Extensive fecal cast production and growth of Vibrionaceae in heat-stressed Atlantic salmon post-smolts.

ABSTRACT: Atlantic salmon (Salmo salar) are known to reduce or cease voluntary feeding and show altered digesta consistency under heat stress. This study was performed to determine what bacterial species occur and to characterize bacterial taxa and quantify changes in gut microbial abundance under heat stress. Atlantic salmon (all female, 1.5 kg average weight) in seawater tanks at 15 °C were fed for 2 to 4 weeks. Tank temperatures were increased to a 19 °C "warm phase" until voluntary feeding abated at which point tank temperatures were cooled to 15 °C for 4 weeks. At the end of each temperature phase the fish were stripped of feces and microbiome profiles were determined using 16 S rRNA V1-V3 metabarcoding. The tank experiment was repeated three times in successive years. Abundances of bacteria we

SUBMITTER: Bowman JP 

PROVIDER: S-EPMC12594781 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature