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: 51
The incubation environment of nests deposited by a genetically distinct group of loggerhead sea turtles in Northwest Florida
The warming climate presents a challenge to conservation of all threatened and endangered species but particularly to those that exhibit temperature-dependent sex determination such as sea turtles. Changes in temperature may result in changes in the sex ratio of the population which can directly affect reproductive rate, abundance and population dynamics. The NW Atlantic loggerhead turtle populati
Authors
Margaret Lamont, Darren Johnson, Raymond Carthy
Migration corridors and threats in the Gulf of Mexico and Florida Straits for loggerhead sea turtles
Along migration corridors, animals can face natural and anthropogenic threats that differ from those in breeding and non-breeding residence areas. Satellite telemetry can aid in describing the timing and location of these migrations. We use this tool with switching state-space modeling and line kernel density estimates to identify migration corridors of post-nesting adult female loggerhead sea tur
Authors
Autumn Iverson, Allison Benscoter, Ikuko Fujisaki, Margaret Lamont, Kristen Hart
Sea turtle conservation: 10 ways you can help
Five species of sea turtle rely on Florida’s coastal and nearshore habitats for nesting during the summer months and foraging throughout the year (Figure 1).
- Loggerhead turtles, named for their large, block-shaped heads with strong jaw muscles for crushing benthic invertebrates, are the most common sea turtle species on Florida’s nesting beaches. They nest on beaches throughout much of the sta
Authors
Jessica E. Swindall, Holly K. Ober, Margaret Lamont, Raymond R. Carthy
Sea turtle conservation: Priorities for environmental education efforts
All five species of sea turtle that occur in Florida are in danger of extinction. Many of the reasons these turtles are declining are a result of people’s actions on beaches and in shallow waters. Environmental education is needed to increase awareness and appreciation for sea turtles, and to teach about the potential harmful impacts human behaviors can have on these animals. This document descri
Authors
Jessica E. Swindall, Holly K. Ober, Margaret Lamont, Raymond R. Carthy
Geometric targets for UAS Lidar
Lidar from small unoccupied aerial systems (UAS) is a viable method for collecting geospatial data associated with a wide variety of applications. Point clouds from UAS lidar require a means for accuracy assessment, calibration, and adjustment. In order to carry out these procedures, specific locations within the point cloud must be precisely found. To do this, artificial targets may be used for r
Authors
B. Wilkinson, H.A. Lassiter, A. Abd-Elrahman, Raymond Carthy, P. Ifju, E. Broadbent, N. Grimes
Coastal armoring and sea turtles: Beachfront homeowners’ opinions and intent
Florida’s dynamic beach-dune ecosystem and the structures built along the shore face threats from coastal (or shoreline) erosion, sea level rise, and inadequate regulatory protection efforts. In light of these threats, private property owners are choosing to install coastal armoring on their property to protect upland structures which can negatively impact sea turtles and their nesting habitat. Co
Authors
Melissa K. Hill, Martha C. Monroe, Raymond Carthy, Thomas T. Ankersen, Tom A. Kay
Migration routes, foraging behavior, and site fidelity of loggerhead sea turtles (Caretta caretta) satellite tracked from a globally important rookery
The Archie Carr National Wildlife Refuge, Florida, USA (27.946°N, − 80.494°W) represents one of the largest loggerhead turtle (Caretta caretta) nesting sites in the Western Hemisphere. Surprisingly, little work has been conducted to determine females’ post-nesting migratory behavior and characteristics of their foraging areas. Between 2008 and 2017, satellite telemetry was used to trace the locati
Authors
D.R. Evans, Raymond R. Carthy, S.A. Ceriani
Conservation easements and coastal armoring: Protecting sea turtle nesting habitat through property ownership
To determine the relationship between the intent of owners of homes located near sea turtle nesting beaches in the state of Florida to engage in coastal conservation easements (CCE), the theory of planned behavior (TPB), environmental identity (EI) and relevant demographics were analyzed. As CCEs are a novel application of a proven conservation tool, a statewide survey was administered to 1274 pro
Authors
M.K. Hill, M.C. Monroe, Raymond Carthy, Thomas T. Ankersen, Tom A. Kay
Informing sea turtle outreach efforts to maximize effectiveness
