The rich get richer: song complexity predicts song element sharing and song output in song sparrows Melospiza melodia
The rich get richer: song complexity predicts song element sharing and song output in song sparrows Melospiza melodia
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DOI：
10.1016/j.anbehav.2009.04.004
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发表时间：
2009-07-01
期刊：
影响因子：
2.5
通讯作者：
Tennenhouse, Erica
中科院分区：
文献类型：
--
作者：
MacDougall-Shackleton, Elizabeth A.;Stewart, Kathryn A.;Tennenhouse, Erica
动物的信号通常是复杂的，这增加了信号的不同方面可能传达不同类型信息的可能性。例如，鸟鸣可能同时宣传演唱者在早期生活中的状况（通过歌曲的复杂性）、歌曲学习的地点（通过当地的歌曲结构）和当前的状况（通过歌曲输出）。歌曲的这些方面在行为上都很突出：女性通常更喜欢复杂的歌曲而不是简单的歌曲，局部的歌曲而不是非局部的歌曲，高而低的歌曲输出率。我们研究了这三个组成部分的歌曲传达互补和冗余信息的程度，在东部歌麻雀，Melospiza melodia melodia。歌唱复杂性的一个衡量标准，音节库大小，与当地种群中其他鸟类的音节共享呈正相关。这一发现表明，这些方面传达了一些多余的信息，而本地发音的歌曲可能在一定程度上宣传了歌曲学习能力。歌曲复杂性的第二个衡量标准，歌曲曲目大小，与歌曲输出呈正相关，尽管歌曲复杂性和输出被认为是不同的发展时间尺度。早期发育期间的状况可能对成年后的状况有延续影响；另一方面，复杂的歌手可能会从宣传这种有吸引力的信号中获益最多。最后，尽管我们发现音节共享和歌曲输出都与歌曲复杂性相关，但音节共享和歌曲输出本身并不显著相关。总的来说，这里调查的三个表面上独立的方面似乎在它们传达的信息中有很大的重叠。(C) 2009动物行为研究协会。Elsevier Ltd.出版。版权所有。
Animal signals are often complex, raising the possibility that different aspects of a signal may convey different types of information. Birdsong, for example, may simultaneously advertise the singer's condition during early life (through song complexity), location of song learning (through local song structure) and current condition (through song output). Each of these aspects of song is behaviourally salient: females generally prefer complex over simple song, local over nonlocal song, and high over low rates of song output. We examined the degree to which these three components of song convey complementary versus redundant information, in eastern song sparrows, Melospiza melodia melodia. One measure of song complexity, syllable repertoire size, was positively related to syllable sharing with other birds in the local population. This finding suggests that these aspects convey somewhat redundant information and that local-sounding song may in part advertise song-learning ability. A second measure of song complexity, song repertoire size, was positively related to song output, despite the widely differing developmental timescales over which song complexity and output are thought to vary. Condition during early development may have carryover effects on adult condition; alternatively, complex singers may have most to gain from advertising this attractive signal. Finally, despite our finding that both syllable sharing and song output were related to song complexity, syllable sharing and song output were not themselves significantly correlated. Overall, the three ostensibly independent aspects of song investigated here appear to overlap substantially in the information they convey. (C) 2009 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.