Aquaculture research and development in rural Africa: summary report

A summary report on the ICLARM-GTZ/Malawi Fisheries Department/University of Malawi International Conference in Zomba, Malawi, on 2-6 April 1990. Contains abstracts of the papers, which attempt to identify the reasons why the progress of aquaculture in Africa has been slow. With Malawi as a case study, fresh approaches to aquaculture development are presented.Aquaculture development, Small scale aquaculture, Sociological aspects, Aquaculture systems, Africa, Malawi,

Reservoir fisheries and aquaculture development for resettlement in Indonesia

When Indonesia's state electric company constructed two dams along Citarum River to boost its hydroelectric reserves, two new reservoirs were created, agricultural and settled lands were lost, and thousands of families were displaced. This book gives the results of research conducted to help resettle the displaced families and help provide alternative livelihood sources, through aquaculture and fisheries technologies. It is a success story in itself.Reservoir fisheries, Aquaculture development, Indonesia,

Small water bodies for sustainable fisheries production

A brief account is given of some of the discussions presented at a workshop regarding reservoir fisheries in Asia held in Hangzhou, China in Oct 1990. The presentations covered the range of reservoir fisheries management options, from basic limnological research and capture fisheries to intensive cage culture. Particular reference is made to the situation in China, describing current techniques used for stocking and developing reservoir fisheries

History, status and future of common carp (Cyprinus carpio L.) as an exotic species in Malawi: summary report of the workshop

Abstracts of and discussions about six papers on different aspects of carp introductions; working group reports and a "workshop verdict on common carp".Introduced species, Carp culture, Malawi, Cyprinus carpio

Effect of membrane character and solution chemistry on microfiltration performance

To help understand and predict the role of natural organic matter (NOM) in the fouling of low-pressure membranes, experiments were carried out with an apparatus that incorporates automatic backwashing and long filtration runs. Three hollow fibre membranes of varying character were included in the study, and the filtration of two different surface waters was compared. The hydrophilic membrane had greater flux recovery after backwashing than the hydrophobic membranes, but the efficiency of backwashing decreased at extended filtration times. NOM concentration of these waters (7.9 and 9.1 mg/L) had little effect on the flux of the membranes at extended filtration times, as backwashing of the membrane restored the flux to similar values regardless of the NOM concentration. The solution pH also had little effect at extended filtration times. The backwashing efficiency of the hydrophilic membrane was dramatically different for the two waters, and the presence of colloid NOM alone could not explain these differences. It is proposed that colloidal NOM forms a filter cake on the surface of the membranes and that small molecular weight organics that have an adsorption peak at 220 nm but not 254 nm were responsible for “gluing” the colloids to the membrane surface. Alum coagulation improved membrane performance in all instances, and this was suggested to be because coagulation reduced the concentration of “glue” that holds the organic colloids to the membrane surface

A small-scale hatchery for common carp

Gives comprehensive and well-illustrated techniques in comics format for establishing and maintaining an inexpensive hatchery for common carp, based on the techniques adopted in the common carp culture in Indonesia.Fish culture, Hatcheries, Extension material Cyprinidae

Growing fish in pen systems

Describes and fully illustrates in comics format the techniques for growing fish in pen systems, adapted from the techniques developed for two important reservoirs in Indonesia.Fish culture, Cage culture, Extension material

Culture of common carp in floating net cages

An illustrated manual in comics format on how to culture the common carp in floating cages. The techniques described were actually developed in the common carp culture in Bandung, Indonesia, and can be easily adapted to other sites.Carp culture, Cage culture, Floating cages, Extension material