Blue whales have a minimum heart rate of only 2 per minute
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In general, animals are inversely proportional to body size and heart rate, with human heart rates ranging from 60 to 100 on average, compared to that of the smallest mammal, the rat. Heart rate is more than 1000 times per minute. On the other hand, whales have extremely low heart rate, and the heart rate of blue whales has been accurately measured, and it has been found that the minimum is “twice a minute”.
Extreme bradycardia and tachycardia in the world's largest animal | PNAS
https://doi.org/10.1073/pnas.1914273116
A Blue Whale Had His Heartbeat Taken for the First Time Ever — And Scientists Are Shocked | Live Science
First-Ever Measurement of a Blue Whale's Heartbeat Reveals Surprising Extremes
https://www.sciencealert.com/scientists-listen-to-the-slow-rhythmic-heartbeat-of-a-blue-whale-for-the-first-time
Stanford marine biologists Jeremy Goldbogen and others were interested in blue whales from a biological and physiological standpoint and tried to measure their heart rate.
Goldbogen's team used a device that can be attached to the body of a whale non-invasively with a suction cup, attached to a female blue whale about 22 meters long encountered in Monterey Bay, 9 hours of data Obtained successfully. There is a record of heart rate measurements such as white dolphins in the past, but this is the first time that we have actually measured the heart rate of blue whales.
According to this data, the heart rate during diving averaged 4 to 8 times per minute, and decreased to 2 when it was the lowest. When ascending to breathe, the heart rate increased from 25 to 37 per minute.
According to Goldbogen, the data obtained this time will help understand how animals function at an extreme value of 200 tons.
by Tyler Nix
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in Creature, Posted by logc_nt