Development of morphofunctional changes in the ovaries of Astyanax altiparanae Garutti and Britski 2000 (Teleostei, Characidae).

Author(s)

Mônica Caroline Pavan Cassel

• Document type: Doctoral Thesis
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI)
• Defense date: 2017-03-31

Examining board members

Maria Ines Borella; Elizete Rizzo Bazzoli; Fernanda Ortis; Elizabeth Romagosa; Renata Guimarães Moreira Whitton

• Advisor: Maria Ines Borella

Abstract

This study presents: (1) an updated review on oocyte development in teleosts, the involution pathways during the process of ovarian regression, and the model species Astyanax altiparanae; (2) the description of the ovarian and germ cell morphology of A. altiparanae and the characterization of its reproductive cycle; (3) the characterization of the involution processes of follicular atresia and post-ovulatory complexes of A. altiparanae and the localization of proteins involved in the apoptosis and autophagy pathways throughout these processes. New details of the oogenesis for Astyanax species were presented in this study, and these new data seem to be applied in fish culture. In addition, A. altiparanae presents a long spawning period, with reproductive peak from October to February, and asynchronous oocyte development. Finally, there seems to be a crosstalk between autophagy and apoptosis pathways in ovarian involution processes and the regulatory pathways of these processes seem to be conserved among species of teleosts with external fertilization. (AU)

• FAPESP's process: 12/24434-7 - DEVELOPMENT OF MORPHOFUNCTIONAL CHANGES IN OVARY OF Astyanax altiparanae GARUTTI & BRITSKI, 2000 (TELEOSTEI, CHARACIDAE)
• Grantee: Monica Caroline Pavan Cassel
• Support Opportunities: Scholarships in Brazil - Doctorate