David Roche (Former Employee)
Science and Products
Capture histories and body size data for a population of mangrove diamond-backed terrapins (Malaclemys terrapin rhizophorarum) Everglades National Park, Florida, USA, 2001-2019 Capture histories and body size data for a population of mangrove diamond-backed terrapins (Malaclemys terrapin rhizophorarum) Everglades National Park, Florida, USA, 2001-2019
We used an 18-year dataset (2001 to 2019) incorporating year, sex, hurricane occurrence and sampling effort to estimate survival using Cormack–Jolly–Seber (CJS) models in Program Mark. Annual survivorship estimates were high from 2001-2003 for both sexes (91-96%) and variable from 2006-2014 (77-92%). Beginning in 2015 survival estimates exhibited a steeper decline (females: 65%, males 75...
Satellite tracking of sea turtles using Biscayne National Park, 2009-2021 Satellite tracking of sea turtles using Biscayne National Park, 2009-2021
This dataset includes details of loggerhead and green turtles captured and satellite tagged between 2009 and 2021; the turtles presented here have tracking days within Biscayne National Park. A subset of turtles was captured within Biscayne National Park, whereas others were tracked to the study site, and tagged elsewhere. The dataset contains information related to satellite tracking (e...
Green turtle (Chelonia mydas) stable isotope signatures from Dry Tortugas National Park, Florida, sampled 2008-2015 Green turtle (Chelonia mydas) stable isotope signatures from Dry Tortugas National Park, Florida, sampled 2008-2015
Stable carbon and nitrogen isotope data from green turtles sampled at Dry Tortugas National Park, FL. Dataset includes: date collected, length, tissue type, percent of isotopes, calculated values of isotopes.
Interpreting a sudden population decline in a long-lived species (Malaclemys terrapin rhizophorarum) Interpreting a sudden population decline in a long-lived species (Malaclemys terrapin rhizophorarum)
Long-term ecological studies are critical for providing insight into population dynamics and detecting population declines, particularly for species of conservation concern. However, spatiotemporal variation and logistical challenges make the identification of sudden population declines difficult. We conducted an in-water capture-mark-recapture study of mangrove diamond-backed terrapins...
Authors
Jacquelyn Guzy, Brian J. Smith, Mathew Denton, Michael Cherkiss, David Roche, Andrew G. Crowder, Kristen Hart
Not just corticosterone: Further characterization of the endocrine response of Kemp’s ridley sea turtles (Lepidochelys kempii) reveals elevated plasma aldosterone concentrations during field capture events Not just corticosterone: Further characterization of the endocrine response of Kemp’s ridley sea turtles (Lepidochelys kempii) reveals elevated plasma aldosterone concentrations during field capture events
To develop safe and effective management policies, it is important to understand the physiologic effects of fishing interactions and scientific research methods on endangered marine species. In the present study, validated assays for plasma corticosterone, free thyroxine (fT4), and aldosterone were used to assess the endocrine status of 61 presumed healthy, wild Kemp's ridley sea turtles...
Authors
Charles Innis, Katherine M. Graham, Cody Mott, Kristen Hart, David Roche, Michael Cherkiss, Elizabeth A. Burgess
Satellite tracking reveals use of Biscayne National Park by sea turtles tagged in multiple locations Satellite tracking reveals use of Biscayne National Park by sea turtles tagged in multiple locations
Although historical observations date back to the 1800’s, there is little information on sea turtle occupancy within Biscayne National Park (BNP). The park is located along the Florida reef tract and is dominated by the Gulfstream, which acts as a corridor for many marine animals. Here we used satellite telemetry to determine areas of use in BNP for two species of imperiled sea turtles...
Authors
Kristen Hart, Allison Benscoter, Haley Turner, Michael Cherkiss, Andrew Crowder, Jacquelyn Guzy, David Roche, Christopher Sasso, Glenn Goodwin, Derek Burkholder
Stable isotopes used to infer trophic position of green turtles (Chelonia mydas) from Dry Tortugas National Park, Gulf of Mexico, United States Stable isotopes used to infer trophic position of green turtles (Chelonia mydas) from Dry Tortugas National Park, Gulf of Mexico, United States
Evaluating resource use patterns for imperiled species is critical for understanding what supports their populations. Here we established stable isotope (δ13C, δ15N) values for the endangered green sea turtle (Chelonia mydas) population found within the boundaries of Dry Tortugas National Park (DRTO), south Florida, USA. There is little gene flow between turtles sampled at DRTO and in...
