Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Demography of an Island Population of Spotted Turtles (Clemmys guttata) at the Species' Northern Range Limit

Dan J. Reeves and Jacqueline D. Litzgus
Northeastern Naturalist
Vol. 15, No. 3 (2008), pp. 417-430
Published by: Eagle Hill Institute
Stable URL: http://www.jstor.org/stable/25177123
Page Count: 14
  • Read Online (Free)
  • Download ($14.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Demography of an Island Population of Spotted Turtles (Clemmys guttata) at the Species' Northern Range Limit
Preview not available

Abstract

Demographic information from geographically isolated conspecific populations is important for understanding how a species is locally adapted, and can thus inform conservation decisions. Clemmys guttata (Spotted Turtle) is declining throughout its range in eastern North America due to habitat loss and fragmentation and collection of specimens for the pet trade. The objectives of our study were to describe the demography of a previously unstudied island population of Spotted Turtles and to make comparisons to conspecific mainland populations. We conducted mark-recapture surveys for turtles on a small (23.2-ha) island in eastern Georgian Bay, ON, Canada. Over seven sampling trips, 40 different turtles were captured 72 times: 23 females, 6 males, 10 juveniles, and 1 hatchling. Males had significantly larger straight-line carapace lengths and contour carapace lengths than females, whereas females had greater carapace heights than males. Adult females on the island were significantly smaller than females on the mainland. Density was estimated to be 1.7 turtles/ha for the entire island, and 21.4 turtles/ha in one wetland where turtles aggregated in spring. The adult sex ratio was significantly skewed in favor of females (1 male: 3.83 females). Our study provides information on the population ecology of Spotted Turtles in isolation, which is important for the creation of management plans for populations being fragmented by human activities.

Page Thumbnails

  • Thumbnail: Page 
[417]
    [417]
  • Thumbnail: Page 
418
    418
  • Thumbnail: Page 
419
    419
  • Thumbnail: Page 
420
    420
  • Thumbnail: Page 
421
    421
  • Thumbnail: Page 
422
    422
  • Thumbnail: Page 
423
    423
  • Thumbnail: Page 
424
    424
  • Thumbnail: Page 
425
    425
  • Thumbnail: Page 
426
    426
  • Thumbnail: Page 
427
    427
  • Thumbnail: Page 
428
    428
  • Thumbnail: Page 
429
    429
  • Thumbnail: Page 
430
    430