Water Velocity, Turbulence, and Migration Rate of Subyearling Fall Chinook Salmon in the Free‐Flowing and Impounded Snake River

Tiffan, Kenneth F.; Kock, Tobias J.; Haskell, Craig A.; Connor, William P.; Steinhorst, R. Kirk

doi:10.1577/t08-051.1

Cited by 37 publications

(88 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The long distances between release locations and the dam (89-225 km) and the slowing of migration rates (Tiffan et al, 2009) would increase exposure of fish to predators and increase total predation mortality. The results from this study demonstrated that smallmouth bass predation accounted for a large portion (15%-37%) of age-0 Chinook salmon mortality from release to passage at Lower Granite Dam.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Post‐release predation mortality of age‐0 hatchery‐reared Chinook salmon from non‐native smallmouth bass in the Snake River

Erhardt

Tiffan

2018

Fisheries Management Eco

Self Cite

View full text Add to dashboard Cite

Release of age‐0 hatchery‐reared fall Chinook salmon, Oncorhynchus tshawytscha (Walbaum), in the Snake River resulted in up to 30‐fold increases in salmon consumption by non‐native smallmouth bass, Micropterus dolomieu Lacepѐde. In an upper river reach, smallmouth bass fed intensively during a release in May, but Chinook salmon consumption returned to pre‐release levels within 1–2 days as hatchery‐reared fish quickly emigrated downstream. The predation response during a June release located farther downstream was dissimilar. Chinook salmon consumption increased to a lesser extent (11‐fold), lasted several days (~4) and no changes in feeding intensity were evident. Estimated numbers of age‐0 hatchery‐reared Chinook salmon lost to short‐term predation varied by year and study reach and ranged from 12,007 (6.03% of those released) to 210,580 (14.6% of those released) fish. Short‐term, intense feeding by smallmouth bass can contribute significantly to mortality of hatchery‐reared fish and should be considered when supplementing populations with hatchery juveniles.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Survival (95% CIs) of hatchery-release groups from release to Lower Granite Dam as estimated by Arnsberg et al (2017aArnsberg et al ( , 2017b Reservoir (Miller et al, 2002;Tiffan, Kock, Haskell, Connor & Steinhorst, 2009). Sampling was limited to this stretch of river because of safety issues and time constraint.…”

Section: Study Areamentioning

confidence: 99%

Post‐release predation mortality of age‐0 hatchery‐reared Chinook salmon from non‐native smallmouth bass in the Snake River

Erhardt

Tiffan

2018

Fisheries Management Eco

Self Cite

View full text Add to dashboard Cite

show abstract

“…Water temperature, velocity, and turbidity change during flooding and have been correlated with dispersal rates of riverine fishes (Fernandes 1997;Nunn et al 2010;Rakowitz et al 2008;Swanberg 1997;Sykes et al 2009;Tiffan et al 2009). Less obvious are changes in channel water chemistry associated with large-scale flooding and catchment runoff, such as increases in the concentration of dissolved organic nitrogen (DON; Lewis 2002;Martin and Harrison 2011).…”

Section: H1: Large-scale Versus Localized Floodingmentioning

confidence: 99%

Response of a floodplain fish community to river-floodplain connectivity: natural versus managed reconnection

Stoffels

Clarke

Rehwinkel

et al. 2014

Can. J. Fish. Aquat. Sci.

