Browsing by Subject "Performance"

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Comparison of effects of Echinacea purpurea juices and Nigella sativa seeds on performance, some blood parameters, carcass and meat quality of broilers
(2009) Nasir, Zahid; Grashorn, Michael
Use of phytogenic substances in animal production is increasing due to their beneficial effects on feed digestion, promotion of production performance and improving product quality. They contain a number of pharmacologically active substances which have shown their activities in different body systems and, therefore, they are considered as one viable alternative to in-feed antibiotics. Presence of a variety of active ingredients indicates that phytogenic substances may have affects on different metabolic pathways, activity of different enzyme systems, immunity and performance parameters. Especially, improvement of immunity may help birds to cope in a better way with stress situations during fattening and by this may enhance well-being as well as quality of products of animal origin. Echinacea purpurea (EP) and Nigella sativa (NS) belong to the group of phytogenic substances that have been reported to stimulate immune system in laboratory trials as well as in human studies. Positive effects of EP and NS have been observed in a number of in vitro and in vivo experiments, which show that their application in poultry can be beneficial for maintaining health, improving immunity and performance parameters. However, no study was conducted to evaluate the comparative as well as synergistic effects of EP juices and NS seeds on broiler health, performance and activities of different enzymes related to heart and liver functions. The objectives of this thesis were set to investigate the effects of EP juices and grounded NS seeds on performance, metabolism (serum protein, blood picture and some liver and heart associated enzymes in blood), carcass and meat quality in broilers (Ross 308). For this purpose five preliminary trials were performed to investigate the effects on bird?s metabolism. Fattening trial was carried out to study the comparative and synergistic effects of EP juice and NS seeds on performance, carcass and meat quality. Three preliminary experiments were performed using two different preparations of EP juices; EP-F (EP fermented juice) and EP-A (EP juice on alcohol basis). Initially, effects of EP-F and EP-A were compared along with testing different dose levels. EP juices were orally supplemented intermittently for a 3 days (1-3, 13-15 and 25-27), followed by 9 days without EP application. Comparing the effects of EP-F and EP-A, better performance and improved health was observed by application of EP-F juices. Application of 0.25 ml/kg BW0.75 EP-F juice has shown more positive effects as compared to other treatment levels. EP-F treated birds showed significantly better average daily weight gain and significant improvement of serum globulins, indicating beneficial treatment effect on broiler performance as well as immunity. Levels of serum CK were significantly reduced in EP-F treated birds as compared to control, which shows that EP-F posses the potential to reduce incidence of mortality related to dysfunction of the cardio-vascular system in broilers. Two preliminary experiments were performed using grounded NS seeds. In first experiment different levels (0, 0.5, 1.0, 1.5, 2.0, and 2.5 %) of NS seeds were supplemented in basal broiler diets. 1 % NS was found to be most suitable, which was used in second experiment against a negative control. Numerically better FCR during starter phase was obtained by application of 1 % NS seeds, but these effects were decreased during grower phase. Less number of mortalities was observed in NS treated birds as compared to control. In the fattening trial, four treatment combinations were tested as: control (without any feed or water additive), E (drinking water intermittently supplemented with EP-F), N (feed supplemented with NS seeds) and EN (drinking water intermittently supplemented with EP-F and feed supplemented with NS). The results showed that application of EP-F as well as NS has no negative effect on broiler performance, carcass and meat quality. Birds performed to their maximum potential and supplementation of EP-F and NS helped birds to perform better. Combined application of EP and NS resulted in reduced mortality and numerical improvement in weight gain and feed consumption, significantly (P<0.05) higher meat CP as compared to E and N treatments. In general, a synergistic positive effect of simultaneous application of EP and NS was observed on performance, carcass and meat quality in broilers. Based on these results, it can be concluded that intermittent application of EP-F and continuous application of NS seeds has no negative effect on broiler performance, carcass and meat quality. Beneficial effects of Echinacea supplementation on broiler performance, health and immunity can be obtained by intermittent application of EP-F through drinking water. Combined application of EP-F and NS seeds has shown a trend of improved broiler performance and meat quality, which indicate synergistic effects of active ingredients of both phytogenic compounds.
