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.
Raymond Carthy, Ph.D.
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.
Biography
Only Raymond's five most recent publications are shown here. For more information about Raymond, including a full publications list, visit his profile page on the Florida Cooperative Fish and Wildlife Research Unit web site.
Raymond also can be reached at his Florida State University email address: ngosi@ufl.edu
Education
- Ph D University of Florida 1996
- MS Slippery Rock University 1983
- BS Manhattan College 1980
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.
Science and Products
Year Published: 2020
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...
Lamont, Margaret; Johnson, Darren; Carthy, Raymond
Year Published: 2020
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...
Iverson, Autumn; Benscoter, Allison; Fujisaki, Ikuko; Lamont, Margaret; Hart, Kristen
Year Published: 2020
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...
Swindall, Jessica E.; Ober, Holly K.; Lamont, Margaret; Carthy, Raymond R.
Year Published: 2020
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...
Swindall, Jessica E.; Ober, Holly K.; Lamont, Margaret; Carthy, Raymond R.
Year Published: 2019
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...
Swindall, Jessica E.; Ober, Holly K.; Lamont, Margaret; Carthy, Raymond
Year Published: 2019
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...
Iverson, Autumn; Fujisaki, Ikuko; Lamont, Margaret; Hart, Kristen
Year Published: 2019
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...
Broadbent, Heather A.; Grasty, Sarah E.; Hardy, Robert F.; Lamont, Margaret M.; Hart, Kristen M.; Lembke, Chad; Brizzolara, Jennifer L.; Murawski, Steven A.
Year Published: 2018
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...
Hart, Kristen M.; Iverson, Autumn R.; Fujisaki, Ikuko; Lamont, Margaret M.; Bucklin, David N.; Shaver, Donna J.
Year Published: 2018
Shared habitat use by juveniles of three sea turtle species
The first step in understanding how sympatric species share habitat is defining spatial boundaries. While home range data for juvenile sea turtles exists, few studies have examined spatial overlap of multiple species in foraging habitat. Using satellite tracking technology, we define home ranges for juveniles of 3 sea turtle species (loggerhead,...
Lamont, Margaret M.; Iverson, Autumn R.
Year Published: 2018
Overwintering behavior of juvenile sea turtles at a temperate foraging ground
Most freshwater and terrestrial turtle species that inhabit temperate environments hibernate to survive extreme cold periods. However, for sea turtles, the question of whether these species use hibernation as an overwintering strategy has not been resolved (Ultsch 2006). Felger et al. (1976) suggested that sea turtles bury themselves in...
Lamont, Margaret M.; Seay, David R.; Gault, Kathleen
Year Published: 2018
Marine threats overlap key foraging habitat for two imperiled sea turtle species in the Gulf of Mexico
Effective management of human activities affecting listed species requires understanding both threats and animal habitat-use patterns. However, the extent of spatial overlap between high-use foraging areas (where multiple marine species congregate) and anthropogenic threats is not well known. Our modeling approach incorporates data on sea turtle...
Hart, Kristen M.; Iverson, Autumn R.; Fujisaki, Ikuko; Lamont, Margaret M.; Bucklin, David N.; Shaver, Donna J.Attribution: Wetland and Aquatic Research Center, Ecosystems, Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands), Region 4: Mississippi Basin, United States of America, Gulf of Mexico
View Citation
Hart, K.M., Iverson, A.R., Fujisaki, I., Lamont, M.M., Bucklin, D., and Shaver, D.J., 2018, Marine threats overlap key foraging habitat for two imperiled sea turtle species in the Gulf of Mexico: Frontiers in Marine Science, Provisionally Accepted, https://doi.org/10.3389/fmars.2018.00336 or https://www.frontiersin.org/articles/10.3389/fmars.2018.00336/abstract.
Year Published: 2018
Temporal shift of sea turtle nest sites in an eroding barrier island beach
Shoreline changes affect functionality of a sandy beach as a wildlife habitat and coastal erosion is among the primary causes of the changes. We examined temporal shifts in locations where loggerheads placed nests in relation to coastal erosion along a barrier island beach in the northern Gulf of Mexico. We first confirmed consistency in long-term...
Fujisaki, Ikuko; Lamont, Margaret M.; Carthy, Raymond R.Attribution: Wetland and Aquatic Research Center, Ecosystems, Region 2: South Atlantic-Gulf (Includes Puerto Rico and the U.S. Virgin Islands), Region 4: Mississippi Basin
View Citation
Fujisaki, Ikuko, Lamont, Margaret, and Carthy, Ray, 2018, Temporal shift of sea turtle nest sites in an eroding barrier island beach: Ocean and Coastal Management, v. 155, p. 24-29, https://doi.org/10.1016/j.ocecoaman.2017.12.032.
Pre-USGS Publications
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