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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 6
Affiliation:
[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
Total Affiliations: 4
Document type: Journal article
Source: Neotropical Ichthyology; v. 16, n. 2 2018.
Web of Science Citations: 0
Abstract

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)

FAPESP's process: 08/57687-0 - Effects of global climate change of the Brazilian fauna: a conservation physiology approach
Grantee:Carlos Arturo Navas Iannini
Support Opportunities: Research Program on Global Climate Change - Thematic Grants