Ear morphology in two root-rat species (genus Tachyoryctes) differing in the degree of fossoriality

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F21%3A43902886" target="_blank" >RIV/60076658:12310/21:43902886 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41320/21:85473

Result on the web

<a href="https://link.springer.com/article/10.1007%2Fs00359-021-01489-z" target="_blank" >https://link.springer.com/article/10.1007%2Fs00359-021-01489-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00359-021-01489-z" target="_blank" >10.1007/s00359-021-01489-z</a>

Result language

angličtina

Original language name

Ear morphology in two root-rat species (genus Tachyoryctes) differing in the degree of fossoriality

Original language description

It is supposed that the subterranean lifestyle in mammals is reflected in ear morphology and tuning of hearing to low frequencies. We studied two root-rat species to see if their ear morphology reflects the difference in the amount of their surface activity. Whereas the more subterranean Tachyoryctes splendens possesses shorter pinnae as expected, it has smaller bullae compared to the more epigeic Tachyoryctes macrocephalus. The ratio between the eardrum and the stapedial footplate area and the ratio between the mallear and the incudal lever were lower in T. splendens (19.3 +/- 0.3 and 1.9 +/- 0.0, respectively) than in T. macrocephalus (21.8 +/- 0.6 and 2.1 +/- 0.1), probably reflecting the latter&apos;s higher surface activity. The cochlea in both species has 3.5 coils, yet the basilar membrane is longer in the smaller T. splendens (13.0 +/- 0.5 versus 11.4 +/- 0.7 mm), which indicates its wider hearing range and/or higher sensitivity (to some frequencies). In both root-rat species, the highest density of outer hair cells (OHC) was in the apical part of the cochlea, while the highest density of inner hair cells (IHC) was in its middle part. This OHC density pattern corresponds with good low-frequency hearing, whereas the IHC pattern suggests sensitivity to higher frequencies.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10613 - Zoology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Comparative Physiology A

ISSN

0340-7594

e-ISSN

—

Volume of the periodical

207

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

469-478

UT code for WoS article

000647919100001

EID of the result in the Scopus database

2-s2.0-85105450189