Dissertations / Theses on the topic 'Wildlife capture'

Camera trapping studies often focus on estimating population density, which is critical for managing wild populations. Density estimators typically require unique markers such as stripe patterns to identify individuals but most animals do not have such markings. The spatial capture model (SC model; Chandler & Royle, 2013) estimates density without individual identification but lacks sufficient field testing. Here, both the SC model and calibrated capture rate indices were compared against ten sessions of live trapping data on kangaroo rats (Dipodomys spp). These camera and live trapping data were combined in a joint-likelihood model to further compare the two methods. From these comparisons, the factors governing the SC model?s success were scrutinized. Additionally, a method for estimating missed captures was developed and tested here. Regressions comparing live trapping density to the SC model density and capture rate were significant only for the capture rate comparison. Missed image rate had a significant relationship with ambient nighttime temperatures but only marginally improved the capture rate index calibration. Results showed the SC model was highly sensitive to deviations from its movement model, producing potentially misleading results. The model may be effective only when movement assumptions hold. Several factors such as camera coverage area, microhabitat, and burrow locations could be incorporated into the SC model density estimation process to improve precision and inference.

Originally endemic to South America, the nine-banded armadillo (Dasypus novemcinctus) has recently expanded its range northward to Illinois. With this range expansion comes concern from both wildlife managers and the general public regarding potential incoming pathogens and unknown impacts on native wildlife. My research, conducted during 2018-2020 in southern Illinois, addressed the following 3 objectives intended to provide information regarding this novel species: (1) test for the presence of Trypanosoma cruzi and Mycobacterium leprae, (2) model the potential distribution of armadillos, and (3) attempt several different armadillo capture methods. For Objective 1, I tested roadkilled specimens for T. cruzi and M. leprae, 2 pathogens known to infect humans, using PCR and ELISA, respectively. All 81 samples tested for T. cruzi and all 25 samples tested for M. leprae were negative. The latter case is consistent with the enemy release hypothesis, suggesting armadillos have evaded parasites present in their native environment due to geographical distance. The absence of T. cruzi in the sampled individuals implies dispersing individuals are more robust than those at the center of their range. For Objective 2, I used MAXENT to model potential armadillo distribution in 51 counties in southern Illinois using 39 presence locations. Modeling identified low-intensity development to be the most important predictor of armadillo presence. For Objective 3, I attempted to capture armadillos using spotlighting on roads, staking out burrows, unbaited single-door cage traps, and unbaited double-door cage traps. Based on trap nights per capture, I found the use of double-door cage traps to be the most efficient method. My study will aid in managing colonizing armadillo populations by presenting information regarding dynamics of disease transmission, predicting areas of armadillo presence, and capture methods.

La fragmentation des paysages et des habitats induite par les infrastructures linéaires de transport terrestres est une des principales causes de la perte de biodiversité actuelle. Parmi ces infrastructures, la route est un acteur majeur de fragmentation, d’autant plus qu’elle possède des effets propres dus au trafic circulant qui induit des collisions véhicule-faune et une pollution des paysages. Afin de diminuer ces effets négatifs, des mesures de réduction sont mises en place, notamment des passages à faune permettant de faire traverser la faune de part et d’autre des voies. La route crée aussi de nouveaux habitats potentiels pour les espèces de la petite faune dans des paysages anthropisés et fragmentés. Dans ce mémoire sont démontrées (1) la potentialité d’habitat de différents éléments routiers ; (2) la possibilité de prédire les collisions véhicule-faune afin de positionner au mieux les mesures de réduction ; (3) l’importance de la méthodologie dans l’évaluation de l’efficacité des passages à faune ; et (4) la possibilité d’améliorer les passages à faune existants. Ces résultats permettront d’améliorer les stratégies de défragmentation des paysages
Habitats and landscape fragmentation, caused by linear land transports infrastructures, is one of the major cause for the current loss of biodiversity. Among those infrastructures, road is a major cause of fragmentation, especially as it possess specific traffic-linked effects, which induces wildlife-vehicles collisions and landscape pollution. In order to decrease those negative effects, mitigation measures are taken, among which wildlife crossings, enabling wildlife to cross the road. Road also creates new potential habitats for small wildlife species in anthropogenic and fragmented landscapes. In this essay are shown (1) the potential as habitat of different road-linked elements; (2) the possibility to anticipate wildlife-vehicles collisions in order to improve the position of mitigation measures; (3) the importance of methodology in the evaluation of wildlife crossings effectiveness; and (4) the possibility to improve existing wildlife crossings. Those results will allow improving landscape defragmentation strategies

