Marking of juvenile whitefish Coregonus lavaretus (L.) with tetracycline antibiotics

Tetracycline (TC), when consumed along with zooplankton by the young-of-the-year whitefish, is deposited in the skeleton as calcium-tetracycline compounds, which-in the UV light-form yellow-gold fluorophores. The fluorescent mark is particularly distinct in vertebrae and otoliths, remaining in those skeletal elements for 24 months and presumably longer. An attempt to utilise artificial feed, based on freeze-dried krill substituting live zooplankton used so far, as a TC carrier was made.

Abstract licence: CC BY

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