Journal
CANADIAN FIELD-NATURALIST
Volume 117, Issue 3, Pages 436-439Publisher
OTTAWA FIELD-NATURALISTS CLUB
DOI: 10.22621/cfn.v117i3.747
Keywords
Spotted Turtle; Clemmys guttata; demographics; growth; home range; hibernation
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Mark-recapture and radio telemetry data were collected from 1999-2001 on a population of Spotted Turtles, Clemmys guttata, near their northern limit in Ontario, Canada, and compared with a similar study conducted from 1983-1986. In 1999-2001, 32 Spotted Turtles were caught, 27 of which were adults. Females outnumbered males 3.5: 1. The carapace length (CL) of adult males (108.5 +/- 5.7 mm) and adult females (106.4 +/- 6.0 mm) did not differ significantly. A minimum of 22% of juveniles and 40% of adults marked in 1983-1984 were still alive in 1999-2001. Adult population size was estimated to be 45 (95% confidence interval: 34-78). The average size of individual adults marked in 1983 (105.6 +/- 6.0 rum CL) and recaptured during 19992001 (106.3 +/- 5.9 mm CL) did not differ significantly. There was also no signficant difference in the number of growth lines on adults caught in 1983 (12.9 +/- 2.0) and 1999 (14.0 +/- 2.3). Based on the number of growth lines in 1983, these turtles averaged a minimum of 28.9 years in 1999, but actual ages are likely greater. Summer range length averaged 233 m (range: 200-275 m), while total range length averaged 327 m (range: 275-375 m).
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