. The Canadian field-naturalist. 448 The Canadian Field-Naturalist Vol. 107. 0N chrysocepholus chrysocepholus O N chrysocepholus c^^ysoc«pholus < isolepis On cfuyiocepholus isolepis Figure 2. North American distribution of the Striped Shiner, Luxilus chrysocephalus, from Gilbert (1980). its tributary streams such as Frenchman's, Ussher's, Miller, and Black Creeks. Although commonly found in tributaries to Lake Ontario in New York State (Smith 1985), the Striped Shiner was not known from tributaries to the northeastern shore of Lake Ontario until recent- ly. Disjunct populations of Striped S
. The Canadian field-naturalist. 448 The Canadian Field-Naturalist Vol. 107. 0N chrysocepholus chrysocepholus O N chrysocepholus c^^ysoc«pholus < isolepis On cfuyiocepholus isolepis Figure 2. North American distribution of the Striped Shiner, Luxilus chrysocephalus, from Gilbert (1980). its tributary streams such as Frenchman's, Ussher's, Miller, and Black Creeks. Although commonly found in tributaries to Lake Ontario in New York State (Smith 1985), the Striped Shiner was not known from tributaries to the northeastern shore of Lake Ontario until recent- ly. Disjunct populations of Striped Shiners are apparently established in eastern Ontario tributaries to Lake Ontario. A single specimen was collected in the Pigeon River, near Omemee in 1988 (ROM 55213). The Pigeon River flows into the Trent River, tributary to Lake Ontario. This location is over 100 km east of continuous Striped Shiner distribution in Ontario. Its occurrence there may be the result of an accidental introduction of baitfish (E. Holm; personal commu- nication). Many minnow species taken from south- western Ontario are commercially sold, and large cyprinids such as Striped Shiner are a favoured bait [ Goodchild, Ontario Ministry of Natural Resources (OMNR); personal communication]. Another disjunct population representing a signifi- cant extension of the range of Striped Shiner occurs approximately 150 km northeast of the Pigeon River location. Striped Shiners were first collected from Buckshot Lake, Ottawa River drainage in 1969 (OMNRL66) and were again found at this location in 1979 (ROM 38517, identification verified by E. Holm). Accidental release of baitfish also may explain its presence in Buckshot Lake. Introduction of other southwestern Ontario species are document- ed in the area (Goodchild and Tilt 1976). Determining if the limits of Striped Shiner distri- bution have changed is complicated by the fact that the species previously was not recognized as dis- tinct from the Common Shine
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