The topic of badgers in the UK is often a contentious one, dividing opinions and sparking political debate. On one hand, badgers represent an important part of the British ecosystem but on the other a wildlife reservoir of disease implicated in the transmission of bovine tuberculosis (TB) to livestock in the UK. This has prompted strong interest in their population dynamics and epidemiology. Using data from a long-term study of a naturally infected badger population in Woodchester Park, Gloucestershire, this thesis explores a range of capture-mark-recapture (CMR) models to further understand disease and demographic processes. The first section examines long term population dynamics, simultaneously estimating demographic rates alongside their drivers using integrated population models (IPMs). The findings provide new insight into badger demography, highlighting density-dependent mechanisms, vulnerabilities to changing climate and disease prevalence and subsequently how multi-factorial analyses are required to explain fluctuating badger populations. The following sections use multistate models to answer pertinent questions regarding individual disease dynamics, revealing rates of TB infection, progression and disease-induced mortality. A key finding was sex-differences in disease response, with males more susceptible to TB infection. After applying a survival trajectory analysis we suggest sex differences are due to male immune defence deficiencies. A comparative analysis demonstrated similarities between epidemiological processes at Woodchester Park to an unconnected population of badgers from a vaccine study, supporting its continued use as a model population. The final study in this thesis constructs an IPM to estimate disease and population dynamics and in doing so uncovers disease-state recruitment allocation rates, demographic and population estimates of badgers in varying health-states and predicts future dynamics. This model aims to encapsulate the more commonly held notion of populations as dynamic entities with numerous co-occurring processes, opening up avenues for future analyses within both the badger-TB system and possible extensions to other wildlife reservoir populations.

Factors associated with rank position are poorly understood whereas even fewer studies assessed if benefits were associated with increased rank position when resources were unlimited. I assessed whether age, body mass, size, and testosterone levels were important in rank establishment among 132 captive female white-tailed deer (Odocoileus virginianus. I also assessed if the benefit metrics of improved body condition, decreased stress level, and earlier parturition date were related to rank position. Deer in each of 9 study pens had a linear hierarchy with a mean h' of 0.39 (SD = 0.09). Rank position was moderately related to age (P < 0.1) and was strongly related to body mass and size (P < 0.01). There was no relationship between benefit metrics and rank position (P < 0.1). Although increased body mass, size, and age improved rank position there were no benefits associated with increased rank when resources were unlimited.

The reproductive success of American kestrels (Falco sparverius) infected with Trichinella pseudospiralis was significantly reduced when compared with uninfected controls. Egg laying was delayed, and infected females produced fewer eggs than uninfected controls. Infected females were more aggressive and copulated less frequently. Egg breakage among infected birds was greater than among controls. Infected females tended to lay eggs outside the nest box. Infected females did not incubate as frequently as the controls, thus accounting for the higher prevalence of embryo mortality among these birds. The above effects translated into a mean production of 2.1 hatchlings per control pair and 0.6 per infected pair of kestrel. Both in breeding and non-breeding kestrel, T. pseudospiralis infections gave rise to a general decline in mobility. Behavioural effects are primarily attributable to the presence of muscle larvae. The parasite showed no predilection for specific muscle groups.

Elephants are cognitive species that exhibit many types of learning. Associative, social, and insight learning have been investigated with elephants, but one of the simplest forms, habituation, has not. As an individual learns that a stimulus is neither harmful nor beneficial, it will decrease its response to the stimulus through the process of habituation. Elephants possess a well-developed sensory system and may habituate to stimuli that could be used for enrichment and/or management. The aim of this study was to examine the habituation process of elephants in response to repeated presentations of two auditory stimuli –buzzing by a disturbed beehive and the sound of banging on pots and pans, as these sounds invoke alert and avoidance behaviors in wild elephants as part of humanelephant conflict mitigation. I hypothesized that elephants would initially exhibit strong reactions to both sounds, but these responses would diminish over repeated trials. I also hypothesized that their responses to the bee sound would decrease more slowly than to the pot/pans sound because bee buzzing represents a biological cue that a threat is nearby. This study was conducted using four female African elephants (Loxodonta africana) at the Nashville Zoo. Elephants received each stimulus for a 10-day period. On the first sound presentation, the elephants reacted by exhibiting distress, avoidance, and vigilance behaviors. Over repeated presentations, the elephants stopped responding to the stimuli, suggesting habituation had occurred. They also seemed to generalize their habituation between the first and second sound, resulting in a faster habituation to the second sound. Although a preliminary study, the results suggest that elephants learn which stimuli are non-threatening and subsequently stop responding to them, most likely through habituation. Specifically, the elephants habituated to bee buzzing and banging pots and pans, two deterrents used to stop elephants from entering farmlands and eating crops. Habituation is a major concern for the development of effective human-wildlife conflict mitigation and zoo enrichment programs. The results from this study indicate that habituation is an important learning process that should be considered during the implementation of captive and wildlife management, even for highly intelligent species such as elephants.

