Dolphins can monitor their heart rate while diving

The authors of the work observed three male bottlenose dolphins (Tursiops truncatus), which were specially trained to detain

breathing for different times in accordance with the commands.

We trained dolphins to do long and shortholding your breath. When asked to hold their breath, their heart rate dropped before or immediately after the dive began. We also noticed that dolphins dropped their heart rate more and more rapidly in preparation for a long swim.

Andreas Falman, Doctor of the Valencia Oceanographic Park

The results indicate that dolphins, and possibly other marine mammals, can deliberately change their heart rate in accordance with the duration of the planned dive.

Dolphins have the ability to change our heart rate in the same way you and I can slow down our breathing, Fahlman suggests.

This, he adds, allows dolphins to be saved.oxygen during diving and can also be the key to preventing diving problems such as decompression sickness, which occurs mainly due to the rapid decrease in the pressure of the inhaled gas.

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