Aquaponics for Improved Food Security in Africa: A Review

Increasing demand on water resources, reduced land water availability, and concerns over food security have spurred the evolution of many innovative and complex food production. An aquaponic system is a productive, innovative, and sustainable fish and vegetable production system that is revolutionizing agriculture in the face of drought, soil fertility losses, and climate change. Aquaponics, as an advanced aquaculture-agriculture system, is expected to improve food security in developing countries. However, as an emerging technology, there is very limited information on the system in Africa. Questions about the ecological and socio-economic sustainability of aquaponics are answered in this comprehensive review. This review considers aquaponics projects in Africa, categorizes the technology by evidences of their effectiveness, fish and plant yields, and juxtaposes the technology within best-use practices to make recommendations that will inform evidence-based policymaking. It also maps the present spatial adoption of the technology in sub-Saharan Africa and highlights the system's contribution to improving food security on the continent. Egypt and South Africa are countries where aquaponics is emerging and being adopted at faster rates and contributing to food security. In West Africa, significantly lower net-discounted benefit-cost ratios were realized when aquaponics systems were constructed using imported materials compared to using locally available materials. Despite aquaponics systems generally having higher start-up costs currently, its potential to be economically viable when undertaken with local materials is very high.

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Maintaining paediatric cardiac services during the COVID-19 pandemic in a developing country in sub-Saharan Africa: guidelines for a “scale up” in the face of a global “scale down”

Cardiology in the Young ◽

10.1017/s1047951120003650 ◽

2020 ◽

Vol 30 (11) ◽

pp. 1588-1594

Author(s):

Ogochukwu J. Sokunbi ◽

Ogadinma Mgbajah ◽

Augustine Olugbemi ◽

Bassey O. Udom ◽

Ariyo Idowu ◽

...

Keyword(s):

Scale Up ◽

Global Scale ◽

International Travel ◽

Sub Saharan Africa ◽

African Continent ◽

Tertiary Centre ◽

The Face ◽

Scale Down ◽

Sub Saharan ◽

International Experts

AbstractThe COVID-19 pandemic is currently ravaging the globe and the African continent is not left out. While the direct effects of the pandemic in regard to morbidity and mortality appear to be more significant in the developed world, the indirect harmful effects on already insufficient healthcare infrastructure on the African continent would in the long term be more detrimental to the populace. Women and children form a significant vulnerable population in underserved areas such as the sub-Saharan region, and expectedly will experience the disadvantages of limited healthcare coverage which is a major fall out of the pandemic. Paediatric cardiac services that are already sparse in various sub-Saharan countries are not left out of this downsizing. Restrictions on international travel for patients out of the continent to seek medical care and for international experts into the continent for regular mission programmes leave few options for children with cardiac defects to get the much-needed care.There is a need for a region-adapted guideline to scale-up services to cater for more children with congenital heart disease (CHD) while providing a safe environment for healthcare workers, patients, and their caregivers. This article outlines measures adapted to maintain paediatric cardiac care in a sub-Saharan tertiary centre in Nigeria during the COVID-19 pandemic and will serve as a guide for other institutions in the region who will inadvertently need to provide these services as the demand increases.

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Is High Whitefly Abundance on Cassava in Sub-Saharan Africa Driven by Biological Traits of a Specific, Cryptic Bemisia tabaci Species?

Insects ◽

10.3390/insects12030260 ◽

2021 ◽

Vol 12 (3) ◽

pp. 260

Author(s):

Habibu Mugerwa ◽

Peter Sseruwagi ◽

John Colvin ◽

Susan Seal

Keyword(s):

Food Security ◽

Bemisia Tabaci ◽

Development Time ◽

Adult Emergence ◽

Sub Saharan Africa ◽

Biological Traits ◽

Population Development ◽

Species Classification ◽

First Instar ◽

Sub Saharan

In East Africa, the prevalent Bemisia tabaci whiteflies on the food security crop cassava are classified as sub-Saharan Africa (SSA) species. Economically damaging cassava whitefly populations were associated with the SSA2 species in the 1990s, but more recently, it has been to SSA1 species. To investigate whether biological traits (number of first instar nymphs, emerged adults, proportion of females in progeny and development time) of the cassava whitefly species are significant drivers of the observed field abundance, our study determined the development of SSA1 sub-group (SG) 1 (5 populations), SG2 (5 populations), SG3 (1 population) and SSA2 (1 population) on cassava and eggplant under laboratory conditions. SSA1-(SG1-SG2) and SSA2 populations’ development traits were similar. Regardless of the host plant, SSA1-SG2 populations had the highest number of first instar nymphs (60.6 ± 3.4) and emerged adults (50.9 ± 3.6), followed by SSA1-SG1 (55.5 ± 3.2 and 44.6 ± 3.3), SSA2 (45.8 ± 5.7 and 32.6 ± 5.1) and the lowest were SSA1-SG3 (34.2 ± 6.1 and 32.0 ± 7.1) populations. SSA1-SG3 population had the shortest egg–adult emergence development time (26.7 days), followed by SSA1-SG1 (29.1 days), SSA1-SG2 (29.6 days) and SSA2 (32.2 days). Regardless of the whitefly population, development time was significantly shorter on eggplant (25.1 ± 0.9 days) than cassava (34.6 ± 1.0 days). These results support that SSA1-(SG1-SG2) and SSA2 B. tabaci can become highly abundant on cassava, with their species classification alone not correlating with observed abundance and prevalence.

