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Generation of microhaptobenthic biomass in aquaculture systems (Abstract)
Austin, A.; Lucey, WM.P.; Ridley-Thomas, C. (1989). Generation of microhaptobenthic biomass in aquaculture systems (Abstract), in: De Pauw, N. et al. (Ed.) Aquaculture: a biotechnology in progress: volume 1. pp. 615
In: De Pauw, N. et al. (Ed.) (1989). Aquaculture: a biotechnology in progress: volume 1. European Aquaculture Society: Bredene, Belgium. ISBN 90-71625-03-6. 1-592 pp., more

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Document type: Conference paper

Keyword
    Marine

Authors  Top 
  • Austin, A.
  • Lucey, WM.P.
  • Ridley-Thomas, C.

Abstract
    Previous work in lotic systems points to potentially high productivity in microhaptobenthic, (periphyton, biofilm) communities. The latter have been shown to contribute rather directly to the diet of juvenile salmonids (amongst other organisms). Presently biofilms are examined in an experimental stream-system to assess their potential as an input to various trophic systems, especially with regard to aquacultured organisms. Forces affecting community development and maturation and thus their proximate composition (including protein and lipid quality , carbohydrate and mineral levels), are manipulated to achieve optimal biofilm nutritional- quality and quantity. In this study environmental parameters manipulated include light, nutrients, and flow rate, subsequently the potential of treated sewage effluent as a source of nutrients for enhanced growth will be examined; the concomitant de-eutrophication of waste waters has obvious environmental benefits. The feasibility of developing nutritionally optimal biofilm communities, with relatively constant composition, through the use of specific inocula and/or specific environmental conditions is also being examined. Harvesting and processing methodologies are being developed to incorporate biofilm into feed pellets which are tested for nutritional quality and availability in standardised feed trials with juvenile salmonids.

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