Environmental relevant concentrations of glyphosate‐based herbicide as 50 µg l −1 , 300 µg l −1 and 1800 µg l −1 can affect sperm quality of yellowtail tetra fish Astyanax lacustris . Viability of sperm cells was impaired at 300 µg l −1 , a concentration that is within legal limits in U.S.A. waterbodies, while motility was impaired at 50 µg l −1 , which is the more stringent limit set in Brazilian law. Therefore, environment p...