Growth of pair bonding in Zebra Finches: physical and social factors
Growth of pair bonding in Zebra Finches: physical and social factors
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DOI：
10.2326/osj.5.65
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发表时间：
2006-07-01
影响因子：
0.6
通讯作者：
Okanoya, Kazuo
中科院分区：
文献类型：
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作者：
Ikebuchi, Maki;Okanoya, Kazuo
我们研究了斑马雀的配对形成过程。两只雄性和两只雌性，彼此不熟悉，被放在一个飞行笼子里。我们每天观察这四只鸟30分钟，连续观察10天。总共使用了五组四只鸟。在观察期内，每分钟记录每一个个体的位置。歌曲、争斗行为和其他行为的发生被实时记录下来，并离线执行额外的视频分析。当引入这些鸟时，雄鸟立即开始战斗，并建立了稳固的统治等级，通常在几分钟内。大部分定向歌曲发生在第一天，非定向歌曲的比例逐渐增加。在每一组中，鸟类至少形成了一对亲密的异性伴侣。我们分析了组成这对组合的个体的特性。结果表明，体重越大的雌性结成对的速度越快，赢得优势的雄性结合得更快，每组中五分之四的优势雄性体重比其他雄性更重。相比之下，配对的雄性和另一对雄性之间的歌曲持续时间和歌曲质量没有差异。在我们的实验环境中，女性对歌曲的关注度不如对社会支配力的关注。因此，求爱歌曲的功能意义是在男性之间的优势等级确立之后出现的，并被用作女性择偶的次要线索。
We investigated the process of pair formation in Zebra Finches. Two males and two females, unfamiliar with each other, were put in a flight cage. and we observed these four birds for 30 min each day for 10 days. In total, five sets of four birds were used. During the observation period, the position of each individual was recorded every minute. The occurrences of songs, agonistic behavior, and other behaviors were recorded in real time and additional video analyses were performed off line. On introducing the birds, the males immediately began fighting and a firm dominance hierarchy was established, usually within a few minutes. Most of the directed songs occurred during the first day and gradually the proportion of undirected songs increased. In each set, birds formed at least one intimate heterosexual pair. We analyzed the properties of the individuals that formed the pair. The results indicated that the heavier females pair-bonded quicker, and the males that won dominance bonded sooner and four out of five dominant males weighed more than the other male in each set. By contrast, the song duration and song quality of each male did not differ between the paired male and the other male. In our experimental setting, females did not pay as much attention to the song as to the social dominance. Therefore, the functional significance of courtship songs appears after the dominance hierarchy is established among males and is used as a secondary cue for mate choice in females.