THE MODREJ HATCHERY
The hatchery gets its water from spring Zapolje at Vodivček with a drinking-water quality and a stable temperature of 10 to 11°C. The hatchery uses up to 7 litres of water per second.
There are 64m2 of breeding surfaces in the hatchery for 6-month fingerlings, and 77m2 of surfaces for storing marble trout for breeding and raising one-year-old fingerlings.
The hatchery capacities currently allow hatching of up to 500,000 fry and raising of 200,000 6-month marble trout fingerlings yearly, as well as 30,000 one-year-old grayling fingerlings. The same numbers of trout fingerlings are also bred each year, while we’ve managed to breed up to 25,000 grayling fingerlings in a year.
Approximately half of the trout fingerlings are introduced into breeding streams, while the other half is kept for one-year breeding on the Tolminka and partially at the hatchery.
FISH FARM TOLMINKA 1 (ZALOG)
It is located by the Tolminka on the outskirts of Tolmin. Together with the construction of the fish farm, the small hydroelectric plant of SENG Nova Gorica was also renovated. Both facilities function together; the water from the Tolminka is used first for fish farming and then to produce electricity.
The Tolminka is a torrential river, which is why we have built a number of water purification stations to clear leaves and other debris from the water to be able to use it in the fish farm.
The temperature of the Tolminka varies between 5 and 13°C. At normal operational capacity, 150 litres of water per second run through the fish farm. The water is cleaned in our own treatment plant.
The hatchery capacities currently allow hatching of up to 1,000,000 fry and raising of 200,000 6-month marble trout fingerlings per year, as well as hatching of up to 1,000,000 of grayling fry and raising of 70,000 6-month grayling fingerlings.
The fish farm has a total of 19 pools (230m2) for raising all generations of marble trout and grayling. There are also two canals, measuring 80 m in length and 3.5 to 4 m in width, for raising marble trout for breeding. Three pools are designated for raising of 2- and 3-year-old grayling.
Due to marble trout’s special requirements, the technology needed to breed it is different from that used to breed other species of trout. This is also the reason for the unusual appearance of the fish farm, as the pools and canals are covered.