An open system for farming black soldier fly larvae as a source of proteins for smallscale poultry and fish production

2017 ◽  
Vol 3 (1) ◽  
pp. 51-56 ◽  
Author(s):  
E.M. Nyakeri ◽  
H.J. Ogola ◽  
M.A. Ayieko ◽  
F.A. Amimo
Keyword(s):  
Open System ◽  
Production Costs ◽  
Protein Source ◽  
Animal Origin ◽  
Small Scale ◽  
Smallholder Farming ◽  
Crude Fibre ◽  
Black Soldier Fly ◽  
Animal Feeds ◽  
Study Results

The utilisation of insect as ingredients for animal feeds has gained considerable interest recently. For example, the potential of black soldier fly (Hermetia illucens; BSF) larvae as a cheap alternative protein source for animal feeds seems to show promising perspectives, especially for poultry and aquaculture feeds. In the present study, we sought to establish the wild availability of BSF in Bondo area of Western Kenya, and to develop appropriate methods for larvae farming for utilisation in smallholder farming systems using organic waste substrates. Using an open system involving a larvae feeding structure, study results showed that BSF is native to the study area with higher production observed on substrates of plant origin compared to those of animal origin. Proximate, mineral and vitamin analysis showed that wild BSF larvae contained: 40% crude protein, 33% crude fat, 15% ash, 12% crude fibre, 0.56% manganese, 3.07% sodium, 0.57% iron, 2.27% potassium, 0.24 mg/100 g thiamin, 2.2 mg/100 g riboflavin and 1.3 mg/100 g vitamin E. This nutritional profile of the wild BSF larvae indicates its potential to serve as a cheap and sustainable substitute protein source. We therefore recommend small-scale poultry and fish farmers to adopt the identified methods for its cultivation as a way of lowering production costs and also contributing to environmental hygiene and sanitation.

scholarly journals Technical basis for the small-scale production of black soldier fly, Hermetia illucens (L. 1758), meal as fish feed in Benin

2021 ◽  
Vol 4 ◽  
pp. 100153
Author(s):  
Armel Gougbedji ◽  
Pamphile Agbohessou ◽  
Philippe A. Lalèyè ◽  
Frédéric Francis ◽  
Rudy Caparros Megido
Keyword(s):  
Small Scale ◽  
Fish Feed ◽  
Scale Production ◽  
Black Soldier Fly ◽  
Hermetia Illucens ◽  
Technical Basis

scholarly journals Feeding strategies for small-scale rearing black soldier fly larvae (Hermetia illucens) as organic waste recycler

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Daniel Dzepe ◽  
Paulin Nana ◽  
Hervé Mube Kuietche ◽  
Janaina Mitsue Kimpara ◽  
Ornela Magatsing ◽  
...  
Keyword(s):  
Waste Management ◽  
Organic Waste ◽  
Chicken Manure ◽  
Small Scale ◽  
Feeding Strategies ◽  
Black Soldier Fly ◽  
Commercial Chicken ◽  
Continuous Feeding ◽  
Organic Waste Management ◽  
Feeding Diets

AbstractProcessing organic waste using black soldier fly (BSF)-based technology offers a promising alternative for sustainable organic waste management and urban sanitation. This study was conducted to assess the influence of feeding strategies on the efficacy of BSF larvae to recycle organic wastes into value products. Fruit waste and chicken manure were used as organic waste samples while commercial chicken feed was used as a control, and were processed for 15 days in circular plastic containers (Ø 30 × 12 cm) with 50; 100; 150; and 200 mg/larva/day continuous and batch feeding diets, using 500 four-day-old larvae per diet, repeated four times. Larval survival rates were not significantly affected by the feeding strategies. However, average larval biomass of 83.69 ± 13.04 g and 82.46 ± 08.52 g was achieved for the continuous and batch feeding strategies, respectively, under favorable conditions. Larval feed reduction rates ranged from 24.65 ± 03.48% to 72.78 ± 01.48% and 24.52 ± 0.27% to 72.25 ± 12.13% with continuous and batch feeding strategies, respectively, and were significantly affected by the different daily diets. On the other hand, the bioconversion rates ranged from 13.34 ± 0.26% to 50.82 ± 02.27%, and the highest values were observed with the continuous feeding diets. This study confirms the efficacy of BSF larvae to thrive in different organic substrates and shows that the continuous feeding strategy can be better and enhance a sustainable small-scale organic waste management.

