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. 2017 Jun 22;14(3):451–462. doi: 10.1007/s10393-017-1236-y

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Density of adult (light bars) and young (dark bars) black-tailed prairie dogs (Cynomys ludovicianus) per hectare on dust, vaccine and placebo plots on the Bulger Grazing Allotment (BGA), Meadow Springs Ranch (MSR) and Soapstone Natural Area (SNA) study blocks. Density is defined as mark–recapture abundance estimates/effective area trapped in hectares. The duration of plague activity (red horizontal bars) is shown. All error bars are 95% confidence intervals. Differences (95% confidence intervals do not include zero) in prairie dog density between the current and prior primary capture session (a), and between the current and the two prior primary capture sessions (b) are noted.