TESTOSTERONE AND 5ALPHA-DIHYDROTESTOSTERONE LEVELS IN PERIPHERAL PLASMA OF MALE AND FEMALE RING DOVES (STREPTOPELIA-RISORIA DURING REPRODUCTIVE-CYCLE
TESTOSTERONE AND 5ALPHA-DIHYDROTESTOSTERONE LEVELS IN PERIPHERAL PLASMA OF MALE AND FEMALE RING DOVES (STREPTOPELIA-RISORIA DURING REPRODUCTIVE-CYCLE
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DOI：
10.1095/biolreprod16.5.666
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发表时间：
1977-01-01
影响因子：
3.6
通讯作者：
SILVER, R
中科院分区：
文献类型：
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作者：
FEDER, HH;STOREY, A;SILVER, R
用放射免疫法测定了配对雌雄环鸽外周血浆中睾酮(T)、5-α-二氢睾酮(DHT)和雄烯二酮(A)的含量。在雄鸟被转移到繁殖笼子配对之前，它们的T水平是183.4。+-。28.1pg/ml，双羟色胺为129.5.+-。16.3pg/ml，在与雌性配对后4小时内，雄性雄激素水平升高(T=322.8.+-)。136.5 pg/ml，dht=1043.8。+-。247.3 pg/ml)，配对后3天，T和DHT达到峰值(701.4±-)。116.8 pg/ml和1279.5+-。241.1 pg/ml)。到雌性下第一个蛋的时候，标志着求偶阶段的结束和孵化阶段的开始，T和dht的水平已经下降到189.6。+-。26.1和200.0。+-。41.9。在整个孵化和雏鸟饲养过程中，雄激素保持在大约这些较低的基线浓度，并仅在下一个生殖周期的开始(求偶阶段)显示出第二次上升。雄烯二酮水平从未超过10pg/ml。在没有雌性的情况下，无论是将雄性从他的家笼子移到新的笼子，还是将雄性与另一只雄性配对，T或DHT值都高于基线。去势的雄性与雌性配对后，T或DHT浓度没有高于基准值。雌性鸽子在繁殖周期的求偶阶段诱导雄性雄性激素分泌增加；雄激素激增的主要来源是睾丸，雄性鸽子循环中的主要雄激素是T和DHT。在雌性中检测到T和DHT，在求爱过程中的浓度往往比周期的其他阶段更高。在生殖周期的所有阶段，雌性的雄激素浓度都低于雄性。
Testosterone (T), 5.alpha.-dihydrotestosterone (DHT) and androstenedione (A) were measured by radioimmunoassay in peripheral plasma of paired male and female ring doves throughout the reproductive cycle. Before the males were moved to the breeding cage for pairing, their T levels were 183.4 .+-. 28.1 pg/ml, and their DHT levels were 129.5 .+-. 16.3 pg/ml. Within 4 h after pairing with a female, male androgen levels rose (T = 322.8 .+-. 136.5 pg/ml, DHT = 1043.8 .+-. 247.3 pg/ml), and by 3 days after pairing T and DHT had reached peak levels (701.4 .+-. 116.8 pg/ml and 1279.5 .+-. 241.1 pg/ml, respectively). By the time the female laid her 1st egg, marking the end of the courtship phase and the beginning of the incubation phase, T and DHT levels had declined to 189.6 .+-. 26.1 and 200.0 .+-. 41.9. Androgen remained at approximately these low baseline concentrations throughout incubation and squab rearing, and showed a 2nd elevation only at the beginning (courtship phase) of the next reproductive cycle. Androstenedione levels never exceeded 10 pg/ml. In the absence of females, neither removal of a male from his home cage to a novel cage, nor pairing of a male with another male elevated T or DHT above baseline values. Castrated males paired with females exhibited no rise in T or DHT concentrations above baseline values. Female doves induce increased androgen secretion in males during the courtship phase of the reproductive cycle; the major source of the androgen surge is testicular, and the predominant circulating androgens in male doves are T and DHT. T and DHT were detected in females, with somewhat higher concentrations tending to occur during courtship than at other phases of the cycle. Androgen concentrations in females were lower than those of males at all stages of the reproductive cycle.