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Now showing items 11-20 of 21
Comparison of African tilapia partial harvesting systems
Type: Journal Article
Three typical African partial harvesting systems and an unfished control were compared for gross yield. Fish grew undisturbed on an input regime based on that used by Malawian smallholding farmers for 122 days. Then, for ...
African aquaculture: realizing the potential
Type: Journal Article
Despite 40 years of research and development, and hundreds of millions of dollars spent, aquaculture is struggling to realize its high biophysical potential in Africa. Hampered by ineffective institutional arrangements and ...
Survival of Clarias gariepinus fry in earthern ponds: effects of composts and leaks
Type: Journal Article
To inform decisions on improving the yields of African catfish Clarias gariepinus fingerlings in earthen ponds, the hypothesis that composts and leaks were partly responsible for usually low and variable fry survivals was ...
Advanced nursing of Clarias gariepinus (Burchell, 1822) fingerlings in earthen ponds, through recycling of tilapia recruits
Type: Journal Article
In an attempt to improve the stocking size and yield of Clarias gariepinus, small fingerlings (average weight=3 g) of the type usually produced by African hatcheries were stocked together with tilapia (Oreochromis niloticus) ...
Participatory research boosts catfish egg, fry production in Cameroon
Type: Journal Article
The omnivorous African sharptooth catfish is a valuable species suitable for culture by smallholder farmers in Cameroon. A five-year research project that brought farmers together with research interests established simple, ...
Use and exchange of aquatic genetic resources for food and aquaculture: clarias catfish
Type: Journal Article
There are 58 species of Clarias recognized in FishBase (as of January 2009), 33 in Africa and 25 in Asia. Aquaculture of clariids is important with 30 countries reporting a total production of over 300 000 t worth nearly ...
Analysis of aquaculture investments in periurban Yaounde, Cameroon
Type: Journal Article
To better understand the key components of aquaculture production in periurban Africa, the farming systems and profitability of five semi-intensive fish culture investments within 35 km of the centre of Yaoundé, Cameroon ...
Relative Importance of Various Predators in Clarias gariepinus Fry Mortality in Cameroon
Type: Journal Article
To estimate the relative importance of the most common predators of Clarias gariepinus fry, increasing levels of protection were afforded to exclude amphibians, aquatic arthropods and birds. At a stocking density of 10 ...
Intensity and profitability of Clarias nursing systems in periurban Yaoundé, Cameroon
Type: Journal Article
To target development efforts, the technological options for investments in Clarias gariepinus hatchery systems were compared for cost, average weight, number of fingerlings harvested, survival and profitability in periurban ...
The evolution of aquaculture in African rural and economic development
Type: Journal Article
In Africa, aquaculture has developed only recently and so far has made only a small contribution to economic development and food security. We review developments and identify constraints to the expansion of aquaculture ...