FEATURE WEIGHTING IN SPECIES SONG RECOGNITION BY THE FIELD SPARROW (SPIZELLA-PUSILLA)
FEATURE WEIGHTING IN SPECIES SONG RECOGNITION BY THE FIELD SPARROW (SPIZELLA-PUSILLA)
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DOI：
10.1163/156853988x00142
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发表时间：
1988-08-01
期刊：
影响因子：
1.3
通讯作者：
NELSON, DA
中科院分区：
文献类型：
--
作者：
NELSON, DA
将计算机修改的歌声呈现给野生雄性野外麻雀，以评估不同声学特征在物种歌声识别中的相对重要性。被测试的食物在田野麻雀的歌声中表现出不同程度的相对变异性。实验表明，野外麻雀对歌唱频率、短语的数量和顺序、颤音时长、音符形状和音符间隔的变化都很敏感。田野麻雀似乎“调整”到了歌唱特征的正常变化范围内。当实验歌曲中的特征相对于对照歌曲的特征改变两到三个标准差时，反应显著减少。这些结果与之前的结论形成了鲜明对比，即鸟类在物种歌声识别中只使用不变特征。然而，对不变特征、频率和相位数目的操纵对识别的干扰比对可变特征、音符间隔的同样明显的变化更大。歌曲中短语的数量和颤音音符的持续时间似乎是同样重要的识别线索。因此，野外麻雀在物种歌曲识别中整合了至少五个不同特征的信息，但给予来自不变特征-歌曲频率的信息更多的权重，而不是来自可变特征的信息。
Computer-modified songs were presented to wild territorial male field sparrows to assess the relative importance of different acoustic features in species-song recognition. The feastures tested exhibited differing degrees of relative variability within field sparrow song. The experiments demonstrate that field sparrows are sensitive to changes in song frequency, number and order of phrases, trill-note duration, note ''shape'', and internote interval. Field sparrows appear to be ''tuned'' to the normal range of varition in song features. Responses decreased significantly when features in the experimental songs were changed by two to three standard deviations relative to a control song. These results contrast with previous conclusions that birds only use ''invariant'' features in species-song recognition. However, manipulations of invariant features, frequency and number of phases, interfered with recognition more than did an equally-noticeable change to a variable feature, inter-note interval. The number of phrases in a song and the duration of trill notes appear to be equally important recognition cues. Thus, field sparrows integrate information from at least five different features in species song recognition, but give more weight to information from an invariant feature, song frequency, than they do to information from variable features.