8036

• UCREFRP Catalog Number: 8036
• Author: Haynes, C. M., R. T. Muth and G. T. Skiba.
• Title: Identification of Habitat Requirements and Limiting Factors for Colorado Squawfish and Humpback Chubs ‎(July 1 1982 to June 30 1983)‎.
• USFW Year: 1983.
• USFW - Doc Type: \
• Copyright Material: NO

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State of COLORADO
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Project No. N-2-R-1 (SE-3) Identification of Habitat Requirements
Work Plan No. 2 and Limiting Factors for Colorado
Job No. 1 Squawfish and Humpback Chubs
Period Covered : ~;
Personnel: Charles M.' and Gary T. Skiba, Colorado Division of
Wildlife; C al rance A. Carlson and Robert T. Muth, Colorado
State University.
ABSTRACT
A total of 694 seine and ichthyoplankton samples was collected in both the
Colorado River and Yampa River study areas. A total of 16 young-of-year
(YOY) Colorado Squawfish (Ptychochielus lucius) were collected in the
Colorado study area while 20 YOY squawfish were collected in the Yampa
River study area. Estimated spawning dates were 10 July - 15 August and
6 - 28 July for the Colorado and Yampa River sites, respectively. During
1979-82, spawning was, with 1 exception, closely correlated with decreasing
flows and water temperatures of 22 C. Activities in 1983 will include
increased emphasis on ichthyoplankton sampling in the Yampa River study
area. A tentative 1983 field schedule is presented.