Behavioral Response of Juvenile Chinook Salmon to Surgical Implantation of Micro‐acoustic Transmitters

Singer, Gabriel P.; Hansen, Matthew J.; Ho, Kristina V.; Lee, Katie W.; Cocherell, Dennis E.; Klimley, A. Peter; Rypel, Andrew L.; Fangue, Nann A.

doi:10.1002/tafs.10147

Cited by 6 publications

(2 citation statements)

References 71 publications

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“…Prior to surgeries, fish were anesthetized with a buffered, 90-mg/l solution of tricaine methanesulfonate (MS-222; Argent Chemical, Redmond, Washington). Additional surgery details and information on handling and anesthesia were similar to those described in [ 36 ]. Tagging was performed under ESA Section 10(a)(1)(A) permit #20571, and adhered to the policies of University IACUC #21614.…”

Section: Methodsmentioning

confidence: 99%

Swimming behavior of emigrating Chinook Salmon smolts

et al. 2022

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Swimming behavior of Chinook Salmon (Oncorhynchus tshawytscha) smolts affects transit time, route selection and survival in complex aquatic ecosystems. Behavior quantified at the river reach and junction scale is of particular importance for route selection and predator avoidance, though few studies have developed field-based approaches for quantifying swimming behavior of juvenile migratory fishes at this fine spatial scale. Two-dimensional acoustic fish telemetry at a river junction was combined with a three-dimensional hydrodynamic model to estimate in situ emigration swimming behavior of federally-threatened juvenile Chinook salmon smolts. Fish velocity over ground was estimated from telemetry, while the hydrodynamic model supplied simultaneous, colocated water velocities, with swimming velocity defined by the vector difference of the two velocities. Resulting swimming speeds were centered around 2 body lengths/second, and included distinct behaviors of positive rheotaxis, negative rheotaxis, lateral swimming, and passive transport. Lateral movement increased during the day, and positive rheotaxis increased in response to local hydrodynamic velocities. Swim velocity estimates were sensitive to the combination of vertical shear in water velocities and vertical distribution of fish.

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Section: Methodsmentioning

confidence: 99%

Swimming behavior of emigrating Chinook Salmon smolts

et al. 2022

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“…Temperature acclimation at the release site prior to release followed a protocol of adjusting by 2 • C per hour until the transport tank temperature equaled in-river temperatures. Additional details on methods of surgery and handling are described in [16].…”

Section: Fish Release and Acoustic Telemetrymentioning

confidence: 99%

Development and Evaluation of a Chinook Salmon Smolt Swimming Behavior Model

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Holleman

Thomas

et al. 2021

Water

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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.

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Outmigration survival of wild Chinook salmon smolts through the Sacramento River during historic drought and high water conditions

et al. 2020

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Populations of wild spring-run Chinook salmon in California's Central Valley, once numbering in the millions, have dramatically declined to record low numbers. Dam construction, habitat degradation, and altered flow regimes have all contributed to depress populations, which currently persist in only a few tributaries to the Sacramento River. Mill Creek (Tehama County) continues to support these threatened fish, and contains some of the most pristine spawning and rearing habitat available in the Central Valley. Despite this pristine habitat, the number of Chinook salmon returning to spawn has declined to record low numbers, likely due to poor outmigration survival rates. From 2013 to 2017, 334 smolts were captured and acoustic tagged while outmigrating from Mill Creek, allowing for movement and survival rates to be tracked over 250 km through the Sacramento River. During this study California experienced both a historic drought and record rainfall, resulting in dramatic fluctuations in year-to-year river flow and water temperature. Cumulative survival of tagged smolts from Mill Creek through the Sacramento River was 9.5% (±1.6) during the study, with relatively low survival during historic drought conditions in 2015 (4.9% ± 1.6) followed by increased survival during high flows in 2017 (42.3% ± 9.1). Survival in Mill Creek and the Sacramento River was modeled over a range of flow values, which indicated that higher flows in each region result in increased survival rates. Survival estimates gathered in this study can help focus management and restoration actions over a relatively long migration corridor to specific regions of low survival, and provide guidance for management actions in the Sacramento River aimed at restoring populations of threatened Central Valley spring-run Chinook salmon.

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Behavioral Response of Juvenile Chinook Salmon to Surgical Implantation of Micro‐acoustic Transmitters

Cited by 6 publications

References 71 publications

Swimming behavior of emigrating Chinook Salmon smolts

Swimming behavior of emigrating Chinook Salmon smolts

Development and Evaluation of a Chinook Salmon Smolt Swimming Behavior Model

Outmigration survival of wild Chinook salmon smolts through the Sacramento River during historic drought and high water conditions

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