Fischmonitoring
Fishmonitoring
Tagging Techniques: Visible Tags
Optically visible tags...
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| Salmon smolt with VI-Tag | Salmon smolt with Colour Marking (arrow) |
...are widely in use. Advantageous is the low price which makes it possible to tag a large number of fish at low cost.
This technology can yield surprising results occasionally. At River Stepenitz, a tributary to River Elbe, for example a sea trout had been tagged. Later it was caught in the Skagerak north of Hirtshals/Denmark and the anchor tag was reported back to the Stepenitz scientists.
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Anchortags on the tagging pistol at the Stepenitz |
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| VI-Tag on the carrier foil... |
...and a close-up of the injection needle |
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| So called T-bar-anchortag of River Sieg | "set of instruments" to equip fish with T-bars and colour markings. |
T-Bar-Anchortag of River Sieg
Salmon right after having been tagged with a T-bar-anchortag (see arrow)
Known applications - do you know others? If yes, please give notice to: mail[at]wanderfische.eu
