TY JOUR TI Economic efficiency of forming pike perch broodstocks in fish farms of Kazakhstan KW fish farming KW pike perch KW broodstock KW larvae KW juveniles KW yearlings KW two-year-olds KW ponds KW cost KW economic efficiency JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Asylbekova, S.. AU Badryzlova, N.. AU Koyshibaeva, S.. AU Isbekov, K.. PY 2020 IS PB Astrakhan State Technical University