It’s a great journey that is being prepared for these fry from the Mouleydier fish farm. An avant-garde policy to support the numbers of local brown trout has been in place for more than 25 years at the Mouleydier salmon farm. Supporting the numbers of brown trout is one of the missions of the Dordogne Federation for fishing and the protection of the aquatic environment was necessary following the decline of this emblematic species in the 1980s.
Assisted reproduction, incubation and then the resorption stage which corresponds to the first stage of fry, with a vitelline pocket (food reserve). It then takes about thirty days for them to be able to swim and be able to feed themselves. They can then be discharged into small streams.
– Marie Dominique Private
Alois Marcelaud, technician at the Mouleydier fish farm:
These trout will be gently fished with a landing net, put in basins to then be packaged in the bags with water and oxygen.
– Marie-Dominique PRIVE
How trout are shipped to streams
Various rules must be respected so that these trouts travel in good conditions.
– Take a large bag and fill it with about 1/3 of clean water from the trout trough.
– Dump the trouts into the bag which should contain about 2/3 of air. Technicians use an air compressor or an oxygen cylinder to keep the fry in an oxygen-enriched environment during transport.
– Place the bag on a flat surface at a comfortable height and put pressure on the top of the bag with your hand, squeezing it so as to block the air.
– Tie a knot and/or close the bag with a tight elastic or cord.
– Marie-Dominique PRIVE
?Listen to Alois Marcelaud explain these different stages