Farmed Tilapia

Project

Sustainable aquaculture in Ghana, manure as input for pond cultures

A number of African countries are dealing with fish supply shortages due to declining fishery catches, a rapidly growing population, and a shortage of foreign exchange to import fish. Because fish is a vital source of animal protein and other micronutrients, a shortage of fish has direct consequences for human health and in particular that of vulnerable groups such as pregnant women and children.

To meet the growing demand for fish, aquaculture is experiencing a rapid development. The Ghanaian government is projecting to increase the fish production from 10,000 MT in 2010 (FAO) to 100,000 MT in 2016. For Dutch companies active in aquaculture these developments provide excellent opportunities


One of the major bottleneck of aquaculture development in Africa is the availability of high quality fish feeds. Less dependence on more expensive protein sources from commercial fish feeds is achieved by an alternative production strategy which uses waste as fertilizer and low quality products, combined with innovative techniques for the production of natural food organisms in ponds to increase fish production.


Goals

The project has two objectives:

  1. To optimize the production of herbivorous/omnivorous fish species in a semi-intensive pond system without (or with minimal use of) commercially available complete feeds. This will be achieved by the application of chicken manure in combination with agricultural residues and innovative techniques to increase the production of natural food organisms in the pond.
  2. To develop and test alternative production strategies at a (semi) practical scale.

Methodology


  1. This will be achieved by the application of chicken manure in combination with agricultural residues and innovative techniques to increase the production of natural food organisms in the pond.
  2. To develop and test alternative production strategies at a (semi) practical scale.

Methodology

For the construction of the bio-economic model data will be collected from literature during desk studies and from the field work in Ghana for additional data. The research will focus on tilapia, possibly in polyculture with African catfish.

The research will focus on tilapia, possibly in polyculture with African catfish.

Production scenario’s (#4) include the:

  1. stimulation of natural food production in ponds with use of chicken manure with low value agriculture by-products;
  2. stimulation of natural food production in ponds with periphyton;
  3. stimulation of natural food production in ponds with bioflocs and;
  4. nursing of tilapia in ponds and grow-out in cages in river.

Results

  • Insights in the technical production potential and economic feasibility of alternative production strategies;
  • Insights in different production models and the bio-economic performance of these systems;
  • A practical business plan working towards the realization of the most appropriate production strategy by entrepreneurs;
  • Increased profitability of participating companies;
  • Economic benefits through cost savings on fish feeds and transport /processing of chicken manure;
  • Job creation opportunity;
  • Knowledge applicable elsewhere in Africa on a commercial scale.


Publicaties


other relevant publications