TY JOUR TI SABREFISH DISTRIBUTION IN NORTHERN CASPIAN AND FACTORS INFLUENCING ITS CONCENTRATIONS DURING THE SUMMER SEASON KW sabre fish KW habitat KW fish concentration density KW trawl survey KW average catch KW abiotic environmental factors JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Kolosyuk, G.. AU Izherskaya, V.. PY 2017 IS PB Astrakhan State Technical University