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
The Bathy-drone: An autonomous unmanned drone-tethered sonar system The Bathy-drone: An autonomous unmanned drone-tethered sonar system
A unique drone-based system for underwater mapping (bathymetry) was developed at the University of Florida. The system, called the “Bathy-drone”, comprises a drone that drags, via a tether, a small vessel on the water surface in a raster pattern. The vessel is equipped with a recreational commercial off-the-shelf (COTS) sonar unit that has down-scan, side-scan, and chirp capabilities and...
Authors
Antonio L. Diaz, Andrew E. Ortega, Henry Tingle, Andres Pulido, Orlando Cordero, Marisa Nelson, Nicholas E. Cocoves, Jaejeong Shin, Raymond Carthy, Benjamin E. Wilkinson, Peter G. Ifju
Deep and machine learning image classification of coastal wetlands using unpiloted aircraft system multispectral images and lidar datasets Deep and machine learning image classification of coastal wetlands using unpiloted aircraft system multispectral images and lidar datasets
The recent developments of new deep learning architectures create opportunities to accurately classify high-resolution unoccupied aerial system (UAS) images of natural coastal systems and mandate continuous evaluation of algorithm performance. We evaluated the performance of the U-Net and DeepLabv3 deep convolutional network architectures and two traditional machine learning techniques...
Authors
Ali Gonzalez Perez, Amr Abd-Elrahman, Benjamin Wilkinson, Daniel J. Johnson, Raymond Carthy
Tidally-driven gas exchange in beaches: Implications for sea turtle nest success Tidally-driven gas exchange in beaches: Implications for sea turtle nest success
The success of individual sea turtle nests is influenced by nest location on the beach and the resulting incubation environment. Several abiotic factors affect nest incubation, and thus nest success, but tides and gas exchange are two of the most important. The effects of tides on nest success have been well documented in regard to overwash and inundation events. However, the possible...
Authors
K.M. Goforth, Raymond Carthy
Gopherus polyphemus (Gopher Tortoise) adult mortality Gopherus polyphemus (Gopher Tortoise) adult mortality
Gopherus polyphemus has typically high adult survivorship, with some populations reaching a mean annual survivorship of 93.4% (Howell et al. 2019. J. Wildl. Manage. 84:56–65). Instances of adult mortality are not commonly reported outside of large mortality events, and most often result from disease, starvation, dehydration, or chronic stress (Gates et al. 2002. Florida Sci. 65:185– 197...
Authors
Michael Palandri, Margaret M. Lamont
Genetic diversity of immature Kemp's ridley (Lepidochelys kempii) sea turtles from the northern Gulf of Mexico Genetic diversity of immature Kemp's ridley (Lepidochelys kempii) sea turtles from the northern Gulf of Mexico
The Kemp’s ridley (Lepidochelys kempii) is the world’s most endangered sea turtle species. Predominately nesting at only one beach in Mexico, this species declined to an estimated 300 females in the mid-1980s. Conservation efforts in the United States and Mexico, including a head start programme in southern Texas in which hatchlings were reared in captivity for several months before...
Authors
Margaret Lamont, Nickolas Moreno, Fatima Y. Camacho-Sanchez, H. Hugo Acosta-Sanchez, Scott Glaberman, Miguel A. Reyes-Lopez, Ylenia Chiari
Identification of the Gulf of Mexico as an important high-use habitat for leatherback turtles from Central America Identification of the Gulf of Mexico as an important high-use habitat for leatherback turtles from Central America
Endangered leatherback sea turtles (Dermochelys coriacea) are wide-ranging, long-distance migrants whose movements are often associated with environmental cues. We examined the spatial distribution and habitat use for 33 satellite-tracked leatherbacks from nesting beaches on the Caribbean coast of Costa Rica and Panama from 2004 to 2018, an important nesting population for the...
