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Quantification of alizarin red S uptake in coregonid eggs after mass-marking |
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| Authors: | Jan Baer Cornelius Becke Helga M Bentele Friederike Habedank Alexander Brinker |
| Institution: | 1. Fisheries Research Station Baden-Württemberg, Langenargen, Germany;2. Fisheries Research Station Baden-Württemberg, Langenargen, Germany
Landesamt für Natur, Umwelt und Verbraucherschutz NRW, Heinsberger Str. 53, Kirchhundem, 57399 Germany;3. State Office for Agriculture, Food Safety and Fisheries, Rostock, Germany;4. Fisheries Research Station Baden-Württemberg, Langenargen, Germany University of Constance, Institute for Limnology, Mainaustraße 252, 78464, Konstanz, Germany |
| Abstract: | An easy method to measure the uptake rate of the persistent dye alizarin red S (ARS) during marking of whitefish eggs was established and used to measure the ARS content in three different whitefish species during and at the end of the marking procedure. Those values show that only 6–10% of the ARS in the marking solution will be absorbed by the eggs (0.0061–0.0119 mg per egg). Additional analyses 6, 15 and 36 months after marking showed ARS levels below the response level (<6.9 μg kg–1). |
| Keywords: | C albula C macrophthalmus C wartmanni food security otolith marking residue level stocking |