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- W3005129800 startingPage "2466" @default.
- W3005129800 abstract "Abstract Climate change is leading to altered temperature regimes which are impacting aquatic life, particularly for ectothermic fish. The impacts of environmental stress can be translated across generations through maternally derived glucocorticoids, leading to altered offspring phenotypes. Although these maternal stress effects are often considered negative, recent studies suggest this maternal stress signal may prepare offspring for a similarly stressful environment (environmental match). We applied the environmental match hypothesis to examine whether a prenatal stress signal can dampen the effects of elevated water temperatures on body size, condition, and survival during early development in Chinook salmon Oncorhynchus tshawytscha from Lake Ontario, Canada. We exposed fertilized eggs to prenatal exogenous egg cortisol (1,000 ng/ml cortisol or 0 ng/ml control) and then reared these dosed groups at temperatures indicative of current (+0°C) and future (+3°C) temperature conditions. Offspring reared in elevated temperatures were smaller and had a lower survival at the hatchling developmental stage. Overall, we found that our exogenous cortisol dose did not dampen effects of elevated rearing temperatures (environmental match) on body size or early survival. Instead, our eyed stage survival indicates that our prenatal cortisol dose may be detrimental, as cortisol‐dosed offspring raised in elevated temperatures had lower survival than cortisol‐dosed and control reared in current temperatures. Our results suggest that a maternal stress signal may not be able to ameliorate the effects of thermal stress during early development. However, we highlight the importance of interpreting the fitness impacts of maternal stress within an environmentally relevant context." @default.
- W3005129800 created "2020-02-14" @default.
- W3005129800 creator A5061850324 @default.
- W3005129800 creator A5074868234 @default.
- W3005129800 creator A5077059221 @default.
- W3005129800 creator A5088473393 @default.
- W3005129800 date "2020-02-08" @default.
- W3005129800 modified "2023-10-14" @default.
- W3005129800 title "Exposure to exogenous egg cortisol does not rescue juvenile Chinook salmon body size, condition, or survival from the effects of elevated water temperatures" @default.
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- W3005129800 doi "https://doi.org/10.1002/ece3.6073" @default.
- W3005129800 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7069292" @default.
- W3005129800 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32184994" @default.
- W3005129800 hasPublicationYear "2020" @default.
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