Troutex ApS

Breeding Design and Registration Services

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In general the characteristic of rainbow trout have heavy variation in the heredity from individual to individual.If you breed down to each individual, it is possible to increase the economical progress in above mentioned, if the breeding programmes are based on families.To identify each induvidual every fish is registered with P.I.T.-Tag (Passive Integrated Transponder) a microprocessor covered with glass and injected in the abdominal cavity of the fish, so that each fish has its own identification number.

The project

The project was initiated in 1993 to carry out the research programme – Prevention of disease, genetic and nutrition in production of rainbow trout ( Oncorhynchus mykiss). The programme was financed by the Danish Government, The Scientific Research-board of Agriculture and Veterinarian, and the Danish Ministry of Fishery.
The first part of the research programme proved a heavy genetic variation between breeding of families of rainbow trout, the figures showed a reduction in production time, lower feed conversion ratio and less nitrogen and phosphorous in the outlet water.
In June 2000 research facilities was build in Hirtshals to continue the research programme of family breeding with a budget of 5,7 mill DKK from 2001-2004. The financial support came from DØA – a funding company founded of the Danish aqua cultural assosiations, Danish Ministry of Food, Agriculture and Fishery.
Due to limited resources and lack of space it was necessary to involve fish farmers to continue the research programme, and the practical part is now taking place at Trehøje Fish farm by Ove Ahlgreen and Ravning Fish farm by Jørgen Jøker Trachsel.

Programme objectives

To identify growth, feed utilization and digestibility.
To find genetic coherence between genetic variance and sensoric test (consumer test).
To identify hatching rate, survival rate, and resistance against disease.

Selection for breeding

All data, such as the weight and length of the fish, feed uptake, feed conversion, growth rate, mortality, processing offal etc. concerning each family and individual will be logged into a database, for further calculation of breeding values. The results will be used in selection of coming generations.

Prediction of meat quality and growth

With genetic analyses, it should be possible to identify and predict the development of several interesting characteristics, But it will take generations to build a useful database, and hopefully find coherence in the enormous volume of information.

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