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Natural gaps associated with oxidative stress in Willisornis poecilinotus (Aves: Thamnophilidae) in a tropical forest Acta Amazonica
Gomes,Andreza de Lourdes Souza; Gonçalves,Andrey Felipe Gomes; Vieira,José Luiz Fernandes; Marceliano,Maria Luiza Videiro; Silva,José Maria Cardoso da.
Natural disturbances in tropical forests modify the availability and quality of resources and alter the patterns of bird distribution. These environmental changes increase the metabolic rate and disrupt the redox balance promoting oxidative stress. This study aimed to compare the abundance of Willisornis poecilinotus between gaps and the understory of a forest with undisturbed canopy at Caxiuanã National Forest. The abundance was correlated with vegetation heights. The oxidative stress and the stress promoting factors were determined in both sites of sampling. We captured 81 specimens of W. poecilinotus. The number of captures was high in gaps. The specimens sampled at gaps showed high levels of oxidative stress. The biomarkers of oxidative stress were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidants; Environmental disturbances; Redox balance; Lipid peroxidation.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000200006
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Feeding ecology of Dash-dot Tetra Hemigrammus belottii(Steindachner 1882) (Characiformes: Characidae) in the streams of the Urucu River basin, central Amazonia, Brazil Biota Neotropica
Gonçalves,Andrey Felipe Gomes; Prudente,Bruno da Silveira; Carvalho Filho,Fernando da Silva; Montag,Luciano Fogaça de Assis.
The present study describes aspects of feeding ecology of Dash-dot TetraHemigrammus belottii (Characiformes: Characidae) collected in the Urucu River basin in Coari, Amazonas (Brazil), aims to respond the following question: What is the influence of hydrological periods (dry and wet) and spatial distribution in the diet of H. belottii? The specimens were collected between 2006 and 2009 in seven streams in the Urucu basin using standard capture methods. Their stomachs were removed for diet composition analyses. The alimentary items were weighed and identified for subsequent analyzes related to feeding intensity by repletion index (RI%) and importance by alimentary index (AIi%). A total of 227 specimens were analyzed, with a mean standard length of 16.5±5.6...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allochthonous item; Amazon basin; Trophic ecology.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000300141
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