9498

• UCREFRP Catalog Number: 9498
• Author: Nesler, T. P.
• Title: Stocking Plan for Endangered Coloraod River Fish Species.
• USFW Year: 2001.
• USFW - Doc Type: Denver.
• Copyright Material: NO

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Table 2.

Survivorship curves used for Colorado River endangered fishes with respect to achieving desired multi-age group
b dan b' f fi h d It

a un ce 0 )Jec Ives or eac specIes as a u s.
Age 1 RAZORBACK C BONYTAIL , COLORADO I
SUCKER PlKEMINNOW
Nos. of fish Survival rate Nos. of fish Survival rate Nos. of fish Survival rate
2 16,440 0.5 12,000 0.3 -- --
3 8,220 0.6 3,600 0.5 2,680 0.5
4 4,930 0.7 2,831~ 0.6 1,340 0.6
5 3J4501 0.7 1,7(J1~ 0.7 800 0.7
6 2,4001 0.7 1,1902 -- 560 0.8
7 1,6901 -- -- -- 4503 0.85
8 -- -- -- -- 3803 0.85
9 -- -- -- -- 32~ --

ISum of age groups 5-7 = 7,540 for razorback sucker (=re',covery goal of 5,800 + 30% buffer).
2Sum of age groups 4-6 = 5,720 for bonytail (=recovery goal of 4,400 + 40 % buffer at Age 4 and 30% at Ages 5 and 6).
3Sum of age groups 7-9 = 1,150 for Colorado pikeminnow (=recovery goal of 1,000 + 15% buffer).

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