responses of the klipspringer to each environmental variable. Model evaluation in the form of area under the receiver operating characteristic curve (ROC AUC) showed that all models performed well. Therefore, the choice of the “best” model was based on the ability to provide ecological interpretation, on the shape of the response curve and the probability distribution maps. Consequently, the default RM model was considered the best, with an AUC score of 0.903. Altitude and vegetation contributed the most to suitable habitat and therefore indicates that klipspringer in the Park do prefer high altitudinal areas with the right vegetation to feed on. Suitable altitudinal ranges are from 400 m.a.s.l. and higher and ericaceous fynbos is the most preferred vegetation community. Slope, aspect and distance to urban edge played a less important role in suitable klipspringer habitat. The probability map and an additional binary map produced at the 10 percentile training logistic presence threshold showed that suitable habitat for the klipspringer occurs in all three sections of the Park in different proportions. These maps can be used by Park management to prioritise conservation efforts and future re-introductions. / National Research Foundation

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