Solutions

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100 Solutions found

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Flow-Through and Recirculatory Water Systems for Fish Tanks

  • Bernadette Fregene
  • b.fregene@cgiar.org

A recirculatory aquaculture system is a technology where water is recycled after filtration to remove suspended matter. This method is used for higher density culture of fish, allowing for maximum use of limited land and water. Water movement into and out of the tank maintains peak water quality conditions despite dense stocking rates. As water passes into the tank it …

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Tank and Cage Systems for Fish Culturing

  • Bernadette Fregene
  • b.fregene@cgiar.org

Tanks are enclosures placed on land to culture fish that are suitable for intensive production near urban centers with high market demand. Tank culture is a preferred alternative to ponds if limited amounts of water or land is available and the economics are favorable. Cage culture production involves growing of fish inside floating netted containers that are suspended within larger …

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Hapa Nets for Mass Fingerling Hatchery Production

  • Bernadette Fregene
  • b.fregene@cgiar.org

Inadequate supply of high-grade fingerlings from improved fish breeds is one of the main constraints to the expansion of the aquaculture industry across Sub-Saharan Africa. This situation discourages investments and reduces the viability of aquaculture enterprise. Poor and uneven growth rates, and high fingerling mortality present major limitations in open ponds. Birds, reptiles, amphibians, and even aquatic insects can cause …

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Fast Growing and Hybrid African Catfish

  • Bernadette Fregene
  • b.fregene@cgiar.org

The African catfish is excellent for inland freshwater farming and has large potential to boost local and regional production and improve human nutrition and protein security across Africa. Catfish are native to all Sub-Saharan African countries and are widely consumed. Rearing catfish started fifty years ago in West and Central Africa. They grow fast and are omnivorous (including many low-cost …

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All Male Tilapia Fingerlings with Greater Yield and Uniformity

  • Bernadette Fregene
  • b.fregene@cgiar.org

Tilapia is one of the most important farmed fish and is historically among the first breeds cultivated by humans. The group belongs to the Cichlid species that originated in Africa. Tilapia is easy to farm in different systems ranging from low-tech earthen ponds to intensive high-tech tanks and cages. Some of the limitations in producing tilapia are its small size, …

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Pre-Cooked Beans for Consumer Convenience

  • Robert Fungo
  • r.fungo@cgiar.org

Common bean is a major staple food in eastern and southern Africa, the second-most important source of human dietary protein and the third-most important source of calories. Yet the sale and consumption of whole dried common beans is discouraged by their long cooking time, and high energy and water requirements. Pre-cooking combined with canned or frozen preservation techniques substantially decreases …

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Hermetic Bags for Safe Storage of Beans

  • Boaz Waswa
  • b.waswa@cgiar.org

Large post-harvest losses of bean occurs across Sub-Sahara Africa because of improper storage techniques resulting in pest infestation that threatens the food security and livelihoods of farmers. As a result, farmers may opt to sell their produce immediately after harvest when market prices are at their lowest as a risk avoidance strategy. Grain storage pests such as weevils (bruchids) can …

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Mechanized Threshing Operations

  • Alfred Chengula
  • info@imaratech.co

Threshing refers to the separation of seeds or grain seed from the harvested plant, and this is a tedious operation when performed by hand. Typically, women are assigned this task of hitting piled harvest with sticks until the grain falls loose and, in the case of beans where the whole plant is harvested and dried, it requires about four hours …

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