Environmental enrichment in intensive production systems for farm animals
(2010) Jordan, Dušanka; Bessei, Werner
Barren and space restricted environment of intensive production systems thwarts the expression of numerous behavioural patterns due to inadequate stimulation. Consequently, animals may develop various abnormal and damaging behaviours or may be in general less active, which contributes to the expression of leg disorders, especially in fast growing animals. These problems may be alleviated with appropriate environmental enrichment, therefore the objective of the thesis was to elucidate the appropriateness of selected environmental enrichments in fattening pigs, growing rabbits, laying hens and fast growing broilers. For this purpose, four studies were conducted. In the first study we wanted to examine the effect of small amount of straw or hay (100 g per animal per day) laid daily in a rack on the behaviour, growth rate and carcass composition of fattening pigs of both sexes (castrated males, females) housed in slatted floor pens. In the second study we studied the influence of gnawing sticks made of Norway spruce (Picea abies) on the behaviour of male growing rabbits (Slovenian sire line SIKA for meat production) housed individually in wire-mesh cages. The third study included laying hens with enhanced diet complexity ? instead of only one, hens were fed two diets in sequence. We studied the effect of sequential feeding with wheat on the behaviour, feed intake, feather condition and egg production of non beak-trimmed ISA Brown laying hens housed in standard cages (five birds/cage). The birds were allotted to one of four treatments. The control (C) was fed a conventional complete diet. Three treatments were fed sequentially with whole wheat (SWW), ground wheat (SGW) or ground wheat with a vitamin premix, phosphorus and oil (SGWI). In sequential treatments, 50% of the ration was fed as wheat from 9:00 to 16:00 o?clock and the remaining 50% as a protein-mineral concentrate (balancer diet) from 16:00 to 9:00 o?clock. In the fourth study we examined the effect of environmental enrichment on foraging behaviour, locomotor activity, growth and feed conversion of fast growing broilers (Ross 308). Animals were allotted to three treatments. The control birds (C) were fed with pellets in a trough, the W birds received additionally to pellets in a trough a small quantity of whole wheat scattered twice a day in the litter. In the P treatment the trough was removed at 14 days of age and feed pellets were scattered in the litter five times a day. Environmental enrichment of fattening pigs with small amount of hay or straw increased the proportion of time animals were active on account of increased occupation with substrate. However, increased proportion of total activity was noticed only in females, which also spent more time chewing substrate than castrated males. Both substrates significantly reduced time spent biting pen bars and the frequency of aggressive encounters. Neither hay nor straw negatively influenced pigs? growth rate and lean meat percentage, whereas sex of the animals significantly influenced both traits. Females grew slower and had greater lean meat percentage than castrated males. In contrast to fattening pigs, environmental enrichment had almost no influence on the behaviour of growing rabbits. Gnawing sticks made of Norway spruce did not attract much of rabbits? interest and significantly influenced only the duration of feeding by 2.08 ± 0.87%. In laying hens, SWW birds spent less time feeding and stood still longer compared to birds in other treatments when fed wheat based diet. This influenced the occurrence of feather pecking, because four hours after distribution of wheat diets, feather pecking was the highest in the SWW and the lowest in the SGW treatment. Consequently, the poorest feather condition was recorded in the SWW treatment. Total feed intake was the highest in the C treatment, while birds ate greater amount of balancer diet compared to wheat based diets. In fast growing broilers, the environmental enrichment with scattered whole wheat (W) did not influence any of the observed behaviour. However, scattering feed pellets in the litter (P) significantly decreased time spent lying in the third and fourth week of age. From the third week onwards, P birds also spent more time walking, scratching and pecking compared to the C and W birds. In feed intake, feed conversion and growth rate there was no difference between the C and W treatment, whereas birds in the P treatment grew significantly slower, which resulted in 13% lower slaughter weight. To conclude, small amount of hay and straw proved to be an appropriate and inexpensive environmental enrichment for fattening pigs in intensive housing systems, which improved their welfare. The addition of wooden sticks for gnawing demonstrated to be an unsuitable environmental enrichment for growing rabbits. Sequential feeding with wheat had a detrimental effect on laying hens? behaviour and feather condition when used with whole wheat. Therefore, wheat should be used either grounded or perhaps presented in shorter time periods. In fast growing broilers, scattering feed pellets in the litter proved to be a promising method to enhance broilers? activity and thus to improve their welfare. However, further research is needed to be able to avoid reduction in body weight at slaughter age.
