@Article{LonderoSantSegaSchu:2017:ImUVRa,
author = "Londero, James Eduardo Lago and Santos, Caroline Peripolli dos and
Segatto, Ana L{\'u}cia Anversa and Schuch, Andr{\'e} Passaglia",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal
de Santa Maria (UFSM)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Impacts of UVB radiation on food consumption of forest specialist
tadpoles",
journal = "Ecotoxicology and Environmental Safety",
year = "2017",
volume = "143",
pages = "12--18",
month = "Sept.",
keywords = "Amphibian decline, DNA damage, DNA repair, Sunlight, Treefrog,
Weight loss.",
abstract = "Solar ultraviolet radiation B (UVB) is an important environmental
stressor for amphibian populations due to its genotoxicity,
especially in early developmental stages. Nonetheless, there is an
absence of works focused on the UVB effects on tadpoles food
consumption efficiency. In this work, we investigated the effects
of the exposure to a low environmental-simulated dose of UVB
radiation on food consumption of tadpoles of the forest specialist
Hypsiboas curupi [Hylidae, Anura] species. After UVB treatment
tadpoles were divided and exposed to a visible light source or
kept in the dark, in order to indirectly evaluate the efficiency
of DNA repair performed by photolyases and nucleotide excision
repair (NER), respectively. The body mass and the amount of food
in tadpoles guts were verified in both conditions and these data
were complemented by the micronuclei frequency in blood cells.
Furthermore, the keratinized labial tooth rows were analyzed in
order to check for possible UVB-induced damage in this structure.
Our results clearly show that the body weight decrease induced by
UVB radiation occurs due to the reduction of tadpoles food
consumption. This behavior is directly correlated with the
genotoxic impact of UVB light, since the micronuclei frequency
significantly increased after treatments. Surprisingly, the
results indicate that photoreactivation treatment was ineffective
to restore the food consumption activity and body weight values,
suggesting a low efficiency of photolyases enzymes in this
species. In addition, UVB treatments induced a higher number of
breaks in the keratinized labial tooth rows, which could be also
associated with the decrease of food consumption. This work
contributes to better understand the process of weight loss
observed in tadpoles exposed to UVB radiation and emphasizes the
susceptibility of forest specialist amphibian species to
sunlight-induced genotoxicity.",
doi = "10.1016/j.ecoenv.2017.05.002",
url = "http://dx.doi.org/10.1016/j.ecoenv.2017.05.002",
issn = "0147-6513",
language = "en",
targetfile = "londero_impacts.pdf",
urlaccessdate = "28 mar. 2024"
}