Articles tagged with Endothermy
A group of scientists discovered that the Black and white tegu lizard can raise its own body temperature during the reproductive season, even in a dark burrow. The study found that this phenomenon is due to the increased production of mitochondria and a protein called ANT, which generates heat.
Research from Stockholm University reveals that marsupials possess a not fully evolved form of brown fat, a crucial finding for understanding the origin and regulation of this heat-producing organ. The study suggests that the gene networks required to enable thermogenesis existed before the divergence of marsupials and placental mammals.
A new study suggests that some dinosaurs, such as theropods and ornithischians, may have developed endothermy around 180 million years ago. This adaptation allowed them to be highly active and sustain activity over longer periods, leading to faster growth and increased offspring production.
A University of Illinois team found tropical birds can handle thermal variation, disproving the climate variability hypothesis. The study, which measured metabolic rates across a range of temperatures, suggests that birds in the Neotropics may be more resilient to warming than previously thought.
A new study has found that a relatively ancient shark species, the smalltooth sand tiger, exhibits anatomic features suggesting regional endothermy. This discovery suggests there may be more warm-blooded sharks than previously believed, and potentially poses significant conservation implications for these species.
A new study published in the Proceedings of the National Academy of Sciences confirms that the Megalodon shark was warm-blooded, with a body temperature estimated at around 27°C. This discovery provides empirical evidence for the extinct species' internal heat production, shedding light on its biology and ecological role.
Teleost fishes have developed distinct ways to generate heat, with mackerel tuna utilizing muscle differentiation and sailfish relying on ATP decomposition. These findings suggest that organisms adapt to achieve endothermy through different pathways, maximizing existing biological foundations.
Researchers found that endotherms have well-developed turbinates and larger nasal cavities than ectotherms, helping to cool their brains. This discovery sheds light on the evolution of nasal cooling in warm-blooded animals from their theropod dinosaur ancestors.
A research team from Germany, Austria, Canada, and the USA analyzed Troodon eggshells using a new method, revealing that they were produced at temperatures of 42°C and 30°C. The findings suggest that Troodon females laid eggs in communal nests, similar to modern ostriches.
Dinosaurs had high metabolic rates, suggesting they were endotherms, which allowed them to regulate their body temperature. This finding refutes previous ideas that dinosaurs were intermediate between ectotherms and endotherms.
A team of international scientists found that endothermy appeared in mammalian ancestors about 233 million years ago, well before the origin of mammals. Fossils from South Africa's Karoo region played a key role in this discovery, providing an unbroken record of life's evolution.
Research finds that bat box design and landscape placement significantly impact the energetic balance of endangered Indiana bats. A study by University of Illinois researchers tested five bat box designs and four landscape placements to determine their effects on bat metabolism, development, and survival.
A comprehensive analysis of brain cellular composition across amniotes shows that mammals and birds have dramatically increased neuron numbers in the telencephalon and cerebellum, associated with higher cognition. The study suggests that only a handful of unique evolutionary events augmented brain processing power in these groups.
A team of researchers proposes that endothermy in mammals and birds has a common ancestry and is much older than previously accepted. They found evidence of endothermy in early ancestors of modern birds and mammals, including Pelycosaurs and Pareiasaurs.
Scientists propose an alternative model for the formation of nitrogen, oxygen, and water based on the Earth's atmosphere history. They suggest that the Earth's lower mantle can create heavier elements through nuclear transmutation under high temperatures and pressures.
Researchers found that males and females have different heat-sensing systems, which may be related to reproduction and offspring care. This difference leads to segregation between the sexes at certain periods during breeding cycles.
The Permian-Triassic mass extinction marked the origin of endothermy in both synapsids and archosaurs, with evidence suggesting a 'switch' around 250 million years ago. This coincided with the emergence of erect posture and hair in mammal ancestors, as well as feathers in bird ancestors.
Recent research suggests that pathogens may have driven the evolution of warm-blooded animals by providing a selective advantage. By maintaining stable body temperatures, mammals and birds can prime their immune systems to withstand virulent pathogens, making endothermy a more favorable strategy than ectothermy.
Researchers discovered that some dinosaurs, like oviraptorid theropods, had intermediate body temperatures between endotherms and ectotherms. They found evidence of higher temperatures in fossil eggshells, suggesting these animals may have been more active than previously thought.
Researchers from UCLA report that some dinosaurs had the ability to warm themselves by drawing heat from the sun, contradicting previous theories. The study found that these dinosaurs had higher body temperatures than modern alligators and crocodiles, suggesting they were more active.
Endothermic fish, including sharks and tunas, can swim two and a half times faster and twice as far as cold-blooded species. This unique physiological characteristic allows them to maximize their swimming distance and speed, providing benefits for hunting and reproduction.
A study suggests that many dinosaurs were probably endothermic, athletic animals due to their high energy requirements during walking and running. This trait may have enabled them to thrive in various habitats, including colder regions, allowing them to cover the entire Mesozoic landscape.
Research suggests that many dinosaur species were probably endothermic, with the potential for athletic abilities rivalling those of present-day birds and mammals. This would have allowed them to inhabit colder habitats, but also required a constant supply of fuel due to rapid metabolisms.