7737

• UCREFRP Catalog Number: 7737
• Author: Burdick, B. D. and R. L. Hamman.
• Title: A Study to Evaluate Several Tagging and Marking Systems for Colorado Squawfish, Razorback Sucker, and Bonytail.
• USFW Year: 1993.
• USFW - Doc Type: Grand Junction, CO.
• Copyright Material: NO

(Appendix; Table 9).
V. ~. Tag. At day 195, no V. I. tags could be detected in razorback sucker
from either the pond or raceway. During the entire study, only one tag was
detected and readable (day 343) (Appendix; Table 9). This tag might be useful
for larger razorback sucker (e. g., 150 mm) where adipose tissue is thicker to
implant and retain this tag like for squawfish. Additional species-specific
testing is needed before this tag can be practically used for marking larger
razorback sucker.
Carlin Dan ler Tag. The performance of this tag varied greatly between
fish held in the pond and raceway. Tag verification was 73X and 72X for pond and
raceway fish, respectively on day 195 (Appendix; Table 9). However, for fish
held in the raceway, tag verification declined to 4X on day 343 and OX on day 511
(Appendix; Table 9)(Figure 4). Tag verification remained relatively constant for
razorback sucker held in the pond throughout the study; on day 195 it was 73X;
on day 511 it was 67X (Appendix; Table 9).
Acr lic Dye. Determining the performance of this chemical dye was
difficult because the primary mark and secondary mark (lower caudal fin removal)
were both undetectable on day 343 on razorback sucker. Red dye was detected only
on day 195 and was verified on only 17X and 4X of pond and raceway fish,
respectively (Appendix; Table 9). Black dye was never verified on razorback
sucker during the entire 511-day period.
Bonytail
PIT Tag: Dorsal Musculature. Tag verification and survival were low for
fish held in both the raceway and pond. At day 195 tag verification was only 33%
and 38% for pond and raceway fish, respectively (Appendix; Table 10). Though tag
verification was 75% for pond fish at days 343 and 511, survival was only 13%.
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