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Fig. 8. Effects of exposure to brackish water (10
, control), seawater
(30
) or air (emersion) for 17 days on the glutamine synthetase
activity in the adductor muscle (white bars), foot muscle (grey bars),
hepatopancreas (black bars) and mantle (hatched bars) of Polymesoda
expansa. Values are means ± S.E.M. (N=4).
aSignificantly different from the brackish water value
(P<0.05); bsignificantly different from the seawater
value (P<0.05).