Hypoxia and High Temperature as Interacting Stressors: Will Plasticity Promote Resilience of Fishes in a Changing World?

Elevated temperatures reduce population‐specific transcriptional plasticity in developing lake sturgeon (Acipenser fulvescens)

“…Environmental changes are often occurring faster than organisms can adapt to increasing temperatures, especially in species with long generation times (Crozier & Hutchings, 2014; Logan & Cox, 2020; Morgan et al, 2020). Therefore, phenotypic plasticity will be critical for maintaining fitness in response to climate change and promoting survival in these changing environments (Burggren, 2018; Earhart et al, 2022; Scheiner et al, 2019).…”

“…Exposing developing fish to increasing environmental temperatures will thus alter traits that may have transient as well as long‐lasting physiological consequences. The basis for plasticity is variation in phenotypes produced by the same genotype under different environmental conditions (Earhart et al, 2022; Lafuente & Beldade, 2019). Acclimatory plasticity is especially important in early life to ensure sufficient phenotypic flexibility, enabling fishes to survive in variable environmental conditions until adulthood when their reproductive potential can be reached (Burggren, 2018).…”

The effect of temperature and acute hypoxia/hyperoxia exposure on swimming performance and kinematics of Freshwater Drum

“…Although there are published studies on temperature requirements, ecology, and growth dynamics of Freshwater Drum across the species' range (Wismer and Christie 1987;Wahl et al 1988;Rypel et al 2006;Jacquemin et al 2014Jacquemin et al , 2015Abner and Phelps 2018), other studies of swimming performance or bioenergetic responses to latitude, temperature, or flow rate for this species have not been published. As climate shifts continue to occur, changes in water temperature and DO are likely to interact to create stressful conditions to which fish populations may not have sufficient plasticity to adapt phenotypically or genetically (Earhart et al 2022). Further experiments-with both widely and narrowly distributed fishes-that explore limiting conditions of these factors alone and in combination are needed to predict the impact of climate change.…”

Integrated organismal responses induced by ecologically-relevantpCO2and temperature exposures in developing lake sturgeon

“…As climate change will lead to fishes developing in environments with higher thermal and hypercapnic baselines, we reasoned that increased p CO 2 and temperature exposure throughout early development could alter the capacity of aquatic organisms to tolerate a transient p CO 2 challenge. Multiple response directions are reasonable in this circumstance 20 : either fish exposed to a more stressful developmental environment would be more tolerant to a later p CO 2 challenge because they adusted their phenotypes during development, or the developmental environment decreased tolerance to the later challenge by reducing physiological capacity for responses 21,22 .…”