Household and Community Factors Affecting Development of Small-Scale Fish Farming in Africa

2019 ◽  
pp. 211-231
Author(s):  
Kenneth Ruddle
Keyword(s):  
Fish Farming ◽  
Small Scale ◽  
Factors Affecting ◽  
Community Factors

SUBMERGED CITRIC ACID FERMENTATION OF SUGAR BEET MOLASSES: INCREASE IN SCALE

1955 ◽  
Vol 1 (5) ◽  
pp. 299-311 ◽  
Author(s):  
R. Steel ◽  
C. P. Lentz ◽  
S. M. Martin
Keyword(s):  
Citric Acid ◽  
Scale Up ◽  
Aeration Rate ◽  
Small Scale ◽  
Acid Fermentation ◽  
Inoculum Level ◽  
Cross Sectional ◽  
Factors Affecting ◽  
Beet Molasses ◽  
Initial Ph

Factors affecting the production of citric acid in the submerged fermentation of ferrocyanide-treated beet molasses by Aspergillus niger were studied in 2.5 and 36 liter fermenters. The small fermenters were used to determine the effects of changes in sterilization technique, phosphate supplement, ferrocyanide treatment, inoculum level, initial pH, fermentation temperature, and aeration rate. The relation between ferrocyanide concentration and inoculum level was also studied. Four different samples of molasses were fermented successfully. An average yield of 8.2% citric acid (64% conversion) was obtained from 51 small-scale fermentations. Comparable yields were obtained in the large fermenters under comparable conditions. Most of the information obtained with the small fermenters was applicable to the larger-scale fermenters, but in the latter the fermentation was significantly more stable. Aeration was the main problem in the scale-up and aeration rates approximately double those calculated on a fermenter cross-sectional area basis were required for comparable results in the large fermenters.

Species Responses to Grazing and Environmental-Factors in an Arid Halophytic Shrubland Community

1987 ◽  
Vol 35 (2) ◽  
pp. 135 ◽  
Author(s):  
RB Hacker
Keyword(s):  
Environmental Factors ◽  
Soil Salinity ◽  
Large Scale ◽  
Chemical Properties ◽  
Grazing Pressure ◽  
Aerial Photographs ◽  
Small Scale ◽  
Factors Affecting ◽  
Species Responses

Species responses to grazing and environmental factors were studied in an arid halophytic shrubland community in Western Australia. The grazing responses of major shrub species were defined by using reciprocal averaging ordination of botanical data, interpreted in conjunction with a similar ordination of soil chemical properties and measures of soil erosion derived from large-scale aerial photographs. An apparent small-scale interaction between grazing and soil salinity was also defined. Long-term grazing pressure is apparently reduced on localised areas of high salinity. Environmental factors affecting species distribution are complex and appear to include soil salinity, soil cationic balance, geomorphological variation and the influence of cryptogamic crusts on seedling establishment.

scholarly journals Small scale fish farming in seasonal ponds in Brazil: technical and economic characterization

2018 ◽  
Vol 46 (2) ◽  
pp. 314-329 ◽  
Author(s):  
Adriana Ferreira ◽  
Ana Oeda ◽  
Patricia Oliveira ◽  
Adriano Prysthon ◽  
Roberto Valladao ◽  
...  
Keyword(s):  
Fish Farming ◽  
Small Scale ◽  
Seasonal Ponds

scholarly journals Profitability Analysis and Factors Influencing Profit Level of Small-Scale Broiler Farmers in Nigeria

2020 ◽  
pp. 127-135
Author(s):  
Afodu Osagie John ◽  
Shobo Bolatito Adenike ◽  
Ayo-Bello Taofeek Ayodeji ◽  
Abasilim Chinwe Frances
Keyword(s):  
Sampling Technique ◽  
Educational Status ◽  
Study Data ◽  
Small Scale ◽  
Factors Affecting ◽  
Logit Regression ◽  
Profitability Analysis ◽  
Cost Of Drugs ◽  
Multistage Sampling ◽  
Selection Of

Broiler birds are widely praised for its palatability and nutritious values which are mainly for meat purpose, and also serves as source of income to many households in Nigeria. The broiler industry is faced with high cost of production thereby reducing the farmers profit. The study was conducted in three Geopolitical zones in Nigeria. A multistage sampling technique was adopted for this study for the selection of 540 broilers farmers out which 392 returned a well filled questionnaire where data were extracted for the study. Data for this study were analysed using descriptive (frequency and percent) budgetary analysis and inferential (Logit regression) statistics. Factors affecting the profit level of broiler farmers were age (γ1= -0.145, p= 10%), households size (γ3= -5.477, p=10%), educational status of the farmers (γ4= 0.228, p= 5%), number of birds (γ7= 0.575, p= 5%), cost of feed (γ8= -1.022, p= 1%), cost of water (γ9= -1.277, p= 1%), cost of drugs (γ10= -1.640, p= 5%) and cost of chick (γ11= -7.104, p= 1%). Young people should be encouraged to be involved in production of broiler, since agriculture has aging population and help in employment creation. Farmers should maintain a low number of households so as to increase their profit. The farmers should have some forms of education on the production of broilers so as to enhance their profit.

scholarly journals Toward Future Installations: Mutual Interactions of Short Intakes With Modern High Bypass Fans

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Nagabhushana Rao Vadlamani ◽  
Teng Cao ◽  
Rob Watson ◽  
Paul G. Tucker
Keyword(s):  
Pressure Fluctuations ◽  
Limiting Factors ◽  
Small Scale ◽  
Flow Distortion ◽  
Factors Affecting ◽  
Fan Performance ◽  
Shock Unsteadiness ◽  
Power Spectral ◽  
Order Of Magnitude ◽  
Underlying Mechanisms

