Use of a gel documentation system to measure feather growth bars

  title={Use of a gel documentation system to measure feather growth bars},
  author={M. Shawkey and M. Beck and G. Hill},
  • M. Shawkey, M. Beck, G. Hill
  • Published 2003
  • Art
  • Abstract Feather growth bar widths have become a standard index of nutritional condition in ornithological research. Traditional techniques of measuring these bars are difficult and slow because the bars are often hard to see. We present a fast and repeatable method of visualizing and measuring growth bars using a gel documentation system from Alpha-Innotech Corporation. This system takes digital photos of objects in a low light chamber. These photos can then be enhanced and measured on a… CONTINUE READING
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