Integrated system: Teatment of fish hatchery effluents by extensive pond culture (France)

Integrated aquaculture systems are interesting to reduce the environmental impacts of intensive aquaculture systems. The principle is an association of extensive cultures using the enriched water effluent and the particulate detritical organic matter as a fertiliser to enhance the productivity in an extensive compartment (Hussenot and Shpigel, 2003).

It could be an interesting way to valorise extensive aquaculture systems as a tool of bioremediation. Some approach applied to coastal ponds was developed in a precedent Innovation EC project by the GENESIS consortium where IFREMER and  CREAA were involved (http://www.ifremer.fr/crema/prog_europeens/Genesis/genesis.htm).

The integrated system (fish-microalgae-shellfish) proposed by IFREMER will be tested in an intensive wetland-based hatchery-nursery of seabream (FMD producing 20 millions of  seabream per year) located on the Atlantic coast of France.  First experiments were started on the site in 2001 and described by Hussenot (2003). 2,5kgN and 0.14 kg P were removed per day corresponding to 37% of N and 14% of P discharged by the fishfarm. In the present project more integrated shellfish and algae species will be used (oyster, shrimp and if possible macroalgae) and two cultural practices will be compared in the objective to enhance the nutrient removal efficiency by the integrated system.

Publications

D59 Integrated system: Treatment of fish hatchery effluents by extensive pond culture

D63 Scientific/Technical communication on Integrated system: Treatment of fish hatchery effluents by extensive pond culture