River environment effects on adult migration phenology and rate of spring-run Chinook Salmon

Transactions of the American Fisheries Society, Год журнала: 2025, Номер unknown

Опубликована: Март 18, 2025

ABSTRACT Objective Our overarching objective was to better understand how river environment affects the migration phenology and behavior of adult Chinook Salmon Oncorhynchus tshawytscha in a watershed (Oregon’s Willamette River basin) where climate warming other habitat impacts threaten spring-run population. Methods We analyzed annual spring runs using 23-year time series daily counts at Falls (river kilometer 42, measuring from River–Columbia confluence) relation discharge temperature data nearby gauge site. also examined stock-specific upstream rates with general linear models monitoring 909 radio-tagged explore effects fish traits on movement through 13 main-stem tributary reaches. Results migrated earlier warm, low-flow years. Mean conditions May were best predictors median run timing dates, which ranged early mid-June. Radio-tagged salmon moved faster when temperatures higher lower. Tagged much (∼25–50 km/d) low-gradient reaches than steeper (mostly <10 km/d). Individual traits, including stock origin, generally not statistically associated rate after accounting for water discharge. Phenology results Yukon, Columbia, Snake basins broadly aligned those basin. Conclusions study offer mechanistic explanation why migrations occur warmer years across broad geographic range. The suggest that some spring-migrating populations may continue trend earlier, behaviorally plastic response uncertain implications. Of particular concern are risks presented by increased freshwater residency like upper Salmon.

Язык: Английский

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A State-Space Model to Quantify Density Dependence, Demographic Heterogeneity, and Spatial Synchrony in Grande Ronde Basin Chinook Salmon Populations

Опубликована: Янв. 1, 2025

Язык: Английский

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Genetic variation associated with adult migration timing in lineages of Steelhead and Chinook Salmon in the Columbia River

Evolutionary Applications, Год журнала: 2023, Номер 17(2)

Опубликована: Дек. 28, 2023

Abstract With the discovery of a major effect region (GREB1L, ROCK1) for adult migration timing in genomes both Chinook Salmon and Steelhead, several subsequent studies have investigated size distribution early late alleles among populations Columbia River. Here, we synthesize results these lineages Steelhead that include highly distinct groups interior River exhibit atypical life histories from most coastal lineage two species. Whole‐genome with high marker density provided extensive insight into SNPs associated timing, suites markers each species been genotyped large numbers individuals to further validate phenotypic effects. For largest sizes observed (36% variation passage at Bonneville Dam; 43% tributary arrival timing) compared inland (7.5% 8.4% overwinter freshwater prior spawning. Salmon, all three multiple phenotypes (Coastal lineage: percentage 27.9% Dam, 28.7% spawning; Interior ocean type: 47.6% 39.6% 77.9% stream 35.3% 9.8% 4.7% spawning). Together, extended our understanding genetic history diversity River, however, much research remains necessary determine causal mechanism this on

Язык: Английский

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Quantification of thermal impacts across freshwater life stages to improve temperature management for anadromous salmonids

Conservation Physiology, Год журнала: 2022, Номер 10(1)

Опубликована: Янв. 1, 2022

Water temperature is the major controlling factor that shapes physiology, behaviour and, ultimately, survival of aquatic ectotherms. Here we examine effects on Chinook salmon (Oncorhynchus tshawytscha), a species high economic and conservation importance. We implement framework to assess how incremental changes in impact across populations based thermal performance models for three freshwater life stages salmon. These temperature-dependent were combined with local spatial distribution phenology data translate spatial-temporal stream into maps stage-specific physiological space time. Specifically, converted (i.e. energy used by pre-spawned adults, mortality incubating embryos juvenile growth rate) common currency measures order compare stages. Based from two abnormally warm dry years managed rivers Central Valley, California, during pre-spawning holding was higher than embryonic or prior smolting. However, found helped mitigate negative impacts. In theoretical application, showed temperatures may inhibit successful reintroduction threatened Valley spring-run where they have been extirpated. To increase population sizes, especially declining spring-run, our results indicate adults need more cold-water habitat currently available reduce stemming temperatures. conclude, an effective way calculate impacts multiple salmonid within river over time, providing managers information minimize populations, particularly important when resources are scarce.

