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Farming system developments without medication for disease control in the species symphysodon sp.: New broodstock lines

Evaluate the produced ornamental fish in the industry and develop new genetic lines of symphysodon sp. (Discus). Spain will carry out evaluations and czech republic will test their discus lines on a large scale.

VASA will implement technical measures and zootechnical procedures to reduce disease incidences, instead of using chemical measures, and will improve natural fish resistance through genetic selection. A Czech partner, of recognised international prestige, will develop new lines of breeders from selected genetic material. The partner will receive positive feedback from the Spanish farm that will help to increase genetic improvements generation by generation. The UNIVERSITY OF VALENCIA, through the Faculty of Biology and the POLYTECHNIC UNIVERSITY, and the UNIVERSITY AUTONOMA OF BARCELONA, will collaborate in the development of the project. They will work on controlling the most common diseases of discus, the analysis of resistance and the development of systems for controlling breeders and genetic selection programmes. The election of the broodstock is of vital importance for a successful project. There are two main factors: the establishment of a quarantine system and the selection of suitable lines of breeders. Both technical aspects will be the objectives in the present project. VASA in collaboration with the POLYTECHNIC UNIVERSITY will develop a rigorous genetic program. Starting from a selected broodstock, and crossing with wild fish, it will provide greater integrity to its own lines and will reduce the influence of the problems derived from inbreeding. These problems come from efforts made to consolidate marketable morphological characteristics in the animals. Usually, at the cost of weakening the fish by crossing between parents and the progeny. The work plan will allow, in collaboration with the Faculty of Biology of the UNIVERSITY OF VALENCIA and the UNIVERSITY AUTONOMA OF BARCELONA, for identifying and preventing different diseases that affect the discus, and verifying the influence of the measures adopted in the farm to control them as well as the improvements with new lines. VASA staff will focus their efforts on the design of the set up. At the present time, these ornamental fish are bred in independent aquariums with low technological filtration systems poorly designed from the sanitary point of view. They are going to develop filtration and disinfection systems as well as production techniques that allow for having alternatives to the more traditional purely chemical measures of disease control. The reproduction will take place in aquariums of 150 litres to allow for good control of the reproductive pairs, to later pass the fingerlings on to a pre-growing system. They will then move to a growing system in big tanks (5,000 litres) until they reach commercial size. After a selection, they will go to a presale system in aquariums of 300 litres. The entire productive process will have to incorporate a series of accessory systems that guarantee the best water quality of the water through a complex filtration and disinfection system. They will include solid separators, a pumping station, biofilters, micro filtration, ultraviolet disinfection and protein skimming. Automatic control measures will be implemented. pH, temperature and oxygen will be continuously monitored and controlled. Keywords: ornamental fish, genetic lines, symphysodon sp.
Acronym: 
EURDISKUS-INNOFISH
Project ID: 
3 744
Start date: 
01-08-2005
Project Duration: 
29months
Project costs: 
860 000.00€
Technological Area: 
Fish / Fisheries / Fishing Technology
Market Area: 
Other

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