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Table 3.

Na+/K+-ATPase activity in middle and posterior segments of the killifish intestine

Time after transfer
SegmentSalinityPre-transfer12 h3 days7 days
Middle BW 1.49±0.08 1.59±0.21 2.49±0.34* 1.97±0.43 
 FW  2.13±0.14 1.78±0.19 2.44±0.26* 
Posterior BW 2.21±0.37 1.46±0.26 2.89±0.47 3.71±0.61* 
 FW  3.02±0.21 2.55±0.33 4.61±0.65* 
Time after transfer
SegmentSalinityPre-transfer12 h3 days7 days
Middle BW 1.49±0.08 1.59±0.21 2.49±0.34* 1.97±0.43 
 FW  2.13±0.14 1.78±0.19 2.44±0.26* 
Posterior BW 2.21±0.37 1.46±0.26 2.89±0.47 3.71±0.61* 
 FW  3.02±0.21 2.55±0.33 4.61±0.65* 

Na+/K+-ATPase activity (μmol mg-1protein h-1) is expressed as means s.e.m. (N≥8).

BW, brackish water control: FW, fresh water.

*

Significant difference from pre-transfer BW group (P<0.05). There were no significant differences between FW and time-matched BW groups.

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