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CWT Tag Formats

The decimal coding (etching) allows for either batch or individual identification. Batch codes, identifying a group of animals sharing one or more characteristic, are most commonly used for fisheries management purposes.

Standard CWT have batch coding; the same code is repeated over a specific length of wire. Sequential CWT are designed to identify individuals or small groups; the code advances over a specific length of wire. The use of these sequential tags is somewhat more complex in requiring the saving or "archiving" of a CWT before and after the implanted tag or tags.

NMT produces five formats of CWT.  Download the reading instructions for a complete description of each format.

  • Standard

  • One and a half-length

  • Half-length

  • Sequential

  • Agency-only

Downloads:

  
  

Northwest Marine Technology, Inc.                   (360) 468 - 3375

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