Effect of acclimation on thermal limits and hsp70 gene expression of the New Zealand sea urchin Evechinus chloroticus

Acclimation to higher temperature and antioxidant supplemented diets improved rainbow trout (Oncorhynchus mykiss) resilience to heatwaves

“…At the 30 °C shock, fish were likely in such a poor condition that the HSP expression was down-regulated again or suppressed in favor to conserve energy for basic physiological functions and ensure survival 38 . Our results were consistent with previous studies on rainbow trout 21 , lake trout ( Salvelinus namaycush ) 2 and sea urchin ( Evechinus chloroticus ) 30 . Jiang et al 7 also reported that acclimation of rainbow trout juveniles to a high temperature (22 °C) over a longer period (9 d) lowered the expression of HSP genes compared to fish experienced shorter acclimation time (0–6 days).…”

“…The supra-optimal temperature acclimation was more effective in survival than supplements. This finding aligns with a range of studies in other species including rainbow trout 7 , 35 , Atlantic salmon 9 , stripped bass 36 , European seabass 3 , and aquatic invertebrates 30 . For instance, higher rates of survival were observed in European seabass reared at 16 °C and 24 °C compared to 8 °C and 32 °C and temperature ranges between 16 and 24 °C provided optimum conditions for high survival and good growth performance 3 .…”

Distinct interspecific and intraspecific vulnerability of coastal species to global change

“…This mirrors findings of Nielsen, Henriques, et al (2020), who found that the urchin showed selection signals from a combination of variables, compared to the strong selection patterns from solely SSS or SST, shown by the crab and limpet, respectively. We expected the urchin to be the least influenced by atmospheric variables, as it has the lowest rocky shore zonation of the three species, and as many studies indicate that sea temperature is highly important in urchin behaviour and physiology (Branco et al, 2013; Brothers & McClintock, 2015; Delorme et al, 2020; Pérez‐Portela et al, 2020; Zhang et al, 2017). Our finding of air temperature being more important in the urchin SDMs could be driven by multiple factors, such as this environmental feature being an important driver of other species in which the urchin is ecologically linked to, or minimum temperature being highly correlated to an environmental variable directly influencing the urchin's biology but not included in the model, or due to biases from the spatial resolution and occurrence points (Smith & Santos, 2020).…”

“…shown by the crab and limpet, respectively. We expected the urchin to be the least influenced by atmospheric variables, as it has the lowest rocky shore zonation of the three species, and as many studies indicate that sea temperature is highly important in urchin behaviour and physiology (Branco et al, 2013;Brothers & McClintock, 2015;Delorme et al, 2020;Pérez-Portela et al, 2020;Zhang et al, 2017).…”

Analysis of the physiological responses of Pacific abalone (Haliotis discus hannai) to various stressors to identify a suitable stress indicator

“…Several studies have revealed changes in the expression of HSP families according to environmental stress in various marine invertebrates such as Pacific oyster Crassostrea gigas (Hamdoun et al, 2003), Antarctic sea urchin, Sterechinus neumayeri (González et al, 2016), marine mussel Perna canaliculus (Delorme, Biessy, et al, 2020). Delorme, Frost, and Sewell (2020) examined the expression of HSP70 by subjecting New Zealand sea urchin Evechinus chloroticus to high‐temperature treatment for each exposed period and reported that HSP70 is related to high‐temperature adaptation. HSP70 and HSP90 expression because of water temperature shock or rapid toxicity also has been reported in abalone (Farcy et al, 2007; Li et al, 2012; Liu et al, 2011).…”