From passion to performance : entrepreneurial passion in the creative industries
(2022) Schulte-Holthaus, Stefan; Kuckertz, Andreas
Entrepreneurship drives progress, innovation, growth, and prosperity. Passion, in turn, motivates and energizes people to pursue meaningful activities on a sustained basis. In following their passion and in interacting with their proximal environments, people build up competencies, knowledge, experience, and social relations, which may result in peak performance. When passion develops and relates to the creation, discovery and exploitation of entrepreneurial opportunities, entrepreneurial passion emerges. The current state of research shows that entrepreneurial passion is a source of motivation, inspiration, creativity, and perseverance. In the cultural and creative industries, entrepreneurship often begins from a passion for an artistic or creative work that is pursued as a hobby or leisure activity, which professionalizes over time. Thereby, passion for a creative or artistic activity can also create tensions between ideational and economic-organizational imperatives in entrepreneurial contexts. However, how, and why an artistic or creative passion develops into an entrepreneurial one and how it affects entrepreneurial success is unchartered territory. Hence, the aim of this dissertation is to investigate and explain the development of passion and its effect on entrepreneurial performance of creative people whose venturing ambitions are primarily driven by a non-entrepreneurial passion. The first study identifies the current state of literature on entrepreneurship in the cultural and creative industries. The review elaborates the phenomenon of a non-entrepreneurial passion as central feature of creative industries entrepreneurship and outlines its potential for future research. The second study presents a review of the state of research on passion in the entrepreneurial context and develops a theory-based approach that explains how passion emerges, and how it can extend to entrepreneurship and lead to entrepreneurial performance. Based on 11 semi-structured interviews with successful entrepreneurs whose life paths are characterized by passion for music, the third study follows this assumption and generates mental maps using the Conceptual Causal Mapping method. The results explain the development of real-life passion over time, its current constitution and embeddedness within the personal, social, and entrepreneurial life context and the relation of passion to performance. Based on the person-environment fit theory, the final study develops a model that substantiates the positive effects of life context fit on entrepreneurial passion and performance. Life context fit is operationalized using personal project analysis and the hypotheses were tested on a sample of 406 creative entrepreneurs using partial least squares structural equation modeling. The results demonstrate the effect of life context fit on entrepreneurial passion and its successive translation into performance in four subsegments that can be classified as artepreneurs, culturepreneurs, creative entrepreneurs, and lifestyle entrepreneurs. However, contrary to expectations, the analyses also indicate that neither the life context fit, nor the domains of entrepreneurial passion have uniform positive outcomes. Rather, these relations occur with compounded positive and negative effects. These results are surprising as the extant literature has found nearly consistent positive outcomes of passion on performance. Post-hoc analyses reveal the varying constitutions of life contexts and the existence of previously unmeasurable domains of entrepreneurial passion for products, for people, and for a social cause among creative practitioners and help explaining the positive and negative combination effects in the segments. Overall, this dissertation contributes to the cultural and creative industries literature, the state of research on passion in entrepreneurship and psychology, and the literature whose epistemological interest aim at capturing and explaining entrepreneurial contexts and environments. Findings reveal (a) the central importance, development, and impact of passion among creative and cultural entrepreneurs, (b) the influence of life context on passion and performance, and (c) the interplay of combined positive and adverse effects of the domains of entrepreneurial passion and their impact on entrepreneurial performance.
Nutritional evaluation of oilseed press cakes in fish nutrition with emphasis on rainbow trout (Oncorhynchus mykiss, W.)
(2019) Greiling, Alexander Michael; Rodehutscord, Markus
Fishmeal is a valuable, protein rich ingredient for fish feed. It is a source of highly digestible crude protein (CP) with a balanced amino acid (AA) profile, well digestible inorganic phosphorus (P), and a highly digestible energy content. However, its availability is decreasing owing to an increasing demand that is driven by the increased production of fish in feed-based production systems. Research has made great advances in counteracting the limited supply of fishmeal. As a result, the majority of dietary CP in fish feed is made available from oilseeds and their processed by-products. Despite the pre-existing research efforts, the continuous evaluation of feed ingredients in search for alternatives to fishmeal is key to facilitate a sustainable growth of feed-based fish production. Oilseed press cake represents a widely available source of CP. While numerous studies have evaluated the nutritional value of press cake in fish feed, the majority focused on species reared in warmwater production systems. Thus, the objective of this thesis was to add to pre-existing knowledge on press cake and its potential to replace fishmeal in fish feed, with special emphasis on rainbow trout (Oncorhynchus mykiss W.). Initially the nutrient digestibility of various press cakes (linseed, pumpkin seed, rapeseed, soybean, sunflower seed, and walnut kernel cake) was determined in rainbow trout. The press cakes differed greatly in their digestibility of crude nutrients, with CP digestibility ranging from as low as 25% (sunflower seed cake) up to 88% (pumpkin seed cake). Another digestibility experiment was conducted using rapeseed cake and sunflower seed cake whose fibre fractions were reduced using two different processing methods (sieving and dehulling of seeds prior to pressing). The fibre-reduced press cake of rapeseed and sunflower seed cake had a substantially higher CP digestibility than their unprocessed counterpart (Manuscript 1). Three growth experiments were conducted to study the effect of partial replacement of fishmeal with press cake on performance traits of rainbow trout. In all growth experiments groups of rainbow trout were fed with either a basal diet or diets in which fishmeal CP was in part replaced by press cake based on its CP digestibility that was determined in the preceding digestibility experiments. It was found that the performance traits were influenced to a different extent in dependence of the press cake and their inclusion level. Pumpkin seed cake has been shown to have the highest potential to replace substantial amounts of fishmeal of the basal diet without significantly reducing performance traits of rainbow trout. To investigate the potential utilisation of InsP-P and the formation of inositol phosphate isomers in fish two experiments were conducted. The single and interactive effects of a mineral P supplement (monoammonium phosphate; MAP; 1 g P/kg DM of diet) and an InsP6 hydrolysing enzyme (Aspergillus oryzae 6-phytase; 2800 FTU/kg DM diet) were compared between rainbow trout and Atlantic salmon (Salmo salar). For each species a digestibility experiment was conducted under common rearing conditions of each species but using the same four diets (basal diet, basal diet + MAP, basal diet + phytase, and basal diet + MAP + phytase). The faecal disappearance of InsP6 was generally low (approximately 8%) but similar between the species when the diets were devoid of either supplement. The supplementation of phytase significantly increased InsP6 disappearance in both species, but the effect was found to be more pronounced in rainbow trout. The analysis of lower inositol phosphate isomers revealed that their hydrolysis progressed to a greater extent in rainbow trout and it suggested that InsP6 is subject to a different degradation pathway in the two species. While no significant interactive effects on InsP6 disappearance were found between the two supplements for either species, the MAP supplementation slightly decreased InsP6 disappearance in Atlantic salmon but not in rainbow trout. The experiments provide an insight into the breakdown of InsP6 and the faecal appearance of specific lower inositol phosphates and suggest that the use of press cake in feed for rainbow trout seems to be more beneficial than in feed for Atlantic salmon with regards to a more sustainable use of P resources. However, more experiments are recommended to complement these initial findings to gain a better understanding of InsP6 hydrolysis in fish.
