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Project Information

Title: Restoration of Coghill Lake Sockeye Salmon

Project Year and Number: 1997: 97259-CLO

Other Fiscal Years and Numbers for this Project: 1996: 96259, 1995: 95259, 1994: 94259

Principal Investigator (PI): Jim Edmundson, Alaska Department of Fish & Game

Assisting Personnel: Stan Carlson, Gary Kyle, Pat Shields

Research Location: Prince William Sound

Restoration Category: General Restoration

Injured Resources Addressed: Sockeye Salmon

Abstract: Coghill Lake has been historically the major producer of sockeye salmon in Prince William Sound and a mainstay of commercial and sport fisheries. Beginning in 1993, the Trustee Council has funded a program to fertilize Coghill Lake to increase zooplankton levels, which in turn benefits juvenile sockeye growth and survival. After three years of lake fertilization, primary and secondary productivity have increased, the smolt migrations have increased five-fold, and the escapement goal in 1995 was achieved. This does not constitute a complete recovery as the zooplankton density is lower than desired. However, sockeye production in this lake has increased to attain adequate escapement. A fifth year of lake fertilization originally envisioned and two years of post-fertilization assessment will not be completed, as the Chief Scientist has recommended that this project be closed out in FY 97.


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Proposal: PDF Not Available

Funding Recommendations: View

Funding Detail For: 1997

Quarterly Project Tasks For: 1997

Annual Report: 1997: Not Available

Final Report: See Project 1081

Publications from this Project: None Available

More information may be available for this project under other years:

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Project Number Proposal Annual Reports Final Report Data
1996: 96259 Not Available 1996: Not Available
View No datasets
1995: 95259 Not Available 1995: View (PDF)
See Project 96259 See Project 96259
1994: 94259 Not Available 1994: View (PDF)
View See Project 96259