Qualitative characteristics of blood meal and feather meal in connection with the possibility of its use in fish feedSergei V. Beketov, Alexander V. Kozlov, Dmitry L. Nikiforov-Nikishin and Artem M. PlatonovBIO Web Conf., 17 (2020) 00155DOI: https://doi.org/10.1051/bioconf/20201700155