• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 15
  • 1
  • Tagged with
  • 35
  • 12
  • 11
  • 11
  • 11
  • 9
  • 9
  • 9
  • 8
  • 8
  • 7
  • 6
  • 6
  • 6
  • 5
  • 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.
11

Treacherous, Deviant, and Submissive: Female Sexuality Represented in the Character Catwoman

Lecker, Michael 26 March 2007 (has links)
No description available.
12

Evaluation of spoor tracking to monitor cheetah abundance in central northern Namibia.

January 2007 (has links)
The design, implementation, management and the evaluation of sound conservation practices, is often dependent on the availability of reliable estimates of animal abundance. Large carnivores often pose particular problems in this regard, due to their low densities and wide-ranging behaviour, so the true abundance of such species are seldom able to be reported in literature . As a result, the use of indices of abundance, mostly for relative abundance, has been investigated. However, before these indices can be reliably utilized for conservation purposes , there is a pressing need to calibrate them. As of yet, calibration studies have primarily been performed on demarcated conservation areas, where individuals could be individually identified. Not all these calibrations studies reported indices to be a function of true density. Nevertheless , spoor frequency has been reported to be a function of true density for carnivores in certain Parks in Namibia . Precisely , cheetah spoor density was reported to correlate with visuals in the Kgalagadi Transfrontier Park. The majority of these studies elucidate a species spatial organization, animal behaviour, as the paramount factor determining the relationship between densities estimated via different censusing methods. Thus, the efficiency of spoor frequency to estimate and monitor relative abundance for wild cheetahs is yet to be empirically tested . Despite the lack of a true density estimate for the free-ranging cheetahs in the study area, evaluated spoor tracking as a possible index to monitor relative cheetah abundance using radiotelemetry densities estimates as representative of true abundance for the area, for the 1995 to 2000 period. The study is considered to be opportunistic , and a pillar for future research, as transects where spoor tracking was conducted were layout primarily for ungulates strip counts. Least-linear regression and Spearman's correlation were used to evaluate the relationship between density estimates derived by the two methods. Percentages of change on annual densities were also regressed as a mean to test spoor frequency sensitivity to density changes. The calibration of spoor frequency with estimates of density produced using radio-telemetry, without the ascription of imprints to individual animals, was poor (rs=17.4, y=0.36+0.20). The sensitivity analysis also showed spoor tracking poor reliability to monitor cheetah population. This can be attributed, in order of importance, to the discrepancies on the spatial extent sampled by the two methods, the species large home ranges, substrate quality , habitat preferences, the availability of farm road networks and the transect design, i.e., cyclic. However, the paramount factor limiting the study conclusions was the lack of a more local density estimate at a farm level. Therefore, the use of spoor frequency to estimate wild cheetah relative abundance requires further research, particularly using a different sampling design, longer straight transects and the acquisition of local densities estimates. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2007.
13

Scatology as non-invasive tool for conservation of cheetah (Acinonyx jubatus Von Schreber, 1775) in South Africa

Herring, Kiersten Sarah 12 June 2009 (has links)
Cheetah are difficult to census and as a result there is only a limited amount of information regarding the status of cheetah populations across South Africa making it difficult to identify and address potential threats and to plan effective conservation strategies. The aim of this study was to determine if scatology could be used as a non-invasive method for genetic analysis of cheetah in South Africa. Corresponding blood and faecal samples were collected from cheetah at the De Wildt Cheetah Centre. The faecal samples were aged and then collected and stored in ethanol after four days and after two weeks. Faecal samples of suspected wild cheetah were also collected in the Thabazimbi area in the Limpopo Province. DNA was than isolated from all the blood and faecal samples. A species-specific primer set was developed in the mitochondrial control region to reliably identify cheetah faecal samples. The PCR amplification success of the species-specific marker was high, all fresh faecal samples had a positive result (100%), four-day-old samples were 83% positive and two-week-old samples were 94% positive. The species-specific primer was found to be effective in accurate cheetah identification and had greater amplification success on fresh samples. Twelve microsatellite markers were used to profile the blood and faecal samples. Multiple PCRs were performed per faecal sample per marker to ensure that the genotype obtained was correct. Amplification success of the 12 microsatellites was 59% for fresh samples, 20% for four-day-old samples and 2.4% for two-week-old samples. Difficulties associated with the technique included poor DNA quality and quantity and genotyping errors, resulting in allelic dropout and false alleles. Genotyping errors were determined by comparing the genotype of the faeces with that of the matching blood sample. Overall, allelic dropout experienced was 16% and 7% for false alleles. These values correspond to the results of similar studies. Samples of suspected wild cheetah were collected in the Thabazimbi area and were analysed. The alleles obtained were similar to those from the pilot study. Data of 45 De Wildt cheetah samples obtained from the NZG were analysed and compared with the results of the pilot study, as expected, all alleles in the De Wildt population occurred in the NZG samples. The alleles found in this study and in the NZG samples can be used as the standard when using molecular scatology techniques. The results of this study provide valuable guidelines for future studies of cheetah using the non-invasive technique of scatology. The genotypic information from the 12 microsatellites can now be used as a standard when analyzing samples of cheetah origin. Using this information, additional markers can now be tested for improved amplification success and decreased rates of allelic dropout and occurrences of false alleles. The results prove the feasibility of using cheetah faeces as a potential source of DNA for population studies of cheetah in South Africa in addition to the methods currently employed. / Dissertation (MSc)--University of Pretoria, 2010. / Animal and Wildlife Sciences / unrestricted
14

