9458

• UCREFRP Catalog Number: 9458
• Author: National Park Service.
• Title: Workshop on Population Estimates for Colorado Pikeminnow and Humpback Chub.
• USFW Year: 2001.
• USFW - Doc Type: Fort Collins.
• Copyright Material: NO

....."..D.EC-04-2001 TUE 12:00 PM FISHERY & WILDLIFE

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Abundance estimation

conclusions cont.

. White River populatioll about l, 1 00 animall>
. Reasonably well estimated, CV.abollt 16%

Study Area

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FAX NO. 9704915091 P, 07

Abundance estimation

conclusions cont.

. Yampa River population small, probably
between 150 to 800 animals
. Poorly estimated, CV about 35%
. p.hats similar to other riven, data sparse

Deso-Grey Green River

sampling, 2001

. A total of3 passes completed
. 29 sampling days
. About 240 hours electro fishing time
. Total of 256 individuals captured
. Total of26 recaptures. 10% rate

Lower Green River sampling,
200l

. A total of 4 passes completed
. 40 sampling days
. 317 hours electl'ofishing time
. 1'otal of 209 individuals captured
. Total of34 recaptures (4 twice), 160ft. rate

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