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| Carvalho,André L. G. de; Araújo,Alexandre F. B. de; Silva,Hélio R. da. |
| This study concerns the patterns of parasitism by the larvae of Eutrombicula alfreddugesi (Oudemans, 1910) on three species of Tropidurus Wied, 1820 from Cerrado habitats of Central Brazil: T. oreadicus Rodrigues, 1987 (n = 97), T. itambere (n = 85) and T. torquatus (Wied, 1820) (two samples n = 75, n = 23). The highest prevalence value was observed in T. itambere (88.2%), followed by T. oreadicus (87.6%), and T. torquatus (17.3% and 65.2%). The most important sites of infestation were the mite pockets and skin folds, especially on the neck and inguinal region. Tropidurus itambere Rodrigues, 1987 was the most heavily parasitized species (mean intensity of infestation: 36.67 ± 41.09), followed by T. oreadicus (15.38 ± 21.08), and T. torquatus from Unaí,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lizards; Mites; Ectoparasitism. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000400005 |
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| Carvalho,André L. G. de; Silva,Hélio R. da; Araújo,Alexandre F. B. de; Alves-Silva,Ricardo; Silva-Leite,Roberta R. da. |
| We compared the effects of habitat disturbance on the feeding ecology of two local populations of Tropidurus torquatus (Wied, 1820) in restinga habitats on Ilha da Marambaia, Southeastern Brazil. Both populations presented a relatively diverse diet and differ in the number (D Max = 0.22, DF = 2, p = 0.00) and volume of prey consumed (D Max = 0.82, DF = 2, p = 0.00). Ants were the most frequent and numerous preys in both areas, and plant matter and coleopterans were the most important alimentary items in volume. The population from the disturbed area presented a larger niche breadth for number of prey items consumed (Bi num = 3.06) and volume (Bi vol = 2.98), when compared to the other population (Bj num = 2.44, Bj vol = 1.52). Niche overlap was higher for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Lizards; Optimal Foraging Theory. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100029 |
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| Bastos,Eduardo G. de M.; Araújo,Alexandre F. B. de; Silva,Hélio R. da. |
| This paper documents the presence of rattlesnakes, as an invasive species, in several municipalities of the State of Rio de Janeiro. As previous registers indicate, these snakes probably invaded at least the municipality of Valença carried by floodwaters between the decades of 1950 and 1960. In the new environment, along the margins of the Rio Preto, these snakes were able to establish new populations in deforested areas turned into cattle grazing. The presence of rattlesnake in the municipality of Barra do Piraí, a municipality that has no border with Rio Preto, however, indicates that these snakes dispersal into new areas may be facilitated by open areas, represented by pastures, created after deforestations. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Habitat disturbance; Range expansion; Rattlesnake; Snake. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000300047 |
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| Silva,Hélio R. da; Benmaman,Piktor. |
| Descrevemos uma nova espécie de Hylodes da Serra Negra, Município de Santa Bárbara do Monte Verde, Minas Gerais, sudeste do Brasil. A nova espécie pertence ao grupo Hylodes lateristrigatus, apresentando as seguintes características distintivas: corpo pequeno, focinho truncado em vistas dorsal e lateral, escudos da superfície dorsal dos discos dos dedos pouco desenvolvidos, superfície dorsal do corpo e coxas marrom-oliváceo com manchas escuras no dorso e listras nas patas traseiras. A nova espécie se distingue das demais do grupo pelo número de notas e características físicas do canto de anúncio e por vocalizar tanto de dia quanto à noite. Este é o primeiro registro de vocalização noturna para o gênero. Apresentamos descrições da vocalização e informações... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Canto de anúncio; Distribuição; Sistema de drenagem; Terras altas. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000100013 |
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