Validation of scale-age determination in European grayling Thymallus thymallus using tag-recapture analysis.

  title={Validation of scale-age determination in European grayling Thymallus thymallus using tag-recapture analysis.},
  author={Petra Hork{\'a} and Anton T. Ibbotson and John I. Jones and Richard J. Cove and Lauren J. Scott},
  journal={Journal of fish biology},
  volume={77 1},
To validate age determination from scales in European grayling Thymallus thymallus, the scale-read age of fish was compared with the true age obtained by tag-recapture analysis. A total of 3997 individuals were tagged with visible implant tags and passive integrated transponder (PIT) tags in the River Wylye, south-west England during 1999-2007. Annual repeat surveys were undertaken and collected scales read without prior knowledge of tag-recapture age. Accuracy of fish ageing by scales was… CONTINUE READING

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