7606

• UCREFRP Catalog Number: 7606
• Author: Negus, M. T., D. A. Belford and S. E. Colvin.
• Title: Long-term Retention of Fluorescent Pigment Marking of Chinook Salmon.
• USFW Year: 1990.
• USFW - Doc Type: St. Paul, MN.
• Copyright Material: NO

stocks of vigorous adult chinook salmon (mean weight
6.5 kg) in an ultraviolet light box would be difficult.
6) Differential pigment retention due to sex and
stage of maturity should be considered (Evenson and Ewing
1985).
7) Retention of pigment granules >5 yr is untested,
though continuous loss of granules beyond what was seen at
age 4 in chinook salmon would render mark detection
unlikely.
8) This technique lacks permutations for individual
fish identification; the red pigment is reported to be most
readily detectable (Ware 1968). Also, pigment is visible
only under ultraviolet light, so it is undetectable to
anglers.

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