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In cold weather, alligators remain submerged with their tails in deeper, less-cold water and their nostrils projecting just above the surface. If ice forms on the water, they maintain ice-free breathing holes, and there have been occasions when their snouts have become frozen into ice.
Southern elephant seals (Mirounga leonina) can dive as deep as 2000 m and stay underwater for as long as 120 min, which means that they are subjected to hydrostatic pressures of more than 200 atmospheres, but hydrostatic pressure is not a major problem, as at depths below about 100 m, depending on the species, the lungs and other air spaces ...
American alligators do not normally reach such extreme sizes. In mature males, most specimens grow up to about 3.4 m (11 ft 2 in) in length, and weigh up to 360 kg (790 lb), [7] while in females, the mature size is normally around 2.6 m (8 ft 6 in), with a body weight up to 91 kg (201 lb).
The same fish in 60° F water will have a body temperature near 60° F. After a cool night, a grasshopper may be too stiff and cold to hop until the morning sun warms its body.
Alligators stop eating when temperatures dip below about 70 degrees, entering a dormant state below 55 degrees, as noted by the Florida Fish and Wildlife Conservation Commission.
Temperatures fell to 17 degrees in Ocean Isle Beach on the day the video was recorded, the park reported. The park’s alligators seemed to instinctively know when the water was about to freeze.
In humans, the diving reflex is not induced when limbs are introduced to cold water. Mild bradycardia is caused by subjects holding their breath without submerging the face in water. [10] [11] When breathing with the face submerged, the diving response increases proportionally to decreasing water temperature. [8]
“The alligator can tune their hearing to land or water by adjusting how tight the tympanic membrane is stretched. ... This is not to say American alligators hear as well underwater as they do on ...