Title: Rocky Creek/Bay Restoration (Montague)
Project Year and Number: 1994: 94043-B2
Other Fiscal Years and Numbers for this Project: None
Principal Investigator (PI): Ken Hodges, DOI
Assisting Personnel: Kevin Buckley
Research Location: Prince William Sound
Restoration Category: General Restoration
Abstract: Although cutthroat trout and Dolly Varden over winter and spawn in freshwater, these fish use near shore and estuarine habitat for feeding throughout their lives. The highest concentrations of petroleum hydrocarbon metabolites in bile of all fish sampled in 1989 were found in Dolly Varden. The larger cutthroat trout also showed higher levels of mortality in oiled than in unoiled areas.
Tagging studies demonstrated that the annual mortality of adult Dolly Varden in oiled areas was 32 percent greater than in unoiled areas. In 1989-1990, there was 57 percent greater mortality, and in 1990-1991, a 65 percent greater mortality, in oiled than in unoiled areas.
Cutthroat trout growth rates in oiled areas were 68 percent in 1989-1990 and 71 percent in 1990-1991 of those in unoiled areas. Although concentrations of bile hydrocarbons were greatly reduced in 1990 and 1991, indicating less exposure to oil, it is unclear why differences persist in survival rates between oiled and unoiled streams.
Prince William Sound
Proposal: PDF Not Available
Funding Recommendations: View
Funding Detail For: 1994
Quarterly Project Tasks For: 1994
Annual Report: 1994: Not Available
Final Report: View
Publications from this Project: None Available