. The Canadian field-naturalist. 172 The Canadian Field-Naturalist Vol. 103. Figure 1. Kiyi, Coregonus kiyi (from Todd (1980) by permission). Population Sizes and Trends Coregonus kiyi was commercially important in Lake Ontario until the late 1930s (Koelz 1929; Pritchard 1931; Christie 1972). Populations declined in Lake Ontario in the 1940s (Stone 1944; Christie 1972), and the last known occurrence of the species was off Oswego, New York, in 1964 (Todd 1978). Recent surveys by the United States Fish and Wildlife Service and the New York Department of Environmental Conservation have not produc
. The Canadian field-naturalist. 172 The Canadian Field-Naturalist Vol. 103. Figure 1. Kiyi, Coregonus kiyi (from Todd (1980) by permission). Population Sizes and Trends Coregonus kiyi was commercially important in Lake Ontario until the late 1930s (Koelz 1929; Pritchard 1931; Christie 1972). Populations declined in Lake Ontario in the 1940s (Stone 1944; Christie 1972), and the last known occurrence of the species was off Oswego, New York, in 1964 (Todd 1978). Recent surveys by the United States Fish and Wildlife Service and the New York Department of Environmental Conservation have not produced further specimens (T. Eckert, New York Department of Environmental Conserva- tion, Albany, New York, personal communica- tion). Coregonus kiyi is now considered extirpated in Lake Ontario (Todd 1980; W. Dentry, OMNR Lake Ontario Fisheries Assessment Unit, Picton, Ontario, personal communication). Historical information regarding trends in Kiyi populations in Lake Superior is very limited, but. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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