Processo de muda em aves sob influências de deferentes estágios de conservação na caatinga

Abstract

The moulting in birds requires high energy expenditure and involves complex evolutionary strategies. How areas with different conservation stages offer energy a resource differently, is the difference between conservation areas in Caatinga generates a difference in changing patterns? We evaluated changes of birds in two areas with different vegetation conservation status in the Caatinga, an area of dense vegetation of arboreal caatinga and or spaced, conserved and a shrubby savanna highly impacted by human action. Data collection efforts were concentrated in the months of February, March, April and May 2007/2008 in PRNP Almas and in the same months of 2014/2015 in EESJC. The capture of the birds was performed using mist nets over six days in the month. Birds captured were checked for the presence and development of seedling in primary and rectrices. Were realized 638 records of moult in both areas, from 60 species. Those who had N>10 in both areas were Formicivora melanogaster, Lepdocolaptes angustirostres, Hemitriccus margaritaceiventer and Lanio pileatus. There were significant differences in the amounts and intensities of seedlings between areas and periods in the four species. However, there was no difference in the length and sequence of the seedlings. Therefore, the proportional quantity and intensity seedlings appear to be influence by habitat structure and therefore the conservation state of the vegetation and experimental studies should be directed in order to verify this hypothesis.