The Development of Early Diving Behavior by Juvenile Flatback Sea Turtles (Natator depressus)

2010 ◽  
Vol 9 (1) ◽  
pp. 8-17 ◽  
Author(s):  
Michael Salmon ◽  
Mark Hamann ◽  
Jeanette Wyneken
Keyword(s):  
Sea Turtles ◽  
Diving Behavior ◽  
Natator Depressus

Migration, distribution, and diving behavior of adult male loggerhead sea turtles (Caretta caretta) following dispersal from a major breeding aggregation in the Western North Atlantic

2011 ◽  
Vol 159 (1) ◽  
pp. 113-125 ◽  
Author(s):  
Michael D. Arendt ◽  
Albert L. Segars ◽  
Julia I. Byrd ◽  
Jessica Boynton ◽  
Jeffrey A. Schwenter ◽  
...  
Keyword(s):  
Adult Male ◽  
North Atlantic ◽  
Sea Turtles ◽  
Caretta Caretta ◽  
Diving Behavior ◽  
Loggerhead Sea Turtles

scholarly journals A Baseline Model For Estimating the Risk of Gas Embolism in Sea Turtles During Routine Dives

2021 ◽  
Vol 12 ◽  
Author(s):  
Nathan J. Robinson ◽  
Daniel García-Párraga ◽  
Brian A. Stacy ◽  
Alexander M. Costidis ◽  
Gabriela S. Blanco ◽  
...  
Keyword(s):  
Cardiac Output ◽  
Marine Mammals ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Dermochelys Coriacea ◽  
Diving Behavior ◽  
Gas Embolism ◽  
Baseline Model ◽  
Leatherback Turtles

Sea turtles, like other air-breathing diving vertebrates, commonly experience significant gas embolism (GE) when incidentally caught at depth in fishing gear and brought to the surface. To better understand why sea turtles develop GE, we built a mathematical model to estimate partial pressures of N2 (PN2), O2 (PO2), and CO2 (PCO2) in the major body-compartments of diving loggerheads (Caretta caretta), leatherbacks (Dermochelys coriacea), and green turtles (Chelonia mydas). This model was adapted from a published model for estimating gas dynamics in marine mammals and penguins. To parameterize the sea turtle model, we used values gleaned from previously published literature and 22 necropsies. Next, we applied this model to data collected from free-roaming individuals of the three study species. Finally, we varied body-condition and cardiac output within the model to see how these factors affected the risk of GE. Our model suggests that cardiac output likely plays a significant role in the modulation of GE, especially in the deeper diving leatherback turtles. This baseline model also indicates that even during routine diving behavior, sea turtles are at high risk of GE. This likely means that turtles have additional behavioral, anatomical, and/or physiologic adaptions that serve to reduce the probability of GE but were not incorporated in this model. Identifying these adaptations and incorporating them into future iterations of this model will further reveal the factors driving GE in sea turtles.

Heart rates and diving behavior of leatherback sea turtles in the eastern pacific ocean

1999 ◽  
Vol 202 (9) ◽  
pp. 1115-1125 ◽  
Author(s):  
A.L. Southwood ◽  
R.D. Andrews ◽  
M.E. Lutcavage ◽  
F.V. Paladino ◽  
N.H. West ◽  
...  
Keyword(s):  
Heart Rate ◽  
Sea Turtles ◽  
Dive Depth ◽  
Dive Duration ◽  
Diving Behavior ◽  
Leatherback Turtles ◽  
Heart Rates ◽  
The Mean ◽  
Leatherback Sea Turtles ◽  
Mean Heart Rate

Heart rates and diving behavior of leatherback sea turtles (Dermochelys coriacea) were monitored at sea during the internesting interval. Instruments that recorded the electrocardiogram and the depth and duration of dives were deployed on six female leatherback turtles as they laid eggs at Playa Grande, Costa Rica. Turtles dived continually for the majority of the internesting interval and spent 57–68 % of the time at sea submerged. Mean dive depth was 19+/−1 m (mean +/− s.d.) and the mean dive duration was 7.4+/−0.6 min. Heart rate declined immediately upon submergence and continued to fall during descent. All turtles showed an increase in heart rate before surfacing. The mean heart rate during dives of 17.4+/−0.9 beats min-1 (mean +/− s.d.) was significantly lower than the mean heart rate at the surface of 24.9+/−1.3 beats min-1 (P<0.05). Instantaneous heart rates as low as 1.05 beats min-1 were recorded during a 34 min dive. The mean heart rate over the entire dive cycle (dive + succeeding surface interval; 19.4+/−1.3 beats min-1) was more similar to the heart rate during diving than to the heart rate at the surface. Although dive and surface heart rates were significantly different from each other, heart rates during diving were 70 % of heart rates at the surface, showing that leatherback turtles do not experience a dramatic bradycardia during routine diving.

The effect of incubation temperatures on nest success of flatback sea turtles (Natator depressus)

2016 ◽  
Vol 163 (7) ◽  
Author(s):  
Stephanie van Lohuizen ◽  
Jason Rossendell ◽  
Nicola J. Mitchell ◽  
Michele Thums
Keyword(s):  
Sea Turtles ◽  
Nest Success ◽  
Incubation Temperatures ◽  
Natator Depressus

scholarly journals Rehabilitated sea turtles tend to resume typical migratory behaviors: satellite tracking juvenile loggerhead, green, and Kemp’s ridley turtles in the northeastern USA

2020 ◽  
Vol 43 ◽  
pp. 133-143
Author(s):  
NJ Robinson ◽  
K Deguzman ◽  
L Bonacci-Sullivan ◽  
RA DiGiovanni ◽  
T Pinou
Keyword(s):  
New York ◽  
Sea Turtles ◽  
Long Island ◽  
Marine Species ◽  
Chelonia Mydas ◽  
Diving Behavior ◽  
Rehabilitation Programs ◽  
In The Wild ◽  
Migratory Movements ◽  
Kemp's Ridley

Wildlife rehabilitation programs are widely employed for many endangered marine species and can serve as engaging platforms for environmental outreach. However, their effectiveness at supporting populations in the wild depends on whether rescued animals can survive and reproduce after being released. Here, we assessed whether cold-stunned juvenile sea turtles resumed typical migratory and diving behaviors after rehabilitation. We deployed satellite transmitters onto 7 rehabilitated loggerhead turtles Caretta caretta, 12 green turtles Chelonia mydas, and 12 Kemp’s ridley turtles Lepidochelys kempii released around Long Island, New York, USA. Of these 31 turtles, 30 were tracked long enough to determine their migratory movements. The majority (83%) left Long Island before local waters dropped below 14°C and avoided being cold-stunned. Most individuals followed migratory routes previously reported for each of the 3 species, migrating to either coastal waters off the southeast USA or oceanic waters of the Gulf Stream. Rehabilitated turtles of each species also resumed typical diving patterns. Four of the remaining 5 turtles that did not migrate away from Long Island were likely cold-stunned again. Overall, most cold-stunned sea turtles tend to resume typical migratory and diving behavior post-rehabilitation.

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