Performance and governance challenges of a government-funded microcredit program for the handloom weavers in Bangladesh
(2019) Parvin, Mst. Tania; Birner, Regina
Microfinance is an important policy tool for poverty reduction and employment generation in developing countries. The first microfinance institution was developed in Bangladesh in the 1970s. Since its inception, many studies have been conducted on different aspects of microfinance, such as outreach, impact and sustainability. However, these studies have mostly been limited to the performance of microcredit programs operated by non-government organizations (NGOs). Therefore, it is justified to shift the focus from NGOs to microcredit programs operated by the public sector. To fill this knowledge gap, a case study of Bangladesh Handloom Board (BHB)’s microcredit scheme has been conducted, which represents a publicly sponsored credit program targeting handloom weavers. Using a mixed methods approach, this thesis has analyzed three dimensions of the selected credit program: impact assessment, repayment performance, and governance challenges. These three topics are covered by three different papers in the thesis. The first two papers apply quantitative techniques whereas the third one adopts a qualitative approach for assessing the institutional viability. The objective of the first paper is to estimate the impact of BHB’s microcredit scheme on the handloom weaver’s investment behavior in Bangladesh. From a policy perspective, this analysis is relevant for two reasons. First, it fills the gaps in the impact assessment studies of credit which have largely neglected the government-run microcredit programs. Second, the article provides insights for the promotion and continuation of this public credit program. Using an Instrumental Variable (IV) Two-stage Least Squares (2SLS) regression model, the study findings reveal that the government credit program alone is not sufficient to increase the investment in the handloom sector of Bangladesh. The credit received from sources other than BHB was thought to be more relevant with regard to this goal. However, this result also implies that access to multiple sources of credit put borrowers into a debt trap, which makes them economically worse off after repaying loans with interest. As a result, productive investment does not take place through the credit program. This finding, however, does not imply that the credit program should be stopped. It is concluded that the credit amount available under this program for technology adoption in the handloom sector should be increased. Moreover, providing credit for power looms will facilitate a structural change from using handlooms to power looms, which may provide a more sustainable means of future livelihood for current handloom weavers. The second paper analyses the credit repayment of the BHB’s microcredit scheme. Considering that the repayment rate (which is regarded as one of the success factors of the credit program) was only 65% as of June 2015, this study identifies factors that contribute to such low repayment rate, which makes government-sponsored microcredit programs financially unsustainable. This analysis is important to guide the public credit institutions to design a better lending policy by focusing on the factors that require special attention while lending to the eligible borrowers. Using a Probit model, this study reveals that socioeconomic and community-level factors associated with the borrowers played an essential role in determining timely loan repayment. Some of these factors were beyond the control of the credit institution. In conclusion, this study suggests strengthening the loan monitoring system by opening up more branches so that the timely delivery of financial as well as non-financial services to borrowers can be assured. The third paper examines the governance challenges faced by the BHB. The analysis is based on the findings of the previous two papers. As the findings from both papers highlight the challenges of BHB, it is important to understand why such challenges occur when implementing a government-sponsored credit program and from where they exactly originate. This analysis also has implications for policy revision and reformulation of BHB, which should be guided by a better understanding of the organization-specific problems that a government-funded microcredit program is facing. These challenges are assessed by using a qualitative research method called Process Net-map. The use of this method helps to understand how the credit program is implemented in practice, which may deviate from the prescribed implementation plan. Moreover, this study analyzes the challenges that arise from the perspectives of both the supply-side and the demand-side stakeholders of BHB. The major finding of the first paper is supported by the outcome of this paper as it reveals that shortage of funds was the main obstacle for implementing BHB’s microcredit scheme, which failed to meet the clients’ financial needs. Besides this problem, the shortage of adequate staff was responsible for weak field administration, which is amplified by the lack of incentives to motivate them. Political influence and corruption in the system were also identified as central challenges. From the beneficiary-side, high opportunity cost to get loans, lack of non-financial services, inadequacy of funds, and difficulty in group formation were also major problems. A lack of transparency in information flow between groups was also noted as a problem. This paper concludes that a poorly designed program which fails to address the organization-specific challenges of government-run microcredit program will not improve the livelihood of the intended beneficiaries. Hence, the study recognizes the credit program’s need for a better legal and regulatory framework to address the governance challenges that are identified. The focus should be placed on flexible, demand-driven, bottom-up and participatory initiatives. Overall, the study concludes that government-run microcredit programs, affected by problems from large bureaucracies, face specific challenges, which tend to be larger than those faced by NGO-run microcredit programs. One possible solution may be an enhanced collaborative system that involves both public and private credit institutions as it may encourage cross-sector learning.