The conservation benefits of animals in captivity are limited to education and genetic preservation. However, where species or sub-species are critically endangered, the release of captive bred animals into the wild can be used as a strategy to supplement existing populations or to form new founder populations. Cheetahs Acinonyx jubatus born in captivity have no prior experience of survival in wild circumstances. Captive bred cheetahs are currently the greatest source of individuals. This project worked in conjunction with IUCN reintroduction guidelines and pre-existing recommendations in an attempt to develop an ideal methodology of reintroducing captive bred cheetah into the wild. Three captive bred cheetahs, one female and two males, were reintroduced onto Makulu Makete Wildlife Reserve, a predator proofed reserve in the Limpopo province of South Africa, as part of an experimental rehabilitation project. The cheetahs had to lose their homing instinct, be habituated to researchers, become accustomed to eating venison, chewing skin, infrequent large meals and strength development within the three months spent in the enclosures. The cheetahs were habituated to the field researchers on foot and to research vehicles for ease of monitoring. A soft release methodology was used to ease the cheetahs into the environment. Upon release they were tracked twice daily to observe behavior and interaction with their environment. The duration of the project was 20 months which includes enclosure time. The establishment of a home range indicated that the resource need of the cheetahs was satisfied. Eight habitat types were identified in the study area and all cheetahs encompassed part of each in their home range. Though the hunting instinct was present in all the cheetahs, the appropriate hunting techniques and prey selection had to be learned overtime. There was no difference between what was stalked and what was caught. From the observed kills, prey weight ranged from small <40 kg to medium <160 kg. This weight range is comparable to wild cheetahs that select prey within the same range. Each cheetah hunted every four to five days and consumed three to five kilograms of meat per day. Nine prey species were identified, two of which were not detected during direct observations. In the collection of scat, the trained dog found approximately a scat per hour while each direct observation by the researchers took approximately 10 hours. These captive bred cheetahs had to learn how to hunt and how to select appropriate prey thus addressing learned behavior versus instinct. Given the frequency and intensity of injuries sustained and the extensive human influence in the form of veterinary treatment, the reintroduction was not a success. However the techniques developed and modified are relevant for future endeavors‟.
Dissertation (MSc)--University of Pretoria, 2011.
Animal and Wildlife Sciences
unrestricted

