swim bladders

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Wed Oct 4 19:09:25 EST 1995

In article <BAKERG.42.000E395A at par18.aph.gov.au>,
   BAKERG at par18.aph.gov.au wrote:
>Can someone tell me exactly how fish swim bladders work?
>Do they alter the volume of the fish?
>Or do they change the weight?
>Any help appreciated. References would be useful.
>Greg Baker

Swim bladders alter the density of fish in relation to the partial pressures 
of the different gases, and the means by which the gas is concentrated within 
the swim bladder.

An excellent discussion can be found in Alexander, R. McN., Buoyancy. In: 
Evans, D.H. (ed), The Physiology of Fishes. CRC Press, 1993; 75-97.

John Underhay
Atlantic Veterinary College
Prince Edward Island

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