高原鼢鼠震动通讯方式及信号研究

Study on seismic communication mode andsignal in plateau zokor

摘要:

通过室内模拟高原鼢鼠(Myospalax baileyi)洞道系统和野外无线追踪定位,研究高原鼢鼠种内震动通讯方式及信号。结果表明:(1)高原鼢鼠在洞道内利用吻端敲击洞道前壁产生震动信号,信号由数个连续的脉冲组组成。(2)高原鼢鼠在野外由吻端敲击产生的震动信号,雌性每个脉冲组包含2~24个脉冲,雄性包含2~13个。雌性单个回合敲击持续时间和敲击次数都显著高于雄性(P＜0.01),相邻两回合时间间隔雌雄差异不显著(P＞0.05)。(3) 震动信号能量分布:雌性介于14.83~148.04 Hz(N = 125),雄性介于10.77~148.96 Hz(N=42),二者都偏于低频且分布范围相近。雌性的主峰频率为58.5±13.58 Hz,雄性的主峰频率为39.98±13.94 Hz,雌性显著高于雄性(P＜0.01),但二者信号能量差异不显著(P＞0.05)。鉴于地下栖息环境的特殊性,震动信号用于地下孤立生活的高原鼢鼠洞道系统之间的长距离通信。

Abstract:

Through the indoor simulation of the tunnel system of plateau zokor,we found that the plateau zokor produced seismic signals by striking the front wall of the tunnel with the snout,which was composed of several continuous pulses.Furthermore,through the field of wireless tracking localization,we found that in the vibration signals generated by the plateau zokor,each pulse group of female contains 2~17 pulses and that of male contains 2~13 pulses.The duration and number of striking in a single bout were significantly higher in females than in males (P＜0.01),and there was no significant difference between males and females in the interval between adjacent bouts (P＞ 0.05).However,the rate of striking of females was significantly lower than that of males (P＜0.01).Seismic signal energy distribution of females ranged from 14.83~148.04Hz (N=125),and that of males ranged from 10.77~148.96Hz (N=42),both of which were low-frequency and in similar distribution range.The main peak frequency of females and males was 58.5±13.58 Hz and 39.98±13.94 Hz respectively,in which females significantly higher than that of males (P＜0.01),but there was no significant difference in signal energy between the gender (P＞0.05).In view of the particularity of the subterranean environment,the vibration signal may be used for long-distance communication of isolated plateau zokor living underground among tunnel systems.