In a hard breakthrough, researchers at UC San Diego and Stanford have, for the first time, recorded the heart rate of a blue whale as it swam in the wild off California. Four suckers had secured the sensor-filled label near the left fin of the whale, where it recorded the animal's heart rate through electrodes embedded in the center of two of the suction legs.
Analysis of the data suggests that a blue whale's heart is working at its limit, which may explain why blue whales have never evolved to be bigger, according to the study. The data also suggests that some unusual features of the whale's heart could help it function at these extremes. Studies like this add to our fundamental knowledge of biology and can also inform conservation efforts.
After measuring the heart rates of diving emperor penguins and captive whales, researchers from the University of Stanford made a decision to try to measure the heart rates of wild whales.
The researchers managed to attach their device next to the flipper of a 15-year-old male blue whale in Monterey Bay, California. The suction cup tags were out onto the whale without knowing if they would stay on due to the accordion-like skin of the whale that stretches when it opens its mouth to feed.More news: Lambo V12 Vision Gran Turismo revealed as 'the best virtual auto ever'
Simultaneously, the new investigation, co-wrote by sea life researcher Jeremy Goldbogen from the School of Humanities Sciences at Stanford University, recommends the blue whale has arrived at the biggest size feasible for a sea-going living being on Earth. The data it captured showed striking extremes.
Using suckers to avoid damaging the huge animal, researchers at Stanford University and other organizations placed the device, about the size of a lunchbox, in a 70-foot-long male blue whale in Monterey Bay previous year. Taking a gander at the ECG results, the blue whales pulse bounced considerably during these scavenging thrusts, beating around over multiple times more contrasted with its slowest rate or bradycardia. "The highest heart rate - 25 to 37 beats per minute - occurred at the surface, where the whale was breathing and restoring its oxygen levels".
A blue whale can beat its heart just twice a minute when diving - a rate that is half as slow as had previously been thought possible - an experiment has found.
Coronary heart charges throughout dives reached a minimal of two beats per minute - properly beneath the anticipated resting coronary heart fee of 15 beats per minute - surging to 2.5 occasions the minimal coronary heart fee throughout lunge feeding.More news: National Basketball Association players react to Zach LaVine's historic game against the Charlotte Hornets
The team says the data is interesting because it shows the highest heart rate nearly outpaced predictions while the lowest was 30 to 50% lower than predicted. It may help explain why blue whales are Earth's largest known creatures. Meanwhile, the impressively high rates may depend on subtleties in the heart's movement and shape that prevent the pressure waves of each beat from disrupting blood flow. "Particularly, new measures of vital rates and physiological rates help us understand how animals work at the upper extreme of body mass".
Researchers have recorded humpback whales changing their calls when they move to new pastures in order to match the songs of others around them.
"A lot of what we do involves new technology and a lot of it relies on new ideas, new methods and new approaches", said David Cade, a recent graduate of the Goldbogen Lab. "We're always looking to push the boundaries of how we can learn about these animals". His heart weighs 400 pounds, about the size of a refrigerator, "said Dave Cade, a postdoctoral researcher at Stanford and UC Santa Cruz, co-author of the study".
This research was funded by the Office of Naval Research, a Terman Scholarship from Stanford University and the John B. McKee Fund of the Scripps Institution of Oceanography.More news: Prince William Is Reportedly "Not a Huge Fan" of Prince Andrew