Critique de la méthode de distinction entre poissons anadromes et dulcicoles de la même espèce par la teneur en strontium de leurs écailles

Abstract

It was not always possible to distinguish between saltwater and freshwater brook char, Salvelinus fontinalis, based on strontium content of scales because of high intra-group variability and low inter-group variability. This method of discrimination between anadromous and freshwater forms should be used with great care. It does not seem possible to determine the freshwater conditions that an anadromous char had previously met by the separate analysis of different parts of the scales. The strontium content of the scales of the saltwater char did not decrease after they were returned to freshwater.