Banca de DEFESA: THANYRIA POLLYNEIDE FRANÇA CÂMARA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : THANYRIA POLLYNEIDE FRANÇA CÂMARA
DATA : 31/03/2017
HORA: 14:00
LOCAL: Anfiteatro das aves-CB
TÍTULO:

DEMOGRAPHY OF Tangara cayana (THRAUPIDAE) IN A FRAGMENT OF RESTINGA IN THE EXTREME NORTH OF DISTRIBUTION OF THE ATLANTIC FOREST

PALAVRAS-CHAVES:

Apparent Survival, Tropical Birds, Temporary Dispersion, Robust Design, MARK.

 

PÁGINAS: 37
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

For many decades, ornithologists have sought to understand how species differentiate their life history traits, both between populations and between species, through an environmental gradient, thus leading to demographic studies around the world. However, there are still gaps in information about life history traits for species in tropical regions, as well as variables that influence them. Efficient conservation and management programs depend on this type of information. We measured demographic parameters of a tropical Thraupide, Tangara cayana, in the northern end of the Atlantic Forest distribution. We estimated apparent survival, detection, dispersion and population size, also testing how transient individuals, rainfall, and sex of individuals influenced population survival rates. We insert historical capture-mark-recapture in the MARK program, following the method of Robust Design. Between November 2010 and November 2014 we marked 127 individuals of T. cayana, from which we could observe a lower annual survival of transients (2% to 4%), followed by young (12% to 34%) and adults (males = 29% to 54%, females = 30% to 55%). The dispersion parameters (y’= 71%, y” = 73%) and detection (capture = 26%, recapture = 5%) were constant, with no temporal variation. The population density was 1.7 individuals / ha. We find a negative relationship between rainfall and survival. The demographic parameters estimated showed low values for a tropical bird, which may be linked to the great capacity of dispersion of the species, leading us to the perspective that these demographic patterns are still unclear, requiring further studies on habitats in these regions.

MEMBROS DA BANCA:
Externo à Instituição - JAMES JOSEPH ROPER - UFPR
Presidente - 1439088 - MAURO PICHORIM
Externo à Instituição - SIMONE NUNES BRANDÃO - UFRN