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Marking otoliths of brown trout ( S almo trutta L .) embryos with alizarin red S
Author(s) -
Unfer G.,
Pinter K.
Publication year - 2013
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.12100
Subject(s) - salmo , biology , brown trout , stocking , fishery , alizarin red , trout , zoology , fish <actinopterygii> , genetics , staining
Summary In this study a time‐ and cost effective method for marking early life stages of brown trout ( Salmo trutta L.) with alizarin red S ( ARS ) is presented. The main intention was the development of a protocol to mark embryos. When stocking eyed‐eggs, later recognition depends on an adequate tagging method featuring reasonable expenditures, low mortality and high marking success. Best results were obtained using ARS concentrations of 500 mg/l. Consistently clearly visible marks could be detected under a fluorescence‐stereomicroscope equipped with a dsRed filter, without processing the otoliths.