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Article

Development and Evaluation of a Chinook Salmon Smolt Swimming Behavior Model

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Department of Civil and Environmental Engineering, University of California Davis, One Shields Avenue, Davis, CA 95616, USA
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Resource Management Associates, 1756 Picasso Avenue, Suite G, Davis, CA 95618, USA
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Center for Watershed Sciences, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
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Department of Wildlife, Fish and Conservation Biology, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Ken Oakes
Water 2021, 13(20), 2904; https://doi.org/10.3390/w13202904
Received: 26 August 2021 / Revised: 5 October 2021 / Accepted: 10 October 2021 / Published: 16 October 2021
(This article belongs to the Special Issue Marine Fisheries and Ecosystem Modeling)
Hydrologic currents and swimming behavior influence routing and survival of emigrating Chinook salmon in branched migratory corridors. Behavioral particle-tracking models (PTM) of Chinook salmon can estimate migration paths of salmon using the combination of hydrodynamic velocity and swimming behavior. To test our hypotheses of the importance of management, models can simulate historical conditions and alternative management scenarios such as flow manipulation and modification of channel geometry. Swimming behaviors in these models are often specified to match aggregated observed properties such as transit time estimated from acoustic telemetry data. In our study, we estimate swimming behaviors at 5 s intervals directly from acoustic telemetry data and concurrent high-resolution three-dimensional hydrodynamic model results at the junction of the San Joaquin River and Old River in the Sacramento-San Joaquin Delta, California. We use the swimming speed dataset to specify a stochastic swimming behavior consistent with observations of instantaneous swimming. We then evaluate the effect of individual components of the swimming formulation on predicted route selection and the consistency with observed route selection. The PTM predicted route selection fractions are similar among passive and active swimming behaviors for most tags, but the observed route selection for some tags would be unlikely under passive behavior leading to the conclusion that active swimming behavior influenced the route selection of several tagged smolts. View Full-Text
Keywords: San Francisco estuary; Sacramento–San Joaquin Delta; salmonid; route selection; hydrodynamic model; movement ecology; agent-based model San Francisco estuary; Sacramento–San Joaquin Delta; salmonid; route selection; hydrodynamic model; movement ecology; agent-based model
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MDPI and ACS Style

Gross, E.S.; Holleman, R.C.; Thomas, M.J.; Fangue, N.A.; Rypel, A.L. Development and Evaluation of a Chinook Salmon Smolt Swimming Behavior Model. Water 2021, 13, 2904. https://doi.org/10.3390/w13202904

AMA Style

Gross ES, Holleman RC, Thomas MJ, Fangue NA, Rypel AL. Development and Evaluation of a Chinook Salmon Smolt Swimming Behavior Model. Water. 2021; 13(20):2904. https://doi.org/10.3390/w13202904

Chicago/Turabian Style

Gross, Edward S., Rusty C. Holleman, Michael J. Thomas, Nann A. Fangue, and Andrew L. Rypel 2021. "Development and Evaluation of a Chinook Salmon Smolt Swimming Behavior Model" Water 13, no. 20: 2904. https://doi.org/10.3390/w13202904

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