The feeding ecology, habitat selection and hunting behaviour of re-introduced cheetah on Kwandwe Private Game Reserve, Eastern Cape Province

Bissett, Charlene January 2005 (has links)
The re-introduction of cheetah onto small reserves in the Eastern Cape Province has created the opportunity to study this species in an environment (Valley Bushveld) in which it has not previously been studied and which is quite different from the less wooded habitats in which previous studies have occurred. Thus the aim of this study is to add to the growing number of studies of cheetah in more wooded habitats and to contribute a better understanding of the level of specialization or adaptability in space use, habitat selection, diet and hunting behaviour that the cheetah possesses. The research was conducted on Kwandwe Private Game Reserve from February 2003 to August 2004. Direct observations, scat analysis and continuous observations were used to avoid bias towards large sized prey found when only using direct observations to study diet. The cheetah killed 15 species and four of the five most important prey species (kudu, springbok, grey duiker and bushbuck) were hunted according to their abundance on the reserve, while impala, the fifth most important prey species, was avoided (i.e. preference index less than one) by the cheetah. The cheetah’s main prey was medium sized ungulates, although the three male coalition killed larger prey than females and females with cubs. The daily food intake per cheetah per day was calculated to range from 5.3kg/cheetah/day for the coalition to 8kg/cheetah/day for a solitary female. Home range areas ranged from 11.1 km² for female cheetah with cubs in a den to 65.6 km² for single female cheetah and core areas ranged from 6 km² for the three male coalition to 26.5 km² for independent cubs. Habitat selection by cheetah on Kwandwe varied between the social groups depending on their susceptibility to predation by lions, their need for cover and need for water, and was similar to what has been previously reported. The home range of the coalition incorporated the most open vegetation type (karroid shrubland) with surrounding denser vegetation, while females occupied areas of denser vegetation. Activity patterns and hunting behaviour varied between different cheetah social groups with female cheetah being more active during day light hours compared to males which made 38% of their kills after dark. The average chase distances for the various cheetah groups varied considerably, and the chase distance for successful hunts was longer than for unsuccessful for all groups except single female cheetah. The percentage of kills’ kleptoparasitised on Kwandwe was very low compared to other studies possibly due to the low density of direct competitors, which in turn lead to longer mean kill retention times. These results suggest that cheetah are more adaptable than previously thought and this adaptability may have important implications for their conservation.
15

Chemical communication : chemical characterization of volatile constituents of urine of the southern African cheetah, Acinonyx jubatus jubatus, using headspace sampling and GC-MS

