“…A handful of studies on fish of wild origin is available from marine environments (e.g. Gourtay et al, 2020), where access to dietary n − 3 LC-PUFA is rarely a limiting factor for consumers (Colombo et al, 2017). The tissue content of n − 3 LC-PUFA determines numerous cellular processes in ectotherms, including functioning of mitochondrial metabolism (Martin et al, 2013;Salin et al, 2021), which limits the performance of organs and the whole organism (Dawson, Alza, et al, 2020;Salin et al, 2015), including their thermal performance (Salin et al, 2015).…”