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.
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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.
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.
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.
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.
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.
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.
Fingerman, S.W. 1976. Circadian rhythm of brain 5-hydroxytryptamine and swimming activity in the teleost,Fundulus grandis. Comp. Biochem. Physiol. 54C: 49–54.
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.
Kavaliers, M. 1979. Pineal involvement in the control of circadian rhythmicity in the lake chub,Covesius plumbius. J. Exp. Zool. 209: 33–40.
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.
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.
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.
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.
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.
Reiter, R.J. 1979. The Pineal, Vol. 3. Eden Press, Montreal.
Sauerbier, I. and Meyer, W. 1977. Circadian rhythms in catecholamine concentration in organs of common goldfish (Carassius auratus). Comp. Biochem. Physiol. 57C: 117–120.
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.
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.
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Khan, I.A., Joy, K.P. Diurnal variations in hypothalamic monoamine levels in the teleostChanna punctatus (bloch) in response to melatonin under two photothermal conditions. Fish Physiol Biochem 5, 187–190 (1988). https://doi.org/10.1007/BF01874795
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DOI: https://doi.org/10.1007/BF01874795