Individual study: The effect of different UV and calcium provisioning on health and fitness traits of red-eyed tree frogs (Agalychnis callidryas)
Antwis R.E., Preziosi R.E. & Fidgett A.L. (2014) The effect of different UV and calcium provisioning on health and fitness traits of red-eyed tree frogs (Agalychnis callidryas). Journal of Zoo and Aquatic Research, 2
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Amphibians: Vary quality or quantity (UV% or gradients) of enclosure lighting to simulate seasonal changes in the wild
A replicated, controlled study in 2014 in Manchester, UK found that there was no significant effect in clutch size for red-eyed tree frogs Agalychnis callidryas when given ultraviolet (UV) boost treatment, in conjunction with a diet supplemented with calcium. Two clutches were laid from two females in the background UV group (number eggs laid: 118), and four clutches from seven females in the UV boost group (184). There was no statistically significant effect of UV treatment on clutch size (background UV: 59; UV boost: 74). Frogs given the UV boost had significantly more fungal colony forming units (CFU’s) in comparison to frogs that were not UV-boosted (background UV: 2-3 CFU’s; pre-UV boost: 2 CFU’s; post-UV boost: 13 CFU’s). Forty frogs were used in four treatment groups, which started three months after their metamorphosis: background UV, 5% calcium diet; background UV, 10% calcium diet; background UV with UV boost, 5% calcium diet; background UV with UV boost, 10% calcium diet. Frogs receiving the “UV boost” treatment were put under a 300-watt Osram™ Ultra Vitalux mercury vapour sun lamp suspended 40cm above the base of the tank for 20 minutes. Breeding trials were conducted immediately after the UV boost trials.