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HAVKYST-Havet og kysten

Exploitation of zooplankton as bio-resource for fish feed and industrial raw material - A complete value chain evalution.

Tildelt: kr 21,3 mill.

There is a growing demand for marine bio-resources, and the salmon industry is already preparing for temporary limitations in resources for fish feed in the coming decade. Significantly higher quantities of bio-resources are available only if some harvest ing is done at grazer or plants levels. This Strategic Programme addresses possibilities, constraints and consequences of large scale harvesting of herbivore/omnivore zooplanton from a value chain perspective, including biological, technological, and soci al aspects. The groups focused are herbivore copepods and krill species. The research strategy is to put the main efforts into the most critical questions or constraints identified in the value chain for sustainable exploitation of zooplankton resources. Some key questions addressed are: Are densities of berbivore copepods and krill patchy enough in time and space to allow harvesting, and where are such patches found? How will zooplankton-harvesting affect the food availability of important commercial planktivore fish stocks and how will it interact with the fisheries? Are the energy requirements for sustainable harvesting acceptable, and how should the harvesting gear be designed? How is saltwater efficiently removed and how can the harvested resource be conserved? Can crude zooplanktonbiomass, containing high levels of wax esters and chitin, be used as a bulk source for fish feed without removing chitin? How can conserved zooplankton be further refined, i.e. how to separate pro tein, lipid, chitin, pigments and more? How will a "new" r esource that most likely is a available through several months effect social conditions of fishery communities and the fishing fleet?


HAVKYST-Havet og kysten

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