View full text Add to dashboard Cite

To restore lateral connectivity in highly regulated river-floodplain systems, it has become necessary to implement localized, "managed" connection flows, made possible using floodplain irrigation infrastructure. These managed flows contrast with "natural", large-scale, overbank flood pulses. We compared the effects of a managed and a natural connection event on (i) the composition of the large-bodied fish community and (ii) the structure of an endangered catfish population of a large floodplain lake. The change in community composition following the managed connection was not greater than that exhibited between seasons or years during disconnection. By contrast, the change in fish community structure following the natural connection was much larger than that attributed to background, within-and between-year variability during disconnection. Catfish population structure only changed significantly following the natural flood. While the natural flood increased various population rates of native fishes, it also increased those of non-native carp, a pest species. To have a positive influence on native biodiversity, environmental flows may need to be delivered to floodplains in a way that simulates the properties of natural flood pulses. A challenge, however, will be managing river-floodplain connectivity to benefit native more than non-native species.Résumé : Pour rétablir la connectivité de réseaux fluviaux fortement régularisés de plaine inondable, il est devenu nécessaire de mettre en place des débits de connexion « gérés » localisés rendus possibles par les infrastructures d'irrigation dans la plaine inondable. Ces écoulements se distinguent des débordements transitoires « naturels » à grande échelle associés aux crues. Nous avons comparé les effets d'évènements de connexion géré, d'une part, et naturel, d'autre part, sur (i) la composition de la communauté de gros poissons et (ii) la structure d'une population menacée de barbues dans un grand lac de plaine inondable. La modification de la composition de la communauté après l'évènement de connexion géré n'était pas plus importante que la variabilité observée d'une saison à l'autre ou d'une année à l'autre en situation de déconnexion. En revanche, la modification de la structure de la communauté de poissons après l'évènement de connexion naturel était beaucoup plus importante que celle attribuable à la variabilité intersaisonnière et interannuelle de fond en situation de déconnexion. La structure de la population de barbues n'a changé de manière significative qu'après la crue naturelle. Si cette crue naturelle a entraîné une augmentation des taux de population de divers poissons indigènes, elle s'est également traduite par une augmentation du taux de population des carpes, une espèce parasite non indigène. Il se pourrait que, pour avoir une incidence positive sur la biodiversité indigène, les débits environnementaux dans les plaines inondables doivent simuler les propriétés des crues naturelles. L'un des défis que cela présente consiste à gérer la connectivité hydr...

show abstract

“…Tiffan et al. () showed that subyearlings delay downstream movement in these transitional habitats of Lower Granite Reservoir, which may increase the duration of their exposure to predators. Naughton et al.…”

mentioning

confidence: 99%

Juvenile Chinook Salmon Mortality in a Snake River Reservoir: Smallmouth Bass Predation Revisited

2018

Self Cite

View full text Add to dashboard Cite

Predation by nonnative fishes has been identified as a contributing factor in the decline of juvenile salmonids in the Columbia River basin. We examined the diet composition of Smallmouth Bass Micropterus dolomieu and estimated the consumption and predation loss of juvenile Chinook Salmon Oncorhynchus tshawytscha in Lower Granite Reservoir on the Snake River. We examined 4,852 Smallmouth Bass stomachs collected from shoreline habitats during April–September 2013–2015. Chinook Salmon were the second most commonly consumed fish by all size‐classes of Smallmouth Bass (≥150 mm TL) throughout the study. Over the 3 years studied, we estimated that a total of 300,373 Chinook Salmon were consumed by Smallmouth Bass in our 22‐km study area, of which 97% (291,884) were subyearlings (age 0) based on length frequency data. A majority of the loss (61%) occurred during June, which coincided with the timing of hatchery releases of subyearling fall Chinook Salmon. Compared to an earlier study, mean annual predation loss increased more than 15‐fold from 2,670 Chinook Salmon during 1996–1997 to 41,145 Chinook Salmon during 2013–2015 (in reaches that could be compared), despite lower contemporary Smallmouth Bass abundances. This increase can be explained in part by increases in Smallmouth Bass consumption rates, which paralleled increases in subyearling Chinook Salmon densities—an expected functional response by an opportunistic consumer. Smallmouth Bass are currently significant predators of subyearling Chinook Salmon in Lower Granite Reservoir and could potentially be a large source of unexplained mortality.

show abstract

Water Velocity, Turbulence, and Migration Rate of Subyearling Fall Chinook Salmon in the Free‐Flowing and Impounded Snake River

Cited by 37 publications

References 31 publications

Post‐release predation mortality of age‐0 hatchery‐reared Chinook salmon from non‐native smallmouth bass in the Snake River

Post‐release predation mortality of age‐0 hatchery‐reared Chinook salmon from non‐native smallmouth bass in the Snake River

Response of a floodplain fish community to river-floodplain connectivity: natural versus managed reconnection

Juvenile Chinook Salmon Mortality in a Snake River Reservoir: Smallmouth Bass Predation Revisited

Contact Info

Product

Resources

About