Prices, governance challenges and contracts in scaling of biofortification
(2023) Richard, Alioma; Zeller, Manfred
Micronutrient deficiency remains a global health challenge, especially in developing countries, despite government and development partners programs, numerous policies, and interventions to decrease its prevalence. Micronutrient deficiency adversely affects pregnancy, child growth, disease susceptibility, and cognitive development. Populations suffer from deficiencies due to low intake of micronutrients such as iron, zinc, vitamin A and iodine in their diets. Therefore, many interventions and policies have aimed at increasing the intake of micronutrients by the target populations. Some of these interventions include fortification, that is to increase the micronutrient content of foods or condiments, biofortification which entails breeding staple crops with higher content of bioavailable micronutrients, supplementation, and dietary diversity. These interventions face numerous challenges to scale to larger populations mainly because of behavioural attributes, prices, and governance challenges. The importance of prices stretches from academia to policymakers because of its substantial impact on the consumption behaviour of poor households affecting micronutrient intake. Existing literature on prices concentrated on the cost of micronutrient-dense foods compared to starchy staple foods and the price change for different food items. The second challenge in the scaling of interventions is governance challenges. Governance challenges exist in formal and informal institutions affecting the value chain for biofortified seeds or foods. These challenges jeopardize positive development outcomes and may as well pose significant obstacles to scaling the use of biofortified seed and food. Lastly, there has been a growing focus on the involvement of aggregators, processors, and retailers in the development of food value chains in low-income countries, yet the role of supply contracts is unknown. The objectives of this thesis are threefold: 1) to estimate the long-term trends in prices and volatility of micronutrient-dense food as opposed to starchy staple food and derive hypotheses for factors that might have contributed to the observed divergence in the past long-term growth of prices of micronutrient-dense versus starchy food 2) to identify the governance challenges facing farmers, seed multipliers, aggregators, processors, and retailers as one of the scaling pathways and empirically test one pathway to address the governance challenge in Uganda and 3) to determine the distribution and performance of aggregators, retailers, and processors in Nigerias vitamin A food value chain. This cumulative thesis has three papers. The first paper seeks to answer as main question: “Do prices of micronutrient-dense food commodities grow faster than prices of starchy staple food items”. The second paper poses the following as its main question: “What are the governance challenges in scaling biofortified crops”. The third paper addresses the question of which factors determine the distribution and performance of aggregators, processors, and retailers in the development of value chains for staple food crops. In the first paper, we used the autoregressive and panel autoregressive distributed lag models to analyze the trends in relative prices and the effects of income growth. The data set was price data for micronutrient and calorie-dense foods from FAO STAT-GIEWS, IMF, and the World Bank. The results showed that micronutrient-dense food prices in real terms grew on average by 0.03% per month more than starchy staple food prices, with the expectation of a 12% growth gap in the next 30 years. The volatility of micronutrient-dense food items exceeds starchy staple foods in most domestic markets. Also, the prices of micronutrient-dense foods were more volatile in international markets than in most developing countries. Income growth in developing countries is hypothesized to be one of the factors that contributed to the faster growth in demand for and, therefore, prices of micronutrient-dense food commodities. Other factors, such as the growth in the production of staple foods may have caused price trends to persist. After having presented evidence that prices of micronutrient-dense foods have grown faster in the past 30 years, and if this trend continues, interventions for scaling biofortification, among others, will gain importance for eradicating hidden hunger. In the second paper, we provide insights into the governance challenges of biofortification in Uganda. This paper aims to identify the governance challenges facing farmers, seed multipliers, aggregators, processors, and retailers as one of the scaling pathways and empirically test one pathway to address the governance challenge. This pathway was information provision through training. We used a Process Net-Map to elicit information from respondents regarding processes, actors, and challenges in the food value chain of biofortified crops. The Process Net-Map involves the identification of actors, their roles, their influence on the scaling of biofortification and challenges in the processes. The field lab experiment was used to collect data on the effect of information provision on the identification of iron beans. We analysed the data from field lab experiments through a correlated random effects model. The results demonstrate that vine multipliers face challenges in the supply of vines, and households face a trade-off between allocating land for orange-fleshed potatoes and other varieties. In addition, the value chain actors adulterate iron beans while consumers are unwilling to pay a premium for orange-fleshed sweet potato roots and iron bean grains. These challenges may result from information asymmetry, merit goods, collective