9552

• UCREFRP Catalog Number: 9552
• Author: U.S. Fish and Wildlife Service.
• Title: Management Plan for the Big-River Fishes of the Lower Colorado River Basin
• USFW Year: 2004.
• USFW - Doc Type: amendment and supplement to the Bonytail, Humpback chub, Colorado pikeminnow, and Razorback sucker Recovery Plans.
• Copyright Material: NO

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b. Mean estimated recruitment of age-3 (300-399 mm TL) naturally
produced fish equals or exceeds mean annual adult mortality, and
c. Each point estimate exceeds3,800 adults (MVP).
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Colorado Pikeminnow: Provisional Recovery Goals Lower Colorado River Basin'
Overview:
1. Two self-sustaining populations (e.g., mainstem and/or tributaries) are
maintained over a 7-year period beyond downlisting, starting with the 1•irst point
estimates acceptable to the Service.
Downlisting Criteria:
1. Two self-sustaining populations (e.g. mainstem and/or tributaries are
maintained over a 5-year period starting with the first point estimates
acceptable to the Service, such that for each population:
' a. the trend in adult (age 7+;>45 cm TL) point estimates does not
decline significantly, and
b. Mean estimated recruitment of age-6 (40-45 cm TL) naturally
' produced fish equals or exceeds mean annual adult mortality8, and
c. Each point estimate exceeds 2,600 adults.
' Delisting Criteria:
1. Two self-sustaining populations (e.g. mainstem and/or tributaries are
' maintained over a 7-year period beyond downlisting, starting with the first
point estimates acceptable to the Service, such that for each population:
a. the trend in adult (age 7+, >45 cm TL) point estimates does not
decline significantly, and
b. Mean estimated recruitment of age-6 (40-45 cm TL) naturally
' produced hsh equals or exceeds mean annual adult mortality, and
c. Each point estimate exceeds 26,000 adults (MVP).

~ Strategies presented in this document for this species will be considered for implementation if
' the Recovery Goals are revised to include this species in this document.
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