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Specific response of primates to snake predators
Regásková, Kristýna ; Landová, Eva (advisor) ; Lhota, Stanislav (referee)
The specific response to snake predators in primates is due to long coevolution with snakes. This long coevolution has led to a specific and complex response in primates when confronted with snakes. The cues by which primates recognize snakes versus other types of stimuli may be based on olfactory or visual information. Reactions such as a priori fear or avoidance may be followed by various antipredatory responses such as specific vocalizations, avoidance behaviour, early escape or, conversely, active defence and mobbing. The response to venomous snakes and constrictors can vary in many ways based on the different threat they pose. Key words: Predation, mobbing, snake, primates, vocalization, anxiety
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Intraspecific communication in rodents with a special focus on the model genus Rattus
Rychtecká, Eliška ; Rudolfová, Veronika (advisor) ; Vojtěchová, Iveta (referee)
The genus Rattus includes several dozen species. Among the most significant that I am focusing on in this work are the Norway rat (Rattus norvegicus), the black rat (Rattus rattus) and the Polynesian rat (Rattus exulans). Representatives of these species are social animals inhabiting different enviroments, whether they are tree canopies or burrow systems. Intraspecific communication of rodents is very diverse, specifically in the genus Rattus. According to the types of signals, intraspecific communication can be divided into acoustic, visual, tactile or chemical. We can distinguish multimodal communication as a special chapter, where signals from different modalities occur together, interwine or are gradually added to each other. Individual species of the genus Rattus can differ in the form of signals. Furthermore these signals also differ between individual sexes so we could set apart communication between males and females during mating. Key words: rodents, norway rat, black rat, communication, signal, vocalization, posture, marking
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Bioacoustics in frogs
Karochová, Lucie ; Šandera, Martin (advisor) ; Schneiderová, Irena (referee)
This thesis is focused on bioacoustics in frogs. The purpose was to compare known informations about vocalization types, influence of sexual selection on males call, chorusing behavior and influence of predation. Bioacoustics research was carried on many frog species from different part of world, with most experiments being carried on neotropical frogs, specifically Physalaemus pustolosus. Acoustics communication is a wide-spread phenomenon across the animal kingdom. The theme of bioacoustics is studied quite extensively. The most studies is focused on birds or mammals, and the study of frogs, especially the European species, is poorly known. The influence of sexual selection on males vocalization is well known, while research in other evolutionary principles such as the effect of predator is studied only marginally. Research on new types of frogs tend to focus on the description of vocalization types that occur in a given species. In addition to in detail are studied individual voice parameters such as frequency or intensity and chorusing frogs are determined mainly by call-timing or synchronization. Newly was discovered ability of some frogs generate ultrasonic harmonies and surprising discovery was female vocalization as well. Generalization of facts is quite difficult because of the lack of...
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The acoustic detection of potential predator in domestic horse (Equus caballus)
Vidimská, Tereza ; Komárková, Martina (advisor) ; Fuchs, Roman (referee)
Equidae belong to a group of large herbivores, which survival in natural environment depends beside others on their capability of fast predator recognition and detection. They can sensually recognise a possible threat in advance and react by immediate escape, which increases their survival. Also domestic horses still show very sensitive reaction to sudden (unexpected) stimuli. So we assume, that the ability to detect predator immediately is conserved despite of the long domestication process. The supportive indirect evidence is given by the successful breeding of the feral herds all over the world. However, studies showing the direct reaction of domestic horse toward the canids (as the most common predators), are still absent. Aim of the work was to find, if the horses (Equus caballus) could recognize acoustic sign of dogs like predators and if they could recognize the level of potential threat according to the number of predators, similarly as their wild ancestors. The recordings of barking of big dog breeds were obtained and modified. The final recording contained the set of barking coming from one individual or three different. The recording was played to the experimental horses, under controlled conditions, together with white sound as a control. The reactions were recorded. Altogether 12...
