期刊
EVOLUTIONARY APPLICATIONS
卷 7, 期 2, 页码 286-300出版社
WILEY
DOI: 10.1111/eva.12119
关键词
climate change; ecological genomics; Oncorhynchus gorbuscha; Oncorhynchus nerka; premature mortality; spawning migration
资金
- NSERC PGS-D
- UBC-UGF scholarships
- NSERC
- Genome BC
Characterizing the cellular stress response (CSR) of species at ecologically relevant temperatures is useful for determining whether populations and species can successfully respond to current climatic extremes and future warming. In this study, populations of wild-caught adult pink (Oncorhynchus gorbuscha) and sockeye (Oncorhynchus nerka) salmon from the Fraser River, British Columbia, Canada, were experimentally treated to ecologically relevant cool' or warm' water temperatures to uncover common transcriptomic responses to elevated water temperature in non-lethally sampled gill tissue. We detected the differential expression of 49 microarray features (29 unique annotated genes and one gene with unknown function) associated with protein folding, protein synthesis, metabolism, oxidative stress and ion transport that were common between populations and species of Pacific salmon held at 19 degrees C compared with fish held at a cooler temperature (13 or 14 degrees C). There was higher mortality in fish held at 19 degrees C, which suggests a possible relationship between a temperature-induced CSR and mortality in these species. Our results suggest that frequently encountered water temperatures 19 degrees C, which are capable of inducing a common CSR across species and populations, may increase risk of upstream spawning migration failure for pink and sockeye salmon.
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