Dissertação de Mestrado Integrado em Medicina Veterinária
Tuberculosis (TB) is a cause of significant morbidity and mortality in both domestic and wild animals, and in humans, remaining a major global public health issue, especially in developing countries as India, the one with the highest TB burden in the world. Infection by Mycobacterium tuberculosis in rescued sloth bears represents a typical case of spillover infection resulting from a prolonged and close cohabitation with infected humans, after being forcibly and illegally poached from the wild as cubs and trained to behave as entertainers in the streets of India. The stress, traumas and hardship that the animals endure, also play a role in the development of the disease, as their immune system is usually compromised. As in the case of many other wild species, there is critical lack of accredited tests for TB screening in sloth bears. This way, it is of major importance to identify the diagnostic assays that have the highest sensitivity and specificity, in order to achieve a reliable diagnosis and implement a standard methodology. Various diagnostic methods were used to examine 15 presumable positive animals at Bannerghatta Bear Rescue Centre, in the Karnataka state, India, and their sensitivity was calculated, based on the results. M. tuberculosis infection was strongly suspected ante-mortem, based on the animals’ background as “dancing bears” and the revelation of several positive diagnostic results during their lives. Fourteen out of these 15 bears died between 2008 and 2013 and their death certificate reported post-mortem tuberculosis confirmation. Considering the previous statement, it was not possible to calculate the specificity and, thus, obtain a global and underlying insight about the tests in question. Post-mortem methods present, in general, the highest sensitivity results. According to this study, the ante-mortem methods with the most promising results were the ones belonging to the indirect assay category, which are based upon the animal’s immune response (both cellular and humoral) instead of the organism detection (as in culture, PCR and microscopy). A sensitivity increment was achieved when two or three tests from the three major test categories (direct, indirect based on cellular immunity and indirect based on humoral immunity) were used in parallel testing. The highest sensitivity achieved by multiple testing (93.3%) was the same for both double and triple parallel combinations, showing, in this case, no advantages in using combinations of three tests, instead of two, in terms of sensitivity increment.
RESUMO - Infeção por tuberculose em ursos-beiçudos (Melursus ursinus) em cativeiro - Um estudo piloto em estratégias diagnósticas - A Tuberculose (TB) provoca significativos índices de morbilidade e mortalidade em animais domésticos e selvagens, e em seres humanos, representando um considerável problema de saúde pública, sobretudo em países em vias de desenvolvimento, como a Índia, neste momento aquele com a incidência mais elevada de tuberculose em todo o mundo. A infeção pelo Mycobacterium tuberculosis em ursos-beiçudos em cativeiro, traduz a típica ocorrência de infeção acidental, resultando da prolongada e próxima co-existência com seres humanos infectados, após serem forçada e ilegalmente capturados do seu habitat natural, enquanto crias, e treinados para se comportarem como animadores nas ruas da Índia. O stress, traumas e adversidades passados por estes animais, são fatores no desenvolvimento desta doença, uma vez que o seu sistema imunitário se encontra normalmente comprometido. Como em muitas outras espécies selvagens, existe uma enorme lacuna no que diz respeito a métodos de testagem de tuberculose em ursos-beiçudos. Deste modo, é da maior importância definir os testes que possuem a sensibilidade e especificidade mais elevadas, potenciando a obtenção de um diagnóstico fiável e de uma metodologia padronizada. Diversos métodos diagnósticos foram aplicados em 15 animais presumivelmente positivos e residentes no Bannerghatta Bear Rescue Centre, em Karnataka, na Índia, e a sua sensibilidade foi calculada, com base nos resultados obtidos. A infeção por M. tuberculosis era fortemente suspeitada ante-mortem, com base na proveniência e passado dos animais como “dancing bears” e em vários resultados diagnósticos positivos durante a sua vida. Catorze destes 15 ursos morreram, entre 2008 e 2013, e o seu relatório de óbito reportou a confirmação post-mortem de tuberculose. Desta forma, não foi possível calcular a sua especificidade e, assim, obter um conhecimento global e aprofundado dos testes em questão. Os testes post-mortem apresentam, em geral, as sensibilidades mais elevadas. Segundo este estudo, os testes ante-mortem com os resultados mais promissores pertencem à categoria de métodos indiretos, baseados na deteção da resposta imunitária do próprio animal (tanto celular como humoral), ao invés da deteção do organismo (como em cultura, PCR e microscopia). Um aumento da sensibilidade foi conseguido quando dois ou três testes das três principais categorias exploratórias específicas (diretos, indiretos baseados em imunidade celular e indiretos baseados em imunidade humoral) foram usados em testagem paralela. A sensibilidade mais elevada obtida por uma combinação de testes (93.3%) foi a mesma para combinações paralelas duplas e tripla, demonstrando, neste caso, que não existem vantagens em combinar três testes, em vez de dois, no que toca ao aumento de sensibilidade.
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With the increased use of captive breeding for species conservation and for wildlife research there is a rising concern over potential effects of captivity on animal populations. Changes arising within populations as a result of captivity could reduce their ability to survive and reproduce after release into the wild, or make research on captive specimens incomparable to their wild counterparts. Research into the effects of captive breeding is relatively new and is often hampered by the difficulty of separating origin and rearing environment effects on animals. The overall aim of this study was to determine the effects of captivity on the morphology, nesting success and nestling growth of a common wildlife model, the American kestrel (Falco sparverius). From 2006 to 2009 data were collected on wild and captive kestrel pairs, including adult size, egg volume, fertility, clutch initiation date, hatching success, and nestling survival. From 2007 to 2009, repeated measures of nestlings were taken to determine growth rates. To separate the effects of origin and rearing environment, whole clutches were cross-fostered between pairs in each environment and compared to control clutches. In 2009, captive-bred and wild kestrels reared in captivity (F1 birds) from the 2006 to 2008 cross-fostered clutches were paired in combinations (captive / captive, captive male / F1 female, F1 male / captive female, F1 / F1) and data were collected on adults, nesting success and nestling growth. Results of the combined studies suggest that captive birds and eggs are significantly larger than those in the wild, and that F1 results are intermediate between the two. When comparing reproductive variables, wild clutches had significantly higher fertility and nestling survival than the other groups. Fertility and hatchability were similar between captive and F1 clutches, but nestling survival was greater in captive clutches. Overall, nest productivity was highest in wild pairs and lowest in F1 pairs. Reproductive variables were significantly affected by sex in F1 pairings, with F1 males exhibiting greater nest failure and lower productivity than captive males regardless of female mate. Nestling growth rates differed significantly between captive, wild and F1 birds with captive birds generally having faster growth rates, though asymptotic size did not differ between groups. Carotenoid concentrations in plasma did not vary greatly between groups, though external flesh color in kestrels differed between environment and sex; wild kestrels had significantly higher color scores than captive birds, and males had higher scores than females. Overall, rearing environment had a greater impact on adult kestrel size, nestling growth rates and nesting success than origin, though sufficient differences were noted between captive and F1 birds to suggest that some level of selection in captivity had occurred.
L'utilisation croissante de la reproduction en captivité pour les espèces en danger et pour l'étude de la faune suscite davantage d'intérêt quant aux effets potentiels de la captivité sur les populations animales. Des changements engendrés par la captivité pourraient réduire la capacité des animaux de survivre et se reproduire suite à leur réintroduction dans le milieu naturel, ou rendre les résultats d'études sur les spécimens captifs inapplicables à leurs homologues sauvages. L'étude des effets de la reproduction en captivité est relativement nouvelle et souvent entravée par la difficulté de distinguer les effets environnementaux des effets génétiques sur les animaux. L'objectif principal de la présente étude était de déterminer les effets de la captivité sur la morphologie, le succès reproductif et la croissance des oisillons chez une espèce-modèle commune, la crécerelle d'Amérique (Falco sparverius). De 2006 à 2009, des données ont été recueillies sur des couples de crécerelles sauvages et captives, dont la grosseur des adultes, le volume des œufs, la fertilité, la date d'initiation des couvées, le taux d'éclosion et la survie des oisillons. De 2007 à 2009, des mesures à répétition ont été prises pour évaluer les taux de croissance des oisillons. Afin de séparer les effets environnementaux des effets génétiques, des couvées entières ont été échangées entre couples dans chacun des milieux et comparées à des couvées de contrôle. En 2009, des individus nés en captivité ainsi que des individus sauvages élevés en captivité (génération F1) issus des couvées échangées de 2006 à 2008 ont été accouplés selon toutes les combinaisons possibles (mâle captif / femelle captive, mâle captif / femelle F1, mâle F1 / femelle captive, mâle F1 / femelle F1) et des données ont été recueillies sur les adultes, le succès reproductif et la croissance des oisillons. L'ensemble des résultats suggère que les oiseaux captifs ainsi que leurs œufs sont significativement plus gros que leurs homologues sauvages, la génération F1 étant intermédiaire. Quant au succès reproductif, la fertilité des couples sauvages et la survie de leurs oisillons étaient supérieures aux autres groupes. La fertilité et le taux d'éclosion étaient semblables entre les couvées F1 et captives, bien que la survie des oisillons ait été supérieure chez ces dernières. La productivité globale était la plus élevée chez les couples sauvages et la plus faible chez les couples F1. Les mâles F1 avaient un taux d'échec de nidification plus élevé et une productivité globale moins élevée que les mâles captifs peu importe l'origine de la femelle. Des différences significatives dans les taux de croissance ont été observées entre oisillons captifs, sauvages et F1 : la croissance était généralement plus rapide chez les oisillons captifs malgré que la grosseur asymptotique ne variât pas entre les groupes. Les concentrations de caroténoïdes dans le plasma ne variaient pas de façon significative entre les groupes; cependant des différences dans le teint de la chair ont été observées selon le milieu et le sexe: les crécerelles sauvages avaient le teint plus foncé que les crécerelles captives; et les mâles plus foncé que les femelles. Dans l'ensemble, le milieu d'élevage a eu un impact plus prononcé sur la grosseur adulte des crécerelles, les taux de croissance des oisillons et le succès reproductif que l'origine génétique, bien que suffisamment de différences aient été constatées entre individus captifs et F1 pour suggérer qu'un certain niveau de sélection en captivité a eu lieu.

