|Closed system in intensive marine finfish hatcheries: state of the art and future prospects|
Blancheton, J.P.; Covès, D. (1993). Closed system in intensive marine finfish hatcheries: state of the art and future prospects, in: Barnabé, G. et al. (Ed.) Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. EAS Special Publication, 18: pp. 87-93
In: Barnabé, G.; Kestemont, P. (Ed.) (1993). Production, environment and quality: Proceedings of the International Conference Bordeaux Aquaculture '92, Bordeaux, France, March 25-27, 1992. EAS Special Publication, 18. European Aquaculture Society: Gent. 587 pp., more
In: EAS Special Publication. European Aquaculture Society, more
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VLIZ: Proceedings 
|Document type: Conference paper|
|Authors|| || Top |
- Blancheton, J.P.
- Covès, D.
The development of intensive marine fish production techniques requires the knowledge of the rearing parameter optimal level and their control. Moreover the production facilities must be used as long as possible, all year long. Closed systems fulfill these requirements and also contribute to decrease aquaculture impact on the environment. The general use of closed systems throughout the production process, will necessarily lead to the treatment of accumulated catabolites (such as nitrates) in a specific reactor. In the future, all effluent treatment will have to be considered in accordance with environment protection laws. To design efficient recirculating systems, the analytical approach choosen by IFREMER has led us to detine, build models and optimize each part of the treatment process and to suggest the following organization of a closed system: mechanical filtration, uv irradiation, biological filtration, reoxygenation. Many facilities, based on this design, have been developed on a pilot scale, in the MEREA laboratory, but also in real production conditions, in private firms. A summary is presented for broodstock management, incubation, larvae and fingerling rearing phases.