8159

• UCREFRP Catalog Number: 8159
• Author: Trammell, M. and T. Chart.
• Title: Aspinall Studies
• USFW Year: 1999.
• USFW - Doc Type: Annual Assessment of Colorado Pikeminnow Larval Production in the Colorado River, Utah 1992-1996 \
• Copyright Material: NO

Appendix A
Formulae used to estimate catch per unit effort
Ne = CPE IN #/1000 m3 (Ne estimated number offish/1000 m3)
Ne = N/Volm3 * 1000
Where: N =actual number of pikeminnow collected
Volm3 = A*Dist
A = .14 mZ (where area `A' is the size of the net mouth)
Dist =Counts*Constant/999999
Constant = 26873 (from mechanical flow meter handbook)
Counts =ending-initial count (from mechanical flow meter)
NT =SUM OF (NF,, / Tx )
Nom, = Ne *TS~ * discharge (cfs)
T~ =total sampling time in seconds
Tx =total sampling time in hours
Age -Length formulae
(NT =Estimated total larval production)
(Nm=Estimated daily larval production)
Haynes et al. 1985 A = -76.7105 + 17.4949 L - 1.OSSSL2 + .0221L3
Muth 1990 A =1n (L / 6.2163) / .0375
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