Morfologia e desenvolvimento do sistema reprodutor em três espécies de Isoptera

• Ano de defesa: 2015
• Autor(a) principal: Laranjo, Lara Teixeira [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Termites; Térmita; Aparelho genital; Morfologia
• Link de acesso: http://hdl.handle.net/11449/134092; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/14-01-2016/000856124.pdf

Kings of Isoptera supply large quantities of viable sperm to the queens. Nevertheless, the study of the male reproductive system of these insects has been neglected when compared to that of females. In order to fill this gap, this research aimed a comparative study of the reproductive system in different ages of termite males, including nymphs and winged reproductives. Thus, three species were chosen from three families that have different evolutionary positions: Cryptotermes brevis, Coptotermes gestroi and Silvestritermes euamignathus. Chapter I emphasized the production of sperm and development of seminal vesicles in last instar nymphs, alates and 6-month and 1-year-old kings of C. brevis. In nymphs, the sperm are restricted to the testicles. Chapter II focuses primarily on the histochemistry and ultrastructure of the seminal vesicles of C. gestroi and records the beginning of spermatogenesis in 3rd instar nymphs, even though 5th instar nymphs have not stored sperm in the seminal vesicles. In this species, individualized seminal vesicles have a secretory distal region and a proximal region with sperm storage function. In addition, the histochemistry showed polysaccharides and proteins present in the secretion of these structures at the distal region. In Chapter III, the evolution of the reproductive system in male of S. euamignathus was followed. The results showed an early maturation of the reproductive system of males and the increasing sperm production in kings of mature colonies. Additionally, morphological and histochemical data allowed us to infer that the seminal vesicles of kings function more likely as a sperm storage organ than secretory structures. Chapter IV is dedicated to an analysis of the gonads of replacement reproductives, which were collected in three different colonies of C. brevis. Colonies A and B were formed by a couple containing a neotenic and a primary reproductive. The primary king and the neotenic king showed ...