action, and free riding. Though information provision can improve the identification of iron beans, its effect was insignificant as from the field lab experiments. Increasing access to biofortified seed through subsidies would increase the production of biofortified crops that would saturate the markets. Creating awareness of the importance of nutritious products would enable consumers to pay for biofortified seeds and food. The third paper provides evidence on factors determining the distribution and performance of aggregators, retailers, and processors in Nigerias vitamin A food value chain. We used data collected by HarvestPlus to assess the outcome indicators, including throughput, sales, prices, variable costs and contracts for vitamin A cassava and maize. We used the spatial distributed lag model to determine factors that affect the distribution of aggregators, retailers and processors and the correlated random effects model to assess the role of contracts on their performance. We find that infrastructural and supply variables do not influence the location of aggregators, retailers, and processors. Out of the demand variables (population density, ownership of livestock and literacy rates, price of Garri-cassava flour), only the price of Garri and livestock ownership influenced the location of aggregators, retailers, and processors. Contracts seem to reduce the cost per kilogram for aggregators while insufficiently affecting the costs of retailers and processors. Contracts are also associated with improving the profits of retailers and aggregators. The main policy recommendations emanating from the findings of this thesis are: 1) governments need to adopt policies that enhance nutrition-sensitive interventions such as supplementation, fortification, dietary diversity, and biofortification 2) employ subsidies to increase the production of biofortified crops while creating awareness on the importance of nutritious products in the scaling of biofortified crops and 3) create enabling environments so that aggregators, retailers and processors can engage in contracts with farmers.
Rentabilität und Risiko typischer Ackerbaubetriebe in der Russischen Föderation
(2009) Breunig, Peter; Zeddies, Jürgen
Consistent world population growth, changing diets in emerging markets and the growing impact of biofuels led to considerable price increases for agricultural commodities since 2006, in particular for grains and oilseeds. Among other things this results in a growing interest of capital investors in investments in agricultural companies. Capital investments from outside the agricultural sector play ? especially in Russia ? a major role, due to the farm structure and the predominantly capital-oriented farm businesses. Until now, it is not yet clear, how these investments perform in comparison to the capital market regarding risk and return, which is critical for the future volume and sustainability of these investments. Therefore, the aim of this work is to analyze risk and return of typical arable farms in selected regions of the Russian Federation from 2000 to 2007 and make forecasts from 2008 to 2015. Additionally, the risk-return-performance of the analyzed farms is compared to a russian stock market index. This allows for the examination of the relative excellence based on risk and return among the typical farms and in comparison to the russian capital market. The evaluation of investments in arable farms in the Russian Federation based on risk and return analysis is done by two methods. The first method calculates performance ratios that are based on risk and return values of each typical farm. This is done by analyzing and forecasting financial models of the typical farms, which are based on farm surveys in the relevant regions. In total, eight typical farms in four regions (Voronesh, Stavropol, Samara and Omsk) of the Russian Federation are modeled. For the analysis of historic risk and return values, historic price and yield data from official statistics are integrated into the farm models and the relevant performance ratios are thus calculated. Future performance, price and yield data and their volatility is forecasted by using mathematical methods and published forecasts. The performance ratios of each typical farm are subsequently compared to the russian stock market index MICEX. The second method to evaluate investments in arable farms in the Russian Federation is based on the "Capital Asset Pricing Model". With this model, the return that agricultural companies in Russia have to achieve to have the same risk-return-performance as the Russian stock market can be calculated. This is done by analyzing the movement of applicable stocks relative to the total Russian stock market. Additionally investments in arable land are analyzed in the context of investments in arable farms. The results of the thesis show that in the historical period (2000 to 2007) only the typical farms in the Stavropol region are able to exceed the performance of the Russian stock market index. In the forecast period (2008 to 2015) one typical farm in the Voronesh region as well as the typical farms in the Stavropol region are expected to outperform the russian stock market. Furthermore, it can be shown that the arable farms in Samara and Omsk have a considerably lower risk-return-performance compared to the other typical farms in the west and southwest of Russia. The results validate the strong increase in investments in arable farms in the west and southwest of Russia in recent years. Moreover it is assumed that in the Samara and Omsk region similar investment volumes like in the western regions of Russia cannot be expected.
Saponin fractions from fenugreek (Trigonella foenum-graecum L.)as dietary supplements for Nile tilapia (Oreochromis niloticus L.)and common carp (Cyprinus carpio L.)
