<p> <span style="font-family: "Times New Roman", serif; font-size: 12pt; text-align: justify; text-indent: 0.5in;"> </span><span style="font-family: "Times New Roman", serif; font-size: 12pt; text-align: justify; text-indent: 0.5in;">The pineal gland of </span><i style="font-family: "Times New Roman", serif; font-size: 12pt; text-align: justify; text-indent: 0.5in;">Notopterus notopterus</i><span style="font-family: "Times New Roman", serif; font-size: 12pt; text-align: justify; text-indent: 0.5in;"> consists of 3 separate but distinctly connected components and it is located dorsal to the forebrain immediately below or within the skull roof. The pineal complex is well vascularized in this species The diagrammatic presentation was constructed based on the thick free hand sections and it was found that it has an end vesicle (EV) present just below the roof of cranium, a long and curved pineal stalk (PS) and a dorsal sac (DS). Histological studies showed that the pineal gland consist of about 80% of the cells that have rounded vesicular nuclei, which are pinealocytes. These pinealocytes positively stain with haematoxylin and eosin, the remaining cells may be astrocytes, which cannot be seen on H&E stained slides. melatonin administration at different doses alters the</span><span style="font-family: "Times New Roman", serif; font-size: 12pt; text-align: justify; text-indent: 0.5in;">  </span><span style="font-family: "Times New Roman", serif; font-size: 12pt; text-align: justify; text-indent: 0.5in;">GSI (TSI),HSI and BSI.</span></p> <p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;text-align:
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