Visser, Runine (Runine Cecile) 12 1900 (has links)
Thesis (MSc)--Stellenbosch University, 2002. / ENGLISH ABSTRACT: The cheetah, Acinonyx jubatus, sometimes referred to as "the greyhound of the cats", is probably the most elegant member of the cat family. Formerly widespread in southern Africa it is now threatened with extinction. It occurs in open savanna and light woodland, but also hilly country on occasion. The cheetah is a predator that can reach speeds of more then 110 km/h in short bursts. With a mass of between only 40 to 60 kg, it is not very powerful and cannot defend itself very effectively against carnivores such as the lion and hyaena, for example. This might be the reason why, in order not to advertise its presence, the urine of this animal is practically odourless. In turn, this might explain why no research has so far been devoted to the urine of this animal. In contrast extensive work has been done on the chemical characterisation of the urine of many other carnivores, notably the lion. Extraction of the urine with dichloromethane gave too little material for GC-MS. SPME sampling of the urine itself gave insufficient sample enrichment. Better results were obtained when an SPME-type of headspace sampling, using a larger mass of polydimethylsiloxane, was employed although many of the constituents of the urine could still barely be detected. The compounds identified include a large number of ketones, aldehydes, cyclic and acyclic ethers, carboxylic acids, amides two sulphur compounds in barely detectable quantities, and elemental sulphur. Perhaps the most remarkable result of this thesis is that it was found that the urine of the cheetah, although it is a carnivore, does not contain several sulphur compounds in relatively high concentrations. However, it does contain elemental sulphur. Perhaps a mechanism exists by which the cheetah can convert strongly odorous sulphur containing compounds into the less strongly smelling sulphur. / AFRIKAANSE OPSOMMING: Die jagluiperd, Acinonyx jubatus, 'n roofdier wat tydens 'n jagtog vir kort tye snelhede van meer as 110 km/h kan bereik, is waarskynlik die elegantste lid van die katfamilie. Met sy vaartbelynde liggaam weeg die dier egter slegs tussen 40 en 60 kg kan hy homself nie doeltreffend teen groter roofdiere verdedig nie. Chemiese verbindings, sogenaamde feromone, wat onder andere in die uriene uitgeskei word, word dikwels deur diere gebruik vir gebiedsafbakening en om met ander lede van die spesie te kommunikeer. Die uriene van die jadluiperd is egter feitlik reukloos. Tot dusver is die chemiese samestelling van die uriene van die jagluiperd nog nie ondersoek nie. Ekstraksie van die uriene met dichlorometaan het te min materiaal vir gaschromatografies-massaspektrometriese analise opgelewer, maar bevredigende resultate is verkry deur van 'n verbeterde monsternemingsmetode gebruik te maak. 'n Groot aantal organiese verbindings en twee swawelbevattende verbindings in skaars waarneembare hoeveelhede is in die uriene geïdentifiseer. Daar is egter 'n aansienlike hoeveelheid van die element swawel is in die uriene gevind. Laasgenoemde ontdekking, is die mees verbasende resultaat van hierdie navorsing. Die uitskeiding van swawel in uriene is, sover bekend, eenmalig in die soogdierwêreld. Dit is moontlik dat die jagluiperd oor 'n meganisme beskik om swawelverbindings wat baie sterk ruik om te sit na swawel wat nie so sterk ruik nie. Hierdie meganisme sal die dier se kanse op oorlewing verbeter deur van die swawelbevattende verbindings in sy dieet ontslae te raak sonder om sy teenwoordigheid in die omgewing te adverteer.
16

FEMALE REACTION TO MALE URINE SCENTS AS POTENTIAL INDICATOR OF MATE CHOICE IN CAPTIVE CHEETAHS (ACINONYX JUBATUS)

Mossotti, Regina Helen 01 May 2010 (has links)
AN ABSTRACT OF THE THESIS OF REGINA HELEN MOSSOTTI, for the Master of Science degree in ZOOLOGY, presented 23 October 2009, at Southern Illinois University Carbondale. TITLE: FEMALE REACTION TO MALE URINE SCENTS AS POTENTIAL INDICATOR OF MATE CHOICE IN CAPTIVE CHEETAHS (ACINONYX JUBATUS) MAJOR PROFESSOR: GEORGE A. FELDHAMER Genetic variation in the cheetah (Acinonyx jubatus) has become dangerously low because of dramatic population decline and fragmentation. Zoos throughout the world manage captive cheetahs with breeding programs to maximize genetic heterozygosity. Unfortunately, the zoo community has not accomplished consistent breeding success with cheetahs, possibly because of a general lack of information on sociosexual behavior. Currently, individual cheetahs are assigned mates based primarily on genetic relatedness; however, evidence from many species suggests that allowing animals to choose mates increases breeding success. When animals, primarily females, are allowed to choose mates they will often pick the best genetic match. I tested whether female cheetahs can determine their genetic relatedness to males by investigating their urine scents. Voided male urine was collected following scent marking. The female was offered scents from three different males: one from an unrelated male, a "good" mate choice (A), another from a male that was equivalent to a second cousin, an "average" mate choice (B), and one from a male that was closely related, equivalent to a brother/father, a "poor" mate choice (C). Every female was also offered "blank" gauze as a control (D). The scents were offered in a pair-wise forced choice paradigm for a total of six possible combinations. All behaviors displayed toward each scent (and their duration) were recorded. The estrous cycling of each female was monitored through fecal hormone evaluation for approximately six weeks, including the weeks during scent trials. In every pairing except C vs. D, the females spent more time overall with the better mate choice in the pair; with three of the comparisons being significantly different (A>C, t=2.38, df=11, P=0.039; A>D, t=1.88, df=11, P= 0.087 and B>D, t=2.62, df=8, P=0.045). Proximity was the most frequently observed behavior and females spent more time in proximity to the most distantly related male scent in all pairings. They spent significantly more time in proximity with A in AC pairing (t=2.25, df=10, P=0.049) and with B in the BC and BD pairings (t=6.37, df=8, P=0.0002; t=2.46, df=6, P=0.049; respectively). Sniffing was the next most frequently observed behavior, and in all pairings (except CD) females spent more time sniffing the most distantly related male's scent; but was only significantly different for A in the AD pairing (t=2.31, df=7, P=0.055). Lag time of estradiol in fecal samples varies between individuals; therefore, the affect of daily estradiol concentrations on scent choices could not be determined. This is the first mate choice study using urine with a mammalian carnivore.
17