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Cassava Processing in Sub-Saharan Africa: the Implications for Expanding Cassava Production

Outlook on Agriculture ◽

10.1177/003072709402300307 ◽

1994 ◽

Vol 23 (3) ◽

pp. 197-205 ◽

Cited By ~ 10

Author(s):

Felix Izu Nweke

Keyword(s):

Food Security ◽

Water Supply ◽

Sub Saharan Africa ◽

Wide Range ◽

Intensive Use ◽

Cassava Production ◽

Sub Saharan ◽

Processing Techniques ◽

Technical Solutions ◽

Poor Soil

Cassava makes an important contribution to improving food security and rural incomes in sub-Saharan Africa, as it is tolerant of drought and poor soil and its cultivation does not require much labour. However, the fresh roots are bulky and perishable and need to be processed before they can be marketed; processing also removes the cyanogens which make many varieties poisonous in their raw form. Cassava roots are turned into granules, flours, pastes and chips, with a wide range of flavours and appearances for different areas and markets. Many different processing techniques are used, some of which make intensive use of fuelwood while others require a plentiful water supply. These requirements, as well as the need for a good transport and marketing infrastructure, limit the expansion of cassava production in sub-Saharan Africa, but technical solutions are being found.

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Turkey’s Sub-imperialism in Sub-Saharan Africa

Review of Radical Political Economics ◽

10.1177/04866134211003995 ◽

2021 ◽

pp. 048661342110039

Author(s):

Gönenç Uysal

Keyword(s):

Foreign Policy ◽

Economic Crisis ◽

Jel Classification ◽

Sub Saharan Africa ◽

Gulf Countries ◽

Political Roles ◽

The Face ◽

Sub Saharan ◽

Military Relations ◽

Emerging Powers

The growing economic and political roles of the so-called emerging powers in sub-Saharan Africa have attracted particular attention following the apparent decline of Western powers in the face of the global economic crisis of 2007–2008. The AKP’s “proactive” foreign policy has manifested Turkey’s burgeoning role in the region. This paper draws upon Marxism to explore the diffusion of Turkish capital and the enhancement of military relations in the region in harmony and in contradistinction with Western and Gulf countries. It discusses the AKP’s proactive foreign policy vis-à-vis sub-Saharan Africa as a particular sociohistorical form of sub-imperialism that is characterized by and reproduces economic and geopolitical rivalries and alliances among Turkey and Western and Gulf countries. JEL Classification: F5, P1, O1

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Climate Smart Agriculture as Final Goal: Use of Improved Cereals Varieties in Cinzana, Mali.

Journal of Agricultural Studies ◽

10.5296/jas.v5i1.10582 ◽

2017 ◽

Vol 5 (1) ◽

pp. 50

Author(s):

Kalifa TRAORE ◽

Daouda SIDIBE ◽

Harouna COULIBALY

Keyword(s):

Food Security ◽

Water Conservation ◽

Crop Production ◽

Heavy Rain ◽

Sub Saharan Africa ◽

Improved Varieties ◽

Farmer Organizations ◽

Conservation Technology ◽

Sub Saharan ◽

Smart Agriculture

Climate variability and change are recognized as the greatest challenge to crop production and food security in sub-Saharan Africa. This work assesses farmers’ perception on the contribution of improved varieties of sorghum and millet in the search for food security in Cinzana rural commune of Mali in the current context of climate change.The methodology was based on focus group surveys with both, the decentralized technical services, administrative and municipal authorities, NGOs, farmer organizations and producers but also farmer exchanges visits on improved varieties tested in farmer’s field.The result shows that climate change is described by the majority of farmers (87%) as decrease in rainfall amount and length of rainy seasons, high increases in temperature and high deforestation and water scarcity. Unpredictability of climate, (80%), drought (70%) and heavy rain (65%) occurrence were identified as major perception of farmers on risks in climate for crop production and soil degradation. After farmers’ study tour, 80% of the participants mentioned a better growth of plants and increase of soil moisture with the use of contour ridges tillage as a water conservation technology. Adapted cycle (55%) and higher yield (37%) of improved varieties were farmer’s main drivers for adoption of improved millet and sorghum varieties.The study revealed that local farmers have substantial knowledge on climate variabilities and risks and also are aware of some adaptation strategies. However, for wide scale adoption of effective strategies, capacity strengthening appeared a prerequisite.

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