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Last modified
7/14/2009 5:02:36 PM
Creation date
5/18/2009 12:09:01 AM
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Template:
UCREFRP
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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<br />1 <br /> <br />' section and the u er end of the reservoir and rovide shallow water <br />PP ~ P <br />' habitats. The reservoir provides areas of deep water, shallow bays, and <br />coves. Yearly lake level fluctuations are less than 2 m. The Bill Williams <br />River is the only tributary, and contains riparian and marsh areas.. The Bill <br />Williams River is controlled by Alamo Dam and exhibits much reduced <br />t flows into the lake. <br /> Land Ownership/Management Agencies: The Arizona State Land <br />' Department and the BLM own portions of the shoreline, as does the <br /> Service (Havasu and Bill Williams River NWRs). The Fort Mohave and <br /> Chemehuevi Tribes also own shoreline areas on the river and reservoir. <br />' Much of the remainder is privately owned. River flows and reservoir levels <br /> are controlled by USBR in Boulder City, Nevada. Flows in Bill Williams <br /> River are controlled by the U.S. Army Corps of Engineers and seldom <br />' reach the reservoir. California Department of Fish and Game, NDOW, <br /> Nevada Division of State Lands (NDSL), Colorado River Commission of <br />' Nevada (CRCN) and AGFD share fish and wildlife management <br /> responsibilities, in coordination with other agencies. <br />Species/Critical Habitat Present: Bonytail and razorback sucker are <br />present. Critical habitat for bonytail is designated in this reach (USFWS <br />1994a). <br />1 Bon ail <br /> Current Status and Recovery Efforts: In the 1930s, bonytail was one of <br /> the most common fish in the Colorado River in the reach now inundated <br /> by Lake Havasu. The populations declined significantly in the lake by the <br />' late 1960s (Mueller and Marsh 2003). Currently, the BLM and its partners <br /> are responsible for stocking 30,000 sub-adult bonytail under a 1993 <br /> biological opinion (USFWS 1993, Doelker 1996). At this time, <br /> approximately 15,000 bonytail >25cm have been stocked. To date, 9 <br /> individuals from this effort have been recovered. One was taken from the <br /> Colorado River near Laughlin (Mueller 2002), one was taken by angling <br />' from deep water near Parker Dam, six were collected from the Bill <br /> Williams River National Wildlife Refuge, and, most recently, (12/02) an <br /> individual was taken at the Havasu Springs fishing dock. An annual native <br />' fish survey was started on Lake Havasu in 2000 to assist in monitoring <br /> -these reintroductions. In addition to these activities a Beal Lake was <br /> <br /> <br />27 <br /> <br />
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