Authors
David Roche, Michael Cherkiss, Brian J. Smith, Derek Burkholder, Kristen Hart
Science and Products
Capture histories and body size data for a population of mangrove diamond-backed terrapins (Malaclemys terrapin rhizophorarum) Everglades National Park, Florida, USA, 2001-2019 Capture histories and body size data for a population of mangrove diamond-backed terrapins (Malaclemys terrapin rhizophorarum) Everglades National Park, Florida, USA, 2001-2019
We used an 18-year dataset (2001 to 2019) incorporating year, sex, hurricane occurrence and sampling effort to estimate survival using Cormack–Jolly–Seber (CJS) models in Program Mark. Annual survivorship estimates were high from 2001-2003 for both sexes (91-96%) and variable from 2006-2014 (77-92%). Beginning in 2015 survival estimates exhibited a steeper decline (females: 65%, males 75...
Satellite tracking of sea turtles using Biscayne National Park, 2009-2021 Satellite tracking of sea turtles using Biscayne National Park, 2009-2021
This dataset includes details of loggerhead and green turtles captured and satellite tagged between 2009 and 2021; the turtles presented here have tracking days within Biscayne National Park. A subset of turtles was captured within Biscayne National Park, whereas others were tracked to the study site, and tagged elsewhere. The dataset contains information related to satellite tracking (e...
Green turtle (Chelonia mydas) stable isotope signatures from Dry Tortugas National Park, Florida, sampled 2008-2015 Green turtle (Chelonia mydas) stable isotope signatures from Dry Tortugas National Park, Florida, sampled 2008-2015
Stable carbon and nitrogen isotope data from green turtles sampled at Dry Tortugas National Park, FL. Dataset includes: date collected, length, tissue type, percent of isotopes, calculated values of isotopes.
Interpreting a sudden population decline in a long-lived species (Malaclemys terrapin rhizophorarum) Interpreting a sudden population decline in a long-lived species (Malaclemys terrapin rhizophorarum)
Long-term ecological studies are critical for providing insight into population dynamics and detecting population declines, particularly for species of conservation concern. However, spatiotemporal variation and logistical challenges make the identification of sudden population declines difficult. We conducted an in-water capture-mark-recapture study of mangrove diamond-backed terrapins...
Authors
Jacquelyn Guzy, Brian J. Smith, Mathew Denton, Michael Cherkiss, David Roche, Andrew G. Crowder, Kristen Hart
Not just corticosterone: Further characterization of the endocrine response of Kemp’s ridley sea turtles (Lepidochelys kempii) reveals elevated plasma aldosterone concentrations during field capture events Not just corticosterone: Further characterization of the endocrine response of Kemp’s ridley sea turtles (Lepidochelys kempii) reveals elevated plasma aldosterone concentrations during field capture events
To develop safe and effective management policies, it is important to understand the physiologic effects of fishing interactions and scientific research methods on endangered marine species. In the present study, validated assays for plasma corticosterone, free thyroxine (fT4), and aldosterone were used to assess the endocrine status of 61 presumed healthy, wild Kemp's ridley sea turtles...
Authors
Charles Innis, Katherine M. Graham, Cody Mott, Kristen Hart, David Roche, Michael Cherkiss, Elizabeth A. Burgess
Satellite tracking reveals use of Biscayne National Park by sea turtles tagged in multiple locations Satellite tracking reveals use of Biscayne National Park by sea turtles tagged in multiple locations
Although historical observations date back to the 1800’s, there is little information on sea turtle occupancy within Biscayne National Park (BNP). The park is located along the Florida reef tract and is dominated by the Gulfstream, which acts as a corridor for many marine animals. Here we used satellite telemetry to determine areas of use in BNP for two species of imperiled sea turtles...
Authors
Kristen Hart, Allison Benscoter, Haley Turner, Michael Cherkiss, Andrew Crowder, Jacquelyn Guzy, David Roche, Christopher Sasso, Glenn Goodwin, Derek Burkholder
Stable isotopes used to infer trophic position of green turtles (Chelonia mydas) from Dry Tortugas National Park, Gulf of Mexico, United States Stable isotopes used to infer trophic position of green turtles (Chelonia mydas) from Dry Tortugas National Park, Gulf of Mexico, United States
Evaluating resource use patterns for imperiled species is critical for understanding what supports their populations. Here we established stable isotope (δ13C, δ15N) values for the endangered green sea turtle (Chelonia mydas) population found within the boundaries of Dry Tortugas National Park (DRTO), south Florida, USA. There is little gene flow between turtles sampled at DRTO and in...
Authors
David Roche, Michael Cherkiss, Brian J. Smith, Derek Burkholder, Kristen Hart