Circadian rhythm in turbot (Scophthalmus maximus): daily variation of blood metabolites in recirculating aquaculture systems.

"Declarations Conflict of interestThe authors declare no competing interests. Ethical approvalThe entire research (farming the fish, taking samples, etc.) will be conducted in a most gentle manner while at the same time having respect to the animal and related work. All participants within the study group will adhere to the most stringent ethic protocols for scientific work while also taking local and national regulations of every participating country into account. Conflict of interest The authors declare no competing interests."

"Funding Open Access funding enabled and organized by Projekt DEAL. Open Access funding enabled and organized by Projekt DEAL. The study was part of the GAIN2020 project funded by the European Union’s Horizon 2020 research and innovation program under grant agreement No. 773330 and was supported by the research program “Changing Earth—Sustaining our Future” in the program-oriented funding periods (PoF IV subtopic 4.3 and subtopic 6.2) of the Helmholtz Association."