环境噪声对临安和阜阳两地白头鹎鸣声频率的影响  

Effects of Ambient Noise on the Vocal Frequency of Chinese Bulbuls,Pycnonotus sinensis in Lin'an and Fuyang Citiy

作　　者：韩轶才[1] 姜仕仁[2] 丁平[1] 

机构地区：[1]浙江大学生命科学学院,浙江杭州310028 [2]浙江科技学院,浙江杭州310012

出　　处：《Zoological Research》2004年第2期122-126,共5页动物学研究（英文）

基　　金：国家自然科学基金资助项目 (3 0 0 70 13 1)

摘　　要：为了解环境噪声对白头鹎 (Pycnonotussinensis)鸣声频率的影响 ,在浙江临安和安徽阜阳两地分别对白头鹎在高低噪声水平环境中的鸣声做了研究。把用数码录音机记录到的鸣声输入计算机 ,利用计算机声谱分析系统进行分析 ,再对每一鸣声的每个音节的主频进行Mann WhitneyU检验。结果显示 :高噪声水平区和低噪声水平区相比 ,在两地白头鹎每一鸣声的各音节主频中 ,最低和最高主频以及第Ⅰ、Ⅱ音节的主频都有显著提高 ;在阜阳第Ⅲ音节的主频也有显著提高。这表明白头鹎可以通过提高声音频率来避免环境噪声对鸣声的影响 ,从而保证噪声环境中声信息的有效传递 ;而噪声对各音节的不同影响也表明 ,同一鸣句的各音节 ,对于噪声通讯中的信息识别 。The study of the ambient noise's effect on the vocal frequency of Chinese Bulbuls, Pycnonotus sinensis ,was carried out in two cities (Lin'an and Fuyang) in China.Based on the noise level (55 db),the samples of each city were divided into two groups of high noise level and low noise level (HN and LN).The records of songs were inputted into the computer,and then the data of principal frequency (PF) of each syllable were gotten through fast Fourier transform (FFT) using a computerized analysis system.The statistical analyses of each syllable's PF of the songs were carried out with Mann Whitney U test to determine differences between HN and LN of each city.The results showed that the minimum PF,maximum PF,the first syllable (S Ⅰ) and the second syllable (S Ⅱ) of every song had significant differences between HN and LN in two cities.In Fuyang,the third syllable (S Ⅲ) had significant difference because of geographic diversity.In contrast HN with LN,the minimum PF,maximum PF and the PF of S1 and S Ⅱ increased significantly in the high noise level environment.This means that Chinese Bulbuls may avoid the interference of ambient noise with a higher pitch to communicate effectively,and the difference of ambient noise's effects on each syllable principal frequency shows that each syllable has different status in communication in noisy environment.

关 键 词：环境噪声 临安 阜阳 白头鹎 鸣声频率 信息传递 信息识别 

分 类 号：Q62[生物学—生物物理学]