Temporal and spatial variation in survivorship of diamondback terrapins (Malaclemys terrapin)

Lynea R. Witczak, Jacquelyn C. Guzy, Steven J. Price, J. Whitfield Gibbons, Michael E. Dorcas

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The diamondback terrapin (Malaclemys terrapin) is a species of conservation concern that has experienced noticeable declines throughout its range. Mark-recapture studies have been conducted on terrapins at Kiawah Island, South Carolina, since 1983, and during the early 1990s, this population began to decline. Our objectives were to evaluate current spatial and temporal variation in survivorship and compare current estimates of survivorship with those calculated from 1983 to 1999 in a previous study. We used an 11-year data set (2003 to 2013) in a capture-mark-recapture analysis to estimate the survivorship of terrapins in 5 creeks. Among creeks, annual survivorship estimates ranged from 61% to 82% with no difference between the sexes. Survivorship was lower than that documented for this population in the early 1990s. Recent anthropogenic habitat modification, such as the construction of docks, roads, and housing developments, as well as activities such as crab-trapping, likely play a role in low annual survivorship. Results from this long-term study are essential for understanding terrapin population status and can inform conservation and coastal ecosystem management.

Original languageEnglish
Pages (from-to)146-151
Number of pages6
JournalChelonian Conservation and Biology
Issue number2
StatePublished - Dec 1 2014

Bibliographical note

Publisher Copyright:
© 2014 Chelonian Research Foundation.


  • Diamondback terrapin
  • Habitat modification
  • Kiawah Island
  • Long-term study
  • Mark-recapture
  • Population decline
  • South Carolina
  • Turtle

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology


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