Fig. 2. Effects of exposure to terrestrial conditions on the rate of urea excretion of Protopterus dolloi. Values are means ± S.E.M. I, immersed (N=8); T, terrestrial (N=15); R/I, re-immersed (N=5). ^*Significantly different from the corresponding immersed condition (P<0.05); ^asignificantly different from the corresponding Day 1 condition (P<0.05); ^bsignificantly different from the corresponding Day 2 condition (P<0.05); ^csignificantly different from the corresponding Day 3 condition (P<0.05); ^dsignificantly different from the corresponding Day 4 condition (P<0.05); ^esignificantly different from the corresponding Day 5 condition (P<0.05); ^fsignificantly different from the corresponding Day 6 condition (P<0.05).

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