7369

• UCREFRP Catalog Number: 7369
• Author: Marsh, P. C. and W. L. Minckley.
• Title: Radiotagging Razorback Suckers
• USFW Year: 1989.
• USFW - Doc Type: Gila River, Arizona 1988-1989.
• Copyright Material: NO

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Located 0.8 km below release site 1800 hr 24 May 1988 in
sandy run; w = 5 m, z = 0.3 m, v = 0.20 m/sec, substrate
sand.
Located 3.5 km above release site 16 June 1988; sandy run, w
= 7 m, z = 0.4 m, v 0.20 m/sec, substrate sand; suspected
loose transmitter Cnot recovered).
Transmitter only recovered 3.5 km above release site 23 June,
from sand bar ca. 30 m downstream from pool' occupied by 25
to 30 adult channel catfish, many of which exhibited scars
.possibly inflicted by .talons of predatoryraptors;
transmitter casing marred by apparent bite marks; fish
1[kely kii,ied by predator.
No. 716 Dexter male.
Transmitter functional and fish alive 24 May 1988.
Located 0.3 km below release site 1800 hr 24 May 1988 in
mid-channel- of sandy run, w = 15 m, z = 0.25 m, v = 0.20
m/sec, sand substrate.
Located 20.0 km above release site 15 June, 1988; swimming
with a school of carp throughout a 150 m-long reach; area
replete with undercut banks. and lateral eddy-pool habitats
associated with snag cover; average stream w = 4 m, z = 0.1
to 0.4 m, v = 0.05 to 0.25 m/sec, substrate predominately
sand.
Located 18.1 km above release site 23 June 1988; fish active
and apparently healthy; schooling near/with carp and
channel catfish In eddying pool ad~acent to
main channel; abundant underwater structure afforded by
coarse organic debris and roots; poo l dimensions 4 x 15 m,
z = O.S m, v = 0.05 m/sec, substrate sand.
No subsequent contact.
No. 718 Dexter male.
Transmitter from fish no. 701 (implanted and released 25 May.
1988).
Transmitter functional and fish alive 25 May 1988.
Transmitter plus pectoral fin recovered 9.6 km downstream
from release site 01 June 1988, from downstream margin of
sandy/gravel bar at contluence of Gila and San Francisco
rivers; cause of death unknown, possibly predator mediated.