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Temperature-sensing probes implanted in wild American alligators have found their core body temperatures can fall to around 5 °C (41 °F), but as long as they remain able to breathe, they show no ill effects when the weather warms. [109]
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.
For this reason an important rule in cold water diving is never to intentionally free flow the regulator. [35] Once the water temperature drops below 3.3 °C (37.9 °F) there is not enough heat in the water to rewarm the components of the second stage being chilled by the cold gas from the first stage, and most second stages start forming ice. [35]
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 ...
However, given that alligators are cold-blooded reptiles, they undergo a different form of self-preservation. Much like snakes in South Carolina, alligators in the Palmetto State go into a state ...
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.
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]
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.