Experimental evaluation of the effect of a light-emitting diode device on Chinook salmon smolt entrainment in a simulated river

Hansen, Matthew J.; Steel, Anna E.; Cocherell, Dennis E.; Patrick, Paul H.; Sills, Michael; Cooke, Steven J.; Carr, K. J.; Kavvas, M. L.; Fangue, Nann A.

doi:10.1007/s10750-019-04022-1

Cited by 8 publications

(2 citation statements)

References 61 publications

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“…Systems that guide fish towards collection entrances (Scruton et al 2003;Nestler et al 2008;) or away from dangerous passage routes or undesirable locations (Schilt 2007;Kock et al 2009;Perry et al 2014;Hansen et al 2019) have received considerable attention in the primary literature. Effective guidance systems have enhanced collection at many juvenile and adult collection facilities, including at several of the trap-and-haul case study sites (e.g., on the Baker, Lewis, and North Fork Skokomish rivers).…”

Section: Guidance Systemsmentioning

confidence: 99%

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

Kock

Ferguson

Keefer

et al. 2020

Rev Fish Biol Fisheries

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High-head dams are migration barriers for Pacific salmon Oncorhynchus spp. in many river systems and recovery measures for impacted stocks are limited. Trap-and-haul has been widely used in attempts to facilitate recovery but information from existing programs has not been synthesized to inform improvements to aid recovery of salmonids in systems with high-head dams. We reviewed 17 trap-and-haul programs regarding Pacific salmon to: (1) summarize information about facility design, operation and biological effects; (2) identify critical knowledge gaps; and (3) evaluate trap-and-haul as a current and future management tool. Existing programs are operated to address a range of management goals including restoring access to historical habitats, temporarily reducing exposure to dangerous in-river conditions, and reintroducing ecological processes upstream from dams. Information gathered from decades of operation on facility design criteria and fish handling protocols, and robust literature on fish collection and passage are available. While many aspects of trap-and-haul have been evaluated, effects on population productivity and sustainability remain poorly understood. Long-term and systematic studies of trap-and-haul outcomes are rare, and assessments can be confounded by concurrent management actions and broad ecological and climatic effects. Existing data suggest that performance and effectiveness vary among programs and over various time scales within programs. Although critical information gaps exist, trap-and-haul is an important management and conservation tool for providing Pacific salmonids access to historical habitats. Successful application of trap-and-haul programs requires long-term commitment and an adaptive management approach by dam owners and stakeholders, and careful planning of new programs.

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Section: Guidance Systemsmentioning

confidence: 99%

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

Kock

Ferguson

Keefer

et al. 2020

Rev Fish Biol Fisheries

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show abstract

“…We performed the same temperature ramp with the FR and LFR Chinook salmon after they were large enough to consume pelleted feed. The salmon were then allowed to grow at that temperature until they approximated the size range of out‐migrants in the wild (Brandes et al, 2021; Hansen et al, 2019). All fish were given at least 3 weeks at 18°C before any experimental measurements were taken.…”

Section: Methodsmentioning

confidence: 99%

In hot water? Assessing the link between fundamental thermal physiology and predation of juvenile Chinook salmon

et al. 2022

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In light of ongoing environmental change, understanding the complex impact of interacting stressors on species, communities, and ecosystems is an important challenge. Many studies to date examine the effects of potential stressors on a single species of concern. Yet these effects often resonate throughout a community and may produce changes in ecosystem dynamics that are equally critical to species resilience. The aim of this study was to develop a mechanistic understanding of how a rapidly changing stressor, water temperature, will alter trophic interactions among ectothermic fish species. In our region, California's Sacramento–San Joaquin River Delta system, it has been speculated that the decreased survivorship of juvenile Chinook salmon (Oncorhynchus tshawytscha) in warming waters may be caused partly by increased predation. Temperature influences metabolic rate functions and the amount of energy available for fitness‐relevant parameters (i.e., swim performance and escape response). Consequently, we hypothesized that these patterns of predation emerge due to a physiological advantage of predators over prey at warmer temperatures. To explore this, our first objective was to determine the fundamental thermal physiology of juvenile Chinook salmon and their potential predators in the Delta. Three physiological performance traits were measured for each species across a spectrum of temperatures: aerobic scope, burst speed, and the ability to burst repeatedly. For our second objective, we assessed whether the effect of temperature on these performance traits predicted the outcome of predation trials conducted across the same temperature spectrum. We found that temperature effects were species or population specific. Additionally, absolute burst swimming ability and the relative burst performance between predator and prey were stronger indicators of trophic dynamics than aerobic scope. Our analyses also confirmed that a major predator in the Delta, specifically largemouth bass (Micropterus salmoides), is more thermally adapted to higher temperatures and will likely consume salmon with an increasing frequency as waters warm. Thus, we show that an improved understanding of how fundamental thermal physiology impacts predation can provide ecosystem managers with better tools to predictively model predation upon juvenile salmon based on prevailing and future water temperatures.

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How much light intensity to induce repulsion or attraction behaviour in juvenile salmon?

Matsuda

2024

Hydrobiologia

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Experimental evaluation of the effect of a light-emitting diode device on Chinook salmon smolt entrainment in a simulated river

Cited by 8 publications

References 61 publications

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

Review of trap-and-haul for managing Pacific salmonids (Oncorhynchus spp.) in impounded river systems

In hot water? Assessing the link between fundamental thermal physiology and predation of juvenile Chinook salmon

How much light intensity to induce repulsion or attraction behaviour in juvenile salmon?

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