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Effects of varied photoperiods on rhythmic activity of thyroid gland in a teleost,Mystus vittatus (bloch)

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Résumé

La glande tyroide duMsytus vittatus sous photoperiodes normales montre des variations cycliques saisonnières: Au cours d'un an il y eut 2 phases d'activité tyroidale augmentée et chacune fut séparée par 1 phase de repos. Sous illumination prolongée le type de variations resta identique; sauf les phases de repos furent enregistrées 2 mois plus tôt que la normale. Ce plan rythmique d'activités disparut dans une obscurité totale et l'activité tyroidale demeura a un niveau élevé toute l'année.

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  1. Department of Zoology, University of Udaipur, Rajasthan, India

    T. P. Singh

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  1. T. P. Singh
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Singh, T.P. Effects of varied photoperiods on rhythmic activity of thyroid gland in a teleost,Mystus vittatus (bloch). Experientia 24, 93–94 (1968). https://doi.org/10.1007/BF02136818

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