The Development of Sweden's R&D-Intensive Electronics Industries: Exports, Outsourcing, and Territorial Distribution

1996 ◽  
Vol 28 (5) ◽  
pp. 783-817 ◽  
Author(s):  
L Suarez-Villa ◽  
C Karlsson
Keyword(s):  
Export Performance ◽  
Plant Size ◽  
Production Costs ◽  
Export Market ◽  
Small Scale ◽  
Performance Variables ◽  
Continuous Innovation ◽  
Spatial Differences ◽  
And Performance ◽  
Employment Characteristics

Sweden's research-intensive electronics industries have thrived by developing export-market niches that rely greatly on continuous innovation and substantial expenditures in R&D. Over the past two decades, three R&D-intensive sectors (telecommunications equipment, electronic instruments, and computing-equipment manufacturing) have experienced a progressive territorial distribution, that has made them less reliant on the metropolitan concentration of the capital for their outsourcing and research arrangements. In this article we explore the relationship between R&D intensity, territorial distribution, subcontracting, and establishment performance in the R&D-intensive electronics industries. The export performance of these industries is considered first, along with its relationship with employment characteristics and territorial location. An analysis of the territorial distribution, and its relationship with establishment downsizing and subcontracting, provides insights on the significance of lower costs and higher R&D intensity for small-scale operations. Statistical analyses of R&D intensity and performance variables that include labour skills, plant size, production costs, fixed capital assets, and profitability, with establishment-level survey data, provide important insights on the effects of subcontracting and any spatial differences resulting thereof.

scholarly journals Poultry farmer response to disease outbreaks in smallholder farming systems

2020 ◽  
Author(s):  
Alexis Delabouglise ◽  
Nguyen Thi Le Thanh ◽  
Huynh Thi Ai Xuyen ◽  
Benjamin Nguyen-Van-Yen ◽  
Phung Ngoc Tuyet ◽  
...  
Keyword(s):  
Avian Influenza ◽  
Low Income ◽  
Low Income Countries ◽  
Farm Size ◽  
Small Scale ◽  
Flock Size ◽  
Smallholder Farming ◽  
Southern Vietnam ◽  
Poultry Farms ◽  
The Impact

AbstractAvian influenza outbreaks have been occurring on smallholder poultry farms in Asia for two decades. Farmer responses to these outbreaks can slow down or accelerate virus transmission. We used a longitudinal survey of 53 small-scale chicken farms in southern Vietnam to investigate the impact of outbreaks with disease-induced mortality on harvest rate, vaccination, and disinfection behaviors. We found that in small broiler flocks (≤16 birds/flock) the estimated probability of harvest was 56% higher when an outbreak occurred, and 214% higher if an outbreak with sudden deaths occurred in the same month. Vaccination and disinfection were strongly positively correlated with flock size and farm size, respectively. Small-scale farmers – the overwhelming majority of poultry producers in low-income countries – tend to rely on rapid sale of birds to mitigate losses from diseases. As depopulated birds are sent to markets or trading networks, this reactive behavior has the potential to enhance onward transmission.One sentence summaryA cohort study of fifty three small-scale poultry farms in southern Vietnam reveals that when outbreaks occur with symptoms similar to highly pathogenic avian influenza, farmers respond by sending their chickens to market early, potentially exacerbating the effects of the outbreak.

scholarly journals Poisoning trends in intensive care unit at secondary care hospital – a pilot study

2019 ◽  
Vol 10 (3) ◽  
Author(s):  
Sri Nanda G ◽  
Balaji S ◽  
Khayati Moudgil
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Pilot Study ◽  
Small Scale ◽  
Hazardous Substance ◽  
Care Hospital ◽  
Global Issue ◽  
Study Results ◽  
Living Organisms ◽  
Collection Form

