Cynx J, Nottebohm F
Rockefeller University Field Research Center for Ecology and Ethology, Millbrook, NY 12545.
Proc Natl Acad Sci U S A. 1992 Feb 15;89(4):1368-71. doi: 10.1073/pnas.89.4.1368.
Operant conditioning techniques were used to assess how gender and song familiarity affect song discrimination in adult zebra finches (Taeniopygia guttata). Twenty-five males and females, divided into five cohorts, were trained to discriminate between conspecific songs at different times of year. Males discriminating between their own and another song from their own aviary reached criterion in the fewest number of trials, followed by males discriminating between two songs from their own aviary, then by males discriminating between songs they had not heard before. Females discriminating between two songs from their own aviary required more trials than males to reach criterion, but, unlike in males, song familiarity did not have a significant effect on song discrimination by females. The number of trials required to reach criterion was greater in winter than in summer, suggesting a photoperiodic effect in what has been regarded as a nonphotoperiodic species. Gender, season, and familiarity appear to affect how zebra finches discriminate between conspecific songs.
操作性条件反射技术被用于评估性别和歌曲熟悉程度如何影响成年斑胸草雀（Taeniopygia guttata）对歌曲的辨别能力。25只雄性和雌性斑胸草雀被分成五个组，接受训练以辨别一年中不同时间的同种歌曲。辨别自己鸟舍中自己的歌曲和另一首歌曲的雄性在最少的试验次数中达到标准，其次是辨别自己鸟舍中两首歌曲的雄性，然后是辨别从未听过的歌曲的雄性。辨别自己鸟舍中两首歌曲的雌性比雄性需要更多的试验次数才能达到标准，但与雄性不同的是，歌曲熟悉程度对雌性的歌曲辨别没有显著影响。达到标准所需的试验次数在冬季比夏季更多，这表明在被认为是非光周期物种中存在光周期效应。性别、季节和熟悉程度似乎会影响斑胸草雀对同种歌曲的辨别方式。
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