The impacts of climate change on livestock production are complex problems, existing in the rela-tionship among this sector and others sectors such as environmental, social, economic and political systems. The complexity and dynamic of these impacts cannot be solved simply in isolation with the linear approach. A system thinking methodology is introduced in this paper to understand the impacts of climate change on livestock production, and identify effective interventions strategies to address this systemic problem. System thinking is a way of thinking about the world and relationships which has been developed far along way in the past. Today, systems thinking has become increasingly popular because it provides a \'new way of thinking\' to understand and manage complex problems, whether they rest within a local or global context. While four levels of thinking is a fundamental tool to identify systemic problems, Causal Loop Diagram (CLD) is a visual tool created by a computer program to illustrate the whole picture of climate change impacts. CLD consist of feedbacks for system, which help strategists identify appropriate intervention strategies in solving the systemic problem. / Ảnh hưởng của biến đổi khí hậu đến ngành chăn nuôi là một trong những vấn đề phức tạp, bởi mối quan hệ chặt chẽ có hệ thống của chúng với các lĩnh vực khác như môi trường, xã hội, kinh tế và chính trị. Những tác động phức tạp đa chiều này không thể giải quyết đơn thuần bằng các giải pháp mang tính đơn lẻ. Phương pháp tư duy hệ thống được giới thiệu trong bài này cho phép hiểu đầy đủ, có hệ thống các tác động của biến đổi khí hậu đến ngành chăn nuôi, đồng thời xác định được những giải pháp chiến lược phù hợp để giải quyết vấn đề mang tính hệ thống này. Tư duy hệ thống là cách tư duy và tiếp cận với sự vật, hiện tượng khách quan, và các mối quan hệ của chúng, phương pháp này đã được nghiên cứu và phát triển từ xa xưa. Ngày nay, tư duy hệ thống đang được ứng dụng phổ biến và rộng rãi hơn trong các nghiên cứu phát triển bền vững vì phương pháp này cung cấp một “tư duy mới” để hiểu và quản lý được các vấn đề phức tạp, dù chúng ở qui mô địa phương hay trên phạm vi toàn cầu. Trong đó, bốn cấp bậc của tư duy là công cụ cơ bản để nhận biết các vấn đề phức tạp, và sơ đồ các vòng tròn tác động (CLD) là công cụ trực quan được xây dựng bằng phần mềm máy tính để chỉ ra bức tranh toàn cảnh các tác động của biến đổi khí hậu. Các vòng tròn tác động này phản ánh các diễn biến thực tế và các thông tin giúp cho việc xác định các giải pháp chiến lược.

The production of forage in British Columbia plays and integral role in sustaining livestock herds within the province. Forage is an important component in the daily feed requirements of horses, sheep, and cattle. Fluctuations in the availability of forage due to drought or bad weather conditions can impose considerable costs on farmers who raise livestock. Wide—spread drought conditions can significantly limit the availability of forage crops within certain regions, causing prices within those regions to become inflated. Under standard insurance in British Columbia, farmers are only insured against shortfalls in production; there is no compensation provided against increases in the price of forage. For those purchasing forage, a Wide—Spread Drought (WSD) insurance scheme would provide insurance against the price—risk associated with drastic weather conditions. However, since forage prices are required to operate such a policy and are non—observable, a mechanism is needed in order to estimate them. A regional spatial price—equilibrium model which relates regional prices to regional production is developed in this thesis. The model will eventually be used to predict prices and hence determine whether a particular region is eligible for a payout under the WSD insurance scheme. A key assumption behind the model is that according to the ‘Law of One Price’; prices are perfectly arbitraged. In a competitive setting, in which agents maximize individual welfare, total welfare is maximized and prices between regions will not differ by more than the transportation costs. This spatial price—equilibrium model is applied to British Columbia forage production. The regions incorporated in the study include the Peace River, Central Interior, Cariboo—Chilcotin, Thompson—Okanagan, and Kootenay Regions. The Lower Mainland/Fraser Valley and Vancouver Island are excluded as they do not typically fall under the forage crop insurance plan in British Columbia.

