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Zoological Research    2018, Vol. 39 Issue (2) : 114-122     DOI: 10.24272/j.issn.2095-8137.2018.026
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Stereotypy and variability of social calls among clustering female big-footed myotis (Myotis macrodactylus)
Yan-Hong Xiao1, Lei Wang1, Joseph R. Hoyt3, Ting-Lei Jiang1, Ai-Qing Lin1, Jiang Feng1,2,*
1 Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun Jilin 130117, China
2 School of Animal Science & Technology, Jilin Agricultural University, No. 2888 Xincheng Street, Changchun Jilin 130118, China
3 Department of Ecology and Evolutionary Biology, University of California, Santa Cruz 95064, USA
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Echolocating bats have developed advanced auditory perception systems, predominantly using acoustic signaling to communicate with each other. They can emit a diverse range of social calls in complex behavioral contexts. This study examined the vocal repertoire of five pregnant big-footed myotis bats (Myotis macrodactylus). In the process of clustering, the last individual to return to the colony (LI) emitted social calls that correlated with behavior, as recorded on a PC-based digital recorder. These last individuals could emit 10 simple monosyllabic and 27 complex multisyllabic types of calls, constituting four types of syllables. The social calls were composed of highly stereotyped syllables, hierarchically organized by a common set of syllables. However, intra-specific variation was also found in the number of syllables, syllable order and patterns of syllable repetition across call renditions. Data were obtained to characterize the significant individual differences that existed in the maximum frequency and duration of calls. Time taken to return to the roost was negatively associated with the diversity of social calls. Our findings indicate that variability in social calls may be an effective strategy taken by individuals during reintegration into clusters of female M. macrodactylus. 
Keywords Social calls      Clustering      Big-footed myotis     
Fund:This research was supported by the National Natural Science Foundation of China (31700319, 31670390); the Fundamental Research Funds for the Central Universities (2412017QD026); U.S. National Science Foundation (NSF) (DEB-1115895); and the NSF East Asian Pacific Summer Institute Program IIA-1415092
Corresponding Authors: Jiang Feng,E-mail:   
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Yan-Hong Xiao, Lei Wang, Joseph R. Hoyt, Ting-Lei Jiang, Ai-Qing Lin, Jiang Feng. Stereotypy and variability of social calls among clustering female big-footed myotis (Myotis macrodactylus). Zoological Research, 2018, 39(2): 114-122.
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