Poison is known as a toxic and hazardous substance that is capable of causing illness to the living organisms. It can lead to some fatal outcomes. Self-harming has become a global issue, which is a burden on society. Every year millions of people die due to the consumption of toxic compound and leaving their loved ones behind in grief. The prospective pilot study was performed on a small scale for a period of three months. Each type of poison case admitted to Intensive care unit for the three months from July 2018 to September 2018 were taken into consideration. The informed consent has been obtained from all the patients, whereas demographics details of the patient were obtained using a predesigned data collection form. During the study period, 37 cases of poisoning were reviewed. The incidence is found to be more in males 28 (75.6%) when compared to females 9 (24.3%). Our study results showed that pesticides are the major reason for poisoning with an intention of self- harming. Majority of the poisoning cases were seen in the age group of 21-30 where physical and mental stress is the major reason.

scholarly journals A Case Study of Clear-Air Turbulence at Upper Levels

2021 ◽  
Author(s):  
Léo Rogel ◽  
Didier Ricard ◽  
Eric Bazile ◽  
Irina Sandu
Keyword(s):  
Turbulent Flow ◽  
Partial Information ◽  
Weather Prediction ◽  
Turbulent Fluxes ◽  
Small Scale ◽  
Mixing Length ◽  
Vertical Resolution ◽  
Stable Conditions ◽  
Study Results

<p>Because of the technical difficulties of achieving measurements at high altitudes, it is not clear how well turbulent phenomena are represented in the upper levels of current Numerical Weather Prediction (NWP) operational models.<br>Indeed, turbulence in strongly stable conditions near the tropopause is known to be particularly difficult to correctly parameterize. The constraining buoyancy forces on the vertical lead to anisotropic turbulence, potentially inhibiting turbulent production in NWP models.<br>Partial information for high altitude turbulence events is nonetheless available in the form of in-situ measurements from aircrafts. However, it only allows for qualitative comparisons with model outputs.<br>This study focuses on a turbulent episode induced by a winter upper-level jet above east Belgium on January 27, 2018, for which in-situ EDR (Eddy Dissipation Rate) reports indicate moderate-or-greater turbulence levels. Numerical simulations are performed with the Météo-France operational model AROME, and with the mesoscale research model MesoNH (Laero/CNRM), at the same horizontal grid resolution (1.3km). These two models also use the eddy-diffusivity turbulence scheme of Cuxart et al (2000), a 1.5 order closure scheme based on a prognostic Turbulent Kinetic Energy (TKE) evolution equation, with a diagnostic computation of the mixing length.<br>TKE budgets, as well as stability indices and gradient-based quantities (Richardson number, vertical wind shear) are computed from the model outputs, and qualitative comparison with in-situ data is presented. Time evolution of the turbulent event over Belgium is well captured by both models, agreeing with EDR data.<br>Several sensitivity tests on the vertical resolution, on the mixing length formulation and on the parameters of the TKE equation are then performed. Most notably, the use of an increased vertical resolution near the tropopause greatly enhances the turbulent fluxes in both operational and research models. Secondly, comparison of various expressions of the mixing length shows that the Bougeault and Lacarrere (1989) formulation produces the higher amount of subgrid TKE and turbulent mixing. A decreased turbulent dissipation parameter also significantly increases the amount of subgrid TKE. On the contrary, the use of a 3D turbulence scheme appears to have very limited impacts on the turbulent flow at this kilometer-scale horizontal resolution.<br>On a second part of this study, results from ongoing Large Eddy Simulations (LES) will be presented. These simulations aim at representing small-scale features of the turbulent flow. They will be used as a reference for the computation of turbulent fluxes at kilometer-scale resolution using a coarse-graining method, allowing for a comparison with the parameterized fluxes from the turbulence scheme. In particular, the dissipation term of the TKE equation will be examined. These results are expected to give insight on the leading turbulent mechanisms for which the current turbulence parameterization can be improved in stable conditions.</p>

scholarly journals Complex Approach to Conceptual Design of Machine Mechanically Extracting Oil fromJatropha curcasL. Seeds for Biomass-Based Fuel Production

