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| Enout,Alexandre M. J.; Lobato,Débora N.; Azevedo,Cristiano S. de; Antonini,Yasmine. |
| The rates of infestation by chewing lice and feather mites on Turdus leucomelas Vieillot, 1818 (Aves: Turdidae) were used to test the hypothesis of that parasitism either increases or decreases according to, reproductive and molting seasons, respectively. Samples were obtained at the State Park of Rio Preto, state of Minas Gerais, Brazil, in October and December of 2006 and in March of 2007. The dust-ruffling technique was used in to remove the parasites from the body of their hosts. Five species of chewing-lice were found on the birds, with Myrsidea sp. and Brueelia sp. being the most prevalent parasites, whereas Menacanthus eurysternus Burmeister, 1838 was the least prevalent. No statistically significant difference was found between the infestation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chewing lice; Feather mites; Feather molt; Pyrethrin. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300017 |
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| Lanna,Lucas L.; Azevedo,Cristiano S. de; Claudino,Ricardo M.; Oliveira,Reisla; Antonini,Yasmine. |
| ABSTRACT During flight, hummingbirds achieve the maximum aerobic metabolism rates within vertebrates. To meet such demands, these birds have to take in as much energy as possible, using strategies such as selecting the best food resources and adopting behaviors that allow the greatest energy gains. We tested whether hummingbirds choose sources that have higher sugar concentrations, and investigated their behaviors near and at food resources. The study was conducted at Atlantic forest remnant in Brazil, between June and December 2012. Four patches were provided with artificial feeders, containing sucrose solutions at concentrations of 5%, 15%, 25% and 35% weight/volume. Hummingbird behaviors were recorded using the ad libitum method with continuous... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Behavioral strategies; Dominance; Food resources; Subordination; Trapline. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702017000100305 |
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| Azevedo,Cristiano S. de; Young,Robert J.. |
| The antipredator training is a powerful tool now being used to help the reintroduced animals to recognise and escape from their predators. Testing the memory capacity of the animals after antipredator training is important to evaluate if the application of the training is worthwhile. A group of 15 captive-born greater rheas was studied at Belo Horizonte Zoo. Eight birds were antipredator trained and seven birds were not. After the end of the antipredator training sessions, we run four memory tests at 40, 55, 70 and 88 days after training was completed. The memory tests consisted of showing a predator model to the rheas and recording their behavioural responses. It was measured the capacity of antipredator information storage, the influence of the group... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aves; Conservation; Memory test; Naive birds; Reintroduction. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000100011 |
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