@misc{10481/100675,
year = {2021},
month = {8},
url = {https://hdl.handle.net/10481/100675},
abstract = {Oxidative status has been proposed as an important ecological and evolutionary force given that pro-oxidant
metabolites damage molecules, cells and tissues, with fitness consequences for organisms. Consequently, organisms
usually face a trade-off between regulating their oxidative status and other physiological traits. However,
environmental stressors and the availability of dietary-derived antioxidants vary according to local
conditions and, thus, organisms inhabiting different habitats face different oxidative pressures. Still, there is little
information on how different environmental conditions influence the oxidative status of animals inhabiting
terrestrial environments. In this work, we examined the variation in oxidative status in the blue tit (Cyanistes
caeruleus), a bird species with hatching asynchrony. Specifically, we examined the oxidative status of the largest
and the smallest nestlings in the brood, inhabiting four forests differing in food availability and ectoparasite
prevalence. We measured lipid peroxidation (malondialdehyde; MDA) as a marker of oxidative damage, total
antioxidant capacity (Trolox-equivalent antioxidant capacity; TEAC) and antioxidant enzymatic activity (catalase,
glutathione S-transferase, glutathione peroxidase) in blood samples. The glutathione peroxidase (GPX)
activity differed among the forests, being the highest in the pine forest and the lowest in a mixed oak (Quercus)
forest in the most humid area. Lipid peroxidation was higher in larger nestlings, suggesting higher oxidative
damage with an increasing growth rate. Neither brood size, laying date, nor ectoparasites were related to the
oxidative status of nestlings. These results suggest that nest rearing conditions might shape the oxidative status of
birds, having consequences for habitat-dependent variation in regulation of oxidative status.},
organization = {The study was supported by two projects of the National Plan of the Spanish Ministry of Economy and Competitiveness (CGL2014-55969-P and CGL2017-84938-P), both financed with ERDF funds from the European Union (EU). JGB was supported by an FPU Pre-doctoral Grant (FPU18/03034) from the Spanish Ministry of Education.},
publisher = {Elsevier},
keywords = {Oxidative stress},
keywords = {Antioxidants},
keywords = {Local environment},
keywords = {Nestlings},
keywords = {Blue tit},
title = {Oxidative status of blue tit nestlings varies with habitat and nestling size},
doi = {doi.org/10.1016/j.cbpa.2021.110986},
author = {Garrido-Bautista, Jorge and Soria, Antonio and Trenzado Romero, Cristina Elena and Pérez-Jiménez, Amalia and Ros-Santaella, José Luis and Pintus, Eliana and Bernardo, Nicola and Comar, Mar and Moreno-Rueda, Gregorio},
}