Mastodawn

Why we aren’t lizards: the evolution of endothermy through optimizing life history
Summary & Analysis by Kaleigh Remick of “The Evolution of Homeothermic Endothermy via Life History Optimization” by Rubalcaba
https://www.amnat.org/an/newpapers/Aug-2025-Rubalcaba.html

#Optimization #EEB #Endothermy

Why we aren’t lizards: the evolution of endothermy through optimizing life history

Read about “The Evolution of Homeothermic Endothermy via Life History Optimization” by Juan G. Rubalcaba (August 2025) Why do endotherms spend so much energy? A theoretical model shows that species followed one of two possible evolutionary patches: live fast while spending a lot (homeotherms), live slowly and keep your costs low (heterotherms)

Lukas VFN 🇪🇺Aug 9, 2024

Study reveals mechanism used by #TeguLizard to raise own temperature https://phys.org/news/2024-08-reveals-mechanism-tegu-lizard-temperature.html

Mitochondrial function in skeletal muscle contributes to reproductive #endothermy in tegu #lizards https://onlinelibrary.wiley.com/doi/10.1111/apha.14162

During the reproductive season, the muscles of both males and females produced far more #mitochondria... In addition, a mitochondrial protein ANT, known to be involved in a process that generates heat in #birds, was more abundant and more active during the reproductive season.

Study reveals mechanism used by tegu lizard to raise own temperature

A group of scientists has revealed the mechanism whereby Salvator merianae—the black and white tegu, also called the Argentine giant tegu—is able to keep warm by raising its own body temperature during the reproductive season even while it is in a dark burrow. This had never been observed before in reptiles.

Phys.org

Benjamin Carr, Ph.D. 👨🏻‍💻🧬Jun 17, 2024

#Dinosaurs needed to be cold enough that being #warmblooded mattered
Researchers now think dinosaurs that already had some cold tolerance evolved #endothermy, or warm-bloodedness, to adapt when they migrated to regions with cooler temperatures, many dinosaurs from these groups are thought to have been feathered. Feathers can be used to both trap and release heat, allowing dinosaurs to regulate their body temperature in more diverse climates. Birds use feathers same way.
https://arstechnica.com/science/2024/05/when-warm-blooded-dinosaurs-first-roamed-the-earth/

Dinosaurs needed to be cold enough that being warm-blooded mattered

Two groups of dinosaurs moved to cooler climes during a period of climate change.

Ars Technica

Matt Willemsen May 31, 2024

Dinosaurs needed to be cold enough that being warm-blooded mattered
https://arstechnica.com/science/2024/05/when-warm-blooded-dinosaurs-first-roamed-the-earth/ #paleaontology #dionosaurs #WarmBloodedness #migration #endothermy

Dinosaurs needed to be cold enough that being warm-blooded mattered

Two groups of dinosaurs moved to cooler climes during a period of climate change.

Ars Technica

Bill Loguidice May 28, 2024

Warm-blooded dinosaurs first roamed the Earth about 180 million years ago in new study #dinosaurs #study #research #sauropod #endothermy #ornithischians #thermophysiologies

https://fullsteamahead365.com/2024/05/28/warm-blooded-dinosaurs-first-roamed-the-earth-about-180-million-years-ago-in-new-study/

Warm-blooded dinosaurs first roamed the Earth about 180 million years ago in new study - fullSTEAMahead365

Analyzing over 1,000 fossils, climate models, and dinosaur family trees, scientists have determined that warm-blooded dinosaurs appeared about halfway through their time on the planet, about 180 million years ago, in a new study published in the journal, Current Biology.

fullSTEAMahead365

fx dechaume-moncharmont Jun 25, 2021

Nesting #dinosaur in the #Arctic : despite constant darkness in winter and cool condition in summer, they were non-migratory species, which raises the question of their possible #endothermy (again). #science #biology #paleontology
📄 Druckenmiller et al (2021) Nesting at extreme polar latitudes by non-avian dinosaurs. Current Biology http://dx.doi.org/10.1016/j.cub.2021.05.041