Reproductive state modulates utricular auditory sensitivity in a vocal fish
Reproductive state modulates utricular auditory sensitivity in a vocal fish
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繁殖状态调节发声鱼的椭圆囊听觉敏感性
DOI：
10.1152/jn.00315.2022
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发表时间：
2022
影响因子：
2.5
通讯作者：
Sisneros, Joseph A.
中科院分区：
文献类型：
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作者：
Rogers, Loranzie S.;Coffin, Allison B.;Sisneros, Joseph A.
平鳍见习，Porichthys notatus，是一种季节性繁殖的声音鱼，依靠声音通信来介导夜间生殖行为。生殖女性使用自己的听觉检测和本地化的“唱歌”男性生产多谐波广告（交配）呼吁在繁殖季节。以前的工作表明，海军军官候补生球囊，这被认为是主要的最终器官用于听力在海军军官候补生和大多数其他鱼类，表现出生殖状态和依赖于鱼的变化，增强球囊听觉灵敏度。相比之下，椭圆囊以前被认为主要是前庭功能，但最近的证据表明，它也可能服务于听觉功能，并有助于检测行为相关的声学刺激。在这里，我们的特点是椭圆囊的毛细胞记录在生殖和nonreproductive女性海军军官候补生在水下声音测试的假设，生殖状态的变化影响椭圆囊的听觉灵敏度。我们发现，生殖女性的椭圆囊毛细胞表现出椭圆囊电位幅度增加了6倍，并且具有基于粒子加速度测量的阈值（re：1 ms−2），在广泛的频率范围内比非生殖女性低7-10 dB，其中包括男性广告呼叫的主要谐波。这种增强的听觉敏感性的椭圆囊可能起着至关重要的作用，促进海军军官候补生社会和生殖声学communications.NEW &值得注意的是，在许多动物，声音声学通信是促进社会行为的基础。对于发声的平鳍见习鱼，社会声学信号的检测和定位是该物种繁殖成功的关键。在这里，我们表明，椭圆囊，内耳末端器官通常被认为主要是前庭功能，提供听觉功能，是季节性的塑料和调制的动物的生殖状态有效地提高听觉灵敏度求爱男性广告电话。
The plainfin midshipman,Porichthys notatus, is a seasonally breeding vocal fish that relies on acoustic communication to mediate nocturnal reproductive behaviors. Reproductive females use their auditory senses to detect and localize “singing” males that produce multiharmonic advertisement (mate) calls during the breeding season. Previous work showed that the midshipman saccule, which is considered the primary end organ used for hearing in midshipman and most other fishes, exhibits reproductive state and hormone-dependent changes that enhance saccular auditory sensitivity. In contrast, the utricle was previously posited to serve primarily a vestibular function, but recent evidence in midshipman and related toadfish suggests that it may also serve an auditory function and aid in the detection of behaviorally relevant acoustic stimuli. Here, we characterized the auditory-evoked potentials recorded from utricular hair cells in reproductive and nonreproductive female midshipman in response to underwater sound to test the hypothesis that variation in reproductive state affects utricular auditory sensitivity. We show that utricular hair cells in reproductive females exhibit up to a sixfold increase in the utricular potential magnitude and have thresholds based on measures of particle acceleration (re: 1 ms−2) that are 7–10 dB lower than nonreproductive females across a broad range of frequencies, which include the dominant harmonics of male advertisement calls. This enhanced auditory sensitivity of the utricle likely plays an essential role in facilitating midshipman social and reproductive acoustic communication.NEW & NOTEWORTHYIn many animals, vocal-acoustic communication is fundamental for facilitating social behaviors. For the vocal plainfin midshipman fish, the detection and localization of social acoustic signals are critical to the species’ reproductive success. Here, we show that the utricle, an inner ear end organ often thought to primarily serve a vestibular function, serves an auditory function that is seasonally plastic and modulated by the animal’s reproductive state effectively enhancing auditory sensitivity to courting male advertisement calls.