Barriers to fish movement: Tributaries of the Sperchios river

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Barriers to fish movement: Tributaries of the Sperchios river

The crossing creates a drop of two meters that migrating fish cannot cross. This is a serious pressure on natural fish communities.

October 1, 2015 West slopes of Mount Iti, Spergios river basin.

After the first heavy rains, the trout move and migrate. They face obstacles. Some of them are natural, some are artificial. The rivers upstream of these barriers are broken: if the barriers are artificial, the result is the degradation of the rivers. River without fish

Here we study riverine fish communities in the mountains of the southern tributaries of the Spireos in central Greece; We try to interpret what we see. Sometimes you don't find fish... but in perfectly clean and natural wild waterways... it's because of the obstacles!

The photos below were taken a few days ago when naturalist and photographer Thanassis Skouras joined our group of three. Thanasis volunteered to help us with the electrofishing and also took lots of pictures. Therefore, I am posting it here in remembrance of that wonderful and ordinary day of fish research.

Our HCMR team is doing and learning a lot to compile a list of fish communities and habitats. We listen to the life of the river. What a pleasure to build a knowledge base. I have to say how lucky I am to learn something that will help me better manage systems like rivers. He came back again.















The photos above show 600m elevation down to 300m (some in the Eti National Park area). Obstacles are visible in the background: a crossroads and a hydroelectric power station. Some parts of the creek have fish and some don't (but we found a few salamanders in a nice cool spring). Most of the fish caught here are trout ( Salmo cf. fariodes ) and very few Barbus sperchiensis . Thanks to Thanasis Skouras and my wonderful colleagues Sofia and Giannis for the photos.

Also, for those who are really interested in mountain streams in Iti National Park, check out one of our first trips to the region in November 2012: Ichthyological study of the main mountain streams of Mount Iti.


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