Endogenous circadian rhythm in the river puffer fish Takifugu obscurus

Abstract

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 153:293-298 (1997) - doi:10.3354/meps153293 Endogenous circadian rhythm in the river puffer fish Takifugu obscurus Kim WS, Kim JM, Yi SK, Huh HT Oxygen consumption rate of 8 to 12 mo old river puffer fish Takifugu obscurus was determined using an automatic intermittent-flow-respirometer (AIFR). During the experiments, the fish were not fed and were kept in constant darkness and at constant temperature to avoid any extrinsic disturbances. It was clearly demonstrated that this species has a strong endogenous circadian rhythm in its instantaneous rates of oxygen consumption, although there were weak minor peaks of 11.4 to 11.7 h intervals. This endogenous rhythm appeared to be independent of the number of fish in the experimental chamber. The endogenous rhythm in the oxygen consumption rate observed in the present study may have profound implications for the physiological processes and biological rhythms of this species, and could also be a good reference in determining the oxygen consumption rates of other aquatic organisms. Endogenous circadian rhythm · Oxygen consumption · River puffer fish · Takifugu obscurus Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 153. Publication date: July 10, 1997 Print ISSN:0171-8630; Online ISSN:1616-1599 Copyright © 1997 Inter-Research.