Egg laying patterns and egg development of the butterfly Actinote brylla (Heliconiinae: Acraeini)
Ednaldo F Silva Filho and Ronaldo B Francini
The increase in global temperature will directly affect the phenology of insects and other ectothermic organisms. Understanding how temperature will affect these organisms is necessary to make conservation decisions. Butterflies are indicated as biological models to assess abiotic pressures. This paper describes the influence of temperature on egg development of the Actinote brylla butterfly. Egg-clusters were searched on seven sites in the study area. During immature rearing temperature was continuously monitored by an Arduino Uno-based datalogger with a digital temperature sensor programmed to record environmental temperature at each minute. Statistical analyzes were performed using R software packages. Mean accumulated degree-days during development of 92 recent eggs clusters collected during winter in six sites in the study area ranged from 362.5°C to 385.6°C in a mean temperature interval that ranged from 21.8°C to 22.3°C. The development of Actinote brylla eggs responded positively to temperature increase. Female egg-laying concentrated in the week from July, 7 to July, 13, responding to the increase of day length and the fall of mean temperature.