Academic literature on the topic 'Population density ethiopia'

Abstract We studied the population dynamics of endangered mountain nyala Tragelaphus buxtoni between 2003-2005 in the Bale Mountains National Park. Line-transect sampling and total count methods were used to gather data on demographics and movement patterns. The population's age-group composition was 58% adults, 25% sub-adults, 9% juveniles, 5% calves and 3% unidentified with a female-male sex ratio of 2:1. Population density was found to be significantly different between the two sub-populations (Dinsho Sanctuary and Gaysay/Adelay). A significant difference was found for age-group composition across the two sub-populations except adult females, sub-adult males and calves. The Dinsho sub-population was an isolated group. Separation and containment of the mountain nyala population could have negatively affected their ability to search for habitat requirements and mates from distant areas. The population varied between 830-908 individuals (95% CI), a reduction of 45% from earlier reports. However, the mean population density increased due to contraction of the species' habitat range. We observed a population decrease of 2%-5% per year over the course of our study. Many of the assessed demographic parameters did not significantly change over the three years. This suggests that the decrease in nyala population was not due to random variations in reproduction. Anthropogenic factors such as competition with livestock for forage, habitat encroachment and poaching by the local people might have been partly responsible for the depleted population in our study areas.

This paper examines the nature of community management of woodlots and investigates the determinants of collective action and its effectiveness in managing woodlots, based on a survey of 100 villages in Tigray, northern Ethiopia. Despite limited current benefits received by community members, the woodlots contribute substantially to community wealth, increasing members' willingness to provide collective effort to manage the woodlots. We find that benefits are greater and problems less on woodlots managed at the village level than those managed at a higher municipality level, and that the average intensity of management is greater on village-managed woodlots. The factors that do significantly affect collective action include population density (higher collective labor input and lower planting density at intermediate than at low or high density), market access (less labor input, planting density and tree survival where market access is better), and presence of external organizations promoting the woodlot (reduces local effort to protect the woodlot and tree survival). The finding of an inverse U-shaped relationship between population density and collective labor input is consistent with induced innovation theory, with the increased labor/land ratio promoting collective effort to invest in resources as population density grows to a moderate level, while incentive problems may undermine collective action at high levels of population density. These findings suggest collective action may be more beneficial and more effective when managed at a more local level, when the role of external organizations is more demand-driven, and when promoted in intermediate population density communities more remote from markets. In higher population density settings and areas closer to markets, private-oriented approaches are likely to be more effective.

Objective. To evaluate the prevalence of metabolic syndrome (MetS) according to the International Diabetes Federation (IDF) and Adult Treatment Panel (ATP) III criteria among working East African adults.Design. This cross-sectional study of 1,935 individuals (1,171 men and 764 women) was conducted among working adults in Addis Ababa, Ethiopia. The study was conducted in accordance with the STEPwise approach of the World Health Organization.Results. According to ATP III and IDF definitions, the overall prevalence of MetS was 12.5% and 17.9%, respectively. Using ATP III criteria, the prevalence of MetS was 10.0% in men and 16.2% in women. Application of the IDF criteria resulted in a MetS prevalence of 14.0% in men and 24.0% in women. The most common MetS components among women were reduced high-density lipoprotein-cholesterol (HDL-C) (23.2%) and abdominal obesity (19.6%); whilst reduced HDL-C concentrations (23.4%) and high blood pressure (21.8%) were most common among men.Conclusion. MetS and its individual components are prevalent among an apparently healthy working population in Ethiopia. These findings indicate the need for evidence-based health promotion and disease prevention programs; and more robust efforts directed towards the screening, diagnosis and management of MetS and its components among Ethiopian adults.

Abstract Objectives Both body fat and lean body mass have important roles in health and wellbeing. It is crucial that researchers and clinicians can accurately measure them, especially in nutritionally vulnerable populations such as people living in rural areas of Ethiopia. Skinfold thickness measurements are one of the few methods to measure % body fat outside of a clinical setting. The validity of the measurements is dependent upon age, sex, and ethnicity. The existing skinfold thickness equations are derived from populations of European descent. This study will demonstrate that existing equations are not valid for Ethiopian adults and create new, sex-specific equations for this population. Methods Skinfold thickness will be measured on 250 adults recruited from Jimma City, Ethiopia. Percent body fat will be calculated using several existing skinfold thickness equations. For women, the equations are the Sloan; Jackson, Pollock, & Ward; and Durnin and Wormsley. The equations for men are Sloan; Jackson and Pollock; and Durnin and Wormsley. The results of these equations will then be compared against % body fat measured by a BodPod. Pearson's correlation coefficient and Bland-Altman plots will be used to assess the validity of each calculation. Stepwise forward regression will be used to determine new sex-specific equations. Results In women, the Sloan equation had moderate correlation (0.59) while Jackson, Pollack, and Ward and the Durnin and Wormsley equations had near-perfect correlation (0.81 and 0.88 respectively). In men, the Sloan equation had substantial correlation (0.79) while the Jackson and Pollack and the Durnin and Wormsley had near-perfect correlation (0.89 and 0.85 respectively). Scatter and Bland Altman plots showed that all equations underestimated the % body fat measured compared to a BodPod requiring new equations. For women: body density = 1.068892 − 0.00088 x −0.0005412 y − 0.0012765 z. Where x is the skinfold thickness at the suprailiac crest, y is thigh, and x is subscapular. For men: body density = 1.08899 −0.0014585 m −0.0008318 n. Where m is abdominal skinfold thickness and n is thigh skinfold thickness. Conclusions The current most commonly used skinfold thickness equations are not valid for use in Ethiopian adults. The equations put forth in this analysis should be used for this population. Funding Sources H.E. Babcock Fund, NIDDK/NIH.

