7327

• UCREFRP Catalog Number: 7327
• Author: Johnson, J. E.
• Title: Status of Endangered and Threatened Fish Species in Colorado.
• USFW Year: 1976.
• USFW - Doc Type: T/N 280,
• Copyright Material: NO

3. Present Distribution (Fig. VII) - Once common in its range,
the bonytail is presently known to exist only in the Green
and Yampa rivers, Colorado and Utah, and in very small
numbers below several of the lower, mainstream Colorado
River dams. Several reports of bonytails from the White,
Colorado and Gunnison rivers have not been confirmed,
although thorough searches were made. Those existing popu-
lations seem to be rapidly declining, and little indication
of successful reproduction has been observed since 1970.
4. Existing Management Plans - No known plans. The taxonomic
confusion caused by hybridization has slowed down possible
management plans. The extensive hybridization itself in-
dicates the species is in trouble.
5. BLM Interest - One of the few known populations presently
is found in the Yampa River, Colorado, in areas abutted by
NRL. The Yampa River population should be thoroughly inven-
toried for existing status and for use as a potential stock
for other sites. The other major rivers of western Colorado
(White, Colorado, Gunnison, Dolores and San Miguel) should
also be inventoried, not only for existing populations, but
also for potential sites for reintroduction.
A

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