Influência da aplicação tópica de hormônio juvenil em larvas e adultos sobre a assinatura química de Mischocyttarus consimilis (Vespidae: polistinae)

Abstract

The life of insects is mediated for numerous signals can be visual, audible and chemical. These signals are used as behavioral mediators and are influenced for several factors, among which stand out the the Juvenile Hormone (HJ) that is considerate the key element in many processes of insect social life being that their effects are decisive in determination of preimaginal caste and physiology and behavioral ontogeny of social wasps adults. However, the studies which have explored this theme in social wasps of independent foundation are still rare. In this way this study had as purpose evaluate the effects of topic application of Juvenile Hormone in larvae and newly emerged females of Mischocyttarus consimilis on parameters that prove their role in determination of pre-imaginal caste and and behavioral ontogeny of adults. Topic Applications of JH were realized in larvae of different instars in order to evaluate the most sensitive time which elevation of hormone titles can produce effects more significant on cuticular chemical profiles and signals of optical character recognition of faces. Besides, the effects when applied in newly emerged females on their physiology and cuticular chemical compounds were evaluated. The results provide more evidences of that in species of social wasps of independent foundation the caste determination can be, at least in part, preimaginal, since the effects of JH application in larval stage can change the phenotype of newly emerged adults, its cuticular chemical and measure of optical character recognition of faces. The results provide more evidences of that in species of social wasps of independent foundation the caste determination can be, at least in part, pre-imaginal, since the effects of JH application in larval stage can change the phenotype of newly emerged adults, its cuticular chemical and measure of optical character recognition of faces. Another important feature is that the dependent instar effect indicates the 30 and 40 instars as those more sensitive to elevated of normal levels of JH. Their effects in adult females also were significant changing its physiology that consequently changes its behavior and finally the chemical compounds of the cuticle that signal their roles within the colony. Therefore, this results show that JH levels are so crucial to organizing of colonies of species independent foundation, as has been proven in more derived wasps, providing data to enable better understanding of the evolution of social behavior in this group of insects.