Suivant les récents développements historiographiques dans le champ de l’histoire des animaux, cette thèse aborde l’histoire des jardins zoologiques du côté des bêtes elles-mêmes. Elle examine donc non seulement les politiques humaines de gestion des animaux de zoo, mais aussi leurs influences sur les corps et les comportements des animaux, et leurs évolutions mutuelles.

L’examen débute à la fondation du jardin zoologique, c’est-à-dire au moment de la création de la ménagerie parisienne du Jardin des Plantes en 1793, et se centre, outre sur cette institution originelle, sur le jardin zoologique de Londres, créé en 1828, et celui d’Anvers, fondé en 1843.

Pour écrire l’histoire des animaux de zoo, la thèse mobilise une méthodologie qui mêle des indicateurs descriptifs – témoignages sur les corps et comportements animaux, sur les infrastructures de captivité, sur les soins et l’alimentation dont bénéficient les bêtes, – et quantitatifs – étude sérielle sur la longue durée des entrées et sorties d’animaux ainsi que des longévités des primates et des grands félins. L’évolution de ces différents indices est examinée au sein d’un cadre chronologique régi par les politiques des gestionnaires de zoos. Ainsi, après une première partie débutant à la fondation des institutions étudiées, une seconde s’ouvre au début du XXe siècle, alors que le marchand allemand Carl Hagenbeck ouvre en 1907 un zoo privé à Stellingen, près de Hambourg, qui popularise un nouveau type de présentation des bêtes, par lequel celles-ci sont exposées durant la journée en plein air et séparées du public par des fossés. Enfin, une troisième partie s’amorce à partir des années 1950, lorsque les zoos s’attellent à la mise en œuvre d’une nouvelle fonction, celle de protection des espèces ex situ, s’ajoutant aux trois autres traditionnellement endossées (récréative, éducative, scientifique).

