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Mechanisms enabling individual recognition of passerine birds
Caha, Ondřej ; Petrusková, Tereza (advisor) ; Vokurková, Jana (referee)
Vocalization allows birds to communicate over long distances or in environments, where can be difficult to detect visual signals. Vocalization can be divided into songs and calls. Song may inform a listener of signal about species, sex, male quality, aggressive motivation and also about singer's identity. Recognition of different individuals is very valuable ability that is commonly used during territorial interactions among males. Correct identification of males, that pose different threat, enable to respond adequately to the situation and save energy or to avoid injury in potential conflict. The ability of individual distinguishing based on song was demonstrated by using playback experiments for many passerines, but it was rarely revealed the way of such identification. This review deals with the issue of neighbour-stranger experiments that confirm the ability of passerines to discriminate between neighbours and strangers. Further, it focus on structures or characteristics of birdsong enabling individual recognition of passerines and their possibly use for individual acoustic monitoring.
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Utilization and potential of individual acoustic monitoring in birds
Kouřil, Jan ; Petrusková, Tereza (advisor) ; Schneiderová, Irena (referee)
Animal monitoring is a key tool for many disciplines and can be done many ways. One of them is acoustic monitoring, which is advantageous mainly for a research of animals with strong vocalisation. Bird vocalisations are one of the most conspicuous. It can carry many information about the singer, and identity is one of them. Vocal individuality has been documented in many bird species and it is considered as a widespread phenomenon. In species, where vocalisation is individually unique and also stable over time, it allows us to track and identify individuals from recordings of their vocalisations only, i.e. by individual acoustic monitoring. Using this approach, many ecological data (abundance, survival rate, etc.) might be successfully collected. So far, it was used mainly in species with simple, loud vocalisations which was difficult to monitor by commonly used physical marking due a dense habitats, cryptic coloration, low density of occurrence, etc. Most often, it used for owls, although the vocal individuality, or even its temporal stability, was documented in much more avian species. Compared to commonly used methods, individual acoustic monitoring is not used very often. However, it can be assumed that with the development an improvement of analytical methods, it will become a commonly used...
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Mechanisms enabling individual recognition of passerine birds
Caha, Ondřej ; Petrusková, Tereza (advisor) ; Vokurková, Jana (referee)
Vocalization allows birds to communicate over long distances or in environments, where can be difficult to detect visual signals. Vocalization can be divided into songs and calls. Song may inform a listener of signal about species, sex, male quality, aggressive motivation and also about singer's identity. Recognition of different individuals is very valuable ability that is commonly used during territorial interactions among males. Correct identification of males, that pose different threat, enable to respond adequately to the situation and save energy or to avoid injury in potential conflict. The ability of individual distinguishing based on song was demonstrated by using playback experiments for many passerines, but it was rarely revealed the way of such identification. This review deals with the issue of neighbour-stranger experiments that confirm the ability of passerines to discriminate between neighbours and strangers. Further, it focus on structures or characteristics of birdsong enabling individual recognition of passerines and their possibly use for individual acoustic monitoring.
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