The cheetahs of the Northern Tuli Game Reserve, Botswana: population estimates, monitoring techniques and human-predator conflict

Brassine, Eleanor I January 2015 (has links)
Remaining viable cheetah (Acinonyx jubatus) populations in Africa are threatened by direct persecution through conflict with farmers and habitat degradation and fragmentation. Botswana is considered a stronghold for free roaming cheetahs in Africa, yet the country has had relatively limited research on its cheetahs, and information from the east of the country is lacking. Data on the current status of populations is thus required to make informed management decisions. My study provides estimates of population density, abundance, distribution and status for the demographically open cheetah population of the Northern Tuli Game Reserve (NOTUGRE) in Botswana. The effectiveness of two population monitoring methods, namely camera trapping and a photographic survey, were also investigated. Moreover, I report on the level of conflict between livestock farmers and predators on rural communal farmlands within and adjacent to NOTUGRE. Data were collected between May 2012 and November 2013. Results indicate a low population density of 0.61 ± 0.18 adult cheetahs per 100 km² and a minimum population size of 10 individuals (nine adults and one cub). Camera traps placed at cheetah scent-marking posts increased detection rates and provided ideal set up locations. This approach, together with Spatial Explicit Capture- Recapture (SECR) models, is recommended for future studies. The long-term studies that are required to better understand the status of cheetahs in Botswana do not exist. Thus, photographic surveys may provide an alternative method for providing baseline data on population numbers, distribution and demography. The third aspect of my study gathered information on levels of livestock loss and human tolerance of predators through the use of interviews (n = 80). Conflict with subsistence farmers is a concern as livestock depredation is relatively high (9.1% of total livestock owned) and farmers had an overall negative attitude towards conservation of large predators. My results suggest that human-predator conflict in this area is more complex than the direct financial loss from depredation. Hence, reducing depredation rates alone is unlikely to change farmer tolerance of wildlife on farmlands. Improved, responsible farm management, including self-responsibility for livestock rearing, and positive appreciation for wildlife are necessary. The NOTUGRE cheetah population requires further research to understand possible threats to the population. Furthermore, a better understanding of the connectivity between cheetahs of NOTUGRE, South Africa and Zimbabwe is required. The number of cheetahs within NOTUGRE is too small to sustain a viable population, hence conserving cheetahs outside of the protected area should be a priority for the conservation of the population. This can only be achieved through assistance and involvement from national authorities, local people and conservation organisations.
18

Interrelationships between the larger carnivores of the Klaserie private nature reserve with special reference to the leopard Pantera pardus (Linnaeus, 1758) and the cheetah Acinonyx jubatus (Schreber, 1775)

Kruger, John Ernst 03 October 2007 (has links)
Please read the abstract in the section 00front of this document / Dissertation (MSc (Wildlife Management))--University of Pretoria, 2007. / Zoology and Entomology / MSc / Unrestricted
19

Development and Implementation of a Longitudinal Welfare Approach of Cheetahs (Acinonyx jubatus) at the Columbus Zoo and Aquarium

Fischer, Brittany Nicole January 2020 (has links)
No description available.
20

Effects of Olfactory Enrichments on African Cheetahs (Acinonyx Jubatus)

Abston, Marcus Chas 01 August 2017 (has links)
AN ABSTRACT OF THE THESIS OF MARCUS C. ABSTON, for the Master of Science degree in ZOOLOGY, presented on 18 April 2017, at Southern Illinois University Carbondale. TITLE: EFFECTS OF OLFACTORY ENRICHMENT ON AFRICAN CHEETAHS (ACINONYX JUBATUS) MAJOR PROFESSOR: Dr. Carey Krajewski Environmental enrichment has been an essential part of felid husbandry in zoos, serving to reduce both physiological and psychological stress. Olfactory enrichment is one of many interventions used to prevent stereotypic behavior caused by stress in felids. However, little research has been done on this practice. The purpose of this study was to compare behavioral responses of four captive African cheetahs to six types of commercial fragrances used as olfactory enrichment stimuli. Three of these fragrances are marketed as “men’s cologne” and three as “women’s perfume”. The fragrances were also categorized as musky, spice, and floral types. Behavioral responses were recorded by live observations during 36 bouts at the St. Louis Zoo. There was a significant difference between cheetahs’ interaction time with male and female fragrances; they seemed to prefer male colognes. However, there was no significant difference in interaction time among fragrance types. Engagement behaviors varied among individuals (e.g. sniffing, scent rolling, pawing), but were similar to those reported by previous authors. These findings suggest that commercial fragrances may be a useful option for African cheetah olfactory enrichment.

Page generated in 0.0281 seconds