Vocalization strucure of oriental Magpie-Robin (copsychus saularis Linnacus, 1758) along urbanization gradient in Kathmandu valley Nepal
| dc.contributor.author | Maharjan, Madhu | |
| dc.date.accessioned | 2023-09-13T10:47:11Z | |
| dc.date.available | 2023-09-13T10:47:11Z | |
| dc.date.issued | 2023 | |
| dc.description.abstract | Urbanization is an important factor for global land transformation and Nepal is one of the most rapidly urbanizing countries in the world. One of the negative impacts of urbanization and population growth is noise pollution causing various biological responses. Such anthropogenic noises cause ‘signal masking’ to the bird communities which use acoustic signals for communication. This creates obstacles for birds for communications, territory defense and mate attraction. So, this study was carried out to explore the vocal response; both calls and songs of Oriental Magpie-robin (OMR), along the urbanization gradient of Kathmandu Valley as it has lower vocal frequencies vulnerable for being masked. Thirtyone random sites were selected and differentiated into rural, suburban and urban based on the Normalized Difference Vegetation Index (NDVI) index. The vocal recordings of the OMR were made from 06:00 a.m. to 11:00 a.m. from September 2022–October 2022 for calls and February 2023–March 2023 for songs with Zoom H2n recorder and shotgun microphone. The data were extracted using Raven pro 1.6 software from spectrograms and analyzed in R Program. The minimum frequency of calls and number of elements were statistically different along the urbanization gradient. But for the songs, only the maximum frequency differed statistically. Similarly, the minimum frequency had a statistically significant positive correlation with anthropogenic noise level, whereas the number of elements of call had a negative correlation with the same. However, no significant relationship was observed with other song parameters and anthropogenic noise levels. Vegetation structure should be increased in urban areas of Kathmandu Valley to reduce the impacts of noise as vegetation acts as the sound absorbing materials. | en_US |
| dc.identifier.uri | https://hdl.handle.net/20.500.14540/19782 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Department of Zoology | en_US |
| dc.subject | Population growth | en_US |
| dc.subject | Urbanization gradient | en_US |
| dc.subject | Vocalizaion structure | en_US |
| dc.title | Vocalization strucure of oriental Magpie-Robin (copsychus saularis Linnacus, 1758) along urbanization gradient in Kathmandu valley Nepal | en_US |
| dc.type | Thesis | en_US |
| local.academic.level | Masters | en_US |
| local.institute.title | Central Department of Zoology | en_US |