Subject: Re.: thermoregulation Date: May 04 18:52:46 1995 From: Jack Bowling - Jack_Bowling at mindlink.bc.ca
Sherman Suter writes:
>Don's reservations about Mike's statement #2 are well founded. Air (still >air) is by far a poorer conductor of heat than is water.
>"When heat is transferred by conduction alone, the difference in >temperature between the organism and its surroundings is inversely >proportional to the conductivity of the fluid.
>As a result, organisms in water maintain a temperature about twenty-three >times closer to that of their environment than do organisms in air." --
True. This is because the *rate of temperature change* between the organism and its surroundings is *directly* proportional to the conductivity of the fluid. Thus an equilibrium temperature is reached much more quickly in water than air. Which of course makes it all the more interesting how waterbirds manage to survive so well.