. The Canadian field-naturalist. 106 The Canadian Field-Naturalist Vol. 104. Figure 3. Distribution of the Golden Redhorse, Moxostoma erythrurum, in southern Ontario. been collected more frequently in recent years (Smith 1985). Generally, in the United States, it appears to be faring well, often stated to be the most abundant redhorse in many states (Clay 1962; Cross 1967; Eddy and Underbill 1974; Pflieger 1975). In Ohio, the Golden Redhorse has been the most widely distributed and most abundant species of Moxotoma since 1920 (Trautman 1981). It is, however, intolerant of pollutants, continuou
. The Canadian field-naturalist. 106 The Canadian Field-Naturalist Vol. 104. Figure 3. Distribution of the Golden Redhorse, Moxostoma erythrurum, in southern Ontario. been collected more frequently in recent years (Smith 1985). Generally, in the United States, it appears to be faring well, often stated to be the most abundant redhorse in many states (Clay 1962; Cross 1967; Eddy and Underbill 1974; Pflieger 1975). In Ohio, the Golden Redhorse has been the most widely distributed and most abundant species of Moxotoma since 1920 (Trautman 1981). It is, however, intolerant of pollutants, continuous turbidity and rapid siltation. Habitat The Golden Redhorse does not have particularly specialized habitat requirements and is, appar- ently, able to tolerate a fairly wide spectrum of habitat conditions. It is better adapted to river habitats than to lakes and is typically found in small to large streams and rivers with varied substrate (Lee et al. 1980). Avoidance of streams with high gradients is indicated by the paucity of records from such streams (Trautman 1981). It is associated with streams having large permanent pools. In Pennsylvania, Cooper (1983) found adult Golden Redhorse in slow deep runs of moderate- sized rivers. Kott et al. (1979) collected both Moxostoma duquesnei and Moxostoma erythru- rum in Ontario, al a site described as a stretch of swift-flowing shallow water over a gravel bottom ending in a one metre deep pool. Although frequently collected with the Black Redhorse, the Golden Redhorse prefers slightly warmer waters with less current and is more tolerant of turbidity and intermittent flow (Pflieger 1975). In spite of its ability to withstand more siltation than most redhorse species, it has been eliminated from some streams by mine wastes (Clay 1962; Trautman 1981). According to Trautman (1981), it is seldom found in waters having an abundance of aquatic vegetation and only small numbers are present in larger lakes. On the other hand, Meyer (1962) rema
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