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Early ontogeny of mother offspring bonding in Bovinae
Staňková, Helena ; Komárková, Martina (advisor) ; Jůnková, Pavla (referee)
The aim of this thesis is, based on the literature, to study the origin, characters and duration of social bonds between the mother and her offspring in Bovinae. The emphasis was given on the specifics of the behaviour related to birth and ecological differences between species. The explored group covers medium and large Artiodactyla living in groups. Many of them were domesticated, and they live in specific conditions so their behaviour may differ. The strongest bond is between the mother and her offspring. This bond is essential for the young, which is completely dependent on the maternal care. Maternal behaviour may be observed few days before parturition, but the most visible sign is maternal separation from the herd to secure exclusive interaction with own offspring. Mother learns to recognize her offspring after parturition, primarily by smell, also for this reason the young is licked. Suckling provides the nutrition to the calf, but also it reinforces mutual relationship. The strength of the bond is mainly dependant on the social environment, strategy of the young, it's age and other factors. The bond between the mother and her offspring differs according to the species, in the duration and in a way of termination. This topic is nowadays only poorly understood and needs further research.
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Behavioral expression of pain in rats
Zámečník, Jakub ; Vaculín, Šimon (advisor) ; Boukalová, Štěpána (referee)
The aim of this work is to summarize the current knowledge regarding the behavioral expressions of pain in rat. The work is focused on rats, because they are one of the most used laboratory animals, and may experience pain in some experiments. Behavioral expressions of pain were selected, because they are quite easily recognizable and measurable. The reader will be first acquainted with the necessary basics associated with the phenomenon of pain, with its conception in animals, with classification, physiology and for example with the ways in which are in rats experimentally induced pain. Then in the second part, there are shown individual behavioral expressions with examples in which cases were these manifestations observed. So everyone who is interested can learn something about pain in connection with the avoidance reaction, pose, appearance, specific movements of rat, vocalization, changes in eating and drinking, changes in activity, anxiety, cognitive functions and many other expressions. The work can be valuable contribution for all workers with animals and with its character can contribute to animal welfare. Powered by TCPDF (www.tcpdf.org)
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Boar vocalizations and their potential role in sexual selection
Roreitnerová, Daniela ; Linhart, Pavel (advisor) ; Schneiderová, Irena (referee)
The aim of this research was to gather existing knowledge about vocalizations of boars and their potential role in sexual selection. Few studies mainly from the 70s and 80s of the last century suggest that the so-called love song, emitted by males during courtship, could act as a stimulant that triggers mating. However, I did not find any evidence that boars significantly use calls in fights. Most studies deal with pig vocalization in a different context. For this reason, I tried to look at the studies of pig relatives - even-toed ungulates - to better evaluate the potential role of boar vocalizations in sexual selection. In their case, the influence of the calls on the sexual behavior of females and competing males was reported. It is possible to conclude that the role of boar vocalization is probably not that important as in red deers, for example, because boars use calls in short range communication. On the other hand, stimulatory effect on females was found in other species too. Further studies are needed to understand possible function of boar vocalizations that could be used for example in pig breeding to improve the effectiveness of artificial insemination of sows. Powered by TCPDF (www.tcpdf.org)
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Mapping of distribution of red deer and sika deer hybrids in Czechia using audio recordings - citizen science project
Nečasová, Monika ; Pipek, Pavel (advisor) ; Červený, Jaroslav (referee)
In the Czech Republic, as in other parts of Europe (e.g., British Isles), the native European red deer (Cervus elaphus) has been hybridising with sika deer (C. nippon), which was introduced from East Asia. The hybrids are fertile, and, therefore, can backcross with their parental species and threaten their genetic integrity. Offsprings of such multiple crosses are very difficult to identify according to their morphological traits, while more reliable genetic methods are financially and logistically demanding. This work follows the study of Long et al. from 1998, which showed clear differences in vocalization between red deer, sika deer and the first generation of their hybrids, and thus suggested the third way how to identify hybrids - bioacoustic analysis. We decided to test this method in the Czech Republic in a citizen science project, the aim of which was to map the distribution of parent species and their hybrids using audiorecordings of rut vocalisation. To allow more detailed analysis, we also recorded our own recordings on a professional recording device with a directional microphone. In total, 451 recordings were collected, of which only 263 with a vocalization of 162 individuals were selected for further analysis. Recordings from previous studies from Ireland (Long et al. 1998; Wyman et...
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