Khan I A, Joy K P
Centre of Advanced Study in Zoology, Banaras Hindu University, Varanasi, India.
Chronobiol Int. 1988;5(4):311-6. doi: 10.3109/07420528809067776.
In Channa punctatus, a significant daily variation in hypothalamic 5-HT level and monoamine oxidase (MAO) activity was noticed in preparatory phase (February), but not in prespawning (May) or postspawning (November) phases. Hypothalamic dopamine (DA) and noradrenaline (NA), on the other hand, showed marked daily variation in their levels during all the three seasons with peak values in the photophase. The overall activity of MAO (mean +/- SEM on 24-hr period) increased from November to May through February, whereas the 5-HT content which was high in November decreased during February and May. The NA and DA levels were low in November and February and high in May. The catecholamine (CA) content and MAO activity increased with increasing photoperiod and temperature which is indicative of an enhanced CA metabolism.
在斑鳢中，下丘脑5-羟色胺（5-HT）水平和单胺氧化酶（MAO）活性在准备阶段（2月）呈现出显著的每日变化，但在产卵前（5月）或产卵后（11月）阶段则没有。另一方面，下丘脑多巴胺（DA）和去甲肾上腺素（NA）在所有三个季节中其水平均呈现出显著的每日变化，在光照期达到峰值。MAO的总体活性（24小时期间的平均值±标准误）从11月到5月通过2月逐渐增加，而11月时较高的5-HT含量在2月和5月期间下降。NA和DA水平在11月和2月较低，在5月较高。儿茶酚胺（CA）含量和MAO活性随着光周期和温度的增加而增加，这表明CA代谢增强。
