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Development of an Index to Bird Predation of Juvenile Salmonids within the Yakima River.

DE2003812189

Publication Date	2002
Personal Author	Grassley, J. M.; Major, W.; Ryding, K.; Grue, C. E.
Page Count	46
Abstract	Avian predation of fish is suspected to contribute to the loss of juvenile spring chinook salmon in the Yakima Basin, potentially constraining natural production. In 1997 and 1998, the Yakama/Klickitat Fisheries Project (YKFP) and the Washington Department of Fish and Wildlife (WDFW)--whose goal is to increase natural production historically present within the Yakima River-- initiated investigations to assess the feasibility of developing an index to avian predation of juvenile salmon within the river. This research confirmed that Ring-billed Gulls and Common Mergansers were the primary avian predators of juvenile salmon, and that under certain conditions could impact migrating smolt populations.
Keywords	Predation Salmonids Yakima River Washington State Juveniles Birds Indexes Fisheries Fishes Salmon Evaluation Rivers Monitoring Tables(Data) Data collection Methodology Surveys Klickitat River Habitats Fish populations Management Juvenile fish Yakima/Klickitat Fisheries Project(YKFP) Washington Department of Fish and Wildlife (WDFW) Hotspot surveys
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Washington Univ., Seattle. School of Aquatic and Fishery Sciences.; Washington Dept. of Fish and Wildlife, Olympia.
Supplemental Notes	Sponsored by Washington Dept. of Fish and Wildlife, Olympia.
Document Type	Technical Report
NTIS Issue Number	200402

Development of an Index to Bird Predation of Juvenile Salmonids within the Yakima River.

Development of an Index to Bird Predation of Juvenile Salmonids within the Yakima River.
DE2003812189

Publication Date	2002
Personal Author	Grassley, J. M.; Major, W.; Ryding, K.; Grue, C. E.
Page Count	46
Abstract	Avian predation of fish is suspected to contribute to the loss of juvenile spring chinook salmon in the Yakima Basin, potentially constraining natural production. In 1997 and 1998, the Yakama/Klickitat Fisheries Project (YKFP) and the Washington Department of Fish and Wildlife (WDFW)--whose goal is to increase natural production historically present within the Yakima River-- initiated investigations to assess the feasibility of developing an index to avian predation of juvenile salmon within the river. This research confirmed that Ring-billed Gulls and Common Mergansers were the primary avian predators of juvenile salmon, and that under certain conditions could impact migrating smolt populations.
Keywords	Predation Salmonids Yakima River Washington State Juveniles Birds Indexes Fisheries Fishes Salmon Evaluation Rivers Monitoring Tables(Data) Data collection Methodology Surveys Klickitat River Habitats Fish populations Management Juvenile fish Yakima/Klickitat Fisheries Project(YKFP) Washington Department of Fish and Wildlife (WDFW) Hotspot surveys
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Washington Univ., Seattle. School of Aquatic and Fishery Sciences.; Washington Dept. of Fish and Wildlife, Olympia.
Supplemental Notes	Sponsored by Washington Dept. of Fish and Wildlife, Olympia.
Document Type	Technical Report
NTIS Issue Number	200402