Fenologia de Cosmosoma achemon (Fabricius, 1781) (Arctiini, Euchromiina) em ambiente antropizado na Amazônia Oriental

Abstract

The main objective of this study was to analyze the phenology of the species Cosmosoma achemon during a two-year period in the Eastern Amazon, Mojuí dos Campos, Pará. The samples were collected monthly, in five consecutive nights during the new moon period, between August 2015 and July. 2016 in a farming area. For the capture of the moths, light traps were used “Pennsylvania” model and two traps were placed for each night of collection, one inside the crop and one on the edge (secondary vegetation). For data analysis we used circular statistics, with significance test Rayleigh Test (Z) and Rayleigh Test (p) that demonstrated the significance of the data. A total of 512 C. achemon individuals were collected. The highest abundance of the species was found in secondary vegetation at the crop edge for both years of collection equivalent to 59.3%. The Rayleigh Test (Z) and Rayleigh Test (p) tests showed that the species does not distribute evenly throughout the year, showing that data significance was preferable to the end of the rainy season and the beginning of the less rainy season. The secondary vegetation (edge of the crop) being a heterogeneous environment, offers more places for refuges, sites for oviposition and food resources, which may have influenced the greater abundance. So far no studies have been found on the phenology of C. achemon being this pioneer, the results contained contribute to the knowledge of the distribution of the species over the years.