7618

• UCREFRP Catalog Number: 7618
• Author: Rose, K. L. and D. R. Hann.
• Title: Summary of Historic Habitat Modeling on the Yampa River Using the Physical Habitat Simulation System
• USFW Year: 1989.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

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CURVE SET:

16 - Humpback Chub Size 5 (260+ rom)

WHERE DATA COLLECTED: Colorado, Green, Yampa Rivers.

WHERE CURVES APPLY: Upper Colorado,River System occupied by humpback
chub.

WHEN DATA COLLECTED: March - November

WHEN CURVES APPLY: March - November

HOW DATA COLLECTED: Radiotelemetry, electrofishing, nets, angling

PARAMETERS: Depth = total water column depth in feet at point of
collection or triangulation.

Velocity = mean water column velocity in feet/second at
point of collection or triangulation.

Substrate = see Table C-1.

Habitat = see Table C-2.

CONFIDENCE RATINGS: IB" for depth, velocity, substrate, because,
although sample size was adequate, the quality
of the data was restricted by possible gear
limitations from sampling in the deep riverine
regions occupied by the species.

CONSTRAINTS:

1. Apply only to Size 5 - Nonspawning Adults.
2. Use only in known or potential humpback chub habitat.

QUALIFIERS:

1. Taxonomic problems with Gila sp. lend problems to
identification of adult fish afield.

2. Caution is advised in applying curves to times other than
MarCh-November, since all collections are from these months.

3. Data collected in specific humpback chub habitats only, i.e.,
black Rocks, Westwater Canyon, Gray Canyon.

4. Use of "dominant" substrate not advised for future analyses,
since "dominant" and "secondary" substrates should be
considered.
DATA GAPS/NEEDS:

1. Gain ability to reliably identify adult humpback chubs afield.

RAW DATA USED:

See Appendix D

A.1.8