Aboveground Net Primary Productivity in Grazed and Ungrazed pastures: Grazing Optimisation Hypothesis or Local Extinction of Vegetation Species

The controversy that has surrounded herbivory studies in the last few decades prompted our investigation to establish the extent to which herbivore optimisation hypothesis or compensatory growth evidence is real. We used the traditional movable cage method to collect primary productivity data on herbage, functional groups and key individual grass species in various controlled large herbivore treatments in an east African savanna. The herbivore treatments in triplicate blocks included cattle, wild herbivores with and without mega herbivores and combinations of cattle and wild herbivores also with and without mega herbivores. The findings revealed that at herbage level, most grazed treatments (four out of five) had higher productivity than the ungrazed control and three showed grazing optimisation curve at sixth polynomial degree between monthly productivity and grazing intensity (1-g/ng). At functional group level forbs productivity was higher in the ungrazed control than in any of the grazed treatments while at individual grass species level _Themeda triandra_ productivity was higher in all grazed treatments than in ungrazed control. We conclude against presence of herbivore optimisation hypothesis at herbage, functional group and species level because of lack of attributable grazing effect in grazed treatments that matches complex ecological effects in the ungrazed treatment

Resilient seed systems for climate change adaptation and sustainable livelihoods in the East Africa subregion. Report of the consultative workshop, 5-8 March 2019, Entebbe, Uganda

This report presents the main results of the consultative start-up workshop for the ‘Resilient seed systems in East Africa’ initiative which aims to combine and scale from the local to the global level, successful strategies, methods and tools that increase the timely availability, affordability and improved access by women and men farmers and their communities, to good-quality seed of a portfolio of crops and crop varieties, including novel crops and varieties that are better adapted to current and predicted future climate conditions

Success rate of crowns and fixed partial dentures provided to patients at the School of Dental Sciences, University of Nairobi

Objective: To evaluate the success rate of crowns and conventional fixed partial dentures provided to patients at the School of Dental Sciences, University of Nairobi.Design: Descriptive cross-sectional study.Setting: School of Dental Sciences, University of Nairobi.Subjects: 97 patients (35 male, 62 female) who had been provided with a total of 150 prostheses at the School of Dental Sciences between 2009 and 2015.Materials and Methods: An interviewer administered questionnaire was used to collect information on socio-demographic data, oral hygiene practices, pain/sensitivity associated with prosthesis, level of satisfaction with the prosthesis and frequency of dental visits. A clinical and radiographic evaluation was conducted for the crowns and fixed partial dentures.Results: The success rate for Fixed Partial Dentures (FPDs) was 75.4% (95% CI: 54.88-95.85%). A statistically significant association was demonstrated between FPD design and success (Fisher’s Exact Test = 8.194, p=0.018) and between the position of the fixed partial denture in the mouth and success (X2= 6.596, p = 0.017). The success rate of crowns was 66.7% (95% CI: 48.89-84.45%). A significant association was demonstrated between the level of training of the clinician and the success of crowns (X2 = 7.772, p= 0.009) and between length of service and the success of crowns (Fisher’s exact test = 8.846, p=0.011).Conclusion: The success rate for crowns and FPDs in our study was lower than the success rate reported in similar studies. Whereas the design and location of prosthesis in the mouth had a significant influence on the success of FPDs, the level of training of clinician and length of service had a significant influence on the success of crowns

Status and Trends of Agricultural and Rural Development Indicators in the COMESA Region

This report is divided into eight sections, section one provides an introduction about the COMESA region and the structure of the economy in the region. Section two presents trends of various socioeconomic indicators in the region. Section three contains gender related information while section four focuses on food security in COMESA. Some examples of subnational food security situations are also given here. Section five focuses on various indicators related to agriculture in COMESA including agriculture and food production, input utilization in agriculture, and application of irrigation in agriculture. Section six provides information on expenditures in agriculture and agricultural value addition in the region. In section seven, various indicators on trade are reviewed. The last section, section eight, contains summary, conclusions, and policy recommendations

Carpet characteristics of eichhornia crassipes [mart.] solms (water hyacinth) in the Winam gulf (lake victoria, Kenya)

