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Effects of exposition of aluminium and manganese on gonad steroidogenesis in males of Astyanax bimaculatus (Teleostei: Characidae)

Grant number: 11/15056-6
Support type:Scholarships in Brazil - Master
Effective date (Start): March 01, 2012
Effective date (End): February 28, 2014
Field of knowledge:Biological Sciences - Physiology - Compared Physiology
Principal researcher:Renata Guimarães Moreira Whitton
Grantee:Bianca Mayumi Silva Kida
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:08/57687-0 - Effects of global climate change of the Brazilian fauna: a conservation physiology approach, AP.PFPMCG.TEM


Currently, metals have been responsible for contamination of aquatic ecosystems. In this context it is included aluminum (Al) and manganese (Mn), as result of human actions that cause changes in aquatic environments, such as the decline of natural fish populations and deleterious effects on aquatic organisms. Among these effects, we can highlight the changes in respiratory, metabolic and endocrine systems, the latter being the focus of this project, since metals can act as endocrine disrupters. Some studies show that both metals are able to alter the concentrations of gonadotropins and gonadal steroid hormones, apart from altering the hypothalamic functions, leading to damage to reproduction in females. Considering these endocrine changes in female fish, we will examine the effects caused by metals (Al and Mn) on the concentration of steroid hormones: testosterone, 11-cetotestosterona, 17±-hydroxyprogesterone, estradiol and cortisol in adult male of "lambari do rabo amarelo" (Astyanax bimaculatus Linnaeus, 1758), as well as analysis of the presence of vitellogenin in the mucus, an important biomarker of endocrine disruptors with estrogenic activity. Since data on the influence of these metals on the reproductive physiology of fish are scarce, especially in males, this study will provide important data on the influence of metals on the endocrine system of fish, and may contribute to future studies aimed at greater ecological amplitude, aiming the reproductive success of these animals and thus the perpetuation of the species.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SILVA KIDA, BIANCA MAYUMI; ABDALLA, RAISA PEREIRA; MOREIRA, RENATA GUIMARAES. Effects of acidic water, aluminum, and manganese on testicular steroidogenesis in Astyanax altiparanae. FISH PHYSIOLOGY AND BIOCHEMISTRY, v. 42, n. 5, p. 1347-1356, . (11/15056-6, 12/50918-1, 08/57687-0)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
KIDA, Bianca Mayumi Silva. Influence of acidic pH, aluminum and manganese on reproductive physiology of Astyanax bimaculatus males (Characiformes: Characidae). 2014. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Biociências (IBIOC/SB) São Paulo.

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