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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
The impact of noise and light pollution on voice activity of Chiffchaff (Phylloscopus collybita)
 Žilinčíková, Nikola ; Hodačová, Lenka (advisor) ; Kočicová, Pavlína (referee)
The continuing growth of the worldss population causes increase of anthropogenic influence on environment. In this mechanized times the often observed factors with influence on (not only) birds populations, are light and noise. These factors of environment can have negative impact on birds song and behavior related to it. Vocal expression is essential for communication of bird species and is necessary for their life processes. The birds are therefore, under the influence of stressors, forced to adapt themselves to newly emerging environment. This work investigates the influence of light and noise pollution on vocalization of chiffchaff (Phylloscopus collybita) during the morning and evening hours. The obtained data came from 4 types of locality (light-polluted, noise-polluted, light-noise polluted and without pollution) where the factors were represented predominantly by the noise of traffic and by artificial night lighting. Localities with presence of chiffchaff were selected and voice recorder was then placed into his territory. The obtained records of his voice were subsequently analyzed. The recording was done since April until May 2015, solely during the good weather conditions (without storms and strong wind). A development and intensity of the birds song were compared. The spotted result was a shift of chiffchaff´s morning vocalization initiation under the influence of light and noise pollution and increased intensity of birds song in the morning hours, in the locality affected by light and also in the noisy locality during the sunset.
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