TY - JOUR
T1 - Sexual differences in oxidative stress in two species of Neotropical manakins (Pipridae)
AU - Gomes, Andreza de Lourdes Souza
AU - Vieira, José Luiz Fernandes
AU - da Silva, José Maria Cardoso
N1 - Funding Information:
A.?L.?G.?S. and J.?L.?F.?V. thank the Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico for support, including a scholarship to the first author (114678/2009-0). The Museu Paraense Em?lio Goeldi provided logistic support to A.?L.?G.?S; J.M.C.S.?received support from the University of Miami and the Swift Action Fund. We are grateful to two anonymous reviewers whose feedback improved the manuscript. The research complied with the current laws of Brazil.
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Because of differences in energetic investments in reproduction, natural and sexual selection are expected to impact males and females differentially, driving the evolution of sexual dimorphism. Thus, males and females are predicted to also differ in how they respond to environmental stressors and how they restore and maintain body homeostasis. Oxidative stress has been suggested to be one potential indicator of the impact of environmental stressors on wildlife. In this paper, we evaluate, for the first time, the oxidative stress in two sympatric lekking species of Neotropical manakins: the Red-headed Manakin (Ceratopipra rubrocapilla) and the White-crowned Manakin (Pseudopipra pipra). Specifically, we test the hypothesis that females of these two species have higher levels of oxidative stress than males because, among Neotropical manakins, only females provide parental care. We found no support for this hypothesis. In fact, males had higher levels of oxidative stress than females. All three hypotheses (predation stress, oxidation handicap, and aerobic activity) available to explain our results have limitations, so further field and laboratory studies on oxidative stress in manakins are required.
AB - Because of differences in energetic investments in reproduction, natural and sexual selection are expected to impact males and females differentially, driving the evolution of sexual dimorphism. Thus, males and females are predicted to also differ in how they respond to environmental stressors and how they restore and maintain body homeostasis. Oxidative stress has been suggested to be one potential indicator of the impact of environmental stressors on wildlife. In this paper, we evaluate, for the first time, the oxidative stress in two sympatric lekking species of Neotropical manakins: the Red-headed Manakin (Ceratopipra rubrocapilla) and the White-crowned Manakin (Pseudopipra pipra). Specifically, we test the hypothesis that females of these two species have higher levels of oxidative stress than males because, among Neotropical manakins, only females provide parental care. We found no support for this hypothesis. In fact, males had higher levels of oxidative stress than females. All three hypotheses (predation stress, oxidation handicap, and aerobic activity) available to explain our results have limitations, so further field and laboratory studies on oxidative stress in manakins are required.
KW - Behavior
KW - Birds
KW - Neotropical forests
KW - Physiology
KW - Tropical forests
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U2 - 10.1007/s10336-019-01673-8
DO - 10.1007/s10336-019-01673-8
M3 - Article
AN - SCOPUS:85066893260
VL - 160
SP - 1151
EP - 1157
JO - Journal of Ornithology
JF - Journal of Ornithology
SN - 2193-7206
IS - 4
ER -