Circadian regulation of diel vertical migration (DVM) and metabolism in Antarctic krill Euphausia superba.

ABSTRACT: Antarctic krill (Euphausia superba) are high latitude pelagic organisms which play a key ecological role in the ecosystem of the Southern Ocean. To synchronize their daily and seasonal life-traits with their highly rhythmic environment, krill rely on the implementation of rhythmic strategies which might be regulated by a circadian clock. A recent analysis of krill circadian transcriptome revealed that their clock might be characterized by an endogenous free-running period of about 12-15 h. Using krill exposed to simulated light/dark cycles (LD) and constant darkness (DD), we investigated the circadian regulation of krill diel vertical migration (DVM) and oxygen consumption, together with daily patterns of clock gene expression in brain and eyestalk tissue. In LD, we found clear 24 h rhythm

SUBMITTER: Piccolin F 

PROVIDER: S-EPMC7546626 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature