. The Canadian field-naturalist. Natural history. 198 The Canadian Field-Naturalist Vol. 109. Female turtles ⢠- in marshes .â².-under banks â - in open water :)C - under f Male turtles ^^- under banks ^ - under logs Figure 4. Wintering sites of 11 female and 4 male Snapping Turtles as determined by radio-telemetry in the current study at Cootes Paradise, Ontario, 1990-1991. Brown (1992) that Snapping Turtles in Algonquin Park, in an environment of low primary production, maintain a lower metabolism to conserve energy and depress food needs. Snapping Turtles in Algonquin Park spend a great de
. The Canadian field-naturalist. Natural history. 198 The Canadian Field-Naturalist Vol. 109. Female turtles ⢠- in marshes .â².-under banks â - in open water :)C - under f Male turtles ^^- under banks ^ - under logs Figure 4. Wintering sites of 11 female and 4 male Snapping Turtles as determined by radio-telemetry in the current study at Cootes Paradise, Ontario, 1990-1991. Brown (1992) that Snapping Turtles in Algonquin Park, in an environment of low primary production, maintain a lower metabolism to conserve energy and depress food needs. Snapping Turtles in Algonquin Park spend a great deal of time at tem- peratures lower than those preferred in a laboratory setting (Brown et al. 1990; Brown and Brooks 1991). Feeding activity of Slider Turtles is stimulat- ed by elevated temperatures in the laboratory (Parmenter 1980). It is possible that Snapping Turtles in Cootes Paradise may be eating more, and, therefore, foraging more despite eutrophic condi- tions because the water tends to be warmer (Galbraith et al. 1988; Brown et al. 1994). Snapping Turtles eat a wide variety of foods including aquatic plants, insect larvae, fish, and car- rion (Alexander 1943; Lagler 1943). Some studies of the gut contents of Snapping Turtles have shown that up to 60% of their diet can be made up of aquatic and semi-aquatic plants (Alexander 1943). The Algonquin Provincial Park site has abundant aquatic and semi-aquatic vegetation (Obbard and Brooks 1981) whereas Cootes Paradise does not. Cootes Paradise contains many large, slow moving fishes and regular migrations of spawning Lake Ontario fishes which may provide more abundant food resources to the foraging turtle. The question is: how do different resources and foraging patterns affect home range and movements? Generally, vegetation is less nutritious than animal food and herbivorous species or populations of turtles grow more slowly than carnivorous ones (Gibbons 1967; Hart 1982; MacCullogh and Secoy 1983). It is well documen
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