Efficacy of different types of 'bird flight diverter' in reducing bird mortality due to collision with transmission power lines
| Autor: | Roberto Muriel, Miguel Ferrer, Manuela de Lucas, Ryan Baumbusch, Virginia Morandini, Cecilia P. Calabuig |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Veterinary medicine Collision Ecology 010604 marine biology & hydrobiology Mortality rate Confidence intervals Reducing mortality Power lines Biology 010603 evolutionary biology 01 natural sciences Bird conservation Collision risk Confidence interval Bird flight diverter Electric power transmission lcsh:QH540-549.5 Bird flight lcsh:Ecology Ecology Evolution Behavior and Systematics Bird flapper Nature and Landscape Conservation |
| Zdroj: | Global Ecology and Conservation, Vol 23, Iss, Pp e01130-(2020) Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 2351-9894 |
| Popis: | their risk of collision. However, differences in efficacy between types of devices, and in some cases conflicting results, place in question the ability of these devices to reduce collision risk to birds. Here, we investigated the efficacy of three types of flight diverters in reducing avian collision with power lines: yellow spiral, orange spiral, and flapper, additionally we used unmarked spans as a control. We recorded bird collisions and estimated removal rates of bird casualties by scavengers in three different 400 kV transmission lines comprising 133 spans in southern Spain. A total of 131 dead birds from 32 species were found. The power line and the type of marker significantly affected avian mortality. The flapper flight diverter was responsible for a 70.2% lower mean avian mortality rate (95% Confidence Interval: 50e90%), followed by the orange spiral (mean ¼ 43.7%, CI ¼ 15.8 e71.6%) and the yellow spiral (mean ¼ 40.4%, CI ¼ 2.8e78%), compared to control spans. Flappers were the only marker that showed greatest reduction in relation to non-marked spans. The flapper flight diverter showed the highest reduction in mortality and the narrowest confidence interval when tested in different environmental conditions, and thus may serve as a better alternative to the more commonly used spiral flight diverters |
| Databáze: | OpenAIRE |
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