8010

• UCREFRP Catalog Number: 8010
• Author: Montagne, M.
• Title: The Grand Valley Propagation Facilities - 1997 Annual Report.
• USFW Year: 1998.
• USFW - Doc Type: Grand Junction, CO.
• Copyright Material: NO

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1992

In August 1992, approximately 8,000 1991-year-class Colorado squawfish were transferred to
Horsethief These fish had been spawned at Dexter National Fish Hatchery (NFH, New Mexico)
and reared at Bellvue State Fish Hatchery (SFH, Colorado). These Colorado squawfish are first
generation progeny (Pi) from wild squawfish captured in the Colorado River. The wild fish were
returned to the river after spawning in 1992. A total of 150 Colorado squawfish from the 1991
year class are currently being held at Horsethief

1993

In 1993, 13 wild razorback suckers were captured in or near the Grand Valley and placed in
refugia at Horsethief Three of the razorbacks (two females and one male) were captured in
Walter Walker SWAin April and May. Since that time all three of these fish have produced
offspring (Table 2), but as of January 1998 only the male survives. The other 10 razorbacks,
discovered in Etter's Pond (a privately owned pond near Debeque, CO), were transferred to
Horsethiefin April 1993. Subsequent DNA testing proved these fish to be siblings so only three
were used as broodstock (two females and one male). The male has since died, but the females
remain alive and are still used as broodfish.

1994

On April 26, 1994, the three adult razorback suckers from Walker State SW A were used in a
paired mating with one male razorback from Etter Pond. These fish produced four family lots
(Table 2). These four lots, and two family lots of razor backs spawned at Ouray NFH (Utah),
were sent to Bellvue SFH. They were reared at Bellvue until 1995 when the six lots were
transferred to Horsethief Fifty of the fish have survived and are currently being held at
Horsethief In November of 1994, two female and four male razorbacks were transferred from
Wahweap SFH (Utah). Two female and two male razorbacks were transferred from Ouray NFH
to Horsethiefin November of 1994. These wild fish were captured in the Colorado and San Juan
arms of Lake Powell in 1990 and have been used as broodstock since 1992. Five of the
razorbacks transferred in 1994 have survived and are currently held at Horsethief

1995

On April 24, 1995 the razorbacks held at Horsethiefwere spawned in paired matings and 25
family lots of eggs were produced and sent to Valley City NFH (North Dakota). Nineteen of the
lots hatched successfully and were reared at Valley City until October of 1995, when they were
transferred to Wahweap SFH. On May 4, 1995 a wild female razorback sucker was captured at
Walker SW A and placed in refugia at Horsethief This was the last wild razorback to be captured
from the Colorado River above Lake Powell. That female was successfully spawned twice, but
has since died.

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