1 August 2008 Role of Trapping in Detection of a Small Bog Turtle (Glyptemys muhlenbergii) Population
Ann Berry Somers, Jennifer Mansfield-Jones
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We used data collected from a small but increasing population of bog turtles to evaluate the surveying methods for detecting such a small population and the level of trapping effort required to reliably detect it. Trapping with unbaited traps detected this small population more reliably and with less investigator-time investment than did widely used visual and manual search techniques. This population was most easily detected in May and June, but we still needed more than 9000 trap-hours of trapping effort to reach a 95% likelihood of capturing one of the turtles present. Based on our results, we suggest a standard of 20 traps per hectare for 20 days (a 20–20 rule) as an effort level that has a very high likelihood of detecting such small but potentially viable populations.

Ann Berry Somers and Jennifer Mansfield-Jones "Role of Trapping in Detection of a Small Bog Turtle (Glyptemys muhlenbergii) Population," Chelonian Conservation and Biology 7(1), 149-155, (1 August 2008). https://doi.org/10.2744/CCB-0683.1
Received: 9 November 2006; Accepted: 1 April 2008; Published: 1 August 2008
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