The occurrence and spread of the water hyacinth (Eichhornia crassipes [Mart.] Solms), in the Winam gulf has created numerous attributes to the human population that live around the lake, thereby making its control a priority. Navigation within the lake is a major economic activity that has been greatly affected. Before this study, little was known about the characteristics of these weed carpets, and specifically the weight that a healthy inter-connected or entangled carpet can support before it was able to sink or even get submerged. Can a light herbivore or human stranded in the lake walk on a healthy carpet to safety?. In order to better understand these unknown, a study was initiated at five locations (i.e; Dunga beach, Kisumu pier, Kusa, Kobala and Kendu bay) within the lake that appeared to contain healthy dense carpets. Carpet connectivity, mat buoyancy, distribution of mass, biomass density, rhizome length and population density were calculated. Carpet connectivity was determined as the difference in pressure when weights were added on a mesh wire measuring 0.434m2 until the carpet submerged and the pressure on the same carpet that was required to submerge it after a complete disconnection. Standing population density was determined by counting the number of plants found within quadrants measuring 1 m2; while biomass density was determined when oven dried plant materials collected from quadrants measuring 1 m2 was weighed. Plant mass and rhizome length measurements were correlated, while population density was correlated to biomass density. These observations show that water hyacinth distribution in the Winam gulf is seasonal and adopts residence in secluded bays, carpets measuring 0,434m2 in size that have a connectivity of 288.4 Pa (pascals) are able to support a weight of only 12.6 kg, with any additional weight causing them to submerge. Distribution of mass was normal except in locations that are subjected to external factors

An Event History Analysis of Factors Influencing Entry into Parenthood In Nairobi

In this study, we use data from the Urban Integration Survey conducted in 2001 in Nairobi, following the standard that has been adapted in several cities in Africa (Dakar, 1989; Bamako, 1992; Yaounde, 1996 and Antananarivo, 1998), to examine the underlying factors influencing entry into parenthood for men and women during the period of economic crisis. The analysis uses event history methods, specifically the Cox Proportional Hazards Regression model, stratified by generational age and run separately by sex. The results show that the majority of the migrants to Nairobi began childbearing in Nairobi, with migration status having no effect on entry into parenthood when other factors are controlled for. What seems important in delaying entry into union is some form of economic security, while social and economic contexts appeared weak for both men and women. One intriguing result was that there is an almost monotonic increase on the likelihood of entry into motherhood with increase in the level of education

PRISM framework: a paradigm shift for designing, strengthening and evaluating routine health information systems

The utility and effectiveness of routine health information systems (RHIS) in improving health system performance in developing countries has been questioned. This paper argues that the health system needs internal mechanisms to develop performance targets, track progress, and create and manage knowledge for continuous improvement. Based on documented RHIS weaknesses, we have developed the Performance of Routine Information System Management (PRISM) framework, an innovative approach to design, strengthen and evaluate RHIS. The PRISM framework offers a paradigm shift by putting emphasis on RHIS performance and incorporating the organizational, technical and behavioural determinants of performance. By describing causal pathways of these determinants, the PRISM framework encourages and guides the development of interventions for strengthening or reforming RHIS. Furthermore, it conceptualizes and proposes a methodology for measuring the impact of RHIS on health system performance. Ultimately, the PRISM framework, in spite of its challenges and competing paradigms, proposes a new agenda for building and sustaining information systems, for the promotion of an information culture, and for encouraging accountability in health systems

Refining a questionnaire to assess breast cancer knowledge and barriers to screening in Kenya: Psychometric assessment of the BCAM

Background Our study objective was to determine the validity and reliability of the breast module of a cancer awareness measure (BCAM) among adult women in western Kenya. Methods The study was conducted between October and November 2012, following three breast cancer screening events. Purposive and systematic random sampling methods were used to identity 48 women for cognitive focus group discussions, and 1061 (594 who attended vs. 467 who did not attend screening events) for surveys, respectively. Face and psychometric validity of the BCAM survey was assessed using cognitive testing, factor analysis of survey data, and correlations. Internal reliability was assessed using Cronbach’s alpha. Results Among survey participants, the overall median age was 34 (IQR: 26–44) years. Compared to those women who did not attend the screening events, women attendees were older (median: 35 vs. 32 years, p = 0.001) more often married (79% vs. 72%, p = 0.006), more educated (52% vs. 46% with more than an elementary level of education, p = 0.001), more unemployed (59% vs. 11%, p = 0.001), more likely to report doing breast self-examination (56% vs. 40%, p = 0.001) and more likely to report having felt a breast lump (16% vs. 7%, p = 0.001). For domain 1 on knowledge of breast cancer symptoms, one factor (three items) with Eigen value of 1.76 emerged for the group that did not attend screening, and 1.50 for the group that attended screening. For both groups two factors (factor 1 “internal influences” and factor 2 “external influences”) emerged among domain 4 on barriers to screening, with varied item loadings and Eigen values. There were no statistically significant differences in the factor scores between attendees and non-attendees. There were significant associations between factor scores and other attributes of the surveyed population, including associations with occupation, transportation type, and training for and practice of breast self-examination. Cronbach’s alpha showed an acceptable internal consistency. Conclusion Certain subpopulations are less likely than others to attend breast screening in Kenya. A survey measure of breast cancer knowledge and perceived barriers to screening shows promise for use in Kenya for characterizing clinical and community population beliefs, but needs adaptation for setting, language and culture