Wavelength-specific negatively phototactic responses of the burrowing mayfly larvae Ephoron virgo.
J Exp Biol
; 227(10)2024 May 15.
Article
en En
| MEDLINE
| ID: mdl-38699809
ABSTRACT
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 368-743â
nm spectral range. We established that the magnitude of repellence increased with decreasing wavelength and the maximal responses were elicited by 400â
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.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fototaxis
/
Larva
/
Luz
Límite:
Animals
Idioma:
En
Revista:
J Exp Biol
Año:
2024
Tipo del documento:
Article
País de afiliación:
Hungria
Pais de publicación:
Reino Unido