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  • A rotifer culture using variable feeds supports the coexistence of different rotifer biotypes in batch and semi-continuous cultures. Current methods lead to cultures with very low genetic variability.
FP5

ROTINGEN Report Summary

Project ID: Q5RS-2002-01302
Funded under: FP5-LIFE QUALITY
Country: Belgium

A rotifer culture using variable feeds supports the coexistence of different rotifer biotypes in batch and semi-continuous cultures. Current methods lead to cultures with very low genetic variability.

At present rotifers are cultured on 1 feed type through the whole culture period, even though that feed may consist of a mixture of feed types. This procedure leads to cultures with 1 biotype. In this project a culture method was established using different feeds, algae- and yeast-based. The rotifers were fed both feed types in an alternating way. This feeding regime was tested in batch culture (4 consecutive batches) and in semi-continuous culture (20 days). In the batch culture, this resulted in growth rates similar to feeding only algae, but the genetic diversity of the rotifer mixture remained high in both systems.

The new method can be easily applied in European hatcheries, as no, or very little, changes need to be made on the hardware of the culture system. It will take a mentality shift of the managers.

It is anticipated that higher genetic diversity of the rotifers results in more stable rotifer cultures.

This new method will be published in a scientific journal. The method and the obtained results were presented during the rotifer workshop organised at the end of this project. 55 people of the 128 participators were from the private sector.

Contact

kristof DIERCKENS, (researcher)
Tel.: +32-9-2643754
Fax: +32-9-2644193
E-mail
Record Number: 38214 / Last updated on: 2006-02-28
Information source: e-TIP
Collaboration sought: Further research or development support
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