Ema Hrouzková

Ema Hrouzková
University of South Bohemia in České Budějovice · Department of Zoology (KZO)

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18
Publications
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252
Citations

Publications

Publications (18)
Article
Full-text available
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,...
Chapter
Vocal communication is crucial for fossorial and subterranean rodents thanks to the special sensory environment in their underground burrows. The intersection between the research on vocalization and hormones is very small in these rodents. The reproductive hormones seem to influence the tuc-tuc calls in ctenomyids. The naked mole-rat nonbreeders r...
Article
Full-text available
The giant root-rat of the Bale Mountains, Ethiopia has been reported to have a mutualistic relationship with a passerine, which involves eavesdropping on its alarm call. We tested this in a field playback experiment. Besides the alarm call, we included two sounds potentially acting as alarm cues and one as a control. Little reaction of root-rats wa...
Article
Mammalian space‐use patterns are largely determined by the resources utilized as well as by given habitat characteristics, as can be illustrated by rodents displaying predominantly subterranean activity. These rodents are largely limited in their use of space by their burrow systems. This results in smaller home ranges than is usual for rodents of...
Article
Full-text available
We analysed seismic signals in two spalacid rodents with a different degree of fossoriality: the giant root-rat (Tachyoryctes macrocephalus) and the Gansu zokor (Eospalax cansus). As all hitherto studied spalacids they also produce seismic signals by head-thumping, which probably evolved as a ritualization of soil tampering. The seismic signal of g...
Article
Acoustic conditions in burrows are different from those aboveground and restrict hearing of subterranean mammals to low frequencies, which is reflected in the ear morphology. While low-frequency adaptations of the middle ear attracted more attention of researches, the inner ear remained rather understudied. Here, we examined the cochlea of the inne...
Preprint
In this study was tested mole-rat vocalization for presence of diverse individually distinctive features. An automatic system based on the GMM-UBM was used for individual recognition. The system distinguishes the recordings of the five mole-rats females. The overall achieved identification accuracy is 76.7%, the lowest 59.2%, and the highest 83.5%....
Article
Rodents with prevailing subterranean activity usually play an important role in the ecosystems of which they are a part due to the combined effect of herbivory and soil perturbation. This is also the case of the giant root-rat Tachyoryctes macrocephalus, Rüppell 1842, endemic to the Afroalpine ecosystem of the Bale Mountains, Ethiopia. We studied t...
Article
In spite of the growing interest in rodents with subterranean activity in general and the spalacids (Spalacidae) in particular, little is known about the biology of most members of this clade, such as the Chinese bamboo rat (Rhizomys sinensis). Here, we analyzed the ear morphology of R. sinensis with respect to hearing specialization for subterrane...
Article
Full-text available
Vocalizations play a major role in communication of mammals with subterranean lifestyles since other senses are dramatically restricted in the environment of below ground burrows. In our study, we recorded vocalizations of 10 adult males and 10 adult females of a social bathyergid, the Mashona mole-rat (Fukomys darlingi) in different behavioural co...
Article
Full-text available
A costly search for food in subterranean rodents resulted in various adaptations improving their foraging success under given ecological conditions. In Spalax ehrenbergi superspe-cies, adaptations to local ecological conditions can promote speciation, which was recently supposed to occur even in sympatry at sites where two soil types of contrasting...
Article
Full-text available
Predictable daily activity patterns have been detected repeatedly even in mammals living in stable environments, as is the case for subterranean rodents. Whereas studies on activity of these rodents under laboratory conditions almost exclusively have concerned themselves with the influence of light, many field studies have revealed signs of an asso...
Article
Full-text available
We describe the production of substrate-borne vibrations in a subterranean mole rat of the genus Tachyoryctes for the first time. These signals with a supposed communication function were recorded using two approaches. Firstly, we recorded the production of spontaneous substrate-borne vibrations of individual test animals in artificial tunnels simu...
Article
The Ansell's mole-rat (Fukomys anselli, Bathyergidae) is a small-sized social subterranean rodent whose distribution is confined to the Lusaka area in Zambia. It is an established model species for various laboratory studies, but until now the knowledge of its biology under natural conditions has been limited. Here, we provide the first comprehensi...
Article
Full-text available
In subterranean ecotope, where absence of light and ventilation limits visual and olfactory communication, options for long-range communication are restricted. Sound is thus one of the few channels available for transfer of the intraspecific information if the animals are not in direct contact. Nevertheless, even this kind of communication is limit...
Article
Full-text available
We examined vocalisations of a solitary subterranean rodent, the Silvery Mole-rat Heliophobius argenteocinereus (Bathyergidae). Seven true vocalisations and one mechanical vocalisation were identified. The main frequencies of the analysed sounds (0.34–13.17 kHz) match to a great extent the frequency range suitable for transmission in underground bu...
Chapter
Why study acoustic communication? And why in subterranean rodents? There are several reasons for studying acoustic communication in this particular group of mammals. First, acoustic communication is of great importance to the organization of animal societies. Animals use vocal signals to elicit specific behaviors, initiate contacts with conspecific...

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