Abstract
Populations of 8 to 33 thousand fish per acre weighing 32 to 174 lb/acre (mean, 120 lb/acre) were estimated in four streams tributary to the north shore of Lake Ontario. The white sucker, Catostomus commersoni, blacknose dace, Rhinicthys atratulus, creek chub, Semotilus atromaculatus, and common shiner, Notropis cornutus, utilized both pools and riffles and were most abundant. Eighteen additional species of fish were observed.