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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.
21

Comparison of F1 cows sired by Brahman, Boran and Tuli bulls for reproductive, maternal, and cow longevity traits

Maiga, Assalia Hassimi 25 April 2007 (has links)
Birth weight (BW) (n =1277) and weaning weight (WW) (n = 1090) of calves, pregnancy rate (PR) (n = 1386), calf crop born (CCB) (n = 1386), calf crop weaned (CCW) (n = 1294), cow’s weight at palpation (CW) (n = 1474) and cow body condition score (BCS) (n = 1473) were evaluated from 1994 to 2006 in 143 F1 cows sired by Brahman (B), Boran (Bo) and Tuli (T) bulls and born to Angus and Hereford cows. Mouth scores (MS) (n = 139) were assigned to the remaining cows in 2004 and 2005. Fixed effects included sire breed of cow, dam breed of cow, and calf’s birth year/age of cow; random effects included cow and sire of cow. BW and WW were evaluated using the same model and adding gender for both and age for WW. All two-way interactions were tested for significance. Calf’s birth year/age of dam was significant for all traits (P < 0.05) except WW. BW for calves out of F1 B, Bo and T bulls were 35.08, 34.76 and 34.87 kg, respectively, and were not different. WW differed (P < 0.05) for calves out of F1 B, Bo and T cows (235.87, 221.10 and 208.35 kg, respectively). PR (0.922, 0.955 and 0.936, respectively), CCB (0.881, 0.931, 0.890, respectively), CCW (0.848, 0.898 and 0.869, respectively), did not differ among F1 B, Bo and T cows. CW when cows were 8- or 9-year old were 600.78, 514.63 and 513.14 kg, respectively, for F1 B, Bo and T cows, with those sired by B being heaviest (P < 0.05). BCS for B-, Bo- and T-sired cows were 5.23, 5.48 and 5.18, respectively, with F1 Bo cows having highest scores. Higher MS (P < 0.05) were assigned to Bo and B-sired cows (0.95 and 0.94, respectively) compared to T-sired cows (0.78), when both broken and solid incisors were scored 1, and smooth scored 0. When both smooth and broken were scored 0, and solid were scored 1, higher scores were assigned to B- (0.53) compared to T-sired cows (0.24), the Bo-sired cows being intermediate. Higher reproductive rates were found for Boran-sired cows, but Brahman-sired cows weaned heavier calves.
22

Comparison of Dorper and Polypay as maternal sire breeds for reduced input lamb production /

Haas, Joel D. January 1900 (has links)
Thesis (M. Ag.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 20-21). Also available on the World Wide Web.
23

Canine design creating the modern dog park /

Doyle, Don Richard. Lau, Tin-Man. January 2006 (has links) (PDF)
Thesis(M.I.D.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references.
24

An exploratory analysis of the emergence and implications of Breed Specific Legislation: knee-jerk reaction or warranted response? /

Huitson, Niki Rae. January 2005 (has links)
Thesis (M.A.) - Simon Fraser University, 2005. / Theses (School of Criminology) / Simon Fraser University.
25

An exploratory analysis of the emergence and implications of Breed Specific Legislation: knee-jerk reaction or warranted response? /

Huitson, Niki Rae. January 2005 (has links)
Thesis (M.A.) - Simon Fraser University, 2005. / Theses (School of Criminology) / Simon Fraser University.
26

Comparison of received prices between replacement heifers and feeder heifers in Alabama

Free, Suzanne Victoria, Kriese-Anderson, Lisa A., January 2008 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2008. / Abstract. Vita. Includes bibliographical references (p. 60-62).
27

Evaluation of two indigenous South African sheep breeds as pelt producers

Campbell, Louisa Jacoba. January 2007 (has links)
Thesis (M.Sc.(Agric.))(Animal Science)--University of Pretoria, 2007. / Summaries in Afrikaans and English. includes bibliographical references. Available on the Internet via the World Wide Web.
28

Estudo tomográfico do encéfalo de cães dolicocefálicos, mesaticefálicos e branquicefálicos clinicamente sadios /

