TY JOUR TI EFFECT OF HYDROLOGICAL AND HYDROCHEMICAL FACTORS ON THE INFECTIOUSNESS OF CYPRINIDS FRY WITH THE CESTODES IN THE NORTH CASPIAN SEA KW North Caspian Sea KW yearlings KW juveniles KW two-yerlings KW bream KW roach KW ligula KW digramma KW level of invasion KW environmental factors KW clanoides KW water saliniy KW temperature KW depth JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Lardygina, E.. AU Degtyareva, L.. AU Ivanov, V.. AU Konkova, A.. PY 2015 IS 2015 PB Astrakhan State Technical University