Saprobic index of bivalve mollusks of families Unionidae and Sorbiculidae distributed in the aquatic ecosystems of UzbekistanKhusniddin T. Boymurodov, Khudainazar B. Yunusov, Azamat N. Egamkulov and Umidjon R. FayzullayevE3S Web Conf., 407 (2023) 01003DOI: https://doi.org/10.1051/e3sconf/202340701003