7402

• UCREFRP Catalog Number: 7402
• Author: Nesler, T. P.
• Title: Aquatic Nongame Research, Endangered Fishes Investigations.
• USFW Year: 1989.
• USFW - Doc Type: Fort Collins, Colorado.
• Copyright Material: NO

Table 5. Radio-tracking observation dat.!!.for Yampa River northern pike,
1986-l988. Tag number refers to combination of F10y tag number
and radio frequency (continued).

Date of River mile Habitat
observation location typea

Date of River mile
observation location

Habitat
type

Tag No. 21. 210 Tag No. 23.070
09/11/87 53.4 MCPO 10/22/87 81.1 MCEM
09/25/87 53.4 MCED 11/03/87 81.1 MCBA
10/06/87 53.4 MCRU 11/17/87 80.8 MCRU
10/26/87 52.8 MCRU 11/18/87 81.1 MCRU
11/06/87 53.4 MCPO 01/28/88 80.6 MeED
11/18/87 53.4 Mepo 03/15/88 80.7 MCED
01/27/87 52.7 MCRU 04/05/88 88.6 MCPO
03/16/88 52.9 MCSH
04/21/87 51.4 SCBA Tag No. 24.200
10/23/87 104.3 MCED
Ta~ No. 22.230 04/06/88 96.2 XXXX
09/11/87 53.3 MCPO
09/25/87 53.2 MCPO
10/06/87 53.2 MCPO
10/26/87 52.8 MCSH
11/06/87 53.1 MCPO
11/18/87 52.7 MCED
01/27/88 53.0.. MCSH
03/16/88 52.8 MeSH
03/30/88 53.2 MCED
04/08/88 52.8 MCSH
04/21/88 51.4 SCSH
05/05/88 .~9.3 MCED
05/05/88 51.4 SCBA

aBA=backwater; ED=eddy; EM=embayment; MC=main channel; PO=poo1; RU=run;
SC=side channel; SH=shore1ine; TS=tributary stream; XX=no data

Joint radio tracking of northern pike and Colorado squawfish never
revealed tagged individuals of the two species in close proximity, though it
was apparent they shared the same river segments, and both moved actively
within that river segment. At Lilly Park, three Colorado squawfish and one
northern pike were captured by angling from the same pool/eddy interface, and

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