鲨鱼内耳Maculae的种间变异。

IF 2.2 4区 生物学 Q2 BIOLOGY
Integrative Organismal Biology Pub Date : 2023-09-04 eCollection Date: 2023-01-01 DOI:10.1093/iob/obad031
Derek J Sauer, Kara E Yopak, Craig A Radford
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引用次数: 0

摘要

鱼类内耳毛细胞的组织有充分的多样性;这种变异被认为反映了物种在一系列生态位中的不同功能需求。然而,人们对蓝鳃类(鲨鱼、冰鞋和鳐鱼)内耳毛细胞数量和密度的种间变异(及其潜在的生态影响)知之甚少。在这项研究中,我们量化了9种分类和生态上不同的鲨鱼物种的囊状物、拉格纳物、胞囊和小斑中的内耳毛细胞。使用系统发育方面的比较方法,与主要以海底为食的物种相比,以水柱为食的鲨鱼在拉格纳和忽略斑(即垂直方向的斑)中的毛细胞密度和毛细胞总数明显更大。此外,与其他鲨鱼物种相比,Carcharhinidae中的鲨鱼似乎拥有一个特殊的忽视黄斑。总体而言,研究结果表明,与硬骨鱼类似,鲨鱼内耳的毛细胞组织存在相当大的差异,这可能与不同物种之间的生态和/或专门行为的变化有关。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Interspecific Variation in the Inner Ear Maculae of Sharks.

Interspecific Variation in the Inner Ear Maculae of Sharks.

Interspecific Variation in the Inner Ear Maculae of Sharks.

Interspecific Variation in the Inner Ear Maculae of Sharks.

There is well-documented diversity in the organization of inner ear hair cells in fishes; this variation is thought to reflect the differing functional requirements of species across a range of ecological niches. However, relatively little is known about interspecific variation (and its potential ecological implications) in the number and density of inner ear hair cells in elasmobranchs (sharks, skates, and rays). In this study, we quantified inner ear hair cells in the saccule, lagena, utricle, and macula neglecta of 9 taxonomically and ecologically distinct shark species. Using phylogenetically informed comparative approaches, sharks that feed in the water column had significantly greater hair cell density and total number of hair cells in the lagena and macula neglecta (i.e., vertically oriented maculae) compared to species that feed primarily on the seafloor. In addition, sharks within Carcharhinidae seemingly possess a specialized macula neglecta compared to other shark species. Overall, findings suggest that, similar to bony fishes, there is considerable variation in hair cell organization of shark inner ears, which may be tied to variation in ecology and/or specialized behaviors between different species.

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来源期刊
CiteScore
3.70
自引率
6.70%
发文量
48
审稿时长
20 weeks
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