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The possibility of the use of electropherogrames of plasma proteins in polyacrylamide slab gel in the study of populations of marine cat-fishes was examined. A total of 176 samples of plasma from four species. Sciadeichtys luniscutis. Arius spixii, Genidens genidens and Netuma barbas was used. Inter-specific as well as intra-specific differences were found and the locus E of the plasma of all the four species showed a typical dialelic variation. The locus is recommended as one of alternatives which deserve due consideration in the planing of studies of populations of these species by means of biochemical methods.

boletim do instituto oceanográfico

Estudo bioquímico e fisiológico sobre os bagres marinhos do Brasil: I. Sobre padrão eletroforético do plasma em gel de poliacrilamida dos bagres da região estuarino lagunar de Cananéia