(2012) Stadtlander, Timo; Focken, Ulfert
The future role and importance of aquaculture for the world food supply is more and more recognized by the public. High quality feed for semi-intensive and intensive aquaculture operations are necessary to guarantee a future continuous growth of fish production. Nutrient utilization efficiency has in the past been augmented by addition of feed additives, mainly anti-biotics and hormones. That practice is prohibited in the European Union since 1st of January 2006 and the consumer acceptance of products produced in that way is low. Around a decade ago saponins, secondary plant metabolites, have been found to be potential alternatives for aquafeeds. Saponinmixtures derived from the South American soap bark tree Quillaja saponaria, have been found to have beneficial effects on growth, feed and nutrient utilization and on metabolism of common carp Cyprinus carpio and Nile tilapia Oreochromis niloticus. Furthermore, in one of the early experiments a sex ratio in favor of males was observed in saponin fed tilapia compared to control fish not supplemented with saponins. An influence on sex ratio of Nile tilapia would be highly desirable since industrially Nile tilapia production is only financially viable if all male populations are produced since mixed sex tilapia populations tend to reproduce uncontrollable. The production of all male tilapia populations is mainly conducted by feeding the potentially environmentally hazardous and carcinogenic synthetic hormone 17--methyltestosterone to sexually undeveloped tilapia fry. The above mentioned problems led to a joint research project with partners in Israel and Palestine in which this dissertation has been conducted. The aim of the project was the fractionation of crude saponin extract derived from fenugreek Trigonella foenum-graecum and its testing in vitro and in vivo. It was assumed that a higher biological activity could be achieved if saponin fractions instead of crude mixtures would be applied. After in vitro testing, different saponin fractions or eluates, have been tested on their effects on growth, feed and nutrient utilization, metabolism, proximate composition, gene expression of GH and IGF-1, sex ratio, reproduction and gonad histology. Most of the feeding experiments were conducted with Nile tilapia but one experiment was also conducted with carp. Three of the feeding experiments have been conducted in a system capable of measuring continuous respiration of the fish. Another experiment has been conducted at a field station at Jericho, Palestine. The experiments conducted to evaluate the influence of saponin fractions on sex ratio of undifferentiated tilapia fry have been conducted primarily in a flow-through system. The tested saponin fractions and a tested sapogenin are not suitable to produce male monosex tilapia populations. The sex ratios after supplementation of diets of mixed sexed tilapia fry did only in one case show a significantly higher proportion of males than the control. In a larger scale repetition of that experiment the previous observations could statistically not be proofed. It must be assumed to be random effects or be the result of initially biased sex ratios after stocking undifferentiated tilapia fry. An experiment in which genetically female tilapias were fed with two fenugreek saponin fractions and positive and negative controls supported that finding. A long term feeding experiment conducted at Jericho revealed no influence of the long and short term supplemented Q. saponaria saponin mixtures on sex ratio and reproduction of genetically female tilapia. A similar laboratory experiment with fenugreek saponin fractions could not be evaluated in that regard. The experiments evaluating the effects of the saponin fractions on growth, feed and nutrient utilization, gene expression of GH and IGF-1 and proximate composition revealed no significant differences. But in all experiments one fraction eluated with 60%/40% (v/v) methanol/water showed numerically improved values compared to control and other fractions. Furthermore one fraction eluated with 40%/60%/ (v/v) methanol/water gave constantly numerically inferior results of tested parameters compared to control. That supports the conclusion that the 40% methanol fraction contains saponins generally referred to as anti-nutrients. In only one experiment, conducted at Jericho, significantly higher growth was observed after long term supplementation with a Q. saponaria saponin mixture containing elevated sapogenin content. The presented data in this thesis is not supporting an application of the tested saponin fractions as environmentally friendly alternative to methyltestosterone to produce all male populations of tilapia or to inhibit uncontrollable reproduction. Additional experiments are needed to evaluate different modes of application like immersion treatments or injections since during the experimental work of this thesis all tested saponins were added to the feed. An application of the tested fenugreek saponin fractions as growth promoters yields a higher potential although the experimental results are based upon low sample sizes due to capacity restrictions of the respirometric system. Therefore a repetition under near commercial or commercial conditions must be considered.
