|
|
|
|
| |
|
|
| TOZETTI,ALEXANDRO M.; MARTINS,MARCIO. |
| This study aimed at describing daily and seasonal variation in the activity of a population of South-American rattlesnakes (Crotalus durissus) in a savanna like habitat (Cerrado) in Southeastern Brazil. Seasonal and daily activities of snakes were evaluated by the number of captures of snakes during road surveys, accidental encounters, and relocations by radio-tracking. Our results show that climatic variables such as air temperature and rainfall have little influence on the activity pattern of rattlesnakes. Our findings indicate that rattlesnakes spend most of the day resting and most of the night in ambush posture. The South-American rattlesnake is active throughout the year with a discrete peak in activity of males during the matting season. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; Ethology; Squamata; Radio-track. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000301047 |
| |
|
|
| OLIVEIRA,MAURO C.L.M.; SANTOS,MAURICIO B. DOS; LOEBMANN,DANIEL; HARTMAN,ALEXANDRE; TOZETTI,ALEXANDRO M.. |
| This study aimed to verify the relationship between habitat and the composition of anuran species in dune and restinga habitats in southernmost Brazil. The habitats were sampled between April 2009 and March 2010 using pitfalls with drift fence. We have captured 13,508 individuals of 12 anuran species. Species richness was lower in the dunes and dominance was higher in the resting. Apparently the less complex plant cover, water availability, and wide daily thermal variation in dunes act as an environmental filter for frogs. This hypothesis is reinforced by the fact that the most abundant species (Physalaemus biligonigerus and Odonthoprynus maisuma) bury themselves in the sand, minimizing these environmental stresses. Despite being in the Pampa biome, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibia; Coastal dunes; Restinga; Niche. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000200575 |
| |
|
|
|
