Influence of beaver mimicry restoration on habitat availability for fishes, including Arctic grayling (<i>Thymallus arcticus</i>)

Albertson, Lindsey K.; Ouellet, Valérie; Reinert, J. Holden; Korb, Nathan; Jaeger, Matthew E.

doi:10.1002/aff2.30

Cited by 1 publication

(4 citation statements)

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“…Alternatively, if environmental conditions permit water stratification, fish will often seek colder water pools that serve as thermal refugia (Baird and Krueger 2003;Goyer et al 2014). However, anthropogenic activities, which often modify the environment, make it difficult for fish to rely on the aforementioned strategies (Hall et al 2011;Albertson et al 2022). Exposure to warmer water then induces heat stress in the fish (Alfonso et al 2021).…”

Section: Impact Statementmentioning

confidence: 99%

“…There are several biotic factors threatening the Arctic Grayling overall, including loss of habitat and refugia, competition from introduced species, and water pollution (Kaya 1992;Lamothe and Peterson 2007;Peterson et al 2009;Hodge 2021;Albertson et al 2022). However, the factor of most concern affecting the distribution and survival of Arctic Grayling in the future is the likely increases in water temperatures where they reside (Lohr et al 1996;Goble et al 2021;Tingley et al 2022).…”

Section: Impact Statementmentioning

confidence: 99%

“…2011; Albertson et al. 2022). Exposure to warmer water then induces heat stress in the fish (Alfonso et al.…”

Section: Introductionmentioning

confidence: 99%

“…2009; Hodge 2021; Albertson et al. 2022). However, the factor of most concern affecting the distribution and survival of Arctic Grayling in the future is the likely increases in water temperatures where they reside (Lohr et al.…”

Section: Introductionmentioning

confidence: 99%

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Effect of temperature on growth, survival, and chronic stress responses of Arctic Grayling juveniles

Carrillo‐Longoria,

Gaylord,

Andrews

et al. 2023

Trans Am Fish Soc

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ObjectiveArctic Grayling Thymallus arcticus are Holarctically distributed, with a single native population in the conterminous United States occurring in the Big Hole River, Montana, where water temperatures can fluctuate throughout the year from 8°C to 18°C. A gradual increase in mean water temperature has been reported in this river over the past 20 years due to riparian habitat changes and climate change effects. We hypothesized that exposing Arctic Grayling to higher temperatures would result in lower survival, decreased growth, and increased stress responses.MethodsOver a 144‐day trial, Arctic Grayling juveniles were subjected to water temperatures ranging from 8°C to 26°C to measure the effects on growth, survival, gene expression, and antioxidant enzyme activity.ResultFish growth increased with increasing water temperature up to 18°C, beyond which survival was reduced. Fish did not survive at temperatures above 22°C. In response to temperatures above 16°C, 3.0‐fold and 1.5‐fold increases in gene expression were observed for superoxide dismutase (SOD) and glutathione peroxidase (GPx), respectively, but no changes were seen in the gene expression ratio of heat shock protein 70 to heat shock protein 90. Activities of the SOD and GPx enzymes also rose at temperatures above 16°C, indicating heightened oxidative stress. Catalase gene expression and enzyme activity decreased with rising temperatures, suggesting a preference for the GPx pathway, as GPx could also be providing help with lipid peroxidation. An increase in thiobarbituric acid reactive substances was also recorded, which corresponded with rising temperatures.ConclusionOur findings thus underscore the vulnerability of Arctic Grayling to minor changes in water temperature. Further increases in mean water temperature could significantly compromise the survival of Arctic Grayling in the Big Hole River.

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