Banca de DEFESA: CRISTIANE NIKELY SILVA PALMEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : CRISTIANE NIKELY SILVA PALMEIRA
DATA : 11/04/2017
HORA: 14:30
LOCAL: Anfiteatro das Aves-CB
TÍTULO:

THERMAL ECOLOGY AND DIET OF POPULATION OF Phyllopezus periosus RODRIGUES, 1986 (SQUAMATA, PHYLLODACTYLIDAE) IN AREA PROTECTED IN THE SEMI-ARID BRAZILIAN

PALAVRAS-CHAVES:

Habitat and microhabitat use by lizards Phyllodactylidae, diet and foraging in lizards Phyllodactylidae, thermoregulation in Caatinga lizards

PÁGINAS: 94
GRANDE ÁREA: Ciências Biológicas
ÁREA: Zoologia
RESUMO:

Phyllodactylidae, in particular the genus Phyllopezus, with the species P. pollicaris and P. periosus stands out among the families of lizards that inhabit the Brazilian semi-arid region. The first one has a wide distribution in the Caatinga and in other open Brazilian formations, while P. periosus is endemic and with restricted distribution to some Caatinga areas. Given these facts, this study aimed to record and analyze the thermal ecology, diet and mode of foraging behavior of P. periosus, in an attempt to identify factors that may influence the apparent relictual distribution of this species in the Caatinga. Two excursions were carried out in the months of July and October, with a duration of ten days each, to the Seridó Ecological Station (ESEC Seridó), Caatinga Conservation Unit in the State of Rio Grande do Norte. Forty-five specimens of P. periosus were collected for which the body temperature of the lizard and the environmental temperatures (substrate and air) were measured; all specimens were then released. For each specimen of P. periosus collected were measured the body temperature of the lizard and the environmental temperatures (substrate and air). For the analysis of the diet and feeding behavior was used the technique of forced regurgitation of the food, as well as recordings of the descriptions observed on the foraging activity of the lizards. Phyllopezus periosus used as habitat rocky outcrops with crevices, showed nocturnal habit with profile of bimodal activity, with peaks from 18:00 to 20:59h and from 01:00 to 04:59h. There was no significant difference in body temperature between males and females, but juveniles had higher body temperature than adults. The mean body temperature of 28.5 ± 2.1 °C was influenced by the temperatures of the analyzed variables, but showed a higher relation with the temperature of the substrate, demonstrating that this species is tigmothermic. In the diet, of the 31 stomachs with content, 107 prey belonging to 19 categories of food items were identified. There was a difference in diet composition between adult and juvenile specimens, but not between the sexes. The observed individuals spent on average 1.72 ± 1.94% of the time in movement (PTM) and about 0.37 ± 0.32 movements per minute (MPM), indicating the mode of foraging of the type sit-and-wait.

MEMBROS DA BANCA:
Externo ao Programa - 1121066 - ELIZA MARIA XAVIER FREIRE
Externo ao Programa - 2569078 - RAFAEL CAMILO LAIA
Externo à Instituição - LEONARDO BARROS RIBEIRO - UNIVASF