Africa has been undergoing a rapid urbanization process, which is critical to the achievement of the 11th Sustainable Development Goal (SDG11). Using population density data from LandScan, we proposed a population density-based thresholding method to generate urban land and urban population data in Africa from 2001 to 2019, which were further applied to detect the spatiotemporal characteristics of Africa’s urbanization. The results showed that urban land and urban population have both grown rapidly in Africa, which increased by about 5.92% and 4.91%, respectively. The top three countries with the most intense urbanization process in Africa are Nigeria, the Democratic Republic of the Congo, and Ethiopia. The coupling relationship index of urban land expansion and population growth was 0.76 in Africa during 2001–2019. Meanwhile, the total proportion of uncoordinated development types at the provincial level was getting higher, which indicated an uncoordinated relationship between urban land expansion and population growth in Africa. Cropland, grassland, rural land, and forests were the most land-use types occupied by urban expansion. The proportion of cropland, grassland, and forests occupied was getting higher and higher from 2001 to 2019. The extensive urban land use may have an impact on the environmental and economic benefits brought by urbanization, which needs further research.

Field experiments were carried out in 2016 and 2017 cropping seasons under on-farm conditions in Lemuna Bilbilo District, Southeastern Ethiopia to evaluate the effects of three varieties Degaga, Gora, Moti, and six plant populations (10, 25 (control), 30,50, 70, and 90 plants m-2) on faba bean specific yield and yield components. The experiments were laid out in a randomized complete block design in split plot arrangement in which varieties were assigned to main plots and plant populations to subplots with three replications. The year combined analysis of data revealed that seed yield, total biomass yield and test weight of seed were significantly (p<0.05) affected by varieties and plant population densities m-2. The highest seed yield (4649, 4594 and 4162 kg ha-1) was obtained at 90,70 and 50 plant m-2 for Degaga, Moti and Gora varieties respectively but, no significant difference between control for Degaga and Moti varieties. The highest total biomass of 9 t ha-1 was recorded from the highest 90 plant population m-2 though not significantly different to the total biomass obtained from 70, 50 and 25 (control) plants m-2. Gora variety significantly recorded the highest test weight of seed (889.2g) than the rest Degaga and Moti varieties. In short, founded on studied agronomic parameters of faba bean, 25 plant population density m-2 was economically recommended for Degaga and Moti varieties whereas, 50 plant population density m-2 was for Gora variety.

The population status of oribi (Ourebia ourebi Zimmermann, 1783) was carried out in the newly established Maze National Park, Ethiopia for two consecutive years (October 2009 to December 2011). A total count method was employed based on silent detection method in an area of 220 km2. A total of 894 and 1103 individuals were counted during the two consecutive years, respectively. Seasonal variation was significantly different with more individuals during the dry season than the wet season (p<0.05). The density of oribi over the whole area was 3.40 and 4.36 during the wet and 4.72 and 5.66 individuals per km2 during the dry seasons in both years, respectively. The study was important for future conservation measures as the oribi is the flagship species of the area.Bangladesh J. Zool. 41(2): 145-151, 2013

The phenotypic diversity of 32 landrace populations of tetraploid wheats originating from the Bale and Wello regions of Ethiopia was studied. Eight heritable qualitative traits (glume hairiness, glume colour, awnedness, awn length, beak awn, awn colour, spike density, seed colour) were measured on 2453 individual plants (45–110 plants per landrace). The frequencies of each phenotypic class were used to estimate and analyse the diversity at different levels (population, altitude, region). Beak awn and seed colour showed the highest diversity index, and glume hairiness the lowest. Glume hairiness, glume colour, beak awn and awn colour were regionally variable, while gradients across altitude were observed for glume hairiness, glume colour and beak awn. Variation was, however, largely due to the differences in the level of the different characters within populations. On a regional basis, a higher mean diversity index was observed for materials from Wello than from Bale. No drastic change in the overall diversity between these collections and those analysed in the 1970s was evident.

