Otolith regularities
Otolith regularities
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DOI：
10.1016/s0378-5955(00)00026-5
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发表时间：
2000-05-01
期刊：
影响因子：
2.8
通讯作者：
Rebane, YT
中科院分区：
文献类型：
--
作者：
Lychakov, DV;Rebane, YT
本文对15种黑海鱼类的椭圆囊、球囊和壶耳石的质量和面积大小进行了分析。形态测量耳石的衍生和功能和生态形态学的解释提出了建议。耳石发育规律有四个：（1）耳石质量随鱼体生长而逐渐增大; (2)小囊与椭圆囊、小囊与壶耳石的质量比不随鱼的生长而变化。(3)耳石面积s与耳石质量m之比可用指数方程s = alpha m（2/3）表示。(4)耳石和黄斑大小的比例不随鱼的生长而变化。进行了耳石位移响应的声学和瞬时力刺激的数学建模。在此基础上，提出了耳石耳的功能和生态形态学解释：（1）耳石质量越大，低频声敏感度越高，最大频率响应曲线越尖锐; (2)的频率响应曲线的囊状和lagenar耳石的最大值之间的分离几乎保持不变的鱼的生长。(3)底层和沿岸的鱼比中上层鱼有更好的听觉能力。(4)较大耳石对前庭刺激的敏感性较高，但反应较慢。较大耳石的相应加速度分辨率较高，耳石器官可以工作的加速度范围较窄。(5)椭圆囊、小囊和壶耳石器官的相对前庭敏感度随鱼的生长而保持恒定。(6)底栖和沿岸的鱼类的耳石器官被调谐到不同的加速度，并具有不同的功能特性。中上层鱼类的耳石器官适应于有限的加速度范围，与底层和沿岸的鱼类相比，对低加速度不太敏感。(C)2000 Elsevier Science B. V.保留所有权利。
The masses and the area sizes of the otoliths for the utriculus, sacculus and lagena of 15 species of the Black Sea fish are analyzed. Morphometrical otolith regularities are derived and their functional and ecomorphological explanations are suggested. The otolith regularities are summarized in four otolith rules: (1) the masses of the otoliths gradually increase with the fish growth. (2) The mass ratio of the sacculus and utriculus or the sacculus and lagena otoliths does not change with the fish growth. (3) The ratio between the otolith area s and the otolith mass m is described by the exponential equation s = alpha m(2/3). (4) The ratio between the otolith and macula sizes does not change with fish growth. Mathematical modeling of the otolith displacement responses to the acoustic and the instant force stimuli is performed. Based on the modeling the functional and ecomorphological explanations of the otolith regularities are suggested: (1) the greater the otolith mass, the higher the acoustic sensitivity at low frequencies and the sharper the frequency-response curve at its maximum. (2) The separation between maxima of the frequency-response curves for the saccular and lagenar otoliths remains virtually constant with the fish growth. (3) The bottom and littoral fish have better auditory capabilities than the pelagic fish. (4) The sensitivity to vestibular stimuli for greater otoliths is higher but the response is slower. The corresponding acceleration resolution for greater otoliths is higher and the range of accelerations in which the otolith organ can operate is narrower. (5) The relative vestibular sensitivities of the utriculus, sacculus and lagena otolith organs remain constant with fish growth. (6) The otolith organs of the bottom and littoral fish are tuned to different accelerations and possess different functional properties. The otolith organs of pelagic fish are adapted to a limited range of accelerations and are less sensitive to low accelerations as compared to the bottom and littoral fish. (C) 2000 Elsevier Science B.V. All rights reserved.