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Population Dynamics of Turtles in the Campus Lake at the University of Michigan-Dearborn. (Environmental Science & Ecology).

Population Dynamics of Turtles in the Campus Lake at the University of Michigan-Dearborn. Orin G. Gelderloos *, Sam Zorkot, and Tracy Swatsenbarg, University of Michigan-Dearborn, Department of Natural Sciences, Dearborn, MI 48128-1491; 313/593-5339

The 2.1 hectare lake at the University of Michigan-Dearborn has existed since 1915. Visual observations indicate that seven species of turtles indigenous to Michigan live in the lake. In order of abundance the seven species of turtles currently inhabiting the lake are painted turtle (Chrysemys picta marginate), snapping turtle (Chelydra serpentina), red-eared slider (Trachemys scripta elegans), spiny soft shell turtle (Trionyx spiniferus), map turtle (Grapteinys geographica), Blanding turtle (Emydoidea blandingii), and stinkpot turtle (Sternotherus odoratus). Dip nets, hoop nets, and basking traps were used in 1996, 1998, 1999, 2000, and 2001 to gather mark and recapture data. The estimated population size of each species has varied over the years. The current population estimates are painted turtle (75.4), snapping turtle (58,8 *), red-eared slider (5), spiny soft shell turtle (3), map turtle (2), Blandings turtle (1), and stinkpot turtle (1). Based on the size and age ranges of these turtles, these turtles are reproducing in this habitat. (* A five-year average due to small sample size in 2001.)

* Indicates the person who presented the paper
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Publication:Michigan Academician
Article Type:Brief Article
Geographic Code:1USA
Date:Mar 22, 2002
Words:208
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