EFFECT OF PHOTOPERIOD ON THE DIURNAL RHYTHM OF PLASMA TESTOSTERONE, DIHYDROTESTOSTERONE AND ANDROSTENEDIONE IN MATURE MALE CHICKENS
EFFECT OF PHOTOPERIOD ON THE DIURNAL RHYTHM OF PLASMA TESTOSTERONE, DIHYDROTESTOSTERONE AND ANDROSTENEDIONE IN MATURE MALE CHICKENS
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DOI：
10.1016/0300-9629(87)90399-9
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发表时间：
1987-01-01
影响因子：
2.3
通讯作者：
MASHALY, MM
中科院分区：
文献类型：
--
作者：
BACHMAN, SE;BACHMAN, JM;MASHALY, MM
研究了不同光周期对成年单冠白色来航公鸡血浆雄激素浓度、睾丸重量以及血浆睾酮（T）、二氢甾酮（DHT）和雄烯二酮（A）日节律的影响。每天将鸟暴露于14小时光照（0600-2000小时光照）或24小时光照。在3小时的时间间隔，从两组的鸟类中收集血液样品，并使用放射免疫测定法测量血浆T，DHT和A水平。采血后，将鸡称重、处死并记录睾丸重量。在14小时光照下，T和DHT的浓度呈昼夜节律，在黑暗期结束时达到峰值。A无明显节律。暴露于24小时的光取消昼夜节律下发现14小时的光。在光照24小时下，不仅睾丸重量增加，而且体重和激素浓度也增加。可见，光周期在控制成熟雄鸡雄激素浓度和节律方面起着重要作用。
The effects of different photoperiods on the concentrations of plasma androgens, testes weight and on the diurnal rhythm of plasma testosterone (T), dihydrosterosterone (DHT) and androstenedione (A) in mature, single comb White Leghorn male chickens were studied. Birds were exposed to either 14 hr of light (lights on at 0600-2000 hr) or to 24 hr of light per day. Blood samples were collected from birds in both groups at 3-hr intervals and plasma levels of T, DHT and A were measured using radioimmunoassays. Following blood collection, birds were weighed, killed and testis weights were recorded. Under 14 hr of light, there was a duirnal rhythm of T and DHT with hormone concentrations peaking at the end of the dark period. There was no obvious rhythm for A. Exposure to 24 hr of light abolished the diurnal rhythm found under 14 hr of light. There was an increase not only in testis weights but also in body weight and hormone concentrations under 24 hr of light. It was concluded that photoperiod plays an important role in controlling the concentration and rhythm of androgens in mature male chickens.