A part of the experimental fish were supplied by the Angling Association of Tolmin, the other part was collected from the natural habitat (a genetically pure population) of this species.
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| marble trout selection at the fish farm of the Angling Association |
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| marble trout |
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| fish waiting for sampling |
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| during anesthesia (top: marble trout, bottom: hybrid trout from the Rižana river) |
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| sperm collection for cryopreservation experiments |
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| egg collection for fertilisation tests |
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| our team at work |
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| on the way to Huda Grapa, the natural habitat of a pure Marble trout population |
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| searching for fish below a waterfall |
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| Gergő climbing up |
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| Dušan climbing up |
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| still collecting fish (from left: Elvis, Dušan, Ákos) |
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| We caught 8 male marbles, let's start stripping the sperm! |
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| anasthesia in the field |
 sperm stripping |
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| these fish are tagged with ID numbers, all of these individuals are investigated for their life history and genetics by our collegues from the Biological Station Tour de Valat in France and the University of Ljubljana |
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| Gergő was releasing the fish after stripping |
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| Dušan and Ákos during sperm collection |
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| samples stored in a box, waiting for cryopreservation |
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| cryopreservation in the field (Gergő and Ákos pouring liquid nitrogen onto frozen samples) |
We had the opportunity to visit the new trout farm in Tolmin, which has just opened in the summer of 2015.
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| tank full of trouts |
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| the main building has "scales" and the fish tanks have the shape of a fish body |
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| the farm is equipped with a modern processing system, here Dusan is showing the smoking chamber |
And last but not least, a video about stripping the sperm of Marble Trout at Huda Grapa:
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