Both amphibians and reptiles are ectotherms, meaning that they derive heat from the environment, rather than producing it internally. ❋ Unknown (2008)
As “ectotherms” they depend on the external environment to control their body temperature. ❋ Unknown (2010)
The high diversity of Late Maastrichtian dinosaurs in high latitudes, where ectotherms are absent, strongly questions hypotheses according to which dinosaur extinction was a result of temperature decline, caused or not by the Chicxulub impact. ❋ ReBecca Foster (2009)
Generally, sea surface temperatures in the Arctic are low, but true ectotherms (previously called "cold-blooded organisms", i.e., their body temperatures vary with the temperature of their surroundings) can grow at the freezing point of seawater. ❋ Unknown (2009)
Fish are ectotherms, thus, for the most part, their body temperature is governed by that of the surrounding waters. ❋ Unknown (2009)
Endotherms differ from an ectotherm because they typically have core temperatures above that of the surrounding environment, whereas the core temperatures of ectotherms depend on external sources of heat – primarily from solar radiation. ❋ Unknown (2008)
Many ectotherms are able to regulate their body temperature behaviorally, by moving into and out of sunlight. ❋ Unknown (2008)
Some mammals and birds that at times have high and well-regulated body temperatures, but at other times they are more like ectotherms and are referred to as heterotherms (Greek hetero = different). ❋ Unknown (2008)
Endotherms are sometimes referred to as "warm-blooded," but this term is inaccurate and misleading, as is the term "cold-blooded" for ectotherms. ❋ Unknown (2008)
Endotherms such as mammals maintain a preferred body temperature with heat generated by their own metabolic processes, while ectotherms such as lizards obtain their body heat from the environment. ❋ Unknown (2008)
For example, the body temperature of a small tropical fish in warm water or desert lizard on hot sand (both of which are considered ectotherms) may have body temperatures higher than birds or mammals in the same environment-largely because of the insulation provided by feathers and fur and associated behavioral and physiological heat-dissipating mechanisms that prevent their body temperatures from increasing above critical temperatures. ❋ Unknown (2008)
I was referring to the prevailing prediction that at least within my lifetime said that dinosaurs were generally slow moving ectotherms. chunkdz ❋ Unknown (2007)
I was referring to the prevailing prediction that at least within my lifetime said that dinosaurs were generally slow moving ectotherms. ❋ Unknown (2007)
Snakes, like turtles and lizards, are ectotherms; they regulate their temperature from the outside rather than inside, and usually take on the temperature of their immediate surroundings. ❋ Janine M. Benyus (1989)
McGinnity, the Nashville Zoo's curator of ectotherms, initiated the project so the frozen salamander sperm can produce hellbenders genetically adapted to their local environments and fit for restocking. ❋ Unknown (2010)
Unlike other reptiles that are ectotherms (a term more accurate than cold-blooded), birds are endotherms, meaning they use their own metabolism to maintain a constant body temperature. ❋ Unknown (2010)
"Because the tropics are the centre of Earth's biodiversity and its chief engine of primary productivity, the relatively large effects of temperature change on the metabolism of tropical ectotherms may have profound local and global consequences," the scientists conclude in their report published in the journal Nature on Thursday. ❋ Unknown (2010)
