7770

• UCREFRP Catalog Number: 7770
• Author: Trammell, M. A.
• Title: Evaluation of Colorado Squawfish Stocking in Kenney Reservoir, Rangely, Colorado.
• USFW Year: 1991.
• USFW - Doc Type: Colorado State University,
• Copyright Material: NO

1
' 11

' river at RK 122 was accessible and was sampled. Drift nets set in the
channels directly below the spillway were used to assess fish escapement
' from the reservoir.
Telemetry
Telemetry observations of adult squawfish of both hatchery and wild
origin were made in 1990. A total of seven adult squawfish were
'
surgically implanted with both radio and sonic transmitters on May 12.
Use of the two types of tags in each fish facilitated tracking of the
squawfish in both the reservoir and the river due to the relative
' performance of the tags in either environment. Three fish were taken from
broodstock at the Dexter National Fish Hatchery. One died and was
White
th
d f
ll
t
ld fi
h
e
rom
ec
were co
e
s
replaced within two weeks. Three wi
River prior to implantation. All fish received a PIT (Passive Integrated
Transponder) tag.
Surgical procedures followed those of Tyus (1984) and Martinez
(1986). The transmitters were dipped in melted beeswax and allowed to dry
' prior to insertion. The fish were anesthetized in a solution of 200 mg/1
' MS-222 (tricaine methanesulfonate). Following topical treatment with an
antiseptic iodine solution, a 40-50 mm incision was made slightly dorsal
' and anterior to the insertion of the right pelvic fin, through which the
transmitters were slipped into the body cavity. The incision was closed
' with 6-7 individual sutures (3-0 non-absorbable monofilament nylon). The
fish were allowed to recover in fresh water treated 'with Furacin to the
point they could remain upright and swim energetically before release into
' the reservoir.