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No Thumbnail AvailableProjectSite selection for aquaculture: Introduction, technical and non-technical considerations in site selection
Establishment of African Regional Aquaculture Centre
1987Also available in:
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No Thumbnail AvailableProjectSoil quality considerations in the selection of sites for aquaculture
Establishment of African Regional Aquaculture Centre
1987Also available in:
No results found.Soil quality is an important factor in fish pond productivity as it controls pond bottom stability, pH and salinity of overlying water and concentrations of plant nutrients required for the growth of phytoplankton, which is the base of food chain of the fish. A satisfactory site for constructing fish ponds is that where the soil is very deep, with low salinity levels and neutral pH, water infiltration is very low, mineralization of organic matter takes place rapidly, nutrients are adsorbed and r eleased slowly over a long period. Moderately heavy textured soils because of their high surface area and surface charge density posses the above characteristics. Too heavier textured soils such as pure clay may not be satisfactory as they have very high adsorptive property and thereby act as a sink for nutrients like phosphorus which may not be easily released to the overlying water. These soils may also give problems of developments of deep cracks when dry (on draining the ponds) thereby allow ing seepage losses of water. In order to have a clear understanding of the various physicochemical and biological processes which are controlled by the soil in the ponds and to make decisions on the suitability of sites for aquaculture as well as effective managements of the soils for increased productivity of the ponds, one needs to have a good background knowledge of the nature and properties of the soil. This chapter presents basic information on soils, their characteristics and their appli cations to aquaculture. The physicochemical characteristics of water as they affect aquaculture. are discussed separately elsewhere. The science of aquaculture has many similarities with that of agriculture though it is of recent development compared to the latter. Many of the ideas in aquaculture are derived from the experiences in agriculture. -
No Thumbnail AvailableProjectSouth China Sea fisheries development and coordinating programme. Report of assistance on selection of site, design, construction and management of the Ban Merbok, Kedah, Malaysia brackishwater aquaculture demonstration project, Malaysia 1980
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No results found.A consultancy was implemented to initiate the brackishwater aquaculture demonstration pilot project at Ban Merbok, Kedah state in Malaysia. The work consisted in selecting site, preparing the design and construction procedure, and setting guidelines for the future operation of the project. There was a question whether to establish the pilot family size small-holder pond demonstration inside or outside a man-made bund in the area. The technical and socio-economic considerations were appraised i n each case and it was determined by the Government Task Force that demonstration outside the bund was more advantageous. The Task Force functioned with the technical advice of this consultancy. To ensure the continuing supply of stocking material for penaeid shrimp and finfish, complementary project consisting of the establishment of a hatchery was also looked into. Prospective sites were surveyed and preliminary selection of the most suitable area was determined. Preliminary guidelines for t he construction and operation of the hatchery were also laid down. Present designation and address:
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