中文摘要：

金色中仓鼠幼鼠可以利用可听声和超声信号与母鼠进行交流，这些声音可以反映个体的寒冷、饥饿、疼痛等不同生理状态和需求。因疼痛诱发的叫声对于维持幼鼠的存活也有着重要意义。本实验通过录制人为疼痛刺激下，不同日龄金色中仓鼠的叫声，分析并比较了5—30日龄金色中仓鼠不同发声信号特征（可听声出现频次、可听声持续时程、可听声主频率、超声出现频次、超声持续时程、超声主频率）的性别差异；同时记录了幼鼠的两种发声随日龄的变化趋势。结果发现：幼鼠两种叫声的各种参数均未表现性二型现象。幼鼠超声发生频次随日龄增加而逐渐减少。而可听声却正相反，随日龄增加而逐渐上升，并在20日龄时达到最高峰，之后逐渐下降。可听声持续时程也随日龄而增加。综上，在人为疼痛刺激下，随着日龄增加，幼鼠更倾向于使用可听声而非超声与母兽进行交流。

英文摘要：

Newborn golden hamsters （Mesocricetus auratus） usually send out audible and ultrasonic calls to communicate with dams. These vocalizations provide an index of the state of the animal, such as the degree of stress from cold, hunger or ache. The calls caused by pain stress play an important role in the survival of pups. In this study, we investigated vocal- izations resulting from artificial pain stress in golden hamster pups. We examined the development of vocalizations from 5 to 30 days of age and compared differences in the characteristics of audible vocalization and ultrasonic calls between males and females. The vocalization parameters included： audible call number （An） , audible call pulse duration （Ad） , audible call dominant frequency （Af）, uhrasonic call number （Un）, ultrasonic call pulse duration （Ud）, and ultrasonic call dominant frequency（Uf）. We found no difference in any parameter between vocalizations from males and females. The number of au- dible calls increased with age, and peaked at 20 days of age; however, the number of ultrasonic calls declined with age. Our results indicate that golden hamster pups switch from uhrasonic calls to audible calls as they age.