Morphometry of otoliths in chicken macula lagena
Morphometry of otoliths in chicken macula lagena
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DOI：
10.1016/j.neulet.2006.05.046
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发表时间：
2006-08-14
影响因子：
2.5
通讯作者：
Chen, Lin
中科院分区：
文献类型：
--
作者：
Li, Chang-Xiang;Gong, Ming;Chen, Lin
大耳斑位于鸟类耳蜗尖的顶端，耳石数量众多，感觉功能不清。据报道，这些耳石与前庭系统中的耳石相似，但它们在形态上的详细特征尚不清楚。本研究用扫描电子显微镜对中国家鸡(Gallus LingNan)黄斑部耳石的数量、大小和形状进行了观察。在孵化后10~15日龄的雏鸡中，每个斑点的耳石数为16,055,4038(平均+/-S.D.，n=4)。耳石平均长12.98±3.70 mm，平均宽5.10±1.48 mm(n=526)。耳石的长宽比为2.58+/-0.39(n=526个耳石)，并保持相对恒定，尽管它们的物理大小不同。几乎所有的耳石形状规则，看起来像孤立的圆柱体，两端表面光滑，但也有少数耳石(占64,221个耳石的0.025%)形状奇特，如T形和十字形。这些结果表明，鸟类内耳前庭系统的耳石和斑状耳石具有相似的物理性质，在感知重力和加速度信号方面可能起着相似的作用。(C)2006爱思唯尔爱尔兰有限公司。保留所有权利。
The macula lagena located at the apical end of the cochlea in birds is characterized by the presence of numerous otoliths with unclear sensory functions. These otoliths are reported to be similar to those in the vestibular system but their detailed features in morphology are unknown. In the present study, we examined the number, size and shape of otoliths from the macula lagena in Chinese domestic chickens (Gallus Ling Nan) with a scanning electron microscope for morphometry. For chickens aged 10-15 post-hatch days, the otoliths in each macula lagena were counted to be 16,055 4038 (mean +/- S.D., n = 4). The average length and width were 12.98 +/- 3.70 mu m and 5.10 +/- 1.48 mu m (n = 526 otoliths), respectively. The ratio of length to width for the otolith was 2.58 +/- 0.39 (n = 526 otoliths) and remained relatively constant despite their variations in physical size. Almost all the otoliths were in regular shape and appeared like isolated cylinders with smooth facets at each end, but a few of them (0.025% of 64,221 otoliths screened) were found to be in odd shapes, such as T-shape and cross-shape. The results suggest that otoliths in the macula lagena and those in the vestibular system of bird's inner ear have similar physical properties and may play a similar role in sensing gravitational and acceleration signals. (c) 2006 Elsevier Ireland Ltd. All rights reserved.