Cold-Water Fishes and Climate Change in North America

Williams, Jack E.; Isaak, Daniel J.; Imhof, Jack; Hendrickson, Dean A.; McMillan, John

doi:10.1016/b978-0-12-409548-9.09505-1

Cited by 33 publications

(27 citation statements)

References 61 publications

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“…Brown trout (Salmo trutta fario) is one of the native species of European salmonids and is an endemic inhabitant of Austrian rivers [1], while the rainbow trout (Oncorhynchus mykiss) has been broadly introduced from North America for farming purpose [2]. In the last several years, a decrease in brown trout populations has been reported in rivers in the Alpine region, including Austria, and repopulation efforts have proven insufficient to stop this downward trend [3].…”

Section: Introductionmentioning

confidence: 99%

Renibacterium salmoninarum and Mycobacterium spp.: two bacterial pathogens present at low levels in wild brown trout (Salmo trutta fario) populations in Austrian rivers

et al. 2020

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Background: Renibacterium salmoninarum and Mycobacterium sp. are important bacterial pathogens of fish. R. salmoninarum is the causative agent of bacterial kidney disease, a Gram-positive bacterium mostly known for causing chronic infections in salmonid fish, while multiple species belonging to the Mycobacterium genus have been associated with mycobacteriosis in fish as well as in human. The objective of this study was to determine the prevalence of these two bacterial pathogens in populations of wild brown trout (Salmo trutta fario) in four rivers (Kamp, Wulka, Traun and Ybbs) in Austria. Results: A total of 457 kidney samples were examined for both bacterial agents using nested and conventional PCR as well as bacterial cultivation on KDM-2, histological examination and immunohistochemistry. Molecular evidence showed an estimated prevalence level of 0.94% for R. salmoninarum in 2017 while the bacterium could not be detected in 2018 and histology showed signs consistent with a low-level chronic inflammation in the kidney of infected fish. Similarly, no fish were found positive for Mycobacterium in 2017 but in 2018, the prevalence was found to be 37.03% in the Kamp river (4.08% across all rivers). The sequencing data confirmed that these fish carried Mycobacterium sp. although the precise species of Mycobacterium could not be ascertained. Conclusions: This survey constitutes the first insight into the prevalence rate of R. salmoninarum and Mycobacterium sp. in wild brown trout (Salmo trutta fario) populations in Austria. Both of these pathogens were only detected in the summer months (June and July), which might suggest that the stress linked to increased water temperature could act as stressor factor and contribute to the outbreak of these diseases. The age of the fish might also play a role, especially in the case of Mycobacterium sp. as all the infected fish were in their first summer (June).

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Section: Introductionmentioning

confidence: 99%

Renibacterium salmoninarum and Mycobacterium spp.: two bacterial pathogens present at low levels in wild brown trout (Salmo trutta fario) populations in Austrian rivers

et al. 2020

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“…Comte et al, 2013;RuizNavarro et al, 2016). These changes may have an especially strong effect on cold-water fish, which have been shown to be very sensitive to climate warming (Williams et al, 2015;Santiago et al, 2016). For example, among salmonids, DeWeber and Wagner (2015) found stream temperature to be the most important determinant of the probability of occurrence of brook trout, Salvelinus fontinalis (Mitchill, 1814).…”

Section: Introductionmentioning

confidence: 99%

Waning habitats due to climate change: the effects of changes in streamflow and temperature at the rear edge of the distribution of a cold-water fish

Saez

Muñoz‐Mas²,

Solana‐Gutiérrez³

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. Climate changes affect aquatic ecosystems by altering temperatures and precipitation patterns, and the rear edges of the distributions of cold-water species are especially sensitive to these effects. The main goal of this study was to predict in detail how changes in air temperature and precipitation will affect streamflow, the thermal habitat of a cold-water fish (the brown trout, Salmo trutta), and the synergistic relationships among these variables at the rear edge of the natural distribution of brown trout. Thirty-one sites in 14 mountain rivers and streams were studied in central Spain. Models of streamflow were built for several of these sites using M5 model trees, and a non-linear regression method was used to estimate stream temperatures. Nine global climate models simulations for Representative Concentration Pathways RCP4.5 and RCP8.5 scenarios were downscaled to the local level. Significant reductions in streamflow were predicted to occur in all of the basins (max. −49 %) by the year 2099, and seasonal differences were noted between the basins. The stream temperature models showed relationships between the model parameters, geology and hydrologic responses. Temperature was sensitive to streamflow in one set of streams, and summer reductions in streamflow contributed to additional stream temperature increases (max. 3.6 • C), although the sites that are most dependent on deep aquifers will likely resist warming to a greater degree. The predicted increases in water temperatures were as high as 4.0 • C. Temperature and streamflow changes will cause a shift in the rear edge of the distribution of this species. However, geology will affect the extent of this shift. Approaches like the one used herein have proven to be useful in planning the prevention and mitigation of the negative effects of climate change by differentiating areas based on the risk level and viability of fish populations.

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“…A large number of studies have illustrated that water temperature can drive metabolic effects on growth, body mass, swimming capacity, and reproductive success of fish (Coulter, Höök, Mahapatra, Guffey, & Sepúlveda, 2015;Donelson, McCormick, Booth, & Munday, 2014;Elliott & Hurley, 1997;Jonsson, Jonsson, & Finstad, 2013;Pauly, 1980), influence interspecific competition (e.g., Fausch & White, 1981;Wagner, Deweber, Detar, & Sweka, 2013), and alter diet preferences (e.g., Hammock & Johnson, 2014;Hidalgo & Alliot, 1988). Despite the recognized importance of thermal regimes on aquatic organisms and their distributions (e.g., Caissie, 2006;Williams, Isaak, Imhof, Hendrickson, & McMillan, 2015), few studies have investigated how specific recognized thermal microhabitats in pools vary in their thermal value within river systems. Nor have studies investigated how landscape-level or in-channel hydrogeomorphic parameters influence thermal characteristics of these pool habitats and the role that this complexity plays in providing population resiliency to thermal stresses (e.g., Isaak et al, 2009;Torgersen, Rice, & Iram, 1999).…”

Section: Introductionmentioning

confidence: 99%

Riparian and geomorphic controls on thermal habitat dynamics of pools in a temperate headwater stream

et al. 2017

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Stream pools serve as habitat for diverse communities composed of microbes, macroinvertebrates, and fish. Every pool presents a combination of geomorphological features, and each pool habitat hosts a unique community. These communities are tied to the physical characteristics of their habitat, especially water temperature. The effects of geomorphology and hydraulic variables on thermal habitat dynamics in pools are not well understood. In this study, the thermal regime in important stream pool habitats was investigated in relation to their riparian and geomorphological features. Our results indicate that instream wood, groundwater resurgence, and depth can locally modify the pool thermal habitat and increase thermal buffering capacity during heat‐stress events. Our findings highlight the importance of riparian vegetation and in‐channel hydrogeomorphic features in controlling pool thermal habitats.

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Cold-Water Fishes and Climate Change in North America

Cited by 33 publications

References 61 publications

Renibacterium salmoninarum and Mycobacterium spp.: two bacterial pathogens present at low levels in wild brown trout (Salmo trutta fario) populations in Austrian rivers

Renibacterium salmoninarum and Mycobacterium spp.: two bacterial pathogens present at low levels in wild brown trout (Salmo trutta fario) populations in Austrian rivers

Waning habitats due to climate change: the effects of changes in streamflow and temperature at the rear edge of the distribution of a cold-water fish

Riparian and geomorphic controls on thermal habitat dynamics of pools in a temperate headwater stream

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