Do thyroid and testis modulate the effects of pineal and melatonin on haemopoietic variables in Clarias batrachus.
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Date
1996-12
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Abstract
Involvement of pineal and its major hormone, melatonin, in the process of erythropoiesis
in a freshwater catfish, Clarias batrachus has been investigated. The study was
conducted during four phases, namely preparatory phase, spawning phase, postspawning phase
and late postspawning phase of its annual reproductive cycle. During each phase a fish received
either melatonin injections or subjected to pinealectomy. In addition, each fish in all the groups,
received either iopanoic acid or cyproterone acetate or vehicle in the morning or late afternoon.
Results clearly indicate that melatonin stimulates the rate of erythropoiesis in Clarias batrachus.
It appears that the extent of stimulation depends upon the phase of the annual reproductive cycle.
However, in general, the pineal- or melatonin-induced modulation of blood variables is gonad
dependent and thyroid seems to play a time of the day dependent subtle role.
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Keywords
Haemopoiesis;melatonin, pinealectomy, iopanoic acid, cyproterone acetate, catfish
Citation
Shedpure Maya, Pati Atanu Kumar. Do thyroid and testis modulate the effects of pineal and melatonin on haemopoietic variables in Clarias batrachus. Journal of Biosciences. 1996 Dec; 21(6): 797-808.