Doiche, Danuta Pulz. January 2011 (has links)
Orientador: Luiz Carlos Vulcano / Banca: Masao Iwasaki / Banca: Rogério Martins Amorim / Resumo: A Tomografia Computadorizada (TC), juntamente com a Ressonância Magnética, são modalidades de diagnóstico por imagem avançadas, consideradas de escolha para a avaliação do sistema nervoso, por fornecerem imagens livres de sobreposições e detectarem pequenas diferenças de densidade tecidual. Dentro de qualquer estudo, o conhecimento das possíveis formas de apresentação de cada estrutura e a determinação do limite entre o fisiológico e o alterado são fundamentais para um estudo preciso. O presente trabalho teve como objetivo a descrição dessas variações nas imagens tomográficas do encéfalo, no que diz respeito aos ventrículos laterais e atenuação do parênquima encefálico e cerebelar entre os grupos aqui estipulados (grupo dolicocefálico composto por cães pastores Alemães, grupo mesaticefálico composto por Rottweilers e grupo braquicefálico compostos por cães da raça Boxer) e assim enriquecer a avaliação cerebral à TC e minimizar erros de interpretação. Foram detectadas diversas diferenças individuais e entre os grupos à avaliação qualitativa. Quantitativamente, houve diferença da altura ventricular entre os braquicefálicos e os demais, mostrando que ainda não é possível apenas uma faixa de valores da altura ventricular comum a todos os cães, e que, para as raças braquicefálicas o valor da razão da altura ventricular e encefálica até 25% pode servir como limite superior nos animais hígidos. Os valores de atenuação finais na fase pré-contraste são compatíveis com trabalhos anteriores, o bulbo olfatório e o cerebelo apresentaram-se diferentes estatisticamente em relação aos demais locais. A única raça que teve nas fases simples e contrastada diferenças estatísticas em todos os locais foram os animais do grupo B / Abstract: Computed tomography (CT) along with Magnetic Ressonance Imaging (MRI) are diagnostic imaging modalities of advanced, considered choice for the evaluation of the nervous system, for providing free images overlap and detect small differences in tissue density. Within any study, knowledge of the possible forms of presentation of each structure and determining the limit between physiological and change are fundamental to a precise study. This study aimed to describe these variations in the tomographic images of the brain, with respect to the lateral ventricles and attenuation of brain parenchyma and cerebellum between the groups set forth herein (dolichocephalic group composed of German shepherd dogs, a group composed of rottweilers and mesaticephalic brachycephalic group consisting of Boxer dogs) and thus enrich the evaluation of brain CT and minimize misunderstandings. We detected several differences between individuals and groups in the qualitative assessment of the aspects mentioned. Quantitatively, there were differences between the ventricular height between brachycephalic and others, showing that it is not possible just a strip of ventricular height values common to all dogs, and that for brachycephalic breeds the value of 25% can serve as upper limit in healthy animals. The final attenuation values in the pre-contrast are consistent with previous works, the olfactory bulb and cerebellum were different statistically when compared to other locations. The only race that was simple and contrasted phases statistical differences in all sites were the animals in group B / Mestre
29

Comparative study on the biological performance of progenies of Western Sanga x Afrikaner and Bonsmara cattle in the sourish mixed bushveld of the North West Province

Moraka, Joseph Ntlhoki January 2000 (has links)
The study compares the biological performance of progenies of the Afrikaner x Western Sanga crossbred (small frame) and the Bonsmara (medium frame) cattle on the following traits: calving and growth rates as well as mortalities. The study was conducted in the Sourish Mixed Bushveld of the North West province. The objective was to identify a lowcare cattle breed, which can withstand unfavourable conditions under which most farmers in the North West Province operate. The results of this study indicated that, under good management, the Bonsmara cattle have higher growth rates compared to the Sanga cattle. There were statistical differences with regards to birth, pre-wean and wean masses, (P< 0.0001). Sanga cattle however were able to maintain higher calving rates under all varying conditions (Bonsmara 77% average and Sanga 84% average). The Sanga, due to its lower nutritional requirements, on average requires 15% less of the surface area required by the Bonsmara. Sanga cattle also returned better yields in terms of kilogram weaned calf per LSU and per hectare. With regard to herd mortalities, there was no significant difference (P = 0.03329).
30

Swine: a study of the seven leading breeds

Livesay, Edward Alexander January 1916 (has links)
Master of Science

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