Artificial light at night interacts with predatory threat to alter reef fish metabolite profiles

Light cycles and predatory threat define activity patterns (e.g. feeding/sleeping, activity/rest) in most diurnal fish species. Artificial light at night (ALAN) may disrupt natural biochemical processes, a mismatch which can eventually reduce condition fitness. We evaluate the separate joint effects of ALAN predator on metabolism within brain, liver muscle tissue common, wild caught damselfish, blue green chromis (Chromis viridis). The varied according to type exposure. In all tissues we observed changes metabolic pathways associated with increased under continuous (despite provision shelter), specifically those energy metabolism, cell signalling, responses oxidative stress markers cellular damage. both brain tissues, served moderate influence change, likely due sheltering behaviour. However, no interaction was tissue. Our results highlight complex sub-acute exposure specific whole organism metabolism. Collectively these indicate that has significant scope fitness coastal fishes potentially threaten ecosystem services, but are highly be altered by biotic drivers activity.