Strengthening accoutability in public agricultural extension services : a case study from Uganda
(2019) Namyenya, Angella; Birner, Regina
A well-managed and accountable agricultural extension service can play an essential role in realizing food security and improving rural livelihoods. However, for the majority of the developing countries, establishing an accountable agricultural extension system remains a challenge. Public agricultural extension services, in particular, have been highly criticized for weak accountability of field agents to both their supervisors and their clients. Public agricultural extension systems often deploy large numbers of field agents in geographically dispersed, remote areas, which makes supervision difficult. Typically, there is also a lack of resources and of robust mechanisms to enable both the supervisors and beneficiaries to adequately follow up the activities of the field agents and provide feedback, which contributes to problems of absenteeism of field staff. Due to resource constraints, central managers also face challenges to supervise the agricultural extension managers, who are the supervisors of the field agents. Taking Uganda as a case study, this thesis explores the use of new mechanisms for addressing these long-standing challenges of creating accountability in public agricultural extension services. The thesis had three objectives: (1) To design a diary for agricultural field agents, which should facilitate planning and supervision of agricultural extension service provision; (2) to assess the potential of different versions of this diary for strengthening accountability in public extension services; and (3) to analyze the performance of agricultural extension managers. To meet the first two objectives, three versions of a diary for agricultural field agents were designed. The first version was a diary in a paper format, which was specifically designed to match the system of planning and reporting applied in Uganda’s public extension service. This version was then transformed into an electronic version of the diary (“e-diary”), which resembled an electronic questionnaire. Based on the assessment of these two diary versions, an improved e-diary was developed, which comprises a smartphone application to be used by the field agents, and a web-based system that allows extension supervisors to review the data entered by the field agents and provide them with feedback. Moreover, the system was designed in such a way that it is possible for extension supervisors to collect information from the beneficiaries for verification. For the assessment of the three different versions of the diary, a qualitative participatory research approach was applied. Data on the experience with using the diary was collected through a combination of focus group discussions and individual face-to-face interviews. The content analysis method was applied to analyse the data. The results suggest that a diary for agricultural field agents has a unique potential to strengthen accountability in public agricultural extension services. This is achieved through improving planning, reporting, monitoring and evaluation of extension activities and through reducing absenteeism as well as enabling of beneficiary feedback. The findings further indicate that, for the following reasons, an electronic version of the diary is more effective in strengthening accountability than a paper version: An e-diary can make use of the Global Positioning System (GPS), which allows extension supervisors to verify whether field agents actually conducted the activities that they indicate in the diary. Thus, an e-diary enables remote supervision, which reduces the time and costs of supervision. An e-diary also facilitates real-time reporting, which enables near real-time supervision, thereby increasing the frequency of supervision. However, the first e-diary version that resembled an electronic questionnaire had drawbacks, since it focused on data collection and had limited opportunities for feedback and interaction between the extension agents and their supervisors. However, the final e-diary version, which combines a smartphone app with a web-based system, made it possible to address this limitation. Expectedly, the assessment also revealed some limitations regarding the e-diary. Some of the users were initially apprehensive about the e-diary due to their limited experience with the use of smartphones. Consequently, the implementation of the e-diary necessitates intensive training of the users, which should not be underestimated. The results also showed that the use of the e-diary was affected by inaccessibility to electricity. Therefore, promoting the use of solar chargers or power banks in areas with poor electrification is recommended. Moreover, limited network coverage implies that the e-diary needs to be programmed in such a way that data can be entered off-line. Furthermore, the findings suggest the need to combine the implementation of the e-diary with incentives, such as awards of recognition. In view of the essential role that extension managers, as the supervisors of the field agents, play for accountability, an analysis of their performance was included as the third objective of the thesis. To meet this research objective, a quantitative research approach was applied. The main data source was the extension management system that was set up by the Ugandan Ministry of Agriculture, Animal Industries and Fisheries (MAAIF). This system provides data on the timeliness of the submission of work plans and reports by the extension managers, which makes it possible to calculate measurable indicators of managers’ performance based on their expected roles and responsibilities. In addition to preparing descriptive statistics of such performance indicators, econometric models were estimated, using additional data from secondary sources on variables, which were hypothesized to influence the managers’ performance. The descriptive statistics of the performance indicators showed that the majority of the extension managers were not able to meet the performance requirements of MAAIF. The econometric analysis made it possible to identify factors that were associated with performance. The amount of the extension grant provided to the district and the ratio of extension workers to households were found to be key factors. The findings led to the recommendation to improve the performance of the extension managers through capacity building, especially in management, and through setting-up a strict performance monitoring system, to which the use of the e-diary could contribute. It was also recommended to increase funding to the districts and improve the ratio of extension workers to households so as to provide better working conditions and incentives to extension staff and their managers. Overall, the thesis indicates that diaries, especially electronic ones, in combination with monitoring systems for extension managers, offer a unique and largely underutilized potential to address entrenched problems of ensuring accountability in public agricultural extension services. It was also pointed out that additional accountability mechanisms will be useful to further strengthen accountability, in particular mechanisms that allow the beneficiaries of the extension service to provide direct feedback on the quality of service provision. The thesis also highlights the potential of using digital tools for strengthening both upward and downward accountability in public extension services. The findings of the thesis are likely to be relevant not only for agricultural extension services but also for other public services, such as rural health care and education, which face similar problems of managing large numbers of field agents in geographically dispersed, remote areas, where effective supervision is an inherent challenge.