9442

• UCREFRP Catalog Number: 9442
• Author: Muth, R. T. and T. E. Czapla.
• Title: Workshop Summary
• USFW Year: 2002.
• USFW - Doc Type: Designing Methods to Evaluate Stocked Fish in the Upper Colorado River, Green River, and San Juan River Subbasins.
• Copyright Material: NO

Table 2. Demographic recovery criteria for razorback sucker.

Downlisting (5 years; monitoring) Delisting (3 years after downlisting)
. Establish/maintain populations in . Maintain populations in Green River
Green River and EITHER in upper and EITHER in upper Colorado River
Colorado River or San Juan, each or San Juan River, each> 5,800
> 5,800 adults; and adults; and
. Maintain genetic refuge of adults in . Maintain genetic refuge of adults in
Lake Mohave*; and Lake Mohave; and
. Lower Colorado River Basin . . Lower Colorado River Basin maintain
establish/maintain two populations, two populations, each > 5,800 adults
each > 5,800 adults
*Majority opinion of lower basin biologists is 50,000 (5 + 3 = 8 years generation time)
adu Its ..

Table 3. Demographic recovery criteria for bonytaiL

Downlisting (5 years; monitoring) Delisting (3 years after down listing)
. Establish/maintain populations in . Maintain populations in Green River
Green River and upper Colorado and upper Colorado River, each
River, each> 4,400 adults; and > 4,400 adults; and
. Establish/maintain genetic refuge in a . Maintain genetic refuge in a suitable
suitable location in Lower Colorado location in Lower Colorado River
River Basin; and Basin; and
. Lower Colorado River Basin . Lower Colorado River Basin maintain
establish/maintain two populations, two populations, each> 4,400 adults
each> 4,400 adults
(5 + 3 = 8 years generation time)

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