HORMONAL SPECIFICITY AND ACTIVATION OF SEXUAL-BEHAVIOR IN MALE ZEBRA FINCHES
HORMONAL SPECIFICITY AND ACTIVATION OF SEXUAL-BEHAVIOR IN MALE ZEBRA FINCHES
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DOI：
10.1016/0018-506x(83)90021-1
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发表时间：
1983-01-01
影响因子：
3.5
通讯作者：
WALTERS, MJ
中科院分区：
文献类型：
--
作者：
HARDING, CF;SHERIDAN, K;WALTERS, MJ
去势斑胸草雀接受6种激素治疗中的1种，每周与不同的雌性进行3次试验，并将其性行为与2个对照组进行对比，所述对照组由给予胆固醇植入物的完整或去势雄性组成。6种激素治疗是：2种芳香化雄激素，睾酮（T）和雄烯二酮（AE）; 2种非芳香化雄激素，雄酮（AN）和双氢睾酮（DHT）;雌激素，雌二醇（E）;或E + DHT的组合。一半接受双氢睾酮的男性接受了5 α。异构体，一半接受5 β-异构体。与完整的雄性相比，阉割显著降低了雄性向雌性求爱的比例，总的求偶展示，高强度求偶展示，喙擦拭活动，并显著增加了表现这些行为的潜伏期。被阉割的雄性从不试图骑上雌性。所有这些求偶和交配行为的测量仅通过同时提供雌激素和α-雌二醇的处理才恢复到正常水平。雄激素代谢物（即，T，AE，E + α DHT）。AE显然是其中最有效的，在几项措施上使行为显著高于正常水平。AN处理在所有测量上比α DHT更有效，并且在一些测量上与完整的鸟没有显著差异。用E、α-DHT、β-DHT或E + β-DHT治疗完全无效。令人惊讶的是，女性只征求男性的激素治疗提供雌激素代谢产物。他们不仅征求给予可芳香化雄激素的雄性，这显示出高比率的求偶活动，他们还征求给予E或E + β DHT的雄性，其中一些甚至从未求偶。去势和激素治疗也影响身体和体重，但方向相反。去势使体重增加，而使小肠重量减少。激素治疗提供α-雄激素代谢物降低体重并增加鸣管重量。同时提供雌激素的治疗效果略好。
Castrated zebra finches receiving 1 of 6 hormone treatments were given 3 weekly tests with different females and their sexual behavior was contrasted with that of 2 control groups consisting of intact or castrated males given implants of cholesterol. The 6 hormone treatments were: 2 aromatizable androgens, testosterone (T) and androstenedione (AE): 2 nonaromatizable androgens, androsterone (AN) and dihydrotestosterone (DHT); an estrogen, estradiol (E); or a combination of E + DHT. Half the males receiving DHT received the 5.alpha.-isomer, half received the 5.beta.-iosomer. Castration significantly reduced the proportion of males which courted females, total courtship displays, high-intensity courtship displays, beak wiping activity, and significantly increased the latencies to show these behaviors compared to intact males. Castrated males never attempted to mount a female. All of these measures of courtship and copulatory behavior were restored to normal levels only by treatments providing both estrogenic and .alpha.-androgenic metabolites (i.e., T, AE, E + .alpha.DHT). AE was clearly the most effective of these, raising behavior significantly above normal on several measures. AN treatment was more effective than .alpha.DHT on all measures and not significantly different from intact birds on some. Treatment with E, .alpha.DHT, .beta.DHT, or E + .beta.DHT was totally ineffective. Surprisingly, females only solicited males whose hormone treatments provided estrogenic metabolites. Not only did they solicit males given aromatizable androgens, which showed high rates of courtship activity, they also solicited males given E or E + .beta.DHT, some of which never even courted. Castration and hormone treatment also affected body and syringeal weight, but in opposite directions. Castration increased body weight while decreasing syringeal weight. Hormone treatments providing .alpha.-androgenic metabolites decreased body weight and increased syrinx weight. Treatments supplying estrogen as well were slightly more effective.