Вестник МГТУ. 2019, Т. 22, № 2.

Vestnik of MSTU. 2019. Vol. 22, N 2 DOI: 10.21443/1560-9278-2019-22-2 / Biological Sciences C O N T E N T S Bioecology Fokina N. N., Shklyarevich G. A., Ruokolainen T. R., Nemova N. N. Ecological and biochemical monitoring of some intertidal mussel Mytilus edulis L. settlements in Kandalaksha Nature Reserve........................................................................................................................................................ 213 Chemagin A. A., Volosnikov G. I., Kyrov D. N., Liberman E. L. Heavy metals Hg, Cd, and Pb in the body of sterlet (Acipenser ruthenus L.), the Lower Irtysh River........................................................... 225 Hydrobiology Zhivoglyadova L. A., Luzhnyak O. L., Shlyakhova N. A. Hydrobiological communities of Veselovskoye water reservoir (the Manych River) in October 2016: The results of studies......... 234 Ichthyology Volkova A. Yu., Huobonen M. E. Estimation of morphometric and fish-breeding biological indicators of Siberian sturgeon (Acipenser baerii Brandt) from the Lena River population, rearing in the conditions of the Far North........................................................................................................................ 243 Marine Zoology Litvinov Yu. V., Pakhomov M. V. Investigation of the ability of gray seals to differentiate composite audio signals................................................................................................................................................ 249 Minzyuk T. V. Grey seals: Morphometric parameters of erythrocytes.......................................................... 258 Yakovlev A. P., Zaytsev A. A., Ishkulov D. G., Grigoriev V. F. The influence of low-frequency electromagnetic field on the operability of gray seals............................................................................ 266 Short Communications Article Dolotov S. I., Samokhvalov I. V. Distribution and spawning area of Atlantic salmon Salmo salar L. in the River Ura (the Murmansk region)................................................................................................... 276 Zhuravleva N. G., Ishkova Е. A., Ottesen O. Saccular cells in the epidermis of Atlantic cod Gadus morhua L...................................................................................................................................................... 282 Ishkulov D. G., Ishkulova T. G. The ecological analysis of the microhemipopulations of trematode parthenites: An experience......................................................................................................................... 288 Historical Essay on Ichthyology Studenova M. A., Studenov I. I. Daily rhythms of food and rations of fish living in the Belaya Kedva River (the Pechora River basin)................................................................................................................ 292