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Fish Physiology and Biochemistry

, Volume 5, Issue 4, pp 187–190 | Cite as

Diurnal variations in hypothalamic monoamine levels in the teleostChanna punctatus (bloch) in response to melatonin under two photothermal conditions

  • I. A. Khan
  • K. P. Joy
Article

Abstract

Hypothalamic dopamine (DA), noradrenaline (NA) and 5-hydroxytryptamine (5-HT) levels exhibited marked day-night variations under ambient photoperiod and temperature (12L∶12D; 17±1°C) with peak values at mid-light phase. The 16L∶8D; 22±1°C treatment reversed the diurnal rhythm of 5-HT, but not that of DA and NA. However, there was an overall increase in the levels of the catecholamines on exposure to the long photoperiod and high temperature. The administration of melatonin in the fish held on 16L∶8D; 22±1°C regime restored the 5-HT rhythm to that of the 12L∶12D; 17±1°C control group, but with elevated mid-photophase value. However, there was no effect of the indole treatment on the 5-HT rhythm under the 12L∶12D; 17±1°C regime. Melatonin causes a significant reduction of NA level in both the groups, while DA level did not change in either group.

Key words

melatonin photoperiod temperature diurnal variation dopamine noradrenaline 5-hydroxytryptamine 

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References cited

  1. Abo-Hagab, S. and Hanke, W. 1981. Changes in catecholamine content of the hypothalamus during adaptation of fish to changed external salinity. Gen. Comp. Endocrinol. 44: 324–334.PubMedGoogle Scholar
  2. Blask, D.E. 1981. Potential sites of action of pineal hormones within the neuroendocrine-reproductive axis.In The Pineal Gland, Vol. 11. Reproductive Effects. pp. 189–216. Edited by R.J. Reiter, CRC Press, Florida.Google Scholar
  3. Cox, R.H. Jr. and Perhach, J.L. Jr. 1973. A sensitive, rapid and simple method for the simultaneous spectrophotofluoremetric determination of norepinephrine, dopamine, 5-hydroxytryptamine and 5-hydroxyindoleacetic acid in discrete areas of brain. J. Neurochem. 20: 1777–1780.PubMedGoogle Scholar
  4. De Vlaming, V. and Olcese, J. 1981. The pineal gland in reproduction in fish, amphibians and reptiles.In The Pineal Gland, Vol. II. Reproductive Effects. pp. 2–29. Edited by R.J. Reiter, CRC Press, Florida.Google Scholar
  5. Delahunty, G., Bauer, G., Prack, M. and De Vlaming, V. 1978. Effects of pinealectomy and melatonin treatment on liver and plasma metabolites in the goldfish.Carassius auratus. Gen. Comp. Endocrinol. 35: 99–109.PubMedGoogle Scholar
  6. Elhalawani, M.E., Burke, W.H. and Ogren, L.A. 1978. Effects of drugs that modify brain monoamine concentrations on photoperiodically-induced testicular growth in coturnix quail (Coturnix coturnix japonica). Biol. Reprod. 18: 198–203.PubMedGoogle Scholar
  7. Fingerman, S.W. 1976. Circadian rhythm of brain 5-hydroxytryptamine and swimming activity in the teleost,Fundulus grandis. Comp. Biochem. Physiol. 54C: 49–54.Google Scholar
  8. Hontele, A. and Peter, R.E. 1980. Effect of pinealectomy, blinding and sexual condition on serum gonadotropin levels in the goldfish. Gen. Comp. Endocrinol. 40: 168–179.PubMedGoogle Scholar
  9. Kavaliers, M. 1979. Pineal involvement in the control of circadian rhythmicity in the lake chub,Covesius plumbius. J. Exp. Zool. 209: 33–40.Google Scholar
  10. Khan, I.A. and Joy, K.P. 1987. Diurnal variations in, and effect of long photoperiod-raised temperature and melatonin on hypothalamic monoamine oxidase activity in the teleostChanna punctatus. J. Interdisc. Cycle Res. 18: 287–292.Google Scholar
  11. Le Bras, Y.M. 1984. Circadian variation of catecholamine levels in brain, heart and plasma in the eel,Anguilla anguilla at three times of the year. Gen. Comp. Endocrinol. 55: 472–479.PubMedGoogle Scholar
  12. Olcese, J.M. and De Vlaming, V. 1980. Interaction of environmental photoperiod and temperature on hypothalamic monoamine oxidase activity inCarussius auratus. L. Comp. Biochem. Physiol. 66A: 153–155.Google Scholar
  13. Olcese, J., Darr, C., Demuri, B., Hall, T. and De Vlaming, V. 1980. Photoperiod effects on hypothalamic serotonergic activity in the goldfish,Carassius auratus. Comp. Biochem. Physiol. 66A: 363–365.Google Scholar
  14. Olcese, J., Hall, T.R., Figueroa, H.R. and De Vlaming, V. 1981. Pinealectomy and melatonin effects on daily variation of hypothalamic serotonergic system in the goldfish. Comp. Biochem. Physiol. 70A: 69–72.Google Scholar
  15. Reiter, R.J. 1979. The Pineal, Vol. 3. Eden Press, Montreal.Google Scholar
  16. Sauerbier, I. and Meyer, W. 1977. Circadian rhythms in catecholamine concentration in organs of common goldfish (Carassius auratus). Comp. Biochem. Physiol. 57C: 117–120.Google Scholar
  17. Vollrath, L. 1981. The Pineal Organ.In Handbuch der mikroscopischen Anatomie des Menschen, VI/7. pp. 1–665. Edited. by A. Oksche and Z. Vollrath. Springer-Verlag, Boston Heidelberg, New York.Google Scholar
  18. Yates, C.A. and Herbert, J. 1976. Differential circadian rhythms in pineal and hypothalamic 5-HT induced by artificial photoperiod and melatonin. Nature, Lond. 262: 219–220.Google Scholar

Copyright information

© Kugler Publication 1988

Authors and Affiliations

  • I. A. Khan
    • 1
  • K. P. Joy
    • 1
  1. 1.Centre of Advanced Study in ZoologyBanaras Hindu UniversityVaranasiIndia

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