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Reference vocalization in African grey parrot (Psittacus erithacus)
Brojerová, Jana ; Lindová, Jitka (advisor) ; Policht, Richard (referee)
The ability to communicate referentially has been historically viewed as being uniquelly human. However, with the increasing amount of studies discussing the communicative faculty of animals in the context of the evolution of human language, there is now growing evidence that this ability is present in many animal species, too. Although we know a lot about mimetic abilities of domesticated African grey parrots' (Psittacus erithacus) and their competence to use human words in a referential way, we know very little about the elements of referentiality in their natural vocalization. Our goal in this work was to find, whether and in which context is functionally referential vocalization in this species of birds present. We were determining its presence by the experiment, in which we have exposed four captured African grey parrot, in the ownership of FHS UK Prague, to stimuli that in other animal species usually elicit functionally referential vocalization: predators and prefered type of food. We analysed the behaviour and vocalizations of the tested birds by analytic softwares Interact, respectively Soundforge 0.8. We find out, that despite the fact that birds reaponded to our experimental objects appropriatelly (i.e. "predators" caused more fear and the like), they give the major amout of...
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Repertoire and specificity of vocalization in Grey parrot (Psittacus erithacus)
Kůrková, Petra ; Lindová, Jitka (advisor) ; Petrusková, Tereza (referee)
The aim of the study was to map the repertoire of vocalization of four wild-caught grey parrots (Psittacus erithacus), two males and two females. Data were collected during nine days from June to November 2008 by recording of vocalization in standardized conditions. Recorded sounds (3 052) were categorized according to their characteristics using both visual inspection of spectrograms and listening. We found 70 different call types, which were combined into 18 bigger groups. We found no subject to use the whole repertoire. Important differences were found both between individuals and between males and females. almost all call types were used throuthout the whole period of recording. Model spectrograms of all call types are shown. Key words: grey parrot, Psittacus erithacus, repertoire, vocalization
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Dominance and Submissiveness in Diverse Social Roles
Habešová, Tereza ; Klapilová, Kateřina (advisor) ; Lindová, Jitka (referee)
Dominance and submissiveness in diverse social roles T. Habešová, K.Klapilová Faculty of Humanities, Charles University, U kříže 8, Prague 5, 150 00 Dominance as a stable personality trait of an individual is tested by a series of personality tests (eg, Cattell 16PF). But if we understand it as a variable describing the hierarchical superiority of an individual in a social interaction, we find that it may vary in different social roles. Monitoring the connection of dominance as a personality trait with dominance in relationships is an unexplored area due to the fact that there are not many standardized methods how to determine the dominance in a romantic relationship. The aim of our study was to 1) verify that the degree of dominance as the personal characteristics of an individual corresponds to his dominance in a romantic relationship and 2) find out the spheres of dominance in partnership based on qualitative analysis of interviews with both partners In the final session of longitudinal research of cohabitation (Klapilová et al. 2006 - 2009), 86 pairs completed a set of standardized questionnaires that was used to determine their personal dominance and dominant behaviour (IPIP- International Personality Item Pool; NEO-PI-R- subscale of assertiveness). Dominance/ submissiveness in a partnership were...
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