Study of highway construction mitigation leads down an
unexpected road: Concurrent die-offs of turtles,
salamanders, and f...
Several problems of translocation
• Generally involve moving long distances well outside
animal’s home range (Off-Site)
– ...
On-site translocation may eliminate
some of these problems
• When suitable habitat is available adjacent to area
under dev...
Box turtles good model for on-site
translocation study
• Adult survival (~95+ %) critical
to populations due to life
histo...
Methods
Study Animals
• 98 telemetered turtles in 3
groups starting in 2008 and
7 natives added in 2009
– 33 off-site
– 32...
Timeline of mortalities
•2008: Shells of incidental natives
• None sent for necropsy
•2009: Two turtles necropsied
• Both ...
Total Mortalities
• Wood Frog 2 years reproduction (1000’s)
• Salamander 2 years reproduction (100’s)
• Turtle 27 Telemete...
    Yearly Survival Estimates
Relocation Year Survival SE
On-Site 1 0.839 0.066
On-Site 2 0.913 0.059
On-Site 3 0.905 0.06...
Where does the road lead from here?
• Understand multi-
species (order)
dynamics.
• Long term
• Health assessment for
any ...
Acknowledgements
• Maryland State Highway
Administration
– Rob Shreeve
• Montgomery County Parks
• Box Turtle Advisory Gro...
Concurrent die-offs of turtles, salamanders and frogs at one site in Maryland, USA
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Concurrent die-offs of turtles, salamanders and frogs at one site in Maryland, USA

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2013 International Symposium on Ranaviruses
by Scott Farnsworth

Published in: Education, Technology
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Concurrent die-offs of turtles, salamanders and frogs at one site in Maryland, USA

  1. 1. Study of highway construction mitigation leads down an unexpected road: Concurrent die-offs of turtles, salamanders, and frogs at one site in Maryland, USA Scott D. Farnsworth1 and Richard A. Seigel2 1 School of Biological Sciences Washington State University, Pullman, WA USA 2 Department of Biological Sciences, Towson University, Towson, MD USA
  2. 2. Several problems of translocation • Generally involve moving long distances well outside animal’s home range (Off-Site) – Outbreeding depression – Unfamiliarity of where to find suitable habitat for nesting, foraging, refugia – Homing behavior – Possible disease spread – Higher mortality
  3. 3. On-site translocation may eliminate some of these problems • When suitable habitat is available adjacent to area under development • Animals are moved but remain in same population and within some portion of home range
  4. 4. Box turtles good model for on-site translocation study • Adult survival (~95+ %) critical to populations due to life history characteristics • Previous off-site translocation studies
  5. 5. Methods Study Animals • 98 telemetered turtles in 3 groups starting in 2008 and 7 natives added in 2009 – 33 off-site – 32 on-site – 40 native
  6. 6. Timeline of mortalities •2008: Shells of incidental natives • None sent for necropsy •2009: Two turtles necropsied • Both attributed to a Ranavirus •2010: Three turtles necropsied • One presumptive Ranavirus –Wetland surveilance •Lithobates sylvatica and Ambystoma sp. Apparent 100% die off comfirmed Ranavirus •2011 -- Seven turtles necropsied • All positive •Amphibians apparent 100% die off, none necropsied
  7. 7. Total Mortalities • Wood Frog 2 years reproduction (1000’s) • Salamander 2 years reproduction (100’s) • Turtle 27 Telemetered 40+ Unmarked
  8. 8.     Yearly Survival Estimates Relocation Year Survival SE On-Site 1 0.839 0.066 On-Site 2 0.913 0.059 On-Site 3 0.905 0.064 On-Site 4 0.750 0.153 Off-Site 1 0.938 0.043 Off-Site 2 0.870 0.070 Off-Site 3 0.842 0.084 Off-Site 4 0.833 0.152 Native 1 0.971 0.029 Native 2 0.828 0.070 Native 3 0.900 0.067 Native 4 1.000 0.000 Combined 1 0.918 0.028 Combined 2 0.867 0.039 Combined 3 0.883 0.041 Combined 4 0.893 0.058
  9. 9. Where does the road lead from here? • Understand multi- species (order) dynamics. • Long term • Health assessment for any translocation
  10. 10. Acknowledgements • Maryland State Highway Administration – Rob Shreeve • Montgomery County Parks • Box Turtle Advisory Group • Sandy Barnett • David Smith • Holly Shipley • USGS Wildlife Health Center – Dr. David Green – Dr. Anne Ballmann • Rich Seigel • Joel Snodgrass • Gerald Robinson • Pat Cain • Teal Richards • Nicole Wright • Allison Allen • Christine Chun • Garrett Sisson • Nathan Byer • Holly Badin

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