TY JOUR TI MORPHOLOGICAL VARIABILITY OF GRASS CARP CTENOPHARYNGODON IDELLA (VALENCIENNES, 1844) IN RESERVOIRS OF SOUTHERN KAZAKHSTAN KW population KW sample KW grass carp KW morphometric features KW artificial reproduction KW stocking KW natural reservoirs KW hatchery JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Kirichenko, O.. AU Asylbekova, S.. AU Isbekov, K.. PY 2020 IS 2020 PB Astrakhan State Technical University