Thesis (MSc (Phytomedicine))--University of Pretoria, 2006. / Includes bibliographical references.

Thesis (M.S.)--University of Missouri--Columbia, 2004. / "May 2004." Typescript. Includes bibliographical references (leaves 261-265). Also issued on the Internet.

Proefschrift--Utrecht. / Vita. Summary in English. "Stellingen": [2 ℓ.] inserted at end. Includes bibliographical references.

Thesis (M.S.)--University of Missouri--Columbia, 2004. / Typescript. Includes bibliographical references (leaves 261-265). Also issued on the Internet.

Master of Science / Department of Clinical Sciences / Bradley J. White / Castration and dehorning are common husbandry practices in the United States. The objective of this research was to evaluate behavioral responses to these painful procedures. Two studies were conducted using three dimensional accelerometers to measure behavioral differences in cattle following dehorning and castration. The first study evaluated the potential of different analgesics to mitigate pain following castration and dehorning compared to negative controls as judged by behavioral measures. Holstein-Fresian calves given one of three different analgesic protocols (sodium salicylate, a combination of xylazine, ketamine and butorphanol, and both treatments together) or received no analgesia. All cattle were surgically castrated and dehorned. All treatment groups spent more time lying down and less time walking in the post-surgery than pre-surgery, and significant interactions were found between treatment and time relative to surgery (P<0.05). The second study evaluated behavioral changes following castration and dehorning performed independently or concurrently when compared to a negative control (no surgery). Accelerometers recorded behavior in Holstein-Fresian calves in which differing surgical procedures were performed: castration only (CO), dehorning only (DO), castration and dehorning (CD), and no surgical procedure performed (CON). Behavioral data was measured for 6 days following surgery. Significant interactions were found between treatment and time (P<0.05) in both walking and lying behavior. Calves that were dehorned and castrated spent less time walking one day after the procedure compared to controls, but very few other behavioral differences were identified. These studies illustrate that cattle behavior changes following painful procedures such as castration and dehorning.

Master of Science / Department of Clinical Sciences / Daniel Thomson / A total of 400 head of naturally parasitized commercial feedyard cattle (subset of 40 hd/pen; 10 pens) were utilized to compare trade name ivermectin pour-on and a generic ivermectin pour-on. The efficacy of each product was measured by obtaining rectal fecal egg counts on day 0 and day 14 using a Modified Wisconsin sugar float with centrifugation from rectal fecal samples and calculating fecal egg reduction post treatment. There were no differences in net egg count reduction between treatments (P= 0.15) at 14 days post-treatment application. Regardless of treatment, only 26% of animals had a fecal egg count reduction of >90% and only 35% achieved a FECR of >80% which is low considering 90% reduction is the accepted efficacy level. Cattle treated with the generic pour-on had improved average daily gains (ADG) compared to cattle treated with the trade name pour-on P = 0.02. This study demonstrated decreased efficacy of both products with a FECR of less than 90% within a commercial feedyard environment.

To investigate the role of experience in interspecific emotion perception, humans with various levels of dog experience provided their interpretations of emotion in dogs using the dogs' visual signals (body language). First, a set of 30 short videos of dogs was assembled, and a panel of eight behavioral experts provided ratings and categorizations of the depicted dogs' emotions. Based on the emotional valence and level of agreement in their ratings, a subset of 16 videos was selected for inclusion in a web survey made available to the general public. The wide range of dog experience found within the final sample of 2,163 participants allowed for various means of assessing the effect of experience on interspecific emotion perception. Responses were analyzed according to broad experience categories (never owned a dog, dog owner, dog professional for less than ten years, dog professional for ten or more years), as well as experience-related variables among the dog owners. Effects on emotion perception were found using all experience-related measures. The level of experience with dogs predicted both ratings and categorizations of emotion in dogs. The role of experience was more evident for emotional displays that had been judged by experts to be clearly negative than clearly positive. Less-experienced individuals tended to provide more positive emotion ratings of negatively-valenced behavior than more-experienced individuals. In addition, they were more likely to diverge from expert evaluations and categorize such behavior as happy, rather than fearful. Furthermore, as previous education about dog body language increased among more-experienced individuals, perceptions became more aligned with expert evaluations, while perceptions of individuals who had never owned a dog became less aligned. Lastly, differences among the experience groups in emotion ratings and categorizations were reflected in differences in observational focus. Individuals with greater experience were more likely to attend to the ears of the dog and less likely to attend to the legs and tail. In sum, individual differences in dog experience were associated with the perception of emotion in dogs, suggesting experience-dependent development of these abilities. These findings are among the first to provide evidence for experience-associated variation in interspecific emotion perception and may illustrate a novel strategy for exploring the development of individual differences in emotion perception in humans.

Thesis (Ph. D.)--Washington State University. / Includes bibliographical references.

The seasonal fluctuations in the worm burdens of pigs, sheep, cattle, impala and blesbok exposed to infestation on improved or natural pastures in the Transvaal were determined. The prevalence of infestation in pigs slaughtered at the Pretoria Municipal Abattoir and in impala near Pafuri and blesbok at Badplaas was also established. Sheep, goats and cattle were successfully artificially infested with a number of nematodes of impala origin and sheep with those of blesbok origin. The various methods used to determine the seasonal incidence of helminth parasites are discussed and the wastage of valuable material criticised when complete recoveries of both internal and external parasites are not attempted at each necropsy. Host specificity and the distribution of parasites according to climate and the zoogeographical distribution of their hosts are discussed and the epizootiology of the major nematode genera parasitizing sheep, cattle, impala and blesbok in the Transvaal is determined. The phenomenon of arrested development in nematodes is compared with that of diapause in insects and measures to control helminth parasites 1n domestic stock and antelope in the Transvaal are suggested. / Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1980.

Thesis (M.S.)--West Virginia University, 2010. / Title from document title page. Document formatted into pages; contains vii, 56 p. : col. ill. Vita. Includes abstract. Includes bibliographical references (p. 35-36).