Metabolism of leatherback turtles, gigantothermy, and thermoregulation of dinosaurs

  title={Metabolism of leatherback turtles, gigantothermy, and thermoregulation of dinosaurs},
  author={Frank V. Paladino and Michael P. O’connor and James R Spotila},
LEATHERBACKS (Dermochelys coriacea) are among the largest living reptiles (>900 kg)1, 2 and range from the tropics to north of the Arctic Circle3, 4. They maintain elevated body temperatures (25.5 °C) in cold seawater (7.5 °C)5, 6 and heat up on land7. Metabolic and thermoregulatory mechanisms of leatherbacks have important implications for considerations of size and function in animal biology8–10 and for speculation on the endothermic capacities of dinosaurs11–18. Here we report that metabolic… 

Behaviour and Physiology: The Thermal Strategy of Leatherback Turtles

In juvenile leatherbacks, heat gain is controlled behaviourally by increasing activity while heat flux is regulated physiologically, presumably by regulation of blood flow distribution, harnessing physiology and behaviour allows leatherbacks to keep warm while foraging in cold sub-polar waters and to prevent overheating in a tropical environment.

Growth and metabolism of leatherback sea turtles (Dermochelys coriacea) in their first year of life

Oxygen consumption (VO2 ) was monitored in six juvenile leatherback turtles (Dermochelys coriacea) imported from the Virgin Islands (UK) and kept in a covered outdoor facility at the University of

Exercise warms adult leatherback turtles ☆ Brian

Leatherback sea turtles (Dermochelys coriacea) can maintain body temperature (TB) up to 18 °C above that of the surrounding sea water (TW) which allows leatherbacks to enter cold temperate waters and

Exercise warms adult leatherback turtles.

  • B. BostromD. R. Jones
  • Environmental Science
    Comparative biochemistry and physiology. Part A, Molecular & integrative physiology
  • 2007

Resource Requirements of the Pacific Leatherback Turtle Population

Understanding the leatherback's needs for gelatinous zooplankton, versus the availability of these resources, can help to better assess population trends and the influence of climate induced resource limitations to reproductive output.

Behavioral and metabolic contributions to thermoregulation in freely swimming leatherback turtles at high latitudes

It is estimated that metabolic rates necessary to support the observed Tg are ~3 times higher than resting metabolic rate, and that specific dynamic action is an important source of heat for foraging leatherbacks.

Oxygen stores and aerobic metabolism in the leatherback sea turtle

Lung volume and blood volume in leatherbacks were measured to estimate partitioning of oxygen stores and their potential contribution to aerobic metabolism during diving, suggesting that the turtles were repaying an oxygen debt incurred in the netting procedure.

Thermal independence of muscle tissue metabolism in the leatherback turtle, Dermochelys coriacea.

  • D. PenickJ. Spotila F. Paladino
  • Biology, Environmental Science
    Comparative biochemistry and physiology. Part A, Molecular & integrative physiology
  • 1998

Dinosaur body temperatures: the occurrence of endothermy and ectothermy

  • F. Seebacher
  • Environmental Science, Geography
  • 2003
The commonly asked question whether dinosaurs were ectotherms or endotherms is inappropriate, and it is more constructive to ask which dinosaurs were likely to have been endothermic and which ones ectothermic, which suggests endothermy most likely evolved among the Coelurosauria and, to a lesser extent, among the Hypsilophodontidae.



Body temperatures of Dermochelys coriacea and other sea turtles.

The effect of predation on the community structure of fresh-water zooplankton and Morphological variation and its causes by Ambystoma tigrinum in the high Cascade Mountains of southern Oregon are studied.

Chondro-osseous morphology of Dermochelys coriacea, a marine reptile with mammalian skeletal features

The chondro-osseous morphology of Dermochelys is unlike that of any other known extant turtle or reptile but is more similar to that of marine mammals, notably Cetacea (whales) and Sirenia (manatees).

Physiological, migratorial, climatological, geophysical, survival, and evolutionary implications of Cretaceous polar dinosaurs

  • G. Paul
  • Environmental Science, Geography
  • 1988
The presence of Late Cretaceous social dinosaurs in polar regions confronted them with winter conditions of extended dark, coolness, breezes, and precipitation that could best be coped with via an

Ventilation, gas exchange and metabolic scaling of a sea turtle.

Occurrence of the Leathery Turtle in the Northern North Sea and off Western Norway

DURING the late summer of 1956, three specimens of the leathery turtle or luth, Dermochelys coriacea (L.), were captured by Norwegian fishing vessels. The first of these was observed on July 28,

Selection pressure for high body temperatures: implications for dinosaurs

An understanding of the thermal strategies of extant animals is a prerequisite for any useful discussion on the possible thermal strategies of dinosaurs. Of cardinal importance is the identification

A Mathematical Model for Body Temperatures of Large Reptiles: Implications for Dinosaur Ecology

These calculations show that a large reptile would have a relatively constant high body temperature when exposed to warm, diurnally fluctuating environmental conditions, even with a low metabolic rate, as long as the average values of the physical parameters result in a body temperature within tolerable limits.

The effect of large body size on the temperature regulation of the Komodo dragon, Varanus komodoensis.

  • B. McNabW. Auffenberg
  • Environmental Science
    Comparative biochemistry and physiology. A, Comparative physiology
  • 1976

Evidence for Low Temperatures and Biologic Diversity in Cretaceous High Latitudes of Australia

That dinosaurs coped with high latitude for at least 65 million years in Australia and Campanian to Maastrictian time in Alaska suggests that cold and darkness may not have been prime factors bringing about the extinction of dinosaurs and some other groups at the Cretaceous-Tertiary boundary, unless they were prolonged.