7144

• UCREFRP Catalog Number: 7144
• Author: Inslee, T. D.
• Title: Spawning and Hatching of the Razorback Sucker
• USFW Year: 1982
• USFW - Doc Type: Western Association of Fish & Game Agencies
• Copyright Material: NO

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on May 8, 1978, five miles upstream. Carp were the most common fish
tagged in 1979, but more importantly, 22 Colorado squawfish were marked.

Table 5. Numbers of fish tagged by species and month, Moon Lake Study,
Green River, Utah.

Species A M J J A S Total
Carp 30 29 11 24 37 131
Colorado squawfish 5 7 1 2 3 4 22
Roundtail chub 1 1
Razorback sucker 3 2 5
Bluehead sucker 2 5 12 11 8 38
Flannelmouth sucker 9 5 2 9 26 51
Channel catfish 2 1 4 2 9
Wa 11 eye 2 2 1 2 7
Total 51 50 28 51 78 6* 264

*Tagging equipment failure; unable to tag all adult fish.

Length frequency data for young Colorado squawfish were plotted
to show growth during the study period (Figure 2). The 1978 year class
fish grew from an April length of about 40 mm to a September length of
125 mm. Considerable variation in growth was noted in that fish of
the 1978 age class were 30 mm to 60 mm in April and 100 mm to 150 mm
in September. Young-of-the-year squawfish were first collected on