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Warm Blooded

All articles tagged with #warm blooded

paleontology2 years ago

Revealing the Growth Journey of Baby Dinosaurs: From Football-Sized Hatchlings to 3-Tonne Teens

New research on the bones of Maiasaura, a minibus-sized dinosaur, reveals that these creatures were warm-blooded and highly active, capable of rapid growth and levels of activity comparable to modern mammals. By studying the bones of juvenile Maiasaura, researchers found that the size of the foramen, a hole through which blood enters the bone, was an indirect measurement of blood flow rate and energy usage. The study showed that young Maiasaura had significantly higher blood flow rates and required more energy and nutrients for bone growth compared to adults. These findings support the idea that dinosaurs were warm-blooded and active animals.

via The Conversation|
#blood-flow#bone-growth#dinosaurs
marine-biology2 years ago

Scientists Puzzled by Warm-Blooded Filter-Feeding Shark

Scientists have discovered that basking sharks, typically considered cold-blooded, exhibit elevated body temperatures while swimming, challenging our understanding of fish physiology. Previously, warm-bloodedness was thought to be limited to apex predators, but this study shows that it can also occur in large, passive-feeders like basking sharks. The sharks' ability to maintain higher blood pressure and blood flow, facilitated by compact muscle around their hearts, may allow them to migrate and feed more efficiently in colder waters. The reasons behind their warm-bloodedness and its advantages are still unclear, highlighting the need for further research on shark species for effective conservation strategies.

via ScienceAlert|
#basking-sharks#circulatory-system#fish-physiology
science2 years ago

Unraveling the Mystery: Megalodon's Demise Takes a Step Closer to Discovery

Scientists have discovered that the megalodon, an extinct shark species, was partially warm-blooded based on an analysis of fossilized teeth. The study suggests that this trait played a role in the shark's massive size and eventual extinction. Megalodons were regionally endothermic, able to regulate temperature in certain parts of their bodies, similar to modern great white and mako sharks. The researchers believe that the need to constantly regulate body temperature may have contributed to the megalodon's downfall as the Earth's temperature cooled. The study highlights the vulnerability of large apex predators, such as the modern great white shark, to climate change.

via CNN|
#extinction#fossil-analysis#megalodon
paleontology2 years ago

"Megalodon: The Warm-Blooded Giant Shark That Met Its Demise"

Analysis of the mineral makeup of megalodon's teeth confirms that the ancient shark was warm-blooded, a trait that likely contributed to its success and eventual extinction. Researchers estimate that megalodon had an average body temperature of about 81 degrees Fahrenheit (27 degrees Celsius), allowing it to be a dynamic predator and tolerate colder waters. While warm-bloodedness may have provided advantages, such as a broader range and efficient digestion, it also required a high food intake to sustain metabolism. The decline in ocean temperatures and sea levels, potentially leading to scarcity of its prey, may have contributed to megalodon's extinction. The study provides the first empirical evidence of megalodon's warm-bloodedness, shedding light on the enigmatic species that is primarily known through its teeth and a few vertebral specimens in the fossil record.

via Reuters.com|
#ancient-shark#extinction#megalodon