Efficiency of Surber net under different substrate and flow conditions: insights for macroinvertebrates sampling and river biomonitoringAlberto Doretto, Tiziano Bo, Francesca Bona and Stefano FenoglioKnowl. Manag. Aquat. Ecosyst., 421 (2020) 10DOI: https://doi.org/10.1051/kmae/2020001