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Fig. 2. Acidification of the ambient water by different fish species. (A) Brackish
water species. (B) Freshwater species. Boleoph., Boleophthalmus
boddaerti; Perioph., Periophthalmodon schlosseri; Toadfish,
Opsanus beta; Misgurnus, Misgurnus anguillicaudatus;
Goldfish, Carassius auratus. Values are means ± s.e.m.,
N=6. All data points after 15 min are significantly different from
those at time 0.