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- W3082309907 abstract "Temperature affects many aspects of performance in poikilotherms, including how prey respond when encountering predators. Studies of anti-predator responses in fish mainly have focused on behaviour, whereas physiological responses regulated through the hypothalamic-pituitary-interrenal axis have received little attention. We examined plasma cortisol and mRNA levels of stress-related genes in juvenile brown trout (Salmo trutta) at 3 and 8 °C in the presence and absence of a piscivorous fish (burbot, Lota lota).A redundancy analysis revealed that both water temperature and the presence of the predator explained a significant amount of the observed variation in cortisol and mRNA levels (11.4 and 2.8%, respectively). Trout had higher cortisol levels in the presence than in the absence of the predator. Analyses of individual gene expressions revealed that trout had significantly higher mRNA levels for 11 of the 16 examined genes at 3 than at 8 °C, and for one gene (retinol-binding protein 1), mRNA levels were higher in the presence than in the absence of the predator. Moreover, we found interaction effects between temperature and predator presence for two genes that code for serotonin and glucocorticoid receptors.Our results suggest that piscivorous fish elicit primary stress responses in juvenile salmonids and that some of these responses may be temperature dependent. In addition, this study emphasizes the strong temperature dependence of primary stress responses in poikilotherms, with possible implications for a warming climate." @default.
- W3082309907 created "2020-09-08" @default.
- W3082309907 creator A5020040827 @default.
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- W3082309907 date "2020-08-28" @default.
- W3082309907 modified "2023-09-23" @default.
- W3082309907 title "Temperature and predator-mediated regulation of plasma cortisol and brain gene expression in juvenile brown trout (Salmo trutta)" @default.
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- W3082309907 doi "https://doi.org/10.1186/s12983-020-00372-y" @default.
- W3082309907 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7456031" @default.
- W3082309907 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32874189" @default.
- W3082309907 hasPublicationYear "2020" @default.
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