Turkeys prefer fluorescent light with supplementary ultraviolet radiation

Turkeys are usually reared under incandescent or fluorescent lamps which emit minimal radiation in the ultraviolet region. Because turkeys have the capacity to be visually sensitive to ultraviolet radiation (UV), this possibly makes such light sources unsuited to the visual ecology of turkeys. Previous work showed that providing UV in conjunction with straw and visual […]

UV (280 to 400 nm) optical properties in a Norwegian fjord system and an intercomparison of underwater radiometers

The depth to which solar ultraviolet (UV) radiation penetrates water columns is highly variable. The range in diffuse attenuation coefficients observed in the clearest ocean waters versus small oligotrophic lakes can be as much as 3 orders of magnitude. In this study, we investigated the variability of UV penetration (and its sources) in a typical […]

Effects of ultraviolet radiation on amphibians field experiments

Numerous reports suggest that populations of amphibians from a wide variety of locations are experiencing population declines and/or range reductions. In some cases, unusually high egg mortality has been reported. Field experiments have been used with increasing frequency to investigate ultraviolet radiation as one of the potential factors contributing to these declines. Results from field […]

The effects of ultraviolet radiation on the biology of amphibians

Potential causes for the global decline of amphibians include habitat loss, disease, environmental contaminants and climate changes. The diminishing ozone layer and consequent increase of ultraviolet-B radiation reaching the earth’s surface has been hypothesized to be a mortality factor, especially in habitats otherwise undisturbed. We discuss the fundamental physics of UV and types of biological […]