Authors
D.R. Evans, R.A. Valverde, C. Ordonez, Raymond R. Carthy
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
The Bathy-drone: An autonomous unmanned drone-tethered sonar system The Bathy-drone: An autonomous unmanned drone-tethered sonar system
A unique drone-based system for underwater mapping (bathymetry) was developed at the University of Florida. The system, called the “Bathy-drone”, comprises a drone that drags, via a tether, a small vessel on the water surface in a raster pattern. The vessel is equipped with a recreational commercial off-the-shelf (COTS) sonar unit that has down-scan, side-scan, and chirp capabilities and...
Authors
Antonio L. Diaz, Andrew E. Ortega, Henry Tingle, Andres Pulido, Orlando Cordero, Marisa Nelson, Nicholas E. Cocoves, Jaejeong Shin, Raymond Carthy, Benjamin E. Wilkinson, Peter G. Ifju
Deep and machine learning image classification of coastal wetlands using unpiloted aircraft system multispectral images and lidar datasets Deep and machine learning image classification of coastal wetlands using unpiloted aircraft system multispectral images and lidar datasets
The recent developments of new deep learning architectures create opportunities to accurately classify high-resolution unoccupied aerial system (UAS) images of natural coastal systems and mandate continuous evaluation of algorithm performance. We evaluated the performance of the U-Net and DeepLabv3 deep convolutional network architectures and two traditional machine learning techniques...
Authors
Ali Gonzalez Perez, Amr Abd-Elrahman, Benjamin Wilkinson, Daniel J. Johnson, Raymond Carthy
Tidally-driven gas exchange in beaches: Implications for sea turtle nest success Tidally-driven gas exchange in beaches: Implications for sea turtle nest success
The success of individual sea turtle nests is influenced by nest location on the beach and the resulting incubation environment. Several abiotic factors affect nest incubation, and thus nest success, but tides and gas exchange are two of the most important. The effects of tides on nest success have been well documented in regard to overwash and inundation events. However, the possible...
Authors
K.M. Goforth, Raymond Carthy
Gopherus polyphemus (Gopher Tortoise) adult mortality Gopherus polyphemus (Gopher Tortoise) adult mortality
Gopherus polyphemus has typically high adult survivorship, with some populations reaching a mean annual survivorship of 93.4% (Howell et al. 2019. J. Wildl. Manage. 84:56–65). Instances of adult mortality are not commonly reported outside of large mortality events, and most often result from disease, starvation, dehydration, or chronic stress (Gates et al. 2002. Florida Sci. 65:185– 197...
Authors
Michael Palandri, Margaret M. Lamont
Genetic diversity of immature Kemp's ridley (Lepidochelys kempii) sea turtles from the northern Gulf of Mexico Genetic diversity of immature Kemp's ridley (Lepidochelys kempii) sea turtles from the northern Gulf of Mexico
The Kemp’s ridley (Lepidochelys kempii) is the world’s most endangered sea turtle species. Predominately nesting at only one beach in Mexico, this species declined to an estimated 300 females in the mid-1980s. Conservation efforts in the United States and Mexico, including a head start programme in southern Texas in which hatchlings were reared in captivity for several months before...
Authors
Margaret Lamont, Nickolas Moreno, Fatima Y. Camacho-Sanchez, H. Hugo Acosta-Sanchez, Scott Glaberman, Miguel A. Reyes-Lopez, Ylenia Chiari
Identification of the Gulf of Mexico as an important high-use habitat for leatherback turtles from Central America Identification of the Gulf of Mexico as an important high-use habitat for leatherback turtles from Central America
Endangered leatherback sea turtles (Dermochelys coriacea) are wide-ranging, long-distance migrants whose movements are often associated with environmental cues. We examined the spatial distribution and habitat use for 33 satellite-tracked leatherbacks from nesting beaches on the Caribbean coast of Costa Rica and Panama from 2004 to 2018, an important nesting population for the...
Authors
D.R. Evans, R.A. Valverde, C. Ordonez, Raymond R. Carthy
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.