EmanuelKarl skrev:
Nattaktiva djur säger folk inte behöver uv men dagaktiva behöver. Uttryckte mig konstigt.
Fredrik89 länkade en text om UV som säger följande:
What About Nocturnal Reptiles?
It is often said that crepuscular and nocturnal species are never out in sunlight, and so they do not benefit from UV. However, so-called “nocturnal” species often do make daytime forays and some, such as the Moorish gecko (Tarentola mauritanica), can be frequently observed basking in full sunlight in the wild. Many species traditionally classified as nocturnal may in fact be cathemeral (irregularly active at any time of night or day, according to prevailing circumstances). Reptile keepers often report seeing daytime basking behavior in so-called “nocturnal” reptiles when they are provided with full-spectrum lighting.
FFRANCES M. BAINES
Some examples of Ferguson Zone allocations based on Baines et al. (2016).
In the wild, even those that are rarely active when the sun is above the horizon may spend the day resting in places where daylight, which includes UV, filters through. Many arboreal snakes and geckos hide in tree foliage or behind crevices in bark during the day. Leaf-tailed geckos (Uroplatus spp.), for example, sleep in daylight against tree trunks in Madagascar. Terrestrial reptiles may sleep in the partial shelter of undergrowth or leaf litter, or in burrows with parts of the body, often the tail, close to the entrance. Levels of UVB in these deeply shaded places may be very low, but the animals are receiving it for many hours each day. Some species also appear to have very low vitamin D3 requirements.