Raymond R. Carthy, PhD
Assistant Unit Leader - Florida Cooperative Fish and Wildlife Research Unit
Research Interests
Dr. Carthy's research centers on ecology of endangered species. His research interests involve reproductive ecology and physiology of coastal and wetland herpetofauna, with current focus on marine and freshwater turtles. He is also involved in research on threatened upland species and in conservation management oriented studies.
Teaching Interests
In addition to teaching herpetology classes centered on ecology and conservation of marine chelonids, Dr. Carthy has taught courses on bioethics and critical thinking. he is currently developing a graduate level course on coastal ecology.
Professional Experience
Assistant Unit Leader, Florida Cooperative Fish and Wildlife Research Unit, 1996-
Education and Certifications
Ph D University of Florida 1996
MS Slippery Rock University 1983
BS Manhattan College 1980
Science and Products
Filter Total Items: 60
Erratum to: Estimates of vital rates for a declining loggerhead turtle (Caretta caretta) subpopulation: implications for management
Erratum to: Mar Biol (2014) 161:2659–2668 DOI 10.1007/s00227-014-2537-0 The Open Robust Model methods used for analysis in this study were developed by Kendall and Bjorkland (2001) and Kendall (2010). The language used in this manuscript to describe formatting and implementation of data for these analyses was derived heavily from Phillips et al. (2014). Therefore, the wording in the last...
Authors
Margaret M. Lamont, Ikuko Fujisaki, Raymond R. Carthy
Determining origin in a migratory marine vertebrate: a novel method to integrate stable isotopes and satellite tracking
Stable isotope analysis is a useful tool to track animal movements in both terrestrial and marine environments. These intrinsic markers are assimilated through the diet and may exhibit spatial gradients as a result of biogeochemical processes at the base of the food web. In the marine environment, maps to predict the spatial distribution of stable isotopes are limited, and thus...
Authors
Hannah B. Vander Zanden, Anton D. Tucker, Kristen M. Hart, Margaret M. Lamont, Ikuko Fujisaki, David S. Addison, Katherine L. Mansfield, Katrina F. Phillips, Michael B. Wunder, Gabriel J. Bowen, Mariela Pajuelo, Alan B. Bolten, Karen A. Bjorndal
Estimates of vital rates for a declining loggerhead turtle (Caretta caretta) subpopulation: implications for management
Because subpopulations can differ geographically, genetically and/or phenotypically, using data from one subpopulation to derive vital rates for another, while often unavoidable, is not optimal. We used a two-state open robust design model to analyze a 14-year dataset (1998–2011) from the St. Joseph Peninsula, Florida (USA; 29.748°, −85.400°) which is the densest loggerhead (Caretta...
Authors
Margaret M. Lamont, Ikuko Fujisaki, Raymond R. Carthy
Migration, foraging, and residency patterns for Northern Gulf loggerheads: implications of local threats and international movements
Northern Gulf of Mexico (NGoM) loggerheads (Caretta caretta) make up one of the smallest subpopulations of this threatened species and have declining nest numbers. We used satellite telemetry and a switching state-space model to identify distinct foraging areas used by 59 NGoM loggerheads tagged during 2010–2013. We tagged turtles after nesting at three sites, 1 in Alabama (Gulf Shores...
Authors
Kristen M. Hart, Margaret M. Lamont, Autumn Iverson, Ikuko Fujisaki
Winter diets of immature green turtles (Chelonia mydas) on a northern feeding ground: integrating stomach contents and stable isotope analyses
The foraging ecology and diet of the green turtle, Chelonia mydas, remain understudied, particularly in peripheral areas of its distribution. We assessed the diet of an aggregation of juvenile green turtles at the northern edge of its range during winter months using two approaches. Stomach content analyses provide a single time sample, and stable isotope analyses integrate diet over a...
Authors
Natalie C. Williams, Karen A. Bjorndal, Margaret M. Lamont, Raymond R. Carthy
Spatial distribution of loggerhead turtle (Caretta caretta) emergences along a highly dynamic beach in the northern Gulf of Mexico
As coastlines change due to sea level rise and an increasing human presence, understanding how species, such as marine turtles, respond to alterations in habitat is necessary for proper management and conservation. Survey data from a major nesting beach in the northern Gulf of Mexico, where a revetment was installed, was used to assess spatial distribution of loggerhead emergences...
Authors
Margaret M. Lamont, Chris Houser
Non-USGS Publications**
Williams,N.C., Bjorndal, K. A., Lamont, M.M., Carthy, R.R. 2014. Winter diets of immature green turtles (Chelonia mydas) on a northern feeding ground: integrating stomach contents and stable isotope analyses. Estuaries and Coasts. 37:986-994.
Lamont, M.M., Fujisaki, I., Carthy, R.R. 2014. Estimates of vital rates for a declining loggerhead turtle (Caretta caretta) subpopulation: implications for mangement. Marine Biology. 161:2659–2668 DOI 10.1007/s00227-014-2537-0
Nomani, S. Z., M. K. Oli, and R.R. Carthy. 2012. Line transects by design: the influence of study design, spatial distribution and density of objects on estimates of abundance. The Open Ecology Journal. 5: 25-44.
Shamblin, B.M., A.B. Bolten, K.A. Bjorndal, P.H. Dutton, J.T. Nielsen, F.A. Abreu-Grobois, K.J. Reich. B.E. Witherington, D.A. Bagley, L.M. Ehrhart, A.D. Tucker, D.S. Addison, A. Arenas, C. Johnson, R.R. Carthy, M.M. Lamont, M.G. Dodd, M.S. Gaines, E. LaCasella, and C.J. Nairn. 2012. Expanded mitochondrial control region sequences increase resolution of stock structure among North Atlantic loggerhead turtle rookeries. Marine Ecology Progress Series,. 469:145-160.
