Deng Ke, Zhu Bi-Cheng, Zhou Ya, Chen Qing-Hua, Wang Tong-Liang, Wang Ji-Chao, Cui Jian-Guo
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China.
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China; University of Chinese Academy of Sciences, Beijing, China.
Behav Processes. 2019 Dec;169:103997. doi: 10.1016/j.beproc.2019.103997. Epub 2019 Nov 4.
Artificial light at night (ALAN) is a widespread anthropogenic stimulus that can significantly alter nocturnal animals' behavior, from migration to foraging to vocal communication. In the present study, we tested the hypothesis that the mate choice decisions of female serrate-legged small treefrogs (Kurixalus odontotarsus) were influenced by ambient light intensity. Standard two-speaker phonotaxis tests were conducted in a sound attenuating chamber. We set four light treatments (I-IV, from low to high) based on a range of light intensities from the maximum natural light at night (i.e., full moon) to that of the actual calling sites, which had artificial light. Contrary to our prediction, female frogs showed a preference for calls on the bright side in treatment I when they were exposed to identical stimuli. However, females preferred longer calls on the dim side to shorter calls on the bright side in this treatment. In addition, there were no significant effects of choice side, light treatment or their interaction on leave time or choice time. Our results suggest that females are more attracted to mates in bright light under natural nocturnal light conditions, but the preference for longer calls is not altered in serrate-legged small treefrogs.
夜间人造光（ALAN）是一种广泛存在的人为刺激因素，它能显著改变夜行性动物的行为，从迁徙、觅食到声音交流。在本研究中，我们检验了一个假设，即锯齿腿小树蛙（Kurixalus odontotarsus）雌性个体的配偶选择决策会受到环境光强度的影响。在消声室内进行了标准的双扬声器趋声性测试。我们根据从夜间最大自然光（即满月）到实际有灯光的鸣叫地点的一系列光强度设置了四种光照处理（I-IV，从低到高）。与我们的预测相反，当雌性青蛙暴露于相同刺激时，在处理I中它们表现出对明亮一侧叫声的偏好。然而，在这种处理中，雌性青蛙更喜欢昏暗一侧的长叫声而不是明亮一侧的短叫声。此外，选择侧、光照处理或它们的相互作用对离开时间或选择时间没有显著影响。我们的结果表明，在自然夜间光照条件下，雌性更容易被明亮光线下的配偶所吸引，但锯齿腿小树蛙对长叫声的偏好并未改变。
