Découverte, dans le sud-ouest du Québec, d'une population de cisco de lac, Coregonus artedii, frayant au printemps

Abstract

We report the discovery of a spring spawning population of cisco, Coregonus artedii, a first in North America, at lac des Ecorces in southwestern Quebec (Ottawa River basin). Two longer specimens with a higher number of gill rakers were also taken. These were probably autumn spawners. The 1st year's growth of the spring spawning ciscoes is very limited owing to their comparatively short growing period, but some catching up is done afterwards.