高原鼢鼠震动信号发生部位及室内信号特征分析

Observation of seismic generating body parts andanalysis of signal characteristics of plateauzokor(Moyspalax baileyi)

摘要:

以祁连山东段高寒草甸栖息的高原鼢鼠(Moyspalax baileyi)为研究对象,于2018年7~10月,利用PVC管模拟高原鼢鼠洞道,使用录像设备和震动波检测设备记录高原鼢鼠室内震动信号和震动信号发生部位,并用Matlab软件分析震动信号特征。结果显示:(1)高原鼢鼠利用鼻吻部敲击洞道侧壁产生震动信号;(2)室内震动信号由数个连续的脉冲波组成。雄性个体一个敲击回合由2~17个脉冲(平均为6.67±2.63)组成,雌性个体一个敲击回合由2~14个脉冲(平均为6.04±2.35)组成;(3)雄性个体单回合敲击次数及持续时间显著高于雌性(P＜0.05),但敲击回合的相邻时间间隔差异不显著(t=0.485,P=0.628)。雄性相邻2次敲击时间间隔\[(0.13±0.01)s\]显著大于雌性\[(0.12±0.01)s\](t = 4.256,P=0.016),说明雌性敲击频率高于雄性;(4)震动信号频率分布雌性个体介于19.13~120.57Hz,雄性个体介于19.55~138.92 Hz,二者都偏于低频。雌性个体的主峰频率为54.28 Hz,雄性的主峰频率为49.16Hz,雌性显著高于雄性(P＜0.001)。综上,高原鼢鼠利用鼻吻部敲击洞壁产生震动信号,雌雄个体震动信号的敲击回合、次数以及能量分布均存在显著差异。

Abstract:

The seismic activity and seismic signal of plateau zokor (Moyspalax baileyi),which lives in alpine meadow in the eastern Qilian Mountains,were recorded with video camera and geophones from July to October 2018 by using an artificial tunnel with PVC to simulate plateau zokor tunnel in laboratory,and Matlab software was used to analyze the characteristics of the seismic signals.The results indicated that 1) plateau zokor used its snout to tap the side wall of the artificial tunnel to generate seismic signals;2) each seismic signal contained several pulse-groups.One bout of male plateau zokor contained 2-17 pulses (average 8.4±3.6),and 2-14 pulses (average 6.1±2.2) as for females;3) the number and duration of bout from males were significantly higher than females (P＜0.001),but there was no significant difference in the time intervals of adjacent two pulse-groups (T=-0.928,P=0.355).The time interval of adjacent two pulses from males (0.13±0.01s) was significantly longer than females (0.12±0.01) (T=4.256,P＜0.001),indicating that the bout frequency of females was higher than males;(4) the seismic signal frequency of females ranged from 19.13 to 120.57 Hz,and males ranged from 19.55 to 138.92 Hz,both were in low frequencies.The frequency of main peak of females was 54.28 Hz,and it was 49.16 Hz for males,the former was significantly higher than latter (P＜0.001).In conclusion,plateau zokor generate the seismic signals by using its snout to tap the tunnel,and there was a significant difference in the number of taps and bouts,as well as the energy distribution of the seismic signals between males and females.