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Last modified
7/14/2009 5:02:33 PM
Creation date
6/1/2009 11:59:55 AM
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Template:
UCREFRP
UCREFRP Catalog Number
8165
Author
Czapla, T. E.
Title
Genetics Management Plan (Revised).
USFW Year
1999.
USFW - Doc Type
Denver, Colorado.
Copyright Material
NO
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t <br />Humpback Chub: This species is considered third in priority within the Recovery Program, mainly because <br />limited information on the status and trends of the various identified stocks suggests the stocks aze small but <br />stable. <br />Yampa River Stock <br />This humpback chub stock was assigned Priority " 2" because it is located in the relatively unaltered <br />Yampa River. Concern of nonnative fish predation impacting this stock is currently under <br />investigation <br />Desolation-Gray Canyon Stock <br />The humpback chub stock in Desolation -Gray Canyons of the Green River were assigned Priority <br />"1" because of small numbers of fish, morphological variation, and remoteness in the upper basin. <br />Black Rocks Stock <br />A priority of "4" was assigned to this stock because the phenotypes indicate a pure humpback chub <br />stock. Recent population estimates suggest this population is within the range of current Interim <br />Management Objective tazgets. <br />Westwater Canyon <br />This stock was assigned Priority "4" because the phenotypes appeaz to be pure humpback chubs like <br />the Black Rocks Canyon stock. Recent population estimates suggest this population is within the <br />range of current Interim Management Objective tazgets. <br />Cataract Canyon Stock <br />This humpback chub stock was assigned priority " 3" within the species because the phenotypes <br />indicate the stock is not as variable as the Yampa River and Desolation -Gray Canyon stock and the <br />stock is less likely to be impacted from human activities. <br />Colorado Pikeminnow: The Colorado pikeminnow was assigned priority "4" among the four endangered <br />fishes in the upper basin. Recent population estimates aze below the currently accepted Interim Management <br />Objectives, yet catch-per-unit-effort data from the annual Interagency Standazdized Monitoring Program has <br />not shown any decline. <br />Green/Yampa River Stock <br />The Yampa River stock was assigned priority " 3" for the species. <br />Desolation-Gray Canyon Stock <br />The Desolation -Gray Canyon stock of Colorado pikeminnow was assigned priority " 2". <br />Upper Colorado River Stock <br />The Colorado pikeminnow stock in the' Upper Colorado River (upstream from Westwater Canyon) as <br />assigned priority "1 ". These numbers aze lower than in the Green River and the species has become <br />extirpated from a large part of the historic habitat above barriers (e.g., the reach of the Colorado River <br />between Rifle, Colorado and the Price-Stub Irrigation Diversion Dam). Activities aze underway to begin <br />stream side spawning, intensive culture and augmentation stocking to increase the population and expand <br />the range of this Colorado pikeminnow stock <br />1 <br />15 <br />
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