Язык: Английский

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Applied aspects of the cardiorespiratory system

Fish physiology, Год журнала: 2022, Номер unknown, С. 189 - 252

Опубликована: Янв. 1, 2022

Язык: Английский

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Scope of the cortisol stress response in Chinook salmon during maturation

Fisheries Research, Год журнала: 2022, Номер 254, С. 106416 - 106416

Опубликована: Июль 1, 2022

Язык: Английский

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Do metapopulations and management matter for relict headwater bull trout populations in a warming climate?

Ecological Applications, Год журнала: 2022, Номер 32(5)

Опубликована: Март 28, 2022

Mountain headwater streams have emerged as important climate refuges for native cold-water species due to their slow velocities and extreme physical conditions that inhibit non-native invasions. Species persisting in often do so fragmented, relict populations from broader historical distributions are subject ongoing habitat reductions increasing isolation change progresses. Key conservation planning is determining where remaining will persist how restoration strategies can improve biological resilience enhance the long-term prospects of concern. Studying bull trout, a northwestern USA, we developed occupancy models using data set population occurrence 991 natal patches with suite novel geospatial covariates derived high-resolution hydroclimatic scenarios other sources representing watershed instream conditions, patch geometry, disturbance, interactions. The best model correctly predicted trout status 82.6% included effects for: size estimated volume, extent within-patch reaches <9°C mean August temperature, distance nearest occupied patch, road density, invasive brook prevalence, slope, frequency high winter flows. was used assess 16 within study represented range under three climatic (baseline, moderate change, change). Results suggested regional improvements were difficult achieve realistic pervasive nature limited actions given costs. However, probabilities subset highly responsive actions, suggesting targeted investments some may be contextually beneficial. A possible strategy, therefore, focusing effort on near more robust strongholds, thereby contributing local enclaves dispersal among further enhances resilience. Equally important, strongholds constituted small numerical percentage (5%-21%), yet encompassed large majority by volume (72%-89%) protection could significant benefits trout.

Язык: Английский

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Egg retention of high-latitude sockeye salmon (Oncorhynchus nerka) in the Pilgrim River, Alaska, during the Pacific marine heatwave of 2014–2016

Polar Biology, Год журнала: 2021, Номер 44(8), С. 1643 - 1654

Опубликована: Июнь 18, 2021

Язык: Английский

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High egg retention in Chinook Salmon Oncorhynchus tshawytscha carcasses sampled downstream of a migratory barrier

Journal of Fish Biology, Год журнала: 2021, Номер 100(3), С. 715 - 726

Опубликована: Дек. 27, 2021

Barriers in rivers have the potential to severely decrease functional connectivity between habitats. Failure pass barriers and reach natal spawning habitat may compromise individual reproductive success, particularly for semelparous, philopatric species that rely on free-flowing during their once-in-a-lifetime migrations. To investigate consequences of in-river fish we quantified egg retention effort (caudal fin wear) female Chinook Salmon Oncorhynchus tshawytscha carcasses collected downstream Whitehorse Hydro Plant upper Yukon River at a nearby tributary (Teslin River) from 2018 2020 (~2900 km migrations). Previous studies demonstrated large proportion attempting locations upstream hydro plant fail associated fishway. We estimated nearly all salmon failing attempted non-natal downstream, but these females retained ~34% total fecundity compared ~6% river. Females also had lower wear caudal fin, characteristic was correlated with increased deposition. Egg did not vary across years different run sizes, propose driven by density-dependent mechanisms. Findings this work indicate can still deposit eggs following failed passage failure sites, though rates are considerably higher uncertainties remain about success. encourage researchers incorporate carcass surveys into evaluations semelparous fully account passage.

Язык: Английский

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Effects of Supplementation in Upper Yakima River Chinook Salmon

Transactions of the American Fisheries Society, Год журнала: 2022, Номер 151(3), С. 373 - 388

Опубликована: Фев. 8, 2022

Abstract To promote recovery of natural salmonid populations, managers are utilizing hatchery supplementation programs to increase abundance spawners on the spawning grounds. However, studies have provided evidence that captive breeding can result in domestication, demonstrated by lower fitness hatchery‐origin compared with natural‐origin fish. Supplementation programs, therefore, typically use broodstock an effort minimize long‐term negative impacts. Here we evaluated upper Yakima River spring program for Chinook Salmon Oncorhynchus tshawytscha , which has comprised exclusively unmarked fish presumed be natural‐origin. Using 5 years spawner data, tested effects and rearing total adult returns their individual reproductive success when naturally. Our study revealed increased overall naturally average, spawners, had reduced success, also translated three out five return spawned As expected, body length timing were significant predictors success. more generations data needed establish extent is passed produced progeny.

Язык: Английский

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