Bioassessment using benthic macroinvertebrates of the water quality in the Tigreiro river, Jacuí Basin - doi: 10.4025/actascibiolsci.v35i4.18934. Acta Sci. Biol. Sci. 2013;35(4):521-529. doi:10.4025/actascibiolsci.v35i4.18934