Hierarchical auditory perception for species discrimination and individual recognition in the music frog  

作　　者：Yanzhu Fan Ke Fang Ruolei Sun Di Shen Jing Yang Yezhong Tang Guangzhan Fang 

机构地区：[1]Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China [2]College of Life Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Life Science,Anhui University,Hefei 230601,China

出　　处：《Current Zoology》2022年第5期581-591,共11页动物学报（英文版）

基　　金：the grants from the National Natural Science Foundation of China Nos.32170504,31970422,and 31672305 to G.F.

摘　　要：The ability to discriminate species and recognize individuals is crucial for reproductive success and/or survival in most animals.However,the temporal order and neural localization of these decision-making processes has remained unclear.In this study,event-related potentials(ERPs)were measured in the telencephalon,diencephalon,and mesencephalon of the music frog Nidirana daunchina.These ERPs were elicited by calls from 1 group of heterospecifics(recorded from a sympatric anuran species)and 2 groups of conspecifics that differed in their fundamental frequencies.In terms of the polarity and position within the ERP waveform,auditory ERPs generally consist of 4 main components that link to selective attention(N1),stimulus evaluation(P2),identification(N2),and classification(P3).These occur around 100,200,250,and 300 ms after stimulus onset,respectively.Our results show that the N1 amplitudes differed significantly between the heterospecific and conspecific calls,but not between the 2 groups of conspecific calls that differed in fundamental frequency.On the other hand,the N2 amplitudes were significantly different between the 2 groups of conspecific calls,suggesting that the music frogs discriminated the species first,followed by individual identification,since N1 and N2 relate to selective attention and stimuli identification,respectively.Moreover,the P2 amplitudes evoked in females were significantly greater than those in males,indicating the existence of sexual dimorphism in auditory discrimination.In addition,both the N1 amplitudes in the left diencephalon and the P2 amplitudes in the left telencephalon were greater than in other brain areas,suggesting left hemispheric dominance in auditory perception.Taken together,our results support the hypothesis that species discrimination and identification of individual characteristics are accomplished sequentially,and that auditory perception exhibits differences between sexes and in spatial dominance.

关 键 词：event-related potentials(ERPs) individual identification music frog species discrimination temporal hierarchy 

分 类 号：Q42[生物学—神经生物学]