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Figure 6


Fig. 6. Rectal and non-rectal excretion of acid–base equivalents over 48 h (µequiv kg–1 h–1) by toadfish acclimated to 9, 35 and 50 ppt and fitted with rectal collection sacs. (A) Total rectal base excretion is the sum of base equivalents in both rectal fluid and precipitate. (B) Total non-rectal acid excretion is the sum of non-rectal titratable acid and ammonium fluxes. (C) Whole-animal net acid–base flux is given as acid excretion (the sum of the rectal base excretion and non-rectal acid excretion). Values are means ± s.e.m. (N>=6). An asterisk (*) indicates statistically significant difference from 35 ppt (P<0.05).





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