Postglacial Colonization of the Matamek River, Quebec, by Fishes

Abstract

Since all species of fish in the Matamek River and tributaries are euryhaline and since the number of species present at any location decreases progressively from the mouth to the headwaters, recolonization must have proceeded only from the Gulf of St. Lawrence. The distribution of species in the system, especially the locations of isolated and relict populations, indicates the order in which these species arrived in the system.