Characterizing the movements and habitat use of two fish species of concern in a regulated ecosystem

Garavelli, Lysel; Blackburn, Shannon; Scholz, Allan T.; Connor, Jason M.; Paluch, Mark C.; Olson, Jason; Bellgraph, Brian J.

doi:10.1007/s10750-021-04625-7

Cited by 2 publications

(7 citation statements)

References 48 publications

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“…2019; Garavelli et al. 2021). In the years after 1992, we inspected all captured Bull Trout for evidence of prior radio‐tagging.…”

Section: Methodsmentioning

confidence: 99%

“…We selected a subsample of captured Bull Trout for radiotelemetry tag implantation and released the remainder. Radiotelemetry is a prominent method for tracking freshwater fish (Starcevich et al 2012;Brownscombe et al 2019;Garavelli et al 2021). In the years after 1992, we inspected all captured Bull Trout for evidence of prior radio-tagging.…”

Section: Fish Capture and Taggingmentioning

confidence: 99%

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Evaluating streamflow and temperature effects on Bull Trout migration and survival with linear spatial capture–recapture models

Wohner,

Thurow,

Peterson

2024

Trans Am Fish Soc

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ObjectiveIn the U.S. Pacific Northwest, climate change is increasing air temperatures, decreasing warm season (April–September) streamflow, and increasing cool season (October–March) streamflow. Warmer water temperatures may alter conditions for migratory coldwater fishes like the Bull Trout Salvelinus confluentus. Consequently, an understanding of Bull Trout migration and survival is critical for species conservation and restoration. In the Salmon River basin, Idaho, 1992 and 1993 transpired to be two of the most opposing extreme years among the past three decades for warm season water temperature and streamflow. These extremes provided a unique opportunity to retrospectively compare Bull Trout survival and migration under potential climate change scenarios.MethodsWe evaluated prespawning and postspawning migrations and survival of fluvial Bull Trout that were radio‐tagged and tracked from 1992 to 1994. We used a Cormack–Jolly–Seber linear spatial capture–recapture model to simultaneously model the migration and survival of radio‐tagged prespawn (n = 58) and postspawn (n = 23) Bull Trout among weeks and river reaches with streamflow, water temperature, and habitat covariates.ResultMost individual prespawning migrations were similar among tagged fish, whereas postspawn fish adopted multiple migration and overwintering strategies. Movements of prespawn Bull Trout were larger when (1) weekly average daily maximum streamflow increased and (2) weekly average daily maximum water temperature increased. The model estimated that at least 52% of spawners survived to spawning, and mean weekly prespawning apparent survival was higher in the low‐streamflow year (1992) than in the year with higher and more variable streamflow (1993). Survival of 1992–1994 fish during the 38‐week postspawning period was intermediate to that in the prespawning period. Detections of prespawn Bull Trout were generally higher at sites with more complex habitats, less large woody debris, and fewer undercut banks.ConclusionWe found that the prespawn life stage can represent a shorter time frame (14–18 weeks) with increased mortality compared to the longer postspawning period (38 weeks). Bull Trout apparent survival increased with lower streamflow variability, indicating that expected future changes in climate may adversely affect Bull Trout.

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“…2019; Garavelli et al. 2021). In the years after 1992, we inspected all captured Bull Trout for evidence of prior radio‐tagging.…”

Section: Methodsmentioning

confidence: 99%

Section: Fish Capture and Taggingmentioning

confidence: 99%

Evaluating streamflow and temperature effects on Bull Trout migration and survival with linear spatial capture–recapture models

Wohner,

Thurow,

Peterson

2024

Trans Am Fish Soc

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“…Large migratory salmonids are commonly captured during electrofishing surveys below the dam. Bull Trout captured below AFD are known to assign to populations upstream of the dam (Garavelli et al 2021). Albeni Falls Dam creates inhospitable conditions for migratory fish below the dam during summer months when water temperatures rise (Mejia et al 2020).…”

Section: Study Areamentioning

confidence: 99%

“…Albeni Falls Dam creates inhospitable conditions for migratory fish below the dam during summer months when water temperatures rise (Mejia et al 2020). Migratory salmonids, including WCT, are known to seek out coldwater refugia in the Pend Oreille River below AFD and have also been observed possibly attempting to pass the dam (Garavelli et al 2021). For these reasons, AFD has been considered as a site for constructing facilities that are capable of passing entrained salmonids, such as Bull Trout and WCT.…”

Section: Study Areamentioning

confidence: 99%

“…Assisted migration has also been attempted for Westslope Cutthroat Trout (WCT) Oncorhynchus lewisi in this system at Cabinet Gorge Dam (Bernall et al 2021) and Box Canyon Dam (Hank Jones, Inland NorthWest Fishing Guides, personal communication). Populations of this highly valued western native salmonid (Behnke 1988;Walrath et al 2015;Mallet and Thurow 2022) are known to experience life history disruption from the same barriers as Bull Trout (Ardren and Bernall 2017;Garavelli et al 2021;Corsi et al 2022). Drastic declines in WCT abundance have been noted by CFPOR basin managers since the 1950s (Rieman and Apperson 1992).…”

Section: Introductionmentioning

confidence: 99%

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Population assignment of migratory Westslope Cutthroat Trout (WCT) in the Clark Fork–Pend Oreille River basin

Wells,

Connor,

Small

et al. 2024

Trans Am Fish Soc

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ObjectiveThe Clark Fork–Pend Oreille River basin of northeastern Washington and the Idaho Panhandle historically supported a robust metapopulation of the Westslope Cutthroat Trout (WCT) Oncorhynchus lewisi, a western native salmonid of high cultural and economic value. The construction of impassible hydroelectric dams and smaller instream barriers has prevented the return of migratory WCT to spawning tributaries, leading to the fragmentation of this metapopulation over the past 100 years. One such impassible barrier is Albeni Falls Dam (AFD) near Newport, Washington, which was completed without fish passage capabilities in 1955. We sought to examine large‐scale genetic patterns in the study area and determine the most likely spawning tributary of origin for migratory WCT captured below AFD.MethodsWe created a genetic baseline representative of populations within the Clark Fork–Pend Oreille River basin from upstream and downstream of the dam using 191 biallelic single‐nucleotide polymorphism genetic markers. Our data set included 124 collections, which allowed for an examination of population structure and hatchery influence across the study area and provided a robust tool for population assignment. Population assignment tests were conducted using the program RUBIAS.ResultPopulation assignment tests were successful for all pure WCT of unknown origin despite potential influence from hatchery lineages across the study area. Of 83 migratory WCT captured below AFD, approximately 80% were assigned to tributaries upstream of AFD with a posterior assignment probability of at least 90%. Only one fish was assigned to a tributary downstream of AFD.ConclusionOur results indicate that AFD disrupts the natural metapopulation dynamics of WCT populations in the basin. Passage for WCT at this barrier would reestablish metapopulation connectivity within the basin by allowing migratory individuals to make genetic contributions to populations upstream of the dam.

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Characterizing the movements and habitat use of two fish species of concern in a regulated ecosystem

Cited by 2 publications

References 48 publications

Evaluating streamflow and temperature effects on Bull Trout migration and survival with linear spatial capture–recapture models

Evaluating streamflow and temperature effects on Bull Trout migration and survival with linear spatial capture–recapture models

Population assignment of migratory Westslope Cutthroat Trout (WCT) in the Clark Fork–Pend Oreille River basin

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