Cut roses industries, new income resource in Ethiopia, most of flower industries are established near and around to Addis Ababa city, especially in west and east Shewa zones, most of flower enterprise established by foreigner, which is enhance global economy and creates jobs opportunity. Red spider mite, Tetranychusurticae is the major obstacles for flower production here in Ethiopia, in order to increase the quality and quantity of flower production need to plan different control strategies. Objective of this study was to evaluate the efficacy of these naturally occurring bacteria in controlling the red spider mite in rose flower farms. This experiment was donning on Menagesh, Gallica flower farm and the variety was Limbo flower, the application time was at flowering stage. Two rounds at the rate of 7ml/l by using Motorized knapsack sprayer for four consecutive months. The analysis of variance on mite count data after the application of Bitoxybacillin (Bt) and Abamectin 1.8%EC showed no significant difference (p>0.05) even after 21 days after the second spray (Table 1). However, the population density of the spider mite in Bt treated plots was very low in all sampling dates compared to the untreated check and Abamectin. The pest population (original data) after three weeks of the Bitoxybacillin applications was 68.1 per stem compared to Abamectin 1.8%EC (125.1) and control (110.57) indicating the registered miticide failed to suppress the mite population in roses. Bitoxybacill, would be advisable to have it registered in Ethiopia as alternative synthetic miticides for the control of red spider mite in Integrated Pest Management program.

The thesis presented the results of an investigation into livelihood strategies of rural households in the Hararghe Highlands in the context of population pressure. The human welfare and resource outcomes of rural livelihood strategies were assessed, accounting for the “mediating” factors. The study enriches the current policy debate on how to create an enabling environment to strengthen sustainable rural livelihoods and mitigate adverse welfare and resource consequences of unsustainable rural livelihood strategies. The sustainable livelihood framework for analysing rural livelihoods in the context of population pressure was modified in the thesis to guide the analyses. Primary data was obtained from 197 randomly selected households from three representative sites in the Hararghe Highlands. Whilst verbal description, interpretation and appreciation of facts, and case studies were used for the qualitative data analysis, multivariate techniques and logistic regression were employed to analyse the quantitative data. The study showed that subdivision and fragmentation of agricultural land and re-emergence of landlessness have accompanied the unprecedented population growth in the Hararghe Highlands. The pace of demographic change of the area is so fast that it has caused failure of indigenous countervailing and adaptations. Sufficient effective demand for sustainable intensification of smallholder farms has, however, not been created due to uncertain right to the land and inadequate market incentives. Furthermore, the technology generation and dissemination systems have failed to build the capacity of smallholder farmers to respond to the demographic pressure in a sustainable way. This has generally resulted in negative welfare and resource outcomes. Nonetheless, rural households pursue heterogeneous livelihood strategies due to differential access to livelihood assets, and heterogeneous constraints and incentives. The nature and the extent of welfare and resource outcomes of rural livelihood strategies are different across sites and among different households. A livelihood strategy that integrates cash crop production with high external input-based staple crops production and trade was found to be more successful. Overall, the findings challenge the current untargeted and uniform intervention that implicitly assumes that only farming and the intensification of staple crop production for food self-sufficiency is important to all households. Furthermore, the findings challenge the over simplified generalisations regarding the human welfare and resource effects of rural population growth in Ethiopia as if the interactions between them were taking place in a political, an institutional and an agro-climatic vacuum and as if rural households in a district, a sub-district or a village were a “homogeneous” group. What is thus needed is decentralisation of rural development planning and building of the capacity of local institutions so that they may be able to understand rural livelihoods and design innovative and locally specific integrated interventions to support sustainable rural livelihoods. The specific recommendations include ensuring land tenure security, improving farmers’ access to the market and appropriate technologies, creating conducive environment for commercialisation and livelihood diversification, institutionalised safety net, resettlement and family planning.
Thesis (PhD (Rural Development Planning))--University of Pretoria, 2006.
Agricultural Economics, Extension and Rural Development
unrestricted

M.K. Mikels and Company is a manufacturer that serves mainly as a supplier for the building industry in Israel. The company makes glues and related products used to construct buildings. To begin with, several factors have contributed to the current high price of housing in Israel, including waves of immigration from Russia and Ethiopia during the 1990s, demand created by young couples for housing, and heavy population density in the main cities. These factors particularly accelerated demand for construction of new apartments in this decade, giving rise to an increase in activity for the Israeli construction industry and its suppliers, including M.K. Mikels.