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Ivan Mašín ◽  
Michal Petrů
Keyword(s):  
Jatropha Curcas ◽  
Systematic Approach ◽  
Labour Productivity ◽  
Oil Extraction ◽  
Production Costs ◽  
Small Scale ◽  
Efficient Manner ◽  
Technical Problems ◽  
Complex Approach ◽  
Small Scale Farmers

One of important sources of biomass-based fuel isJatropha curcasL. Great attention is paid to the biofuel produced from the oil extracted from theJatropha curcasL. seeds. A mechanised extraction is the most efficient and feasible method for oil extraction for small-scale farmers but there is a need to extract oil in more efficient manner which would increase the labour productivity, decrease production costs, and increase benefits of small-scale farmers. On the other hand innovators should be aware that further machines development is possible only when applying the systematic approach and design methodology in all stages of engineering design. Systematic approach in this case means that designers and development engineers rigorously apply scientific knowledge, integrate different constraints and user priorities, carefully plan product and activities, and systematically solve technical problems. This paper therefore deals with the complex approach to design specification determining that can bring new innovative concepts to design of mechanical machines for oil extraction. The presented case study as the main part of the paper is focused on new concept of screw of machine mechanically extracting oil fromJatropha curcasL. seeds.

scholarly journals Influence of three artificial light sources on oviposition and half-life of the Black Soldier Fly, Hermetia illucens (Diptera: Stratiomyidae): Improving small-scale indoor rearing

PLoS ONE ◽  
2018 ◽  
Vol 13 (5) ◽  
pp. e0197896 ◽  
Author(s):  
Carina D. Heussler ◽  
Andreas Walter ◽  
Hannes Oberkofler ◽  
Heribert Insam ◽  
Wolfgang Arthofer ◽  
...  
Keyword(s):  
Half Life ◽  
Small Scale ◽  
Artificial Light ◽  
Light Sources ◽  
Black Soldier Fly ◽  
Hermetia Illucens

scholarly journals Opportunities and Scope for Botanical Extracts and Products for the Management of Fall Armyworm (Spodoptera frugiperda) for Smallholders in Africa

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 207
Author(s):  
Naomi B. Rioba ◽  
Philip C. Stevenson
Keyword(s):  
Spodoptera Frugiperda ◽  
Biological Activities ◽  
Fall Armyworm ◽  
Production Costs ◽  
Small Scale ◽  
South American ◽  
Specific Knowledge ◽  
African Context ◽  
Small Scale Farmers ◽  
Short Time

Fall Armyworm (FAW) (Spodoptera frugiperda) is a polyphagous and highly destructive pest of many crops. It was recently introduced into Africa and now represents a serious threat to food security, particularly because of yield losses in maize, which is the staple food for the majority of small-scale farmers in Africa. The pest has also led to increased production costs, and threatens trade because of quarantines imposed on produce from the affected countries. There is limited specific knowledge on its management among smallholders since it is such a new pest in Africa. Some synthetic insecticides have been shown to be effective in controlling FAW, but in addition to the economic, health and environmental challenges of pesticide use insecticide resistance is highly prevalent owing to years of FAW management in the Americas. Therefore, there is a need for the development and use of alternatives for the management of FAW. These include plant-derived pesticides. Here we review the efficacy and potential of 69 plant species, which have been evaluated against FAW, and identify opportunities for use among small-scale maize farmers with a focus on how pesticidal plants might be adopted in Africa for management of FAW. The biological activities were diverse and included insecticidal, insectistatic (causing increased larval duration), larvicidal, reduced growth and acute toxicity (resulting in adverse effects within a short time after exposure). While most of these studies have been conducted on American plant taxa many South American plants are now cosmopolitan weeds so these studies are relevant to the African context.

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