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Last modified
7/14/2009 5:02:34 PM
Creation date
5/18/2009 12:28:51 AM
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UCREFRP
UCREFRP Catalog Number
9328
Author
Miller, W. H.
Title
Analysis of Salmon and Steelhead Supplementation.
USFW Year
1990.
USFW - Doc Type
\
Copyright Material
NO
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hatchery fish are planted. These are the Middle Fork of Salmon, South Fork of Salmon, <br />and Selway Rivers. Outplanting is also restricted in other areas. The marking of all <br />hatchery steelhead has aided Idaho managers in evaluating hatchery programs and in <br />documenting the status of wild steelhead. steelhead smolt-to-adult survival goals of 1 <br />percent for hatchery fish and 2 percent for wild fish are being achieved. However, the <br />numbers of wild fish are less than needed for natural habitat seeding. <br />Spring chinook salmon runs (hatchery and wild stocks) are very depressed in Idaho. <br />Hatchery supplementation, to date, has not succeeded in rebuilding natural runs. <br />Managers are not getting close to their goal of returning 0.8 percent for hatchery fish. <br />Right now most hatchery fish returns are nearer 0.2 percent or only 25 percent of the <br />goal. <br />California <br />Background <br />Anadromous salmonids native to California are chinook, coho, sockeye, pink, chum <br />salmon, steelhead, and cutthroat trout. Historically, chinook salmon and steelhead runs <br />were widespread and abundant throughout the state. Habitat degradation, dam <br />construction, water .developments, watershed alteration, and overfishing contributed to <br />the decline of salmonids throughout the state. <br />Hatcheries were built to mitigate for these losses and are operated by the California <br />Department of Fish and Game (CDFG) and U.S. Fish & Wildlife Service (FWS). Eggs <br />were obtained from various California and out-of--state .sources to reestablish or <br />supplement dwindling stocks. The mixing of non-endemic stocks throughout California <br />have likely altered the composition of distinct gene pools. Despite this, hatchery <br />production efforts have either maintained or increased spawner escapements in many <br />waters. Anadromous fish stocking in California is in a restoration phase. They are also <br />in a harvest augmentation phase to .provide fish for commercial, sport, and tribal harvest. <br />During .the past two decades, private groups have become involved in habitat restoration <br />projects. Private propagation programs have- expanded, particularly in affected areas <br />where state involvement was minimal or lacking. <br />The federal and state management agencies, and private groups have all focused on the <br />importance of restoring fall chinook salmon and winter steelhead. These two species are <br />receiving the highest attention in both habitat rehabilitation and supplementation efforts. <br />In coastal areas where coho runs prevailed historically, interest has increased in <br />reestablishing these stocks. The distributions and abundance of sockeye, pink, and chum <br />salmon are so limited that propagation efforts for these species has not been practical. <br />16 <br />
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