All Fish, All the Time: A Good General Objective for Fish Passage Projects?

Harvey, Bret C.; Railsback, Steven F.

doi:10.1002/fsh.10549

Cited by 4 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2023) modified to include the out‐migration of smolts (Railsback et al. 2013; Harvey and Railsback 2021). The spatially explicit aspect of the model relies on site‐specific delineation of habitat cells and hydraulic modeling.…”

Section: Methodsmentioning

confidence: 99%

“…To better understand the consequences of the restoration project for fish, we simulated both the pre-and post-restoration stream channels using a spatially explicit, individual-based model of salmonids (version 7 of inSTREAM; Railsback et al 2023) modified to include the out-migration of smolts (Railsback et al 2013;Harvey and Railsback 2021). The spatially explicit aspect of the model relies on site-specific delineation of habitat cells and hydraulic modeling.…”

Section: Fish Modelmentioning

confidence: 99%

See 1 more Smart Citation

Empirical and model‐based evaluation of a step‐pool stream restoration project: Consequences for a highly valued fish population

Harvey,

White,

Nakamoto

et al. 2024

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

ObjectiveWe sought to measure a step‐pool restoration project's effects on a steelhead Oncorhynchus mykiss population and explore the capability of process‐based modeling to enhance understanding of the results.MethodsWe used before‐after–control‐impact monitoring in combination with a process‐based, individual‐based, spatially explicit fish population model to evaluate a stream restoration project that reconfigured the channel and primarily added step pools to a reach of a second‐order stream in northwestern California.ResultFive years of monitoring both before (2012–2016) and after (2018–2022) restoration indicated that restoration caused substantial increases in the abundance and biomass of steelhead. Individual growth rates and retention of fish in the study reach did not exhibit consistent patterns, even in the first 2 years after restoration, when fish abundance and biomass exhibited extreme increases of about fivefold. Model simulations predicted about a twofold increase in the abundance and biomass of steelhead in the restoration reach, which corresponded with the empirical results 4–5 years after restoration. The model also predicted a similar increase in the production of steelhead out‐migrants, a response we did not attempt to measure in the field.ConclusionStep‐pool restoration benefitted steelhead. The model's correspondence with empirical observations indicates its potential applicability to more complex resource management questions in the study area, such as how restoration will combine with changes in climate to affect the sustainability of salmonid populations.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Fish Modelmentioning

confidence: 99%

Empirical and model‐based evaluation of a step‐pool stream restoration project: Consequences for a highly valued fish population

Harvey,

White,

Nakamoto

et al. 2024

N American J Fish Manag

Self Cite

View full text Add to dashboard Cite

show abstract

InSTREAM 7: Instream flow assessment and management model for stream trout

Railsback

Ayllón

Harvey

2021

River Research & Apps

Self Cite

View full text Add to dashboard Cite

Mechanistic, individual-based simulation models have been used for >25 years to overcome well-known limitations of "habitat suitability" models. InSTREAM 7 is the latest of our individual-based models for predicting the effects of flow and temperature regimes on stream salmonid populations. Unlike PHABSIM (or other methods based on habitat "quality," e.g., as net rate of energy intake), inSTREAM mechanistically represents specific effects of flow and temperature on all life stages, and how those effects combine into testable predictions of population measures such as abundance, relative abundance of multiple trout species, and persistence. InSTREAM 7 is the first version to also represent the daily light cycle (dawn, day, dusk, and night) and how feeding, predation risk, and individual behavior vary among light phases. An example assessment illustrates the importance of inSTREAM's multiple mechanisms: predicted trout population response to flow and temperature regimes depended on the effects of sub-lethal temperatures on feeding behavior and effects of temperature on egg survival and development, as well as how depth and velocity affected growth and predation risk. While its input data requirements are comparable to PHABSIM's, inSTREAM provides a more comprehensive framework for thinking about and predicting specific, well-known effects of flow and temperature. It has also proven useful for designing and evaluating restoration projects and for prioritizing alternative management actions. InSTREAM 7 is free, open-source, completely updated with recent literature, and implemented in the popular NetLogo software platform that makes customization easy.

show abstract

Assisted migration of coho salmon: Influences of passage and habitat availability on population dynamics

Benjamin,

Dunham,

Scheidt

et al. 2024

River Research & Apps

View full text Add to dashboard Cite

Assisted migration is a means of introducing a species into a previously unoccupied area. Although this idea is relatively new for many species, there are many extant examples involving fish that can be instructive. We studied a case of assisted migration where upstream access of migrating adult coho salmon Oncorhynchus kisutch over a naturally impassible barrier was established through construction of fish ladders. Although these passage structures have successfully allowed coho salmon to colonize upstream locations, managers had concerns regarding how efficiently these structures passed fish, as well as questions regarding access to specific upstream habitats, and passage barriers further upstream. To address these concerns, we developed a stage‐based population model to explore: (1) influences of passage over structures, (2) rearing habitats upstream of the structures, and (3) consequences of additional barriers to passage in the system. Model simulations suggest high fish passage at the ladders was associated with the highest smolt and adult abundance of coho salmon. The importance of passage was strongly influenced by juveniles rearing in a lake, where increased lake rearing at each passage scenario increased abundance of smolts and adults. Opening habitat further upstream was estimated to increase adult and smolt abundance up to 12%. Results of model simulations also helped to identify uncertainties that could be evaluated further (e.g., juvenile rearing in the lake). In general, our findings point to the importance of considering a full range of processes that can drive expected outcomes for assisted migration.

show abstract

All Fish, All the Time: A Good General Objective for Fish Passage Projects?

Cited by 4 publications

References 18 publications

Empirical and model‐based evaluation of a step‐pool stream restoration project: Consequences for a highly valued fish population

Empirical and model‐based evaluation of a step‐pool stream restoration project: Consequences for a highly valued fish population

InSTREAM 7: Instream flow assessment and management model for stream trout

Assisted migration of coho salmon: Influences of passage and habitat availability on population dynamics

Contact Info

Product

Resources

About