WSP10452

• File Number: 8240.200.21
• Description: UCRBRIP Hatchery Facilities
• State: CO
• Basin: Colorado Mainstem
• Date: 1/1/1983
• Author: US Fish & Wildlife S
• Title: Colorado River Endangered Fish Hatchery Feasibility Study
• Water Supply Pro - Doc Type: Publication

, Goal I. Maintain current status of Colorado squawfish in Upper
Basin.

Task 6.
Task 9.
Task 10.
Task i 2.
Task 13.
Task 14.

Fish passage studies-~20,OOO fry-adults/yr (1985-88)
Turbidity studies--20,OOO young-of-year (yoy)/yr (1984-87)
Imprinting and homing studies--l to 3 million fry (1985-88)
Bioassays--20,OOO yoy/yr (1985-1986)
Competition studies--100,OOO yoy/yr (1985-1989)
Temperature and salinity effects--20,OOO yoy/yr (1983-1984)

Goal II. Maintain current status of humpback chub in Black Rocks and
Westwater Canyon.

Task 6. Gila spp. hybridization--1000 juveniles juv/yr (1983-84)
Task 7. Competitions studies-~20,OOO yoy/yr (1985-89)
Task 9. Salinity studies--20,OOO fry--yoy/yr (1983-84)
Task 11. Bioassays--20,OOO yoy/yr (1983-84)

Goal III. Maintain or reestablish bony tail chub in the Upper Basin.

Task 3.
Task 4.
Task 5.
Task 6.
Task 9.
Task 11.

Habitat requirements-~20,OOO fry--yoy/yr (1984-86)
Taxonomy studies--1000 juv/yr (1984)
Hybridization studies~-lOOO juv/yr (1985)
Identification studies--1000 juv/yr (1983)
Stocking and monitoring--125,OOO yoy/yr (1990-94)
Bioassays--20,OOO fry~-juv/yr (1983-84)

Goal IV. Increase population and range of Colorado squawfish in Upper
Basin.

Task. 1. Backwater studies--100,OOO yoy/yr (1983-86)
Task 4. Stocking--250,OOO yoy/yr (1988-96)

Goal V. Secure and establish humpback chub population in Green River.

Task 2. Taxonomic/cytogenetic study--1000 juv/yr (1984)
Task 5. Stocking and monitoring--125,OOO yoy/yr (1988-92)

Goal VI. Publicize Colorado River endangered fishes.

Task 5. Colorado squawfish sport fishery--100,OOO juv/yr
(1990-96)

Table 2 gives an overview of CP fish production needed from 1983 through
1996. Except for fry production, 1985 through 1988, fingerlings 2-3 inches
in length make up all the anticipated fish hatchery production, which ranges from
182,000 fingerlings in 19?3 to 500,000 in 1990 to 1992. Most of this
production will be Colorado squawfish (50% or 250,000 yoy/yr). Humpback chub
produced in 1988-92 will comprise about 25% or 125,000 yoy/yr, which is close
to the 140,OOO/yr called for irr the Humpback Recovery Plan. An equal
number of bony tail chub (125,000 yoy/yr) will be needed in 1990 through
1994, according to the CPo This is also close to the 100,000 called for
ln the new Bony tail Recovery Plan.

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