ULTRADIAN OSCILLATION IN THE HEART-RATE OF RAINBOW-TROUT (ONCORHYNCHUS-MYKISS)

L DEVERA, Imants George Priede

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

1. Ultradian oscillations in the min and hr range on long-tem (24-hr) computerized recordings of heart rate in rainbow trout Oncorhynchus mykiss, acclimated to 5, 10 and 15-degrees-C water temperature, were investigated. Eight-hour duration time series derived from the heart mte recordings were analysed for their harmonic content in the ultradian band by spectral analysis.

2. A significant ultradian rhythm at around 0.011 cycles/min (approximately 91-min period) was detected in the power spectral density functions of all the 8-hr duration time series derived from the heart rate recordings at the three experimental water temperatures.

3. The spectral power of the ultradian oscillation detected in heart rate of trout was found to increase significantly with increasing temperature.

4. The possible endogenous origin of the ultradian rhythm detected in heart rate of Oncorhynchus mykiss is discussed.

Original languageEnglish
Pages (from-to)183-186
Number of pages4
JournalComparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology
Volume106
Issue number2
Publication statusPublished - Oct 1993

Keywords

  • BLOOD-PRESSURE
  • RHYTHMS
  • TELEMETRY
  • BEHAVIOR
  • DOGS
  • WILD

Cite this

ULTRADIAN OSCILLATION IN THE HEART-RATE OF RAINBOW-TROUT (ONCORHYNCHUS-MYKISS). / DEVERA, L ; Priede, Imants George.

In: Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, Vol. 106, No. 2, 10.1993, p. 183-186.

Research output: Contribution to journalArticle

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N2 - 1. Ultradian oscillations in the min and hr range on long-tem (24-hr) computerized recordings of heart rate in rainbow trout Oncorhynchus mykiss, acclimated to 5, 10 and 15-degrees-C water temperature, were investigated. Eight-hour duration time series derived from the heart mte recordings were analysed for their harmonic content in the ultradian band by spectral analysis.2. A significant ultradian rhythm at around 0.011 cycles/min (approximately 91-min period) was detected in the power spectral density functions of all the 8-hr duration time series derived from the heart rate recordings at the three experimental water temperatures.3. The spectral power of the ultradian oscillation detected in heart rate of trout was found to increase significantly with increasing temperature.4. The possible endogenous origin of the ultradian rhythm detected in heart rate of Oncorhynchus mykiss is discussed.

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KW - RHYTHMS

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