73 pp. / Originally developed in Iowa and adapted for Arizona. Arizona Youth Livestock Quality Assurance Member Manual; Arizona Youth Livestock Quality Assurance Activity Guide. / This trainer's reference is for use in implementing the youth livestock quality assurance program. The curriculum is designed to provide youth and adults with a better understanding of the risks involved in the food production industry, better understand the Good Production Practices (GPP's) that can help them produce a safer product and therefore, implement these GPP's in their own livestock production system.

This dissertation investigates the hypotheses that high transaction costs contribute to relatively low participation rates in livestock leasing in South Africa; and that specific contractual characteristics contribute to minimising total transaction costs of livestock leasing contracts in South African commercial agriculture. Many emerging livestock farming businesses may value the option of leasing-in livestock. Likewise, many established livestock farming businesses are currently undergoing expansion (especially dairy farms) and may also value the option of leasing-in livestock. A reduction in transaction costs and an improvement in efficiency of the livestock lease market could prove beneficial for emerging/expanding livestock farms. Likewise, investors, who anticipate competitive rates of return from investments in livestock, may value the option of owning and leasing-out livestock to suitable farm businesses. Transaction costs in livestock rental contracts include costs of information about contracts, costs of monitoring and enforcing contracts, costs of finding party members to contract with, the costs of risk of an agreement being terminated due to exogenous factors such as land claims, the risk of incomplete contracts and the costs of risk bought about by adverse selection and moral hazard. The magnitude of transaction costs incurred by participants of a livestock leasing contract are a function of how costs and risks are shared between the lessee and lessor, the inclusion of specific contractual clauses, the type of leasing contract, the relationship between party members and additional contractual characteristics. A census postal survey of two populations of livestock farmers, namely members of the Jersey Breeders' Societies of South Africa, was conducted during April and May 2007 to collect data on farmers' perceptions of and their participation in livestock rental contracting agreements. Elicited data was analysed using a multinomial discriminant analysis to identify factors that discriminate between non-participants of the livestock leasing market, lessees of livestock and lessors of livestock. Ordinary least squares regression was used to identify preferred characteristics of livestock lease contracts. Results of the first analysis suggest that a livestock leasing market does exist in South Africa; however, the market is characterised by high transaction costs. Non-participation in livestock leasing markets amongst survey respondents is partially attributable to the high perceived costs of obtaining market information and establishing and enforcing livestock lease agreements. Findings of the second analysis show that survey respondents, on average, showed a preference for formal agreements, leasing commercial animals for shorter periods and keeping detailed inventories. It is concluded that providing livestock farmers with information about important characteristics of successful livestock lease agreements may reduce transaction costs, and thus reduce market inefficiency in the market. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2007.

Grazing lands in Eritrea are degraded due to decades of overstocking and consequent overgrazing. Since the rangelands are accessible to entire village communities, organisation and coordinated decision making regarding the management of these resources is not often achieved. Farmers are not motivated enough to make investments to improve a communally owned resource due to the prevailing common access grazing systems. A field survey was undertaken interviewing 12 farmers in the private access commercial and 80 farmers in the common access subsistence grazing using face to face interviews in the Barka and Arado cattle farming communities in four out of the six regions in Eritrea. Debub, Gash-Barka, S. Keih Bahri and Maekel regions were selected using stratified and simple random sampling methods. The regions were chosen based on various agroecological zones where the representatives of different grass species and the two most common cattle breeds in Eritrea (Arado and Barka) are found. The survey included the collection of data on village and household characteristics focusing on rangeland grazing management systems and additional sources of supplementary forage. The study uses several stages of analysis like principal component analysis accompanied by regression analysis together with descriptive statistics and ordination diagram. The commercial farmers addressed grazing constraints by investing in improved grazing through planting 258 ha per farmer of drought resistant seeds and 1767 vs. 8 cactus slices per farmer and covered 75% vs. 40% of forage requirements from grazing resources compared to the subsistence farmers, respectively, during 2002. These results were achieved because 78% of the commercial farmers adopted controlled stocking rates. In common access grazing, the costs of collective action to control cattle stocking rates are high, making imple mentation of stocking rate controls difficult. As a consequence, 65% of the subsistence farmers were forced to migrate their cattle looking for grazing forage in the dry season during the year. The outcomes of migration were evidenced by the results of severe overgrazing and degradation on the rangelands proximity to villages in Debub and Maekel regions and the populated area of Gash_Barka region. The increased number of animals resulting in high grazing pressure was the consequence of migration. Ten vs. six percent of mortality rates was reported for the subsistence systems compared to the commercial systems respectively. The lower results of milk yield, calving rates and off- take rate productivity indicated in the different stages of analysis for the subsistence farmers were the consequences of the lack of the adoption of controlled stocking rates primarily constrained by the migration. The Barka and Arado cattle farming systems are kept under common access grazing systems. Compared to the Arado cattle farming, the Barka cattle farming region had relatively better access to grazing forage. The better quality of grazing in this region is attributed to a naturally low stock density in the region. During 2002, the Barka cattle farming had 1087 vs. 721 Lit of milk yield, 63% vs. 53% of calving productivity and 9.3% vs. 10.9% of mortality rates than the Arado cattle farming regions respectively, due to access to a wider area of grazing lands and more labour inputs. The Barka cattle area farmers are agro pastoralists and usually focus on grazing dairy cattle farming than crop farming. They increased calving rate productivity and decreased mortality rates by increasing the proportion of lactating cows and decreasing the proportion of oxen compared to the Arado cattle farming. The Arado cattle farming had higher offtake rates and income from cattle sales compared to the Barka cattle farming region. The higher off- take rate, which is an index of percentage of cattle sold, for the Arado cattle was probably linked to the shortage of grazing forage and increased herding costs. The Barka and Arado cattle farmers had a shortage of quality and quantity crop residue winter forage during 2002. Farmers were dependent only on rain fed cropping. The application of crop rotation, fallow and chemical fertilizers were low to enhance soil nutrients. Out of the total crop residues forage produced, only 22% and 15% of legumes residue DM forage was produced for the Barka and Arado cattle farmers respectively. Agro- industrial and crop farming by-products supplementary feeds were also limited due to the shortage of feeds in the country during the year. In general, government intervention is important to bring institutional changes to promote the adoption of controlled stocking rates to alleviate the shortage of grazing forage. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2007.

In rural Punjab of Pakistan, women from small farm families have a huge role to play in realizing the potential that the country has in livestock sector to flourish. The study presents the current socio-economic condition of women livestock raisers, the extent and nature of their participation in livestock management activities, the impact of women's participation on their families' welfare, and the factors affecting their participation in livestock management activities. The type and size of the family, respondent's age, distant location of the village from the city, and the overall developmental status of the district had their impact on different aspects of rural women's status. At each of the three geographical levels, women respondent's participation level in livestock management activities was multiple of that of their husbands' level. Cultural norms, gendered division of labor, availability of family labor, and the physical condition of the participant were found more operative in determining the nature and level of participation of the family labor in livestock management activities. Participation of the family labor, various aspects of women's status, livestock related factors, and economic factors were the main causes identified as the factors affecting women's participation in livestock management activities. Improving women's role in livestock management and production is essential in improving overall family's health, education, income, and food security. The results signify the need for geographical targeting and the importance of using a gendered approach in the agricultural development programs.

A long-term grazing trial was started in 1977 at Armoedsvlakte Research Station, about 10km west of Vryburg, in Tarchonanthus veld of the Ghaap’s Plateau, which is a variation of the Kalahari Thornveld veld type. The main aim of this study was to use the extensive veld condition and animal production data set to investigate the effects and interactions of stocking rate, grazing system applied and seasonal rainfall on veld condition and cattle production. The grazing trial has changed three times since its inception resulting in three different phases. The main changes in veld condition during phase one (1977-1991) was due to density independent effects (e.g. seasonal rainfall) and not density dependent effects (e.g. stocking rate). A major change occurred in 1985 following a multiple year drought. The drought resulted in adverse changes in species composition, basal cover and residual biomass of all treatments. The system did not recover from the drought during phase one, despite well above mean seasonal rainfall for a number of years after the drought. During phase two (1992-1999) and phase three (2000 to present) completely different vegetation dynamics occurred than what was experienced during phase one. Density dependent effects (e.g. stocking rate) were more important in explaining variation in veld condition during these two phases. High stocking rates resulted in adverse changes in species composition, poor basal cover and a low residual biomass production. It is however important to note that seasonal rainfall did explain a significant additional amount of variation in veld condition. This suggests that a continuum of non-equilibrium and equilibrium vegetation dynamics occurred in these two phases. The residual biomass and seasonal rainfall model for phase one indicate completely different results for the gain per animal data. In the seasonal rainfall model, stocking rate does not have a significant effect on gain per animal, but seasonal rainfall and the interaction of stocking rate with seasonal rainfall explains most of the variation in gain per animal. This suggest a continuum of non-equilibrium and equilibrium dynamics and that animal production is more sensitive to seasonal rainfall than to stocking rate, although the significant interaction of stocking rate with seasonal rainfall suggest that the seasonal rainfall effect on animal production is dependant on stocking rate. The residual biomass model however indicates that stocking rate is more important than rainfall in explaining variation in the mass gains per animal. The stocking rate effect on gain per animal was significant and indicated that as stocking rate increased, that gain per animal decreases. Seasonal rainfall and the interaction of stocking rate with seasonal rainfall had no significant effect on gain per animal. The amount of variation explained by the seasonal rainfall model was larger than the residual biomass model and this indicates that rainfall explains more variation in gain per animal, than residual biomass does. This possibly indicates that non-equilibrium effects are stronger than the equilibrium effects, but it is important to notice that stocking rate had a significant effect in some cases. The gain per hectare models (seasonal rainfall and residual biomass) for phase one indicates that stocking rate has a significant effect on gain per hectare. Increasing stocking rates resulted in higher gain per hectare, which suggests that the turning point of the typical “Jones and Sandland model” has not been reached and this might be due to light stocking rates applied during the duration of phase one. The seasonal rainfall model however has significant effects of seasonal rainfall and interactions of stocking rate with seasonal rainfall on gain per hectare. This suggests that the effect of stocking rate is dependent on seasonal rainfall and that seasonal rainfall explain an additional amount of variation in gain per hectare. In general, it appreared that the optimal stocking rate for animal production was higher than those applied during the duration of the trial, but this is due to lower than planned actual stocking rates applied during all three phases of the trial. It is very difficult to determine a generic optimal stocking rate for different rainfall volumes and it is recommended that the actual stocking rate for different ecological zones be determined based on rainfall, biomass, species compos[i]tion, basal cover and available browse and not just on the provisional recommendations. The type of grazing system applied did not show any statistically significant effects on both gain per animal and gain per hectare for the animal production data during phase one. This result is interesting and contradictive to most of the scientific literature where some authors concluded from their studies that rotational grazing systems produce higher animal production than continuous grazing systems, whereas others researchers state that continuous grazing systems produce higher animal production than rotational grazing systems. In phase two both the residual biomass and seasonal rainfall models for phase two did not show any significant effects and interactions of stocking rate, seasonal rainfall level and/or residual biomass on both gain per animal and gain per hectare. Both the residual biomass and seasonal rainfall models for phase three did not show any significant effects and interactions of stocking rate, seasonal rainfall level and/or residual biomass on animal gains per animal. The seasonal rainfall model did not show any any significant effects and interactions of stocking rate, seasonal rainfall level and/or residual biomass on animal gains per hectare. However, the residual biomass model indicated that stocking rate had a significant effect on gain per hectare and the production closely followed the Jones and Sandland (1974) model as at low stocking rates, gain per hectare increases at a rapid rate, but as stocking rates increases to high stocking rates, the rate of increase in gain per hectare declines, until it eventually reaches a turning point, where after gain per hectare declines with increasing stocking rates. Stocking rate only had a significant effect on the condition score of cows during phase two and phase three, as high stocking rates resulted in poor animal condition in both phases. No significant effects and interactions of stocking rate and seasonal rainfall were indicated on calving percentage, weaning percentage, conception rates and percentage of desirable meat produced during phase two. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, [2011].

Die Nutztierhaltung in Nordwestdeutschland befindet sich derzeit in dem empfindlichen Dilemma zwischen den wirtschaftliche Erfordernissen, welche der internationale Strukturwandel in der Nutztierhaltung an die Wettbewerbsfähigkeit stellt, und den derzeitigen Entwicklungspotentialen in der Region. Zum einen begrenzen die natürlichen Potentiale eine weiter ansteigende räumliche Verdichtung der Nutztierhaltung. Des Weiteren hat sich das gesellschaftliche Anforderungspotential an die Landwirtschaft als auch an den ländlichen Raum geändert und forciert keinen weiteren Anstieg der Nutztierhaltung. Die Bedingungen durch die hohe Tierdichte verlangen zunehmend, dass in Nordwestdeutschland eine nachhaltige Ausrichtung der Nutztierhaltung in höherem Maße verankert wird. Die vorliegende Arbeit beschreibt hierfür wesentliche Herausforderungen der Nutztierhaltung in den Bereichen Umweltschutz, der Tiergerechtheit intensiver Haltungssysteme und regionale Ressourcenkonflikte. Umweltschutz: Die Stoffdynamik von Stickstoff (N) und Phosphor (P) sämtlicher Betriebsgüter wurde auf sechs intensiven schweinehaltenden Betrieben über einen Zeitraum von 5 Jahren analysiert. Es wurde deutlich, dass die hohe Leistung und die leistungsbezogene Fütterung sich positiv auf Nährstoffeffizienz in der Tierhaltung auswirken, im Pflanzenbau jedoch Defizite bestehen. Insbesondere die Wahrnehmung der anfallenden Menge tierischer Exkremente als (N, P) Dünger ist unzureichend. Die Düngewirkung des Wirtschaftsdüngers [Unterschätzung N = 7,6 % (10,6 kg/ha), P = 33,6 % (11,6 kg/ha)], aber auch die Anwendung von Mineraldünger [N um 4,1 % (8,1 kg/ha), P um 12,7 % (1,5 kg/ha)] wurden deutlich unterschätzt. Als Folge hatten die Betriebe große Nährstoffverluste (104,5 kg N/ha; 11,7 kg P/ha) zu verzeichnen. Die Studie bewertet die kritischen Aspekte des Nährstoff-Managements und diskutiert mögliche Verbesserungen für die Zukunft. Tiergerechtheit intensiver Haltungssysteme: Auf drei Mastbetrieben intensiver Haltungsformen wurden jeweils sechs Analysen (wöchentlich) mit dem Bewertungssystem nach Welfare Quality® durchgeführt, um aufzuzeigen, inwiefern dieses geeignet ist, die Tiergerechtheit in intensiven Haltungssystemen zu analysieren. Es wird die Durchführbarkeit des Systems bewertet und analysiert, welche Rückschlüsse sich durch die Bewertung auf die Tiergerechtheit intensiver Haltungsformen ziehen lassen. In der Gesamtbewertung (excellent, enhanced, acceptable or not classified) wurden 72,3 % aller Untersuchungen der zweiten Bewertungskategorie "enhanced" zugeordnet, während 27,7 % die dritte Kategorie 7. Zusammenfassung 79 "akzeptabel" erreichten. Die Hauptkritikpunkte waren eine unzureichende Wasserversorgung, vorhandene Schleimbeutelentzündungen durch die Besatzdichte und das Ausleben natürlicher Verhaltensweisen. Die Untersuchung zeigt, dass das Bewertungssystem grundsätzlich geeignet ist, die Tiergerechtheit in intensiven Haltungssystemen zu analysieren, jedoch scheinen nicht alle Messungen (insbesondere im Bereich „Good Housing“ und „Good Health“) empfindlich genug zu sein, um Unterschiede der Tiergerechtheit zwischen intensiven Haltungssystemen in ausreichendem Maße bewerten zu können. Weitere Analysen mit einer größeren Anzahl von Betrieben sind hier nötig. Die Arbeit diskutiert mögliche Ansatzpunkte für die Verbesserung der Tiergerechtheit intensiver Haltungssysteme und greift hierbei auch die derzeitige gesellschaftliche Diskussion auf. Wachsende Konkurrenz um begrenzte regionale Ressourcen: Die Studie stellt dar, welche Anreizmechanismen und Konflikte die Nutztierhalter als regionale Indikatoren für die Zukunftsfähigkeit des Standortes wahrnehmen. Auf Grundlage der theoretischen Erklärungsansätze für Auswirkungen von intensiven Tierhaltungsregionen ist ein Fragebogen konzipiert worden, welcher in Form einer Onlinebefragung bei 137 Landwirten in der gesamten Region Nordwestdeutschlands durchgeführt wurde. Es wird deutlich, dass sich die Nutztierhaltung, mit den regionalen Herausforderungen einer zunehmend verdichteten Tierhaltung deutlicher konfrontiert sieht, als vorteilhafte Produktionsbedingung wahrgenommen werden. Als bedeutende Ressourcenkonflikte sind eine ansteigende Flächenknappheit für die Verwertung des Wirtschaftsdüngers, die Anforderungen durch den Natur- und Landschaftsschutz als auch eine ansteigende Standortproblematik für Bauvorhaben ausschlaggebend. Im Gegensatz zu dieser hohen Wahrnehmung negativer Auswirkungen des Produktionsstandortes in Nordwestdeutschland wird noch erhebliches Potential für weitere Erweiterungsmöglichkeiten der Tierbestände in Nordwestdeutschland gesehen. Zugleich werden der intensiven Tierhaltung in Nordwestdeutschland auch bedeutende vorteilhafte Produktionsbedingungen zugesprochen. Die Nutzeffekte werden vor allem im human- und social-Kapital gesehen werden. Diese Elemente verursachen jedoch ebenso ein geringes geografisches Reaktionsvermögen auf die zunehmenden Problemstellungen und lassen die Raumnutzungskonflikte weiter ansteigen. Durch die Wahrnehmung der Standortauswirkungen trägt die Arbeit dazu bei, die Anforderungen der Nutztierhalter an die Produktionsbedingungen in der Regionalentwicklung stärker zu berücksichtigen und bestehenden Problemstellungen entgegenzuwirken.

No description available.

Perennial ryegrass (PRG, Lolium perenne) is a hardy cool-season grass that is infected with the endophytic fungus Neotyphodium lolii, which enables the plant to be insect repellant and drought resistant, lowering the use of insecticides and fertilizers. However, this fungus produces the compound lolitrem B (LB, m/z 686.4) which causes the tremorgenic neurotoxicity syndrome 'ryegrass staggers' in livestock consuming forage which contains <2000 ppb LB. Ergovaline (EV, m/z 534) is a vasoconstrictor normally associated with tall fescue (Festuca arudinacea), but has also been found in endophyte-infected PRG. Past research has shown a strong linear correlation between levels of LB and EV in PRG. The purpose of this study was to examine the linear relationship between EV and LB in feces and determine common metabolites. To accomplish this, four groups of steers (n=6/group) consumed endophyte- infected PRG over 70 days consumed the following averages of LB and EV: group I 2254ppb LB/633 ppb EV; group II 1554ppb LB/ 373ppb EV, group III 1011ppb LB/259ppb EV, and group IV 246ppb LB/<100ppb EV. Group I in week 4 was inadvertently given a washout period at which time the steers consumed the amount of LB and EV given to group IV (control). Both feed and feces samples were extracted using difference solid phase extraction methods and quantified by HPLC-fluorescence for LB and EV. Concentrations of EV and LB obtained through HPLC-fluorescence in both PRG and feces showed a linear relationship. Additional screening for metabolites was conducted LC-MS/MS and showed possible oxidation and reduction metabolites for both toxins. / Graduation date: 2013