L’examen des vies des bêtes sous l’influence des politiques humaines aboutit à élaborer une nouvelle chronologie des zoos, qui distingue un long XIXe siècle, dévoreur de vies animales ;une seconde phase, hygiéniste, à partir de l’entre-deux-guerres, caractérisée par les volontés des gestionnaires de rationaliser les conditions de captivité, mais dont les incidences sur les vies animales sont toutefois réduites ;enfin une troisième, attentive aux animaux, du milieu des années 1970 à nos jours, qui permet la naissance d’une nouvelle économie animale des zoos, qui voit l’atténuation des ponctions en milieu naturel pour la plupart des taxons (spécifiquement les mammifères et les oiseaux).

Ce faisant, l’étude met aussi en évidence, à rebours des discours finalistes de l’historiographie officielle, des permanences, immanentes à la captivité des animaux dans le contexte des zoos. Il s’agit d’une part de l’expression par les bêtes de comportements anormaux dans des proportions qui dépassent le niveau anecdotique ;il s’agit d’autre part de l’approvisionnement en milieu naturel, qui, bien qu’en déclin dans le contexte du bouleversement de l’économie animale, persiste jusqu’à nos jours en nombre important pour les taxons moins considérés, soit les poissons et les invertébrés, et se réincarne en de nouveaux avatars pour les autres (ponctions dans le cadre des programmes de protection, captures scientifiques, )./

Following in the footsteps of recent developments in the French historiography, this dissertation aims at balancing the attention given to humans and animals. The research therefore focuses on human policies concerning the management of animals kept in zoological gardens, as well as on their consequences on the bodies and behaviors of animals, and on mutual influences between humans and animals.

The study begins with the birth of the zoological garden, i.e. the creation of the Jardin des Plantes Menagerie in 1793, and focuses on this institution as well as on the London Zoo, created in 1828, and the Antwerp Zoo (1843).

In order to write the history of zoo animals, the method uses both descriptive indicators – testimonies on animals bodies and behaviors, on captive environments, on animal cares, handling and food, – and quantitative indicators – long-term study of the arrivals and departures, births and deaths of animals and of the longevity of Primates and Pantherinae in captivity. The evolution of these indicators takes place in a chronological framework based on the policies designed to manage zoo animals. The first part begins with the foundation of the zoological gardens. The second one starts at the beginning of the 20th century, when German dealer Carl Hagenbeck opened a zoo in Stellingen, near Hamburg (1907) which popularized a new way to display the animals, in open-air enclosures separated from the public by ditches. The third part starts in the 1950’s, when zoos implemented a new function, one of ex situ conservation, in addition to their other traditional recreative, educative and scientific missions.

This study of animal lives under human influence results in a new chronology of zoological gardens, discerning a long 19th century, that consumed animal lives, a second phase, hygienist, from the interwar period, marked by the managers’ willingness to rationalize the conditions of captivity, without much influence on animals lives and longevity, and a third one, from the mid-1970’s to the present time, characterized by increased attention to zoo animals and their well-being, allowing the birth of a new animal economy of zoological gardens, by which in situ captures decline for most taxa (specifically mammals and birds).

The dissertation also shows, in opposition with the finalist discourses of the official historiography, somes continuities, immanent to animal captivity in the context of zoological gardens. Abnormal behaviors in animals especially appear in proportions exceeding the anecdotal level. Another important phenomenon pointing to continuities is the collecting in the wild which, although it declined at the same rhythm that the new animal economy developed, has persisted to this day, profusely for the least considered taxa (fishes and invertebrates), and resurfacing in new iterations for mammals, birds, reptiles and amphibians (capture for purposes of conservation, for scientific collecting, ).
Doctorat en Histoire, art et archéologie
info:eu-repo/semantics/nonPublished

