Basic approach to mariculture problems and development strategies
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The paper discusses the environmental conditions in the open marine and inland brackishwater areas and the type of structures that can be constructed in both areas for mariculture purposes. For the open marine environment cages are suitable but for cage culture, both cheap materials for constructing cages and cheap fish feed have to be developed. For the inland brackishwater areas earth ponds are recommended. The tidal range for earth ponds is quite favourable and soil conditions in Gongoni area is suitable. In developing countries in the far east, herbivores and prawns are popular for culturing in brackishwater ponds and these are recommended for culture in Kenyan waters in the inland brackishwater areas. Majority of the culture activities in the developing countries in the far east, concentrate on extensive practice without supplementary feed. It is recommended that initially extensive practice be adapted and once adequate manpower has been trained and culture practices perfected t hen move into semi intensive systems with fertilizers and then into fully intensive system, by when cheap fish feed can be developed. Details of the pilot project at present underway to test the feasibility of brackishwater fish culture including the biological survey for fish and prawn seed is given. The indications are that mariculture would be profitable specially culturing prawns.