Most sea turtle (Cheloniidae) species worldwide are endangered or threatened, with threats causing harm to sea turtles predominantly human‐induced. Thus, prevention of further declines to these imperiled species will require alteration of human behaviors. Regulations, incentives, and environmental education are 3 strategies that could be used to alter human behavior. Our goal was to determine how
Authors
Jessica E. Swindall, Holly K. Ober, Margaret M. Lamont, Raymond Carthy
Loggerhead sea turtle (Caretta caretta) diving changes with productivity, behavioral mode, and sea surface temperature
The relationship between dive behavior and oceanographic conditions is not well understood for marine predators, especially sea turtles. We tagged loggerhead turtles (Caretta caretta) with satellite-linked depth loggers in the Gulf of Mexico, where there is a minimal amount of dive data for this species. We tested for associations between four measurements of dive behavior (total daily dive freque
Authors
Autumn Iverson, Ikuko Fujisaki, Margaret M. Lamont, Kristen Hart
West Florida shelf pipeline serves as sea turtle benthic habitat based on in-situ towed camera observations
The use of marine offshore benthic habitats by sea turtles is poorly characterized due to the difficulty of obtaining in situ data. Understanding benthic habitat use that is important to the species’ reproduction, foraging, and migrations is critical for guiding management decisions. A towed camera-based assessment survey system (C-BASS) equipped with environmental sensors was used to characterize
Authors
Heather A. Broadbent, Sarah E. Grasty, Robert F. Hardy, Margaret M. Lamont, Kristen M. Hart, Chad Lembke, Jennifer L. Brizzolara, Steven A. Murawski
Sympatry or syntopy? Investigating drivers of distribution and co‐occurrence for two imperiled sea turtle species in Gulf of Mexico neritic waters
Animals co‐occurring in a region (sympatry) may use the same habitat (syntopy) within that region. A central aim in ecology is determining what factors drive species distributions (i.e., abiotic conditions, dispersal limitations, and/or biotic interactions). Assessing the degree of biotic interactions can be difficult for species with wide ranges at sea. This study investigated the spatial ecology
Authors
Kristen M. Hart, Autumn R. Iverson, Ikuko Fujisaki, Margaret M. Lamont, David N. Bucklin, Donna J. Shaver
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
- Publications
Filter Total Items: 51
The incubation environment of nests deposited by a genetically distinct group of loggerhead sea turtles in Northwest Florida
The warming climate presents a challenge to conservation of all threatened and endangered species but particularly to those that exhibit temperature-dependent sex determination such as sea turtles. Changes in temperature may result in changes in the sex ratio of the population which can directly affect reproductive rate, abundance and population dynamics. The NW Atlantic loggerhead turtle populatiAuthorsMargaret Lamont, Darren Johnson, Raymond CarthyMigration corridors and threats in the Gulf of Mexico and Florida Straits for loggerhead sea turtles
Along migration corridors, animals can face natural and anthropogenic threats that differ from those in breeding and non-breeding residence areas. Satellite telemetry can aid in describing the timing and location of these migrations. We use this tool with switching state-space modeling and line kernel density estimates to identify migration corridors of post-nesting adult female loggerhead sea turAuthorsAutumn Iverson, Allison Benscoter, Ikuko Fujisaki, Margaret Lamont, Kristen HartSea turtle conservation: 10 ways you can help
Five species of sea turtle rely on Florida’s coastal and nearshore habitats for nesting during the summer months and foraging throughout the year (Figure 1). - Loggerhead turtles, named for their large, block-shaped heads with strong jaw muscles for crushing benthic invertebrates, are the most common sea turtle species on Florida’s nesting beaches. They nest on beaches throughout much of the staAuthorsJessica E. Swindall, Holly K. Ober, Margaret Lamont, Raymond R. CarthySea turtle conservation: Priorities for environmental education efforts
All five species of sea turtle that occur in Florida are in danger of extinction. Many of the reasons these turtles are declining are a result of people’s actions on beaches and in shallow waters. Environmental education is needed to increase awareness and appreciation for sea turtles, and to teach about the potential harmful impacts human behaviors can have on these animals. This document descriAuthorsJessica E. Swindall, Holly K. Ober, Margaret Lamont, Raymond R. CarthyGeometric targets for UAS Lidar
