Ciekawostka: A blue whales heart only beats nine times per minute

Evidence: 45 • authority: 80

The Challenges of Plastinating a Blue Whale (Balaenoptera musculus) Heart

Evidence: 45 • authority: 80

Blue whale heart rate immortalised in motion sensor trace

Evidence: 45 • authority: 72

The sperm whale or cachalot (Physeter macrocephalus) is the largest of the toothed whales and the largest toothed predator. It is the only living member of the genus Physeter and one of three extant species in the sperm whale superfamily Physeteroidea, along with the pygmy sperm whale and dwarf sperm whale of the genus Kogia. The sperm whale is a pelagic mammal with a worldwide range, and will migrate seasonally for feeding and breeding. Females and young males live together in groups, while mature males (bulls) live solitary lives outside of the mating season. The females cooperate to protect and nurse their young. Females give birth every four to twenty years and care for the calves for m…

Evidence: 45 • authority: 72

The fin whale (Balaenoptera physalus), also known as the finback whale or common rorqual, is a species of baleen whale and the second-longest cetacean after the blue whale. The biggest individual reportedly measured 26–27.3 m (85–90 ft) in length, with a maximum recorded weight of 65.5 to 120 t (64.5 to 118.1 long tons; 72.2 to 132.3 short tons). The fin whale's body is long, slender, and brownish-gray in color, with a paler underside to appear less conspicuous from below (countershading). At least two recognized subspecies exist, one in the North Atlantic and one across the Southern Hemisphere. The species is found in all the major oceans, from polar to tropical waters, and is absent only…

Evidence: 45 • authority: 92

Sprint-like cardiac dynamics support repeated acrobatic lunges in foraging rorqual whales.. The dive response decreases heart rate, regulates blood flow distribution, conserves oxygen, and extends dive duration. In diving animals, dive heart rate can be modulated to meet increased demands of exercise during foraging. However, lunge-feeding rorquals represent an extreme example of exercise under breath-hold conditions: Though most of their dive time is spent gliding and filtering, lunges require high-power, acrobatic sprints to engulf massive volumes of prey-laden water. Our biologging data show that heart rate repeatedly increases with lunging but only gradually declines during filtering, d…

Evidence: 45 • authority: 72

Evidence: — • authority: 35