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Limitation by dietary means of environmental pollution from farming of salmonids in cages. (COMPLETED 10/92) - AE0510

Description
Summary objectives:- Investigate methods of optimising the digestibility of certain materials (mainly complex carbohydrates and some proteins) in fish diets which result in a decrease in the physical pollution in farm effluents arising from undigested material. Key customer purpose:- Reduce the chemical and physical effects of fish farm effluents on the aquatic environment in accordance with MAFF's responsibilities under the Acts. Enable MAFF policy for aquaculture to be developed in the light of research findings.
Objective
Intensive fish farming leads to chemical and physical pollution of the Aquatic environment. Effluents from fish farms contain uneaten food, undigested food voided in the faeces and metabolic end products such as amonia. We propose to increase the digestibility of certain materials (mainly complex carbohydrates and some proteins) in fish diet , leading to increases in efficiency of utilisation of diets and hence significant decreases in the levels of undigested material in the faeces. Hence problems due to solid materials in the farm effluents will be reduced.(ii) To prepare diets containing predigested material. Compare with control diets for water stability. Feed diets to fish, collect and analyse faeces and water pollution.
Time-Scale and Cost
From: 1989

To: 1992

Cost: £154,675
Contractor / Funded Organisations
University - Aberdeen
Keywords
              
Fields of Study
Environmental Protection - Marine