7743

• UCREFRP Catalog Number: 7743
• Author: Miller, A. S. and W. A. Hubert.
• Title: Compendium of Existing Knowledge for Use in Making Habitat Management Recommendations for the Upper Colorado River Basin.
• USFW Year: 1990.
• USFW - Doc Type: \
• Copyright Material: NO

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Table 3. Sensitive areas for rare and endangered Colorado River fishes in the Yampa River, with notes on potential
limiting factors (From Tyus and Karp 1989).
Life history Locations Season Potential limiting factors
stage
Colorado squawfish
Adult 0-140 All year Spring peak flows; overbank flooding;
concentration 51-124 Aug-May seepages in spawning reaches; number
migration 0-140 May-Aug of ripe females; angling or other
spawn 4- 32 Jun-Aug incidental takes; siltation of
Larvae 0- 31 Jul-Aug spawning substrate; competition and
Juvenile. 0-140 All year predation with non-native fishes; food
availability; stream blockage; low
flows late summer, fall and winter;
stability of winter flows
Humpback chub
Adult 0-56 All year Spring peak flows; availability of
concentration 4-40 All year shoreline eddy habitat, and deep canyon
spawn 12-40 May-Jul habitat; competition and predation by
Larvae 0-40 May-Jul non-native fishes
Juvenile 0-56 All year
0
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