Oogenesis in Laetacara araguaiae (Ottoni and Costa, 2009) (Labriformes: Cichlidae)

Autor(es)

dos Santos-Silva, Amanda Pereira ^{[1, 2]} ; de Siqueira-Silva, Diogenes Henrique ^{[1, 3]} ; Ninhaus-Silveira, Alexandre ^[1] ; Verissimo-Silveira, Rosicleire ^[1]

Afiliação do(s) autor(es)

^[1] UNESP Univ Estadual Paulista Julio de Mesquita Fi, FEIS, Dept Biol & Zootecnia, Lab Ictiol Neotrop LINEO, Rua Moncao, 226 Zona Norte, BR-15385000 Ilha Solteira, SP - Brazil

^[2] Univ Estadual Paulista, Programa Pos Grad Ciencias Biol IB, Campus Botucatu, Sao Paulo, SP - Brazil

^[3] Univ Estadual Paulista, Programa Pos Grad Biol Anim IBILCE, Campus SJ Rio Preto, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ZYGOTE; v. 24, n. 4, p. 502-510, AUG 2016.
• Citações Web of Science: 0

Resumo

We aimed to analyze the oogenesis of adult females of the cichlid fish Laetacara araguaiae. The specimens' gonads were removed and processed for light and transmission electron microscopy. Oogenesis in L. araguaiae showed the following characteristics: a germinal epithelium with three types of oogonia (A-undifferentiated, A-differentiated and B-oogonia), oocytes at meiotic prophase stage and ovarian follicle formation. Oocytes showing primary growth with pre-vitellogenic and cortical alveolus were observed. Similar to data for other cichlids, oocytes in secondary growth or vitellogenesis were characterized by the initial deposition of yolk microgranules. The event that characterizes the maturation stage is nucleolus migration, also called the germinal vesicle, to the oocyte periphery in the direction of the micropyle. The follicular complex undergoes several changes throughout the oocyte stages. To the best of our knowledge this study is the first to describe L. araguaiae oogenesis. Moreover, this study is the first step to better understand the reproductive biology of this species, which shows great potential for use as an ornamental fish. (AU)

• Processo FAPESP: 12/13413-9 - Biologia reprodutiva do peixe de riacho Laetacara araguaiae (Perciformes, Cichlidae)
• Beneficiário: Amanda Pereira dos Santos Silva
• Modalidade de apoio: Bolsas no Brasil - Mestrado