Variacion anual en las vocalizaciones de las aves urbanas dentro y fuera de su época reproductiva
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| Autor: | |
|---|---|
| Formato: | tesis de maestría |
| Fecha de Publicación: | 2025 |
| Descripción: | Urbanization is one of the main causes of biodiversity loss, as it replaces natural habitats with cities. However, birds have managed to adapt to urban ecosystems, although they face challenges such as habitat fragmentation, disease transmission, competition with exotic species and noise pollution. These factors affect their behavior, including vocal communication, which is essential for reproduction and territorial defense. Urban birds employ adaptive strategies, such as changing singing times or increasing the frequency of their vocalizations, to overcome environmental noise. This, however, involves greater energy expenditure and can negatively impact their reproductive success and health, increasing stress and modifying their circadian cycles. The study focuses on evaluating the change in bird vocalizations within and outside their breeding season, along an urban gradient. In the first section, we evaluate the change in the production of duets, based on the four-eyed finch (Melozone leucotis), a bird that inhabits diverse areas, including rural, peri-urban and urban environments. Its ability to vocalize throughout the year and its varied repertoire make it ideal for studying the effects of urbanization on its vocalizations. On the other hand, in the second section, we evaluated the number of nocturnal vocalizations and dawn choruses during a year along an urban gradient. To do this, we quantified the number of nocturnal vocalizations that were emitted by diurnal birds during the night, and we also studied how the richness and composition of dawn choruses can vary with respect to the degree of urbanization, the reproductive season, and also their relationship with the levels of light and noise pollution. |
| País: | Kérwá |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/101669 |
| Acceso en línea: | https://hdl.handle.net/10669/101669 |
| Palabra clave: | Urban ecology vocalizations reproduction urban birds bird songs phenology pollution |