Wavelength-specific negatively phototactic responses of the burrowing mayfly larvae Ephoron virgo.
| Autor: | Mészáros Á; HUN-REN Centre for Ecological Research, Institute of Aquatic Ecology, H-1113 Budapest, Karolina út 29, Hungary.; Doctoral School of Environmental Sciences, Eötvös University, H-1117 Budapest, Pázmány sétány 1, Hungary., Kriska G; HUN-REN Centre for Ecological Research, Institute of Aquatic Ecology, H-1113 Budapest, Karolina út 29, Hungary.; Group for Methodology in Biology Teaching, Biological Institute, Eötvös University, H-1117 Budapest, Pázmány sétány 1, Hungary.; MTA-ÖK Lendület 'Momentum' Fluvial Ecology Research Group, H-1113 Budapest, Karolina út 29, Hungary., Egri Á; HUN-REN Centre for Ecological Research, Institute of Aquatic Ecology, H-1113 Budapest, Karolina út 29, Hungary.; MTA-ÖK Lendület 'Momentum' Fluvial Ecology Research Group, H-1113 Budapest, Karolina út 29, Hungary. |
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| Jazyk: | angličtina |
| Zdroj: | The Journal of experimental biology [J Exp Biol] 2024 May 15; Vol. 227 (10). Date of Electronic Publication: 2024 May 21. |
| DOI: | 10.1242/jeb.247142 |
| Abstrakt: | Mayflies are typically negatively phototactic during larval development, whereas the adults possess positive phototaxis. However, no extensive research has been done into the wavelength dependence of phototaxis in any mayfly larvae. We measured the repellency rate of Ephoron virgo larvae to light as a function of wavelength in the 368-743 nm spectral range. We established that the magnitude of repellence increased with decreasing wavelength and the maximal responses were elicited by 400 nm violet light. This wavelength dependence of phototaxis is similar to the recently reported spectral sensitivity of positive phototaxis of the twilight-swarming E. virgo adults. Negative phototaxis not only facilitates predation evasion: avoidance of the blue-violet spectral range could also promote the larvae to withdraw towards the river midline in the case of a drop in the water level, when the underwater light becomes enriched with shorter wavelengths as a result of the decreasing depth of overhead river water. Competing Interests: Competing interests The authors declare no competing or financial interests. (© 2024. Published by The Company of Biologists Ltd.) |
| Databáze: | MEDLINE |
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