Mobilization of energetic substrates in the endangered catfish Steindachneridion parahybae (Siluriformes: Pimelodidae): changes in annual reproductive cycle in captivity

Autor(es)

Tolussi, Carlos E. ^[1] ; Gomes, Aline D. ^[1] ; Ribeiro, Cristiele da S. ^[2] ; Caneppele, Danilo ^[3] ; Moreira, Renata G. ^[1] ; Honji, Renato M. ^{[1, 4]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Dept Fisiol, Rua Matao, Trav 14, N 321, BR-05508900 Sao Paulo, SP - Brazil

^[2] Univ Estadual Paulista UNESP, Fac Engn, Dept Biol & Zootecnia, Campus Ilha Solteira, Rua Moncao 226, BR-15385000 Ilha Solteira, SP - Brazil

^[3] CESP, Unidade Hidrobiol & Aquicultura, Rodovia Tamoios, Km 38, BR-12260000 Paraibuna, SP - Brazil

^[4] Univ Estadual Paulista Julio Mesquita Filho CAUNE, Ctr Aquicultura, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Neotropical Ichthyology; v. 16, n. 2 2018.
• Citações Web of Science: 0

Resumo

ABSTRACT This study aimed at analyzing the energetic substrate (ES) in the main storage tissues of Steindachneridion parahybae, throughout the reproductive cycle in captivity. Differently from wild, in captivity, feeding is not interrupted during the reproductive period, the females do not spawn spontaneously, and they are sedentary. Adult females were sampled monthly and based on their histology and gonadosomatic index (GSI), ovaries were classified into: previtellogenic (PRV), vitellogenic (VTG), and regression (REG) stages. Ovaries at the VTG stage showed higher protein and lipids levels than at the PRV stage with a positive correlation between these substrates and the GSI. Muscle was the main source of proteins transferred to the ovaries, according to the negative correlation between these organs. Lipids remained unchanged in the liver, which is an important supplier in vitellogenesis, a pattern that probably occurs due to the continuous feeding. Muscular glycogen levels were higher at the VTG and REG than at the PRV stages. Plasma triglycerides were also higher during REG, while glucose levels were more elevated during the VTG stage. These results suggest that with constant food supply, the pattern of deposition of ES in S. parahybae is different from that described for other wild potamodromous species. (AU)

• Processo FAPESP: 07/55494-7 - Controle do eixo hipotálamo-hipófise-gônadas do surubim do Paraíba Steindachneridion Parahybae (Siluriformes: Pimelodidae) em relação ao ciclo reprodutivo e à reprodução induzida em cativeiro
• Beneficiário: Renato Massaaki Honji
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 08/57687-0 - Effects of global climate change of the Brazilian fauna: a conservation physiology approach
• Beneficiário: Carlos Arturo Navas Iannini
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático