TY JOUR TI Structure of poaching sturgeon species in the Irtysh River in 2013-2020 (according to ichthyologic examinations) KW ichthyologic examination KW Siberian sturgeon KW sterlet KW quantity KW mass KW the Irtysh River KW the Ob-Irtysh basin JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Chemagin, A.. PY 2021 IS PB Astrakhan State Technical University