In this paper, we investigate the coupled interaction between a new short intake design with a modern fan in a high-bypass ratio civil engine, specifically under the off-design condition of high incidence. The interaction is expected to be much more significant than that on a conventional intake. The performance of both the intake-alone and rotor-alone configurations are examined under isolation. Subsequently, a comprehensive understanding on the two-way interaction between intake and fan is presented. This includes the effect of fan on intake angles of attack (AoA) tolerance (FoI) and the effect of circumferential and radial flow distortion induced by the intake on the fan performance (IoF). In the FoI scenario, the rotor effectively redistributes the mass flow at the fan-face. The AoA tolerance of the short-intake design has increased by ≈4 deg when compared with the intake-alone configuration. Dynamic nature of distortion due to shock unsteadiness has been quantified. ST plots and power spectral density (PSD) of pressure fluctuations show the existence of a spectral gap between the shock unsteadiness and blade passing, with almost an order of magnitude difference in the corresponding frequencies. In the IoF scenario, both the “large” (O(360 deg)) and “small” scale distortion (O(10–60 deg)) induced by the intake results in a non-uniform inflow to the rotor. Sector analysis reveals a substantial variation in the local operating condition of the fan as opposed to its steady characteristic. Streamline curvature, upwash, and wake thickening are identified to be the three key factors affecting the fan performance. These underlying mechanisms are discussed in detail to provide further insights into the physical understanding of the fan-intake interaction. In addition to the shock-induced separation on the intake lip, the current study shows that shorter intakes are much more prone to the upwash effect at higher AoA. Insufficient flow straightening along the engine axis is reconfirmed to be one of the limiting factors for the short-intake design.

scholarly journals Agricultural Practices in Lawngtlai Rural Development Block of Mizoram

2021 ◽  
Vol 5 (2) ◽  
pp. 01-08
Author(s):  
R. Lalthankhumi ◽  
Joseph Lalmalsawma
Keyword(s):  
Rural Development ◽  
Agricultural Practices ◽  
Relevant Information ◽  
Small Scale ◽  
Agricultural Practice ◽  
Factors Affecting ◽  
Horticultural Crops ◽  
Shifting Agriculture ◽  
Development Block ◽  
Major Factors

Agriculture constitutes one of the major sources of income among the people of Mizoram. The areas used for cultivation in Mizoram are usually slashed and burnt down to ashes and are abandoned for years, the land is used and the same plot is re-use after 3-5 years. More than half of the total population is either directly or indirectly involved in agriculture. However, the income from agriculture is less than 5% of the State Gross Domestic Product (State Economic Report, 2015). In the last few decades Mizoram witnessed several changes in agriculture pattern as many farmers have been shifting from cultivation to small- scale agricultural farming. This paper highlights the transformation of agricultural practices and the major factors affecting agricultural production and attempt is made to examine the prevailing socio- economic aspects associated with farmers with special reference to Lawngtlai Rural Development Block and a questionnaire method was used for collecting relevant information for the purpose. The research found that there exist major transformations of agricultural practices in the last couple of decades. The cycle of shifting agriculture period has been shortened drastically. It is also revealed that farmers are gradually adopting settled farming from shifting agriculture and that government intervention and assistance has been increasing more and more in this field. It is suggested that agricultural practice be transformed from jhuming to settled farming and from cultivating the traditional crops to cash crops with governmental and institutional support for shifting to higher income in agricultural and horticultural crops.

scholarly journals Adoption of sea cage farming of cobia (Rachycentron canadum) by fishermen self-help groups as a diversified livelihood option: A success story from Ramanathapuram District, Tamil Nadu

2019 ◽  
Vol 66 (3) ◽  
Author(s):  
B. Johnson ◽  
A.K. Abdul Nazar ◽  
R. Jayakumar ◽  
R. Jayakumar ◽  
G. Tamilmani ◽  
...  
Keyword(s):  
Tamil Nadu ◽  
Fish Farming ◽  
Small Scale ◽  
Market Demand ◽  
Rachycentron Canadum ◽  
Self Help ◽  
Sea Cage ◽  
Self Help Groups ◽  
Pellet Feed ◽  
Fast Growth Rate

The ICAR-Central Marine Fisheries Research Institute (ICAR-CMFRI) is the pioneer in developing the technology for cage fish farming in India . Cobia (Rachycentron canadum) grows relatively fast in cages and is very much suited for carrying out small scale mariculture to meet the alternate livelihood needs of fisher-folk. Mandapam Regional Centre of ICAR-CMFRI has developed the technology for breeding, seed production and farming of cobia in cages and organised training, and frontline/participatory demonstration programmes which have aided in creating awareness about the techno-economic viability of cage farming among the fisherfolk in Ramanathapuram District, Tamil Nadu. A survey was taken up among a sample of 75 members of fisher self help groups (SHGs) who had adopted cage farming of cobia, inorder to assess their perception and attributes about the technology as well as the constraints faced by them. The study found that fast growth rate of cobia, shorter culture period, good farm gate price, high market demand, ease of farming near the seashore and seed availability were the important attributes which attracted the fishermen groups to take up the farming. The innovations introduced by the fishers in cage farming technology were also documented. Majority of the fishers stated, non-availability of seed during peak stocking season, high cost of pellet feed, fluctuating cost of low value fishes which are used as feed for cobia and poaching as major constraints in cage farming.

Factors affecting use of veterinarians by small-scale food animal operations

2013 ◽  
Vol 243 (9) ◽  
pp. 1334-1344 ◽  
Author(s):  
Andrea L. Beam ◽  
Dawn D. Thilmany ◽  
Lindsey P. Garber ◽  
David C. Van Metre ◽  
Randy W. Pritchard ◽  
...  
Keyword(s):  
Small Scale ◽  
Factors Affecting ◽  
Food Animal
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