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Dissertation
Einfluss der Mensch-Tier-Beziehung auf die Eutergesundheit von Milchkühen
(2011-03-03)
In der vorliegenden Arbeit wurde der Einfluss der Mensch-Tier-Beziehung sowie verschiedener Managementmaßnahmen auf die Eutergesundheit der Milchviehherden von 46 Schweizer Betrieben, die am Bestandsbetreuungsprogramm mit Schwerpunkt Eutergesundheit „pro-Q“ teilnahmen, untersucht. Für die Charakterisierung der Mensch-Tier-Beziehung wurden Melkereinstellungen mittels Fragebögen, Melker- und Kuhverhalten beim Melken und die Ausweichdistanz der Kühe im Laufstall erfasst. Die Darstellung der Eutergesundheit erfolgte ...
Dissertation
Heat stress response for physiological traits in dairy and dual purpose cattle populations on phenotypic and genetic scales
(2016-02-23)
The main objective of this thesis was to determine the potential impact of heat stress (HS) on physiological traits of lactating cows and semen quality of bulls kept in a temperate climate. The thesis is comprised of three studies. An innovative statistical modeling aspect common to all three studies was the application of random regression methodology (RRM) to study the phenotypic and genetic trajectory of traits in dependency of a continuous temperature humidity index (THI).
In the first study, semen quality and ...
Dissertation
Entwicklung eines ökonomisch ausgerichteten Zuchtprogramms für die bedrohte Schweinerasse „Bunte Bentheimer“
(2016-03-03)
Das Ziel dieser Arbeit war, ein ökonomisch ausgerichtetes Zuchtprogramm für die bedrohte Schweinerasse „Bunte Bentheimer“ (BB) zu entwickeln. Ein wesentlicher Bestandteil von Zuchtprogrammen für bedrohte Rassen ist der Erhalt der genetischen Diversität durch Vermeidung von weiterer Inzucht und Reduzierung des Inzuchtzuwachses. In Kapitel 2 wurde die Population der BB unter Berücksichtigung der vorhandenen Abstammungsinformationen in Bezug auf genetische Diversität, Inzucht und Verwandtschaft analysiert. Durchschnittlicher ...
Dissertation
Untersuchungen zum Gesundheitsstatus und zu betrieblichen Maßnahmen der Gesundheitsvorsorge in der ökologischen Schweinehaltung
(2008-01-30)
Im Rahmen dieser Arbeit wurde mittels einer umfassenden und von einer Projektgruppe begleiteten Literaturanalyse sowie anhand von Praxiserhebungen der Frage nachgegangen, wie es um die Tiergesundheit in der ökologischen Schweinehaltung bestellt ist. Ferner wurde untersucht, ob die ökologischen Rahmenrichtlinien (EWG-VO 2092/91) ein Hemmnis für die Sicherstellung eines hohen Gesundheitsstatus der Nutztiere darstellen.
Die Literaturauswertung ergab, dass die Erkrankungsraten sowohl auf ökologisch wie auf konventionell ...
Dissertation
The role of ligneous vegetation for livestock nutrition in the sub-Sahelian and Sudanian zones of West Africa: Potential effects of climate change
(2012-12-07)
Climate change and variability in sub-Saharan West Africa is expected to have negative consequences for crop and livestock farming due to the strong dependence of these sectors on rainfall and natural resources, and the low adaptive capacity of crops farmers, agro-pastoralist and pastoralists in the region. The objective of this PhD research was to investigate the anticipated impacts of expected future climate change and variability on nutrition and grazing management of livestock in the prevailing extensive agro-pastoral ...
Dissertation
Status and Potential of Smallholder Livestock Production Systems in Xishuangbanna, southern P.R. China
(2013-01-23)
With Chinas rapid economic development during the last decades, the national demand for livestock products has quadrupled within the last 20 years. Most of that increase in demand has been answered by subsidized industrialized production systems, while million of smallholders, which still provide the larger share of livestock products in the country, have been neglected. Fostering those systems would help China to lower its strong urban migration streams, enhance the livelihood of poorer rural population and provide ...
Dissertation
Effects of mild water restriction on digestion and nitrogen metabolism in a desert adapted goat breed
(2017-04-26)
Water is the main challenge facing animal husbandry in arid and semi-arid regions of the globe. These areas are characterized by a long dry season lasting between 6 and 8 months. At certain times during the long dry period, water can be so scarce that animals may face severe water shortages. Many studies have been conducted to highlight how ruminants cope during these times of severe water deprivation. Yet, livestock are much more often exposed to mild water shortages for several months in a year. Only a few studies ...
Dissertation
Prevalence of intestinal parasites in small ruminants and their senstivity to treatments with ethnobotanical remedies in Cholistan, Pakistan
(2013-10-16)
Livestock production contributes substantially to the livelihoods of poor rural farmers in Pakistan; strengthening pastoral communities plays an imperative role in the country’s thrive for poverty alleviation. Intestinal helminths constitute a major threat for pastoral livestock keepers in the whole country because chronic infestation leads to distinct losses in livestock productivity, particularly the growth of young animals. Synthetic anthelmintics have long been considered the only effective way of controlling ...
Dissertation
Effects of Different Feeding Regimes on the Digestibility and Faecal Excretion of Nitrogen, Soluble Carbohydrates and Fibre Fractions in Water Buffaloes kept under Subtropical Conditions
(2010-11-12)
In the course of the ‘Livestock Revolution’, extension and intensification of, among others, ruminant livestock production systems are current phenomena, with all their positive and negative side effects. Manure, one of the inevitable secondary products of livestock rearing, is a valuable source of plant nutrients and its skillful recycling to the soil-plant interface is essential for soil fertility, nutrient - and especially phosphorus - uses efficiency and the preservation or re-establishment of environmentally ...
Dissertation
Horizontal nutrient fluxes and production efficiencies in urban and peri-urban crop and livestock husbandry of Niamey, Niger
(2009-11-17)
Urban and peri-urban agriculture (UPA) increasingly supplies food and non-food values to the rapidly growing West African cities. However, little is known about the resource use efficiencies in West African small-scale UPA crop and livestock production systems, and about the benefits that urban producers and retailers obtain from the cultivation and sale of UPA products. To contribute to filling this gap of knowledge, the studies comprising this doctoral thesis determined nutrient use efficiencies in representative ...