Lidar from small unoccupied aerial systems (UAS) is a viable method for collecting geospatial data associated with a wide variety of applications. Point clouds from UAS lidar require a means for accuracy assessment, calibration, and adjustment. In order to carry out these procedures, specific locations within the point cloud must be precisely found. To do this, artificial targets may be used for rAuthorsB. Wilkinson, H.A. Lassiter, A. Abd-Elrahman, Raymond Carthy, P. Ifju, E. Broadbent, N. GrimesCoastal armoring and sea turtles: Beachfront homeowners’ opinions and intent
Florida’s dynamic beach-dune ecosystem and the structures built along the shore face threats from coastal (or shoreline) erosion, sea level rise, and inadequate regulatory protection efforts. In light of these threats, private property owners are choosing to install coastal armoring on their property to protect upland structures which can negatively impact sea turtles and their nesting habitat. CoAuthorsMelissa K. Hill, Martha C. Monroe, Raymond Carthy, Thomas T. Ankersen, Tom A. KayMigration routes, foraging behavior, and site fidelity of loggerhead sea turtles (Caretta caretta) satellite tracked from a globally important rookery
The Archie Carr National Wildlife Refuge, Florida, USA (27.946°N, − 80.494°W) represents one of the largest loggerhead turtle (Caretta caretta) nesting sites in the Western Hemisphere. Surprisingly, little work has been conducted to determine females’ post-nesting migratory behavior and characteristics of their foraging areas. Between 2008 and 2017, satellite telemetry was used to trace the locatiAuthorsD.R. Evans, Raymond R. Carthy, S.A. CerianiConservation easements and coastal armoring: Protecting sea turtle nesting habitat through property ownership
To determine the relationship between the intent of owners of homes located near sea turtle nesting beaches in the state of Florida to engage in coastal conservation easements (CCE), the theory of planned behavior (TPB), environmental identity (EI) and relevant demographics were analyzed. As CCEs are a novel application of a proven conservation tool, a statewide survey was administered to 1274 proAuthorsM.K. Hill, M.C. Monroe, Raymond Carthy, Thomas T. Ankersen, Tom A. KayInforming sea turtle outreach efforts to maximize effectiveness
Most sea turtle (Cheloniidae) species worldwide are endangered or threatened, with threats causing harm to sea turtles predominantly human‐induced. Thus, prevention of further declines to these imperiled species will require alteration of human behaviors. Regulations, incentives, and environmental education are 3 strategies that could be used to alter human behavior. Our goal was to determine howAuthorsJessica E. Swindall, Holly K. Ober, Margaret M. Lamont, Raymond CarthyLoggerhead sea turtle (Caretta caretta) diving changes with productivity, behavioral mode, and sea surface temperature
The relationship between dive behavior and oceanographic conditions is not well understood for marine predators, especially sea turtles. We tagged loggerhead turtles (Caretta caretta) with satellite-linked depth loggers in the Gulf of Mexico, where there is a minimal amount of dive data for this species. We tested for associations between four measurements of dive behavior (total daily dive frequeAuthorsAutumn Iverson, Ikuko Fujisaki, Margaret M. Lamont, Kristen HartWest Florida shelf pipeline serves as sea turtle benthic habitat based on in-situ towed camera observations
The use of marine offshore benthic habitats by sea turtles is poorly characterized due to the difficulty of obtaining in situ data. Understanding benthic habitat use that is important to the species’ reproduction, foraging, and migrations is critical for guiding management decisions. A towed camera-based assessment survey system (C-BASS) equipped with environmental sensors was used to characterizeAuthorsHeather A. Broadbent, Sarah E. Grasty, Robert F. Hardy, Margaret M. Lamont, Kristen M. Hart, Chad Lembke, Jennifer L. Brizzolara, Steven A. MurawskiSympatry or syntopy? Investigating drivers of distribution and co‐occurrence for two imperiled sea turtle species in Gulf of Mexico neritic waters
Animals co‐occurring in a region (sympatry) may use the same habitat (syntopy) within that region. A central aim in ecology is determining what factors drive species distributions (i.e., abiotic conditions, dispersal limitations, and/or biotic interactions). Assessing the degree of biotic interactions can be difficult for species with wide ranges at sea. This study investigated the spatial ecologyAuthorsKristen M. Hart, Autumn R. Iverson, Ikuko Fujisaki, Margaret M. Lamont, David N. Bucklin, Donna J. ShaverNon-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/s00227-014-2537-0Nomani, 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.
- Data
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