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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.)

Integrated use of biomarkers to evaluate the reproductive physiology of Astyanax fasciatus and Hoplias malabaricus males (Teleostei: Characiformes) in polluted reservoirs

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Author(s):
Escalante-Rojas, Maria C. [1] ; Tolussi, Carlos E. [2] ; Gomes, Aline D. [1] ; Munoz-Penuela, Marcela [1] ; Brambila-Souza, Gabriela [3] ; Branco, Giovana S. [3] ; Moreira, Renata G. [1]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Inst Biociencias, Dept Fisiol, Lab Metab & Reprod Organismas Aquat, Rua Matao, Trav 14, 321, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Anhembi Morumbi, Escola Ciencias Saude, R Dr Almeida Lima, 1134, Parque Mooca, BR-03164000 Sao Paulo, SP - Brazil
[3] Univ Estadual Paulista, Ctr Aquicultura CAUNESP, V Acesso Prof Paulo Donato Castelane S-N, BR-14884900 Jaboticabal, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY; v. 208, JAN 15 2021.
Web of Science Citations: 3
Abstract

The reproductive physiology of fish can be changed by the presence of pollutants in the water, which act as endocrine disrupting compounds (EDC). We evaluated the impacts of water contaminants in polluted reservoirs acting as possible EDC on the reproductive physiology of Astyanax fasciatus and Hoplias malabaricus males. We used biomarkers with different levels of biological organization. Hoplias malabaricus adult males were collected in the summer and winter at five different sites in the Tiete River Basin: the Ponte Nova reservoir (PN), considered a reference site due to the low anthropogenic influence; the Billings reservoir (BIL) at two different branches; and the Guarapiranga reservoir (GUA) at two different branches. Astyanax fasciatus adult males were collected at PN and BIL. BIL and GUA are subjected to great anthropogenic action. We analyzed gonadal histomorphology, testosterone (T), 11-ketotestosterone (11-KT), estradiol (E2) plasma levels, and gene expression of hepatic vitellogenin (vtgA) and pituitary follicle stimulating hormone (fsh beta). In the PN reservoir (reference), the biomarkers analyzed in both species did not differ between the periods analyzed. This is an evidence that the animals keep the same reproductive activity during both seasons. The changes in the plasma concentration of gonadal steroids in both species in polluted reservoirs suggest the presence of EDC compounds in the water and/ or adjusts of the physiological setpoint to allow the reproduction in such adverse conditions. The use of vtgA as biomarker suggests the presence of estrogenic compounds, mainly in BIL, but with a more evident response of H. malabaricus. However, even considering physiological changes, both species present testes during the maturation phase that allow the reproduction in an environment with a high degree of pollution. (AU)

FAPESP's process: 17/11530-1 - Physiological adjustments of tropical teleosts in anthropogenic reservoirs
Grantee:Renata Guimarães Moreira Whitton
Support Opportunities: Regular Research Grants
FAPESP's process: 14/16320-7 - Impacts of climate/environmental change on the fauna: an integrative approach
Grantee:Carlos Arturo Navas Iannini
Support Opportunities: Research Program on Global Climate Change - Thematic Grants