In their native habitat of Central and South America, capuchin monkeys (Cebus) spend 45% to 55% of their day foraging and a further 20% travelling. Once these monkeys are introduced into captive environments their diets are selective, seasonal and presented to them by their keepers. The captive environment often leads to various behavioural abnormalities and compensatory behaviours or stereotypies. To address this issue, environmental enrichment can be employed to reduce, cure or prevent such an occurrence. Enrichment can reduce stress, while increasing animal well-being and health in captivity. Despite previous work a better understanding of enrichment, for most neo-tropical primate species, is necessary, in order to improve their captive lifestyles. Feeding of captive primates is more complex than providing a balanced nutritional diet as it must also meet their ethological needs. The manipulation of the presentation of the diet has been shown to significantly decrease the incidence of resting, while significantly increasing the incidence of playing, grooming, foraging and manual manipulation of dietary items. Eleven capuchin monkeys were presented with four different feeding treatments (i.e. cut food presented in bowls, cut food presented around the enclosure, uncut food presented around the enclosure and novel feeding devices presented around the enclosure) from December 2007 until May 2008. At the start of every month one of three feeding treatments was introduced with the cut food in bowls feeding treatment interleaved between the treatments. The different feeding treatments required the monkeys to search for their food, break-up their food into manageable sizes, and obtain food in touch-, tool- and manipulative-dependent methods in order to allow the monkeys an opportunity to display increased activity more in line with their wild conspecifics. The capuchins displayed a period of intense foraging directly following feeding. This period significantly increased (from 44 to 121 min.), along with foraging events and the proportion of time spent foraging, which was more in line with their wild conspecifics. In addition, the frequency of occurrence and the proportion of time spent on locomotion and resting was shown to decrease. Also, abnormal behaviours ceased to occur during the study. Environmental enrichment is a useful tool for providing stimulation, redistributing activity levels more in line with wild conspecifics and to combat abnormal and compensatory behaviours.

This Research investigates the potential impacts that free-ranging lions have within a small (<100 000 hectare), enclosed protected area, and it also investigates the subsequent challenges to the managers of areas such as these. A comprehensive literature review reveals that the smaller the protected area, the more intensively it needs to be managed via active adaptive management, because perimeter fences do not allow for immigration and emigration. The consequences of this are over-population; inbreeding depression; the decline of prey and other predator species; conflict with neighbouring communities as a result of break-outs; and, in some cases, the spreading of intra- and interspecies disease. Lions are very proficient breeders and, in all cases investigated, reserves exceeded their local carrying capacity within a relatively short period of time. A range of management interventions can potentially achieve short- and/or long-term reserve objectives. These interventions include relocation, contraception, hunting and artificial takeovers. These interventions are described in terms of the preparation required, the biological consequences and the sociological influences.
Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2007.

abstract: The Committee on Rare and Endangered Wildlife Species (CREWS) of the U.S. Fish and Wildlife Service (FWS) made important and lasting contributions to one of the most significant pieces of environmental legislation in U.S. history: the Endangered Species Act of 1973 (ESA). CREWS was a prominent science-advisory body within the U.S. Department of the Interior (DOI) in the 1960s and 1970s, responsible for advising on the development of federal endangered-wildlife policy. The Committee took full advantage of its scientific and political authority by identifying a particular object of conservation--used in the development of the first U.S. list of endangered species--and establishing captive breeding as a primary conservation practice, both of which were written into the ESA and are employed in endangered-species listing and recovery to this day. Despite these important contributions to federal endangered-species practice and policy, CREWS has received little attention from historians of science or policy scholars. This dissertation is an empirical history of CREWS that draws on primary sources from the Smithsonian Institution (SI) Archives and a detailed analysis of the U.S. congressional record. The SI sources (including the records of the Bird and Mammal Laboratory, an FWS staffed research group stationed at the Smithsonian Institution) reveal the technical and political details of CREWS's advisory work. The congressional record provides evidence showing significant contributions of CREWS and its advisors and supervisors to the legislative process that resulted in the inclusion of key CREWS-inspired concepts and practices in the ESA. The foundational concepts and practices of the CREWS's research program drew from a number of areas currently of interest to several sub-disciplines that investigate the complex relationship between science and society. Among them are migratory bird conservation, systematics inspired by the Evolutionary Synthesis, species-focused ecology, captive breeding, reintroduction, and species transplantation. The following pages describe the role played by CREWS in drawing these various threads together and codifying them as endangered-species policy in the ESA.
Dissertation/Thesis
Ph.D. Biology 2011

Bovine tuberculosis is a global cause for concern in livestock, free-ranging wildlife, zoological collections and the human population. Large amount of time, effort and resources are spent on its diagnosis and control methods. This study was aimed at determining the sensitivity and specificity of the IS6110 specific PCR test on formalin fixed, paraffin embedded (FFPE) tissue blocks, compared to that of the gold standard method culture and to differentiate M. bovis from other members of the M. tuberculosis complex using the RD4 region of difference specific PCR test. A total of 141 FFPE tissue blocks of wild animals from game reserves, the National Zoological Gardens and routine tuberculosis (TB) surveys in Kruger National Park were tested. Among the 50 known TB positive samples (35 M. bovis culture positive, twelve M. tuberculosis culture positive and three diagnosed tuberculosis positive on histopathology examination) the IS6110 PCR had an overall sensitivity of 22%. The positive predictive value of the IS6110 test (91.67%) was quite high implying that although sensitivity was low, one can be highly confident that a positive test result is a true reflection of the positive disease status. The overall sensitivity of the RD4 PCR was 20%. The positive predictive value of the RD4 test (41.67%) was low, implying that a positive test result may be unreliable. The sensitivities of the M. tuberculosis and M. bovis culture positive samples were compared and a significant difference was noted. Sensitivities of the IS6110 and RD4 assays in M. tuberculosis culture positive samples were 66.67% and 33.33%, respectively; sensitivities of the IS6110 and RD4 assays in M. bovis culture positive samples were 8.57% and 17.14%, respectively. Difference in bacterial load in tissues infected with the two mycobacterial species may account for this finding (i.e. M. bovis infections have a lower bacteria load). Of the 91 known TB negative samples, the specificity of the IS6110 (98.90%) and RD4 (84.62%) PCR tests were high, but the negative predictive values of 69.67% and 65.81%, respectively, suggest that the probability of negative test results being incorrect still exists. The resultant sensitivity was increased when parallel interpretation was applied to histopathology examination and the IS6110 or RD4 PCR tests and when applied to the IS6110 and RD4 PCR tests. Both histopathology examination and PCR tests produce rapid results and their combination can be used in routine diagnostics. The RD4 PCR assay was unable to distinguish M. bovis from other members of the MTB complex and based on the findings of this study the RD4 PCR cannot add value to the diagnosis of suspect tuberculosis samples at this stage, but successful troubleshooting relating to 1) extraction method, 2) DNA inhibitors, 3) contamination and 4) multisampling protocol, may enable its use in future.
Dissertation (MSc)--University of Pretoria, 2013.
gm2014
Veterinary Tropical Diseases
Unrestricted

The oribi Ourebia ourebi is probably South Africa's most endangered antelope. As a specialist grazer, it is extremely susceptible to habitat loss and the transformation of habitat by development. Another major threat to this species is illegal hunting. Although protected and listed as an endangered species in South Africa, illegal poaching is widespread and a major contributor to decreasing oribi populations. This study investigated methods of increasing oribi populations by using translocations and reintroductions to boost oribi numbers and by addressing overhunting. Captive breeding has been used as a conservation tool as a useful way of keeping individuals of a species in captivity as a backup for declining wild populations. In addition, most captive breeding programmes are aimed at eventually being able to reintroduce certain captive-bred individuals back into the wild to supplement wild populations. This can be a very costly exercise and often results in failure. However, captive breeding is a good way to educate the public and create awareness for the species and its threats. Captive breeding of oribi has only been attempted a few times in South Africa, with varied results. A private breeding programme in Wartburg, KwaZulu-Natal was quite successful with the breeding of oribi. A reintroduction programme for these captive-bred oribi was monitored using radio telemetry to assess the efficacy of such a programme for the oribi. As with many reintroductions of other species, this one was not successful and resulted in many mortalities. However, many variables have been identified that contributed to the failure of this programme and they can be adapted to increase the chances that captive breeding and reintroduction be a viable conservation tool for oribi. Besides captive breeding and reintroductions, the translocation of wild animals can also be effective in sustaining wild populations. Translocations usually appreciate a higher rate of success than reintroductions. A translocation of wild oribi was attempted in this study. This involved the translocation of four males and eleven females and a year-long monitoring programme. This translocation proved to be extremely successful in establishing a sustainable wild population of oribi with few mortalities and several births. However, such translocations can only be attempted when there is suitable habitat and high security from poaching. One source of oribi for the translocation part of the study was from a housing estate that had a high density population of oribi. The existence of such a thriving population of animals on what is often a controversial type of development led to a case study investigation. Housing developments are increasing in size and in numbers in South Africa, and are rarely held accountable for the destruction caused to local habitat or wildlife. This case study used this housing estate as an example of development and conservation cooperating and enjoying the success of a thriving population of endangered oribi. Many variables have been identified that contribute to the success of this venture and that could be used as a requisite for planned housing developments in the future. In particular, clustering of houses to leave open wild areas that are managed ecologically. Finally, the issue of illegal hunting was identified as a very serious threat to oribi conservation. Using surveys, residents of rural settlements and landowners were probed about this issue so that a demographic profile of hunters could be created. This profile could then be used to make recommendations on ways to slow the spread of illegal hunting as well as educate hunters and conservation laws. The results showed that many rural people hunt on a regular basis and most hunt with dogs. It also III showed that there is a high level of ignorance amongst these people on the laws concerning conservation and wildlife species. It was concluded from this study that captive breeding and reintroduction of oribi might be a way to enhance wild populations, but might be more useful in creating public awareness. Translocation, on the other hand, was extremely successful as a way of saving doomed populations and augmenting stable ones. However, it requires suitable and protected habitat. Using housing estates as havens for endangered species is an option but only if the right legislation is passed and cooperation demanded with large portions of land remaining undeveloped. Addressing illegal hunting is the most important, and possibly the most difficult hurdle for oribi conservation besides habitat destruction. Finally, recommendations for oribi conservation and management were made based on the results from this study.
Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2006.