[Ecological characteristics of the hemoglobinograms of 3 species of sturgeons]. / Ekologicheskie osobennosti gemoglobinogramm trekh vidov osetrov.

Studies have been made on fractional composition of hemoglobin in the Russian Acipenser güldenstädti, Siberian A. baeri and Amur A. shrencki sturgeons by polyacrylamide gel disc-electrophoresis. High electrophoretic heterogeneity (6--7 components) of hemoglobin in each of the species was found together with a distinct species specificity of hemoglobinograms. The observed differences in fractional composition of hemoglobin are of an adaptive character which makes it possible to consider the Amur sturgeon as a perspective object for acclimatization in the seas of the Southern region of the USSR with lowered salinity.

[Fractional composition of serum proteins in Amur sturgeons and its evolutionary significance]. / Fraktsionnyi sostav syvorotochnykh belkov amurskikh osetrovykh i ego évoliutsionnoe znachenia.

By means of polyacrylamide gel disc-electrophoresis studies have been made on a serum proteins of the kaluga Huso dauricus and Amur sturgeon Asipenser schrencki. High electrophoretic heterogeneity (18--23 components) of serum proteins of both species was demonstrated together with ecological peculiarities of fractional composition of these proteins as compared to those in Caspian sturgeons. The described high heterogeneity of serum proteins in the ganoid fishes is particularly interesting from the standpoint of evolution of fractional composition of proteins in vertebrates. Presumably, high heterogeneity of serum proteins in the ganoids (practically comparable to that in higher vertebrates and man) is necessary for successful work of the most important biochemical system of the blood at all stages of evolutionary development of vertebrates, being of rather ancient origin.