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Page Title | About the Gulf Ecology Division | US EPA11-23-2009

A pump was used to maintain a constant current velocity of 8 ... During January and February 1980, the seawater circulation pump was turned off twice daily for one hour, from 1200 ...

http://www.epa.gov/ged/publica/cabanc38.htm (HTML)

Page Title | About the Gulf Ecology Division | US EPA11-23-2009

... the lumina of the ventricle or bulbus and were then pumped to the arterioles of the gills via the ventral aorta.

http://www.epa.gov/ged/publica/cabanc8.htm (HTML)