The results of Hydrobiological survey in Tiksi Bay of Laptev Sea are a
nalysed. Growth of individuals, structure, production and assimilation
of Bivalvs Portlandia aestuariorum, P. siliqua, Cyrtodaria kurriana a
nd Thyasira gouldi are studied. Size-weight rations have been calculat
ed. The parameters of equations for 4 species are presented.