Using gene expression to identify the most suitable environmental conditions for growth and metabolism of juvenile deepwater redfish (Sebastes mentella) in the Estuary and the Gulf of St. Lawrence

Abstract Deepwater redfish Sebastes mentella will be among the most important resource-sustaining commercial bottom-fish fisheries in years to come Estuary and Gulf of St. Lawrence (EGSL). In 2011, 2012, 2013, three strong cohorts were recruited stock; their abundance 2018 was 80 times higher than that 1993–2012 period. The main goal this work deepen our knowledge growth regulation metabolism order identify molecular indicators determine how they are influenced by natural environmental conditions. Fish weight water temperature explained 11% variation relative mRNA levels specific gene targets liver muscle seven sites where deepwater captured EGSL. expression insulin-like factor-1 (igf-1) white A-chain lactate dehydrogenase (ldh-a) correlate positively with weight, whereas heavy chain myosin (myo), heart citrate synthase (cs), pyruvate kinase (pk) negatively. cytochrome c oxidase subunit 1 (cox-1) igf-1 receptor isoform a (igf-1ra) negatively temperature. from estuary smaller those caught at other sites. Since potential strongly correlated (being enhanced temperatures), study suggests an ecological advantage for species climate-warming context.