Salmon, M., R. Carthy, C. M.F. Lohmann, K. J. Lohmann, and J. Wyneken. 2012. Collecting a sample of loggerhead sea turtle hatchlings before a natural emergence does not reduce nest productivity. Endangered Species Research. 16: 296-299. doi: 10.3354/esr00409 IP-034556
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 60
Erratum to: Estimates of vital rates for a declining loggerhead turtle (Caretta caretta) subpopulation: implications for management
Erratum to: Mar Biol (2014) 161:2659–2668 DOI 10.1007/s00227-014-2537-0 The Open Robust Model methods used for analysis in this study were developed by Kendall and Bjorkland (2001) and Kendall (2010). The language used in this manuscript to describe formatting and implementation of data for these analyses was derived heavily from Phillips et al. (2014). Therefore, the wording in the last...
Authors
Margaret M. Lamont, Ikuko Fujisaki, Raymond R. Carthy
Determining origin in a migratory marine vertebrate: a novel method to integrate stable isotopes and satellite tracking
Stable isotope analysis is a useful tool to track animal movements in both terrestrial and marine environments. These intrinsic markers are assimilated through the diet and may exhibit spatial gradients as a result of biogeochemical processes at the base of the food web. In the marine environment, maps to predict the spatial distribution of stable isotopes are limited, and thus...
Authors
Hannah B. Vander Zanden, Anton D. Tucker, Kristen M. Hart, Margaret M. Lamont, Ikuko Fujisaki, David S. Addison, Katherine L. Mansfield, Katrina F. Phillips, Michael B. Wunder, Gabriel J. Bowen, Mariela Pajuelo, Alan B. Bolten, Karen A. Bjorndal
Estimates of vital rates for a declining loggerhead turtle (Caretta caretta) subpopulation: implications for management
Because subpopulations can differ geographically, genetically and/or phenotypically, using data from one subpopulation to derive vital rates for another, while often unavoidable, is not optimal. We used a two-state open robust design model to analyze a 14-year dataset (1998–2011) from the St. Joseph Peninsula, Florida (USA; 29.748°, −85.400°) which is the densest loggerhead (Caretta...
Authors
Margaret M. Lamont, Ikuko Fujisaki, Raymond R. Carthy
Migration, foraging, and residency patterns for Northern Gulf loggerheads: implications of local threats and international movements
Northern Gulf of Mexico (NGoM) loggerheads (Caretta caretta) make up one of the smallest subpopulations of this threatened species and have declining nest numbers. We used satellite telemetry and a switching state-space model to identify distinct foraging areas used by 59 NGoM loggerheads tagged during 2010–2013. We tagged turtles after nesting at three sites, 1 in Alabama (Gulf Shores...
Authors
Kristen M. Hart, Margaret M. Lamont, Autumn Iverson, Ikuko Fujisaki
Winter diets of immature green turtles (Chelonia mydas) on a northern feeding ground: integrating stomach contents and stable isotope analyses
The foraging ecology and diet of the green turtle, Chelonia mydas, remain understudied, particularly in peripheral areas of its distribution. We assessed the diet of an aggregation of juvenile green turtles at the northern edge of its range during winter months using two approaches. Stomach content analyses provide a single time sample, and stable isotope analyses integrate diet over a...
Authors
Natalie C. Williams, Karen A. Bjorndal, Margaret M. Lamont, Raymond R. Carthy
Spatial distribution of loggerhead turtle (Caretta caretta) emergences along a highly dynamic beach in the northern Gulf of Mexico
As coastlines change due to sea level rise and an increasing human presence, understanding how species, such as marine turtles, respond to alterations in habitat is necessary for proper management and conservation. Survey data from a major nesting beach in the northern Gulf of Mexico, where a revetment was installed, was used to assess spatial distribution of loggerhead emergences...
Authors
Margaret M. Lamont, Chris Houser
Non-USGS Publications**
Williams,N.C., Bjorndal, K. A., Lamont, M.M., Carthy, R.R. 2014. Winter diets of immature green turtles (Chelonia mydas) on a northern feeding ground: integrating stomach contents and stable isotope analyses. Estuaries and Coasts. 37:986-994.
Lamont, M.M., Fujisaki, I., Carthy, R.R. 2014. Estimates of vital rates for a declining loggerhead turtle (Caretta caretta) subpopulation: implications for mangement. Marine Biology. 161:2659–2668 DOI 10.1007/s00227-014-2537-0
Nomani, S. Z., M. K. Oli, and R.R. Carthy. 2012. Line transects by design: the influence of study design, spatial distribution and density of objects on estimates of abundance. The Open Ecology Journal. 5: 25-44.
Shamblin, B.M., A.B. Bolten, K.A. Bjorndal, P.H. Dutton, J.T. Nielsen, F.A. Abreu-Grobois, K.J. Reich. B.E. Witherington, D.A. Bagley, L.M. Ehrhart, A.D. Tucker, D.S. Addison, A. Arenas, C. Johnson, R.R. Carthy, M.M. Lamont, M.G. Dodd, M.S. Gaines, E. LaCasella, and C.J. Nairn. 2012. Expanded mitochondrial control region sequences increase resolution of stock structure among North Atlantic loggerhead turtle rookeries. Marine Ecology Progress Series,. 469:145-160.
Salmon, M., R. Carthy, C. M.F. Lohmann, K. J. Lohmann, and J. Wyneken. 2012. Collecting a sample of loggerhead sea turtle hatchlings before a natural emergence does not reduce nest productivity. Endangered Species Research. 16: 296-299. doi: 10.3354/esr00409 IP-034556
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.