Morfologia e ultraestrutura do desenvolvimento ovariano em Mithracidae (Crustacea: Decapoda: Brachyura)

• Autor(a) principal: Mollemberg, Michelle
• Data de Publicação: 2017
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da USC
• Texto Completo: http://tede2.usc.br:8080/jspui/handle/tede/331
• topic: Damithrax hispidus; Damithrax tortugae; Histologia; Mithraculus forceps; Omalacantha bicornuta; Microscopia eletrônica de transmissão; Damithrax hispidus; Damithrax tortugae; Histology; Mithraculus forceps; Omalacantha bicornuta; Transmission Electron Microscopy; CIENCIAS EXATAS E DA TERRA

The knowledge about the reproductive system and the ovarian development can provide important information to establish management strategies, guidelines for conservation of population stocks and initiatives of breeding ex situ. Thus, the present study describes the morphology, histology and ultrastructure of the ovarian development of four species of Mithracidae, namely Damithrax hispidus (Herbst, 1790), Damithrax tortugae (Rathbun, 1920), Mithraculus forceps A. Milne-Edwards, 1875 and Omalacantha bicornuta (Latreille, 1825). These species presented the same ovarian maturation pattern, which we considered common to the Mithracidae. Compared with other Majoidea, the pattern of mithracid ovarian development is similar to that described for other Majoidea, but with some distinct characteristics, such as the absence of direct participation of the mitochondria in the formation of the endogenous yolk. The process of oocyte development in these species is divided into three stages (rudimentary, developing and mature), with two cellular patterns observed in the developing stage. The yolk formation is composed of an endogenous initial phase followed by an exogenous phase in which the endocytic vesicles capture extracellular material. Until the present work, the ovarian development for Mithracidae family was unknown. In this way, the present study contributes to the better understanding of the reproductive process in these species, as well as providing necessary information to other studies focused on the mithracids reproductive biology