登录
 机构网站
  1. 首页
  2. 情报产品
  3. 快讯详情

《Bat calls contain wealth of discernible information》

  • 来源专题：水声领域信息监测
  • 编译者： ioalib
  • 发布时间：2016-12-29

  • Bats, like humans, are extremely social mammals. They enjoy an average lifespan of 20-30 years, settle in large colonies, and rely heavily on social interactions for their survival, using vocalizations -- or calls -- for communication. There is very little known about the purpose and content of these noises.

    A new Tel Aviv University study published in Scientific Reports extracts critical information from bat vocalizations to offer a rare, informative look into the world of bat communication. The new research, led by Prof. Yossi Yovel of the Department of Zoology at TAU's Faculty of Life Sciences, delves into the veritable cacophony emitted by bats to identify concrete evidence of a socially sophisticated species that learns communication, rather than being born with a fixed set of communication skills.

164浏览量
原文链接
相关报告

  • 《Traffic noise reduces birds' response to alarm calls》
    • 来源专题：水声领域信息监测
    • 编译者：ioalib
    • 发布时间：2016-12-29
    • Pollution can take many forms--including noise. Excess noise in the environment from sources such as traffic can have negative effects on animals that rely on sound to communicate and get information about their surroundings. A new study from The Condor: Ornithological Applications shows that traffic noise makes birds less responsive to alarm calls that would otherwise alert them to dangers such as predators.
    141浏览量
    原文链接

  • 《Acoustically diverse vocalization repertoire in the Himalayan leaf-nosed bat, a widely distributed Hipposideros species》
    • 来源专题：水声领域信息监测
    • 发布时间：2016-11-21
    • Insectivorous bats vocalize to both communicate with conspecifics and to echolocate. The communicative vocalizations or “calls” of bats either consist of or are constructed from discrete acoustic units, termed “syllables.” This study examined syllable diversity in the Himalayan leaf-nosed bat, Hipposideros armiger, a species that is widely distributed across Southeast Asia. This social species' vocalizations were hypothesized to consist of a wide variety of syllables facilitating its social interactions. To test this hypothesis, multiple acoustic parameters were measured from recorded vocalizations to map the acoustic boundaries of syllables. Spectrographic signatures were used to classify all recorded sounds into 35 distinct syllable types—18 as simple syllables and 17 as composites. K-meansclustering independently provided an optimal fit of simple syllables into 18 clusters with a good correspondence to 15 spectrographically assigned syllable types. Discriminant analysis further confirmed the spectrographic classification of constant frequency syllables (0% misclassification) and revealed a low (<15%) misclassification of spectrograms for all examples of frequency modulation syllables. Multidimensional scaling of mean values of multiple parameters provided a spectrographically constrained relational mapping of syllable types within two dimensions. These data suggest that H. armiger has a complex, well organized syllabic repertoire despite simple syllables being rarely emitted in isolation.
    116浏览量
    原文链接