Seasonal Variation of Critical Thermal Maximum in the Redbelly Dace, Phoxinus erythrogaster (Cyprinidae)

Temperature effects on performance and physiology of two prairie stream minnows

“…2) then stonerollers appear to have higher CTMs than dace under summer temperature conditions that are more typical of intermediate-sized streams. The range of CTM values we observed across acclimation treatments align well with what is already reported for both species under natural conditions (Scott, 1987; Mundahl, 1990). However, the lack of difference in CTMs between species at some acclimation temperatures suggests thermal tolerance alone is likely not a strong predictor of species distribution.…”

“…Both species function in similar trophic roles, feeding primarily on algae (Bertrand and Gido, 2007). The critical thermal maximum (CTM) of the dace varies seasonally between ~17 and 32°C, while the stoneroller exhibits CTM as high as 38°C (Scott, 1987; Mundahl, 1990). Stoneroller and dace often co-occur in very small streams, but the occurrence of dace rapidly diminishes moving downstream, while stoneroller populations persist (Kansas Fishes Committee, 2014).…”

Habitat Use by Fishes in Groundwater-Dependent Streams of Southern Oklahoma

“…Future impacts may also result from climate change, which is expected to have negative impacts on freshwater ecosystems (Carpenter et al, 1992), especially those species that require cooler temperatures (Rahel et al, 1996). Springs provide thermal refuges from the higher temperatures of mainstem rivers, where maximum temperatures may exceed maximum temperature tolerances of some spring-dependent species like Phoxinus erthyrogaster (Scott, 1987). The east-west orientation of major river systems in the Great Plains limits the ability of species to migrate and escape elevated temperatures with climate change (Matthews and Zimmerman, 1990).…”

Seasonal differences in thermal stress susceptibility of diploid and triploid brook trout, Salvelinus fontinalis (Teleostei, Pisces)

“…Due to the described periodicity of different physiological processes, it may be hypothesized that also temperature tolerance of teleost fish differs seasonally in accordance to intrinsic rhythms. Seasonality in temperature tolerance has been described for wild fish in several studies (killifish, Fundulus hertoclitus – Bulger & Tremaine, 1985; redbelly dace, Phoxinus erythrogaster – Scott, 1987, redside dace, Clinostomus elongates – Leclair et al ., 2020). In wild fish, this is a result of daily and seasonal temperature oscillations leading to plasticity in acclimation temperature (Bulger & Tremaine, 1985; Leclair et al ., 2020; Filatova et al ., 2019).…”