TY JOUR TI Chemical element content in bony fin rays of Acipenser gueldenstaedtii (Brandt, 1833) KW chemical elements KW concentration KW bone rays of fins KW Russian sturgeon KW age KW gender JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Zaitsev, V.. AU Chaplygin, V.. AU Kudyakov, A.. AU Ershova, T.. AU Volkova, I.. PY 2024 IS 2024 PB Astrakhan State Technical University