Skin and Blood Microbial Signatures of Sedentary and Migratory Trout (Salmo trutta) of the Kerguelen Islands

Our understanding of how microbiome signatures are modulated in wild fish populations remains poorly developed and has, until now, mostly been inferred from studies commercial farmed populations. Here, for the first time, we have studied changes skin blood microbiomes Salmo trutta population volcanic Kerguelen archipelago located at northern limit Antarctic Ocean. The Islands present a natural framework expansion reveal likely situation representing further climate change distribution areas. results showed that S. has signature distinct those salmonids Northern Hemisphere. study also revealed differ between sedentary migratory trutta. While 18 phyla were shared both groups trout, independent compartment, 6 unique to trout. Further analyses undergo significant site-specific variations correlate, some cases, with peculiarity specific ecosystems. presence potential pathogens particular sites impact abiotic factors on microbiome, most notably due nature environment. This contributes better modulate It will help monitor impacts colonization process sub-Antarctic region.