TY JOUR TI SEASONAL AND SEXUAL FEATURES OF THE TRACE ELEMENTS COMPOSITION OF THE BODY OF the river long-toed CRAWFISH (PONTASTACUS LEPTODACTYLUS) KW long-toed crawfish KW trace elements JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Kotelnikov, A.. AU Ilyasova, G.. AU Melyakina, E.. PY 2014 IS 2014 PB Astrakhan State Technical University