Embryonic Temperature Influences the Mucosal Responses of Atlantic Salmon Alevins to a Bacterial Challenge.

ABSTRACT: The present work investigated the effects of embryonic temperature on the responses of Atlantic salmon (Salmo salar) alevins to a bacterial challenge using Yersinia ruckeri as a model pathogen. Embryos were reared at 4 °C, 6 °C, and 8 °C from fertilization to the eyed-egg stage. Alevins, before the start of feeding, were challenged with the pathogen, and mortality and early immune responses in mucosal organs were assessed. Fish from the 4 °C and 6 °C groups exhibited higher survival probabilities than those from the 8 °C group 72 h post-infection. Mild histopathological changes were observed in the gills and skin across all temperature groups, with bacterial antigen detected in the secondary lamellae of gills and in the skin epithelial and basal layers. Gene expression profiling revealed s

SUBMITTER: Malik MS 

PROVIDER: S-EPMC11576808 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature