Assessing sublethal effects of ultraviolet radiation in juvenile rainbow trout (Oncorhynchus mykiss).
This paper presents a method for assessing sublethal effects of ultraviolet radiation in fish. The method is based on the assumption that UV-B exposure is stressful to fish. We measured oxygen consumption in UV-B-irradiated rainbow trout juveniles using a UV-transparent respirometer chamber. In addition, we simultaneously monitored fish behavior by videotaping. We found a direct relationship between UV-B irradiance and the percentage increase in oxygen consumption. Increased swimming activity and restless behavior were also noted under UV-B irradiation. The actual mechanisms by which fish perceive UV radiation and a behavioral reaction is triggered are unknown. Based on the present study, a response to UV-A irradiation cannot be ruled out.
Alemanni
María Eugenia
ME
Laboratorio de Fotobiología, Centro Regional Universitario Bariloche, Universidad Nacional del Comahue, U.P. Universidad, 8400 San Carlos de Bariloche, Argentina.
Lozada
Mariana
M
Zagarese
Horacio E
HE
D000818:Animals; D001522:Behavior, Animal / Q000528:radiation effects; D017686:Oncorhynchus mykiss / Q000254:growth & development / Q000502:physiology*; D010101:Oxygen Consumption / Q000528:radiation effects; D013550:Swimming / Q000502:physiology; D014466:Ultraviolet Rays; D014743:Videotape Recording