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Title: Yakima River Species Interactions Studies, Annual Report 2002.

Abstract

This report is intended to satisfy two concurrent needs: (1) provide a contract deliverable from the Washington Department of Fish and Wildlife (WDFW) to the Bonneville Power Administration (BPA), with emphasis on identification of salient results of value to ongoing Yakima/Klickitat Fisheries Project (YKFP) planning, and (2) summarize results of research that have broader scientific relevance. This is the eleventh of a series of progress reports that address species interactions research and supplementation monitoring of fishes in response to supplementation of salmon and steelhead in the upper Yakima River basin. This progress report summarizes data collected between January 1, 2002 and December 31, 2002. These data were compared to findings from previous years to identify general trends and make preliminary comparisons. Interactions between fish produced as part of the YKFP, termed target species or stocks, and other species or stocks (non-target taxa) may alter the population status of non-target species or stocks. This may occur through a variety of mechanisms, such as competition, predation, and interbreeding. Furthermore, the success of a supplementation program may be limited by strong ecological interactions such as predation or competition. Our work has adapted to new information needs as the YKFP has evolved. Initially, ourmore » work focused on interactions between anadromous steelhead and resident rainbow trout (for explanation see Pearsons et al. 1993), then interactions between spring chinook salmon and rainbow trout, and recently interactions between spring chinook salmon and highly valued nontarget taxa (NTT; e.g., bull trout); and interactions between strong interactor taxa (e.g., those that may strongly influence the abundance of spring chinook salmon; e.g., smallmouth bass) and spring chinook salmon. The change in emphasis to spring chinook salmon has largely been influenced by the shift in the target species planned for supplementation (Bonneville Power Administration et al. 1996; Fast and Craig 1997). Originally, steelhead and spring chinook salmon were proposed to be supplemented simultaneously (Clune and Dauble 1991). However, due in part to the uncertainties associated with interactions between steelhead and rainbow trout, spring chinook and coho salmon were supplemented before steelhead. This redirection in the species to be supplemented has prompted us to prioritize interactions between spring chinook and rainbow trout, while beginning to investigate other ecological interactions of concern. Prefacility monitoring of variables such as rainbow trout density, distribution, and size structure was continued and monitoring of other NTT was initiated in 1997. This report is organized into two chapters that represent major topics associated with monitoring stewardship, utilization, and strong interactor taxa. Chapter 1 reports the results of non-target taxa monitoring after the fourth release of hatchery salmon smolts in the upper Yakima Basin. Chapter 2 describes predation on juvenile salmonids by smallmouth bass and channel catfish in the lower Yakima River.« less

Authors:
Publication Date:
Research Org.:
Washington Department of Fish and Wildlife
Sponsoring Org.:
US Bonneville Power Administration
OSTI Identifier:
825344
Report Number(s):
DOE/BP-00004666-10
TRN: US200423%%40
DOE Contract Number:  
00004666
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 May 2003; Related Information: Yakima/Klickitat Fisheries Project Montoring and Evaluation
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; ABUNDANCE; BONNEVILLE POWER ADMINISTRATION; DISTRIBUTION; FISHERIES; FISHES; INFORMATION NEEDS; JUVENILES; MONITORING; PLANNING; PROGRESS REPORT; RIVERS; SALMON; TARGETS; TROUT; FISH POPULATIONS - WASHINGTON (STATE) - YAKIMA RIVER WATERSHED; FISHERY RESOURCES - HATCHERY VS. WILD STOCKS - WASHINGTON (STATE) - YAKIMA RIVER WATERSHED.

Citation Formats

Pearsons, Todd N. Yakima River Species Interactions Studies, Annual Report 2002.. United States: N. p., 2003. Web. doi:10.2172/825344.
Pearsons, Todd N. Yakima River Species Interactions Studies, Annual Report 2002.. United States. https://doi.org/10.2172/825344
Pearsons, Todd N. 2003. "Yakima River Species Interactions Studies, Annual Report 2002.". United States. https://doi.org/10.2172/825344. https://www.osti.gov/servlets/purl/825344.
@article{osti_825344,
title = {Yakima River Species Interactions Studies, Annual Report 2002.},
author = {Pearsons, Todd N},
abstractNote = {This report is intended to satisfy two concurrent needs: (1) provide a contract deliverable from the Washington Department of Fish and Wildlife (WDFW) to the Bonneville Power Administration (BPA), with emphasis on identification of salient results of value to ongoing Yakima/Klickitat Fisheries Project (YKFP) planning, and (2) summarize results of research that have broader scientific relevance. This is the eleventh of a series of progress reports that address species interactions research and supplementation monitoring of fishes in response to supplementation of salmon and steelhead in the upper Yakima River basin. This progress report summarizes data collected between January 1, 2002 and December 31, 2002. These data were compared to findings from previous years to identify general trends and make preliminary comparisons. Interactions between fish produced as part of the YKFP, termed target species or stocks, and other species or stocks (non-target taxa) may alter the population status of non-target species or stocks. This may occur through a variety of mechanisms, such as competition, predation, and interbreeding. Furthermore, the success of a supplementation program may be limited by strong ecological interactions such as predation or competition. Our work has adapted to new information needs as the YKFP has evolved. Initially, our work focused on interactions between anadromous steelhead and resident rainbow trout (for explanation see Pearsons et al. 1993), then interactions between spring chinook salmon and rainbow trout, and recently interactions between spring chinook salmon and highly valued nontarget taxa (NTT; e.g., bull trout); and interactions between strong interactor taxa (e.g., those that may strongly influence the abundance of spring chinook salmon; e.g., smallmouth bass) and spring chinook salmon. The change in emphasis to spring chinook salmon has largely been influenced by the shift in the target species planned for supplementation (Bonneville Power Administration et al. 1996; Fast and Craig 1997). Originally, steelhead and spring chinook salmon were proposed to be supplemented simultaneously (Clune and Dauble 1991). However, due in part to the uncertainties associated with interactions between steelhead and rainbow trout, spring chinook and coho salmon were supplemented before steelhead. This redirection in the species to be supplemented has prompted us to prioritize interactions between spring chinook and rainbow trout, while beginning to investigate other ecological interactions of concern. Prefacility monitoring of variables such as rainbow trout density, distribution, and size structure was continued and monitoring of other NTT was initiated in 1997. This report is organized into two chapters that represent major topics associated with monitoring stewardship, utilization, and strong interactor taxa. Chapter 1 reports the results of non-target taxa monitoring after the fourth release of hatchery salmon smolts in the upper Yakima Basin. Chapter 2 describes predation on juvenile salmonids by smallmouth bass and channel catfish in the lower Yakima River.},
doi = {10.2172/825344},
url = {https://www.osti.gov/biblio/825344}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu May 01 00:00:00 EDT 2003},
month = {Thu May 01 00:00:00 EDT 2003}
}