| reproductive effects of oestrogenic endocrine disrupting chemicals in astyanax rivularis inhabiting headwaters of the velhas river, brazil. | the velhas river is the most polluted river in the state of minas gerais, south-eastern brazil. due to its historical and environmental relevance, the aim of this study was to evaluate the effects of oestrogenic endocrine disruptors on the reproduction of the lambari astyanax rivularis, a small-sized species found in headwaters of the são francisco river basin. quarterly field samplings were carried out during a reproductive cycle in three streams of the upper velhas river: s1 (reference site) a ... | 2017 | 28341464 |