Shifting seas and first feeds: gut microbiome dynamics in juvenile chum salmon (<i>Oncorhynchus keta</i>) and their climate vulnerability.

ABSTRACT:

Background

The early development of host-associated microbiota is crucial for host health and resilience. In migratory fish like chum salmon, the transition from freshwater to seawater and the onset of feeding are critical life stages that may be susceptible to environmental stressors, including those related to climate change. However, the relative influence of diet versus environment on microbiome stabilization remains unclear under ecologically relevant conditions. This study investigated the dynamics of gut bacterial communities in juvenile chum salmon during the first 90 days post-hatching, exploring how first feeding and freshwater-to-seawater transition shape the gut microbiota, with implications for climate sensitivity.

Results

High-throughput 16S rRNA gene amplicon

SUBMITTER: Ghosh SK 

PROVIDER: S-EPMC12355085 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature