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First published online March 17, 2006
Journal of Experimental Biology 209, 1179-1184 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02100
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Tribute to R. G. Boutilier: Acid–base transfer across fish gills

D. J. Randall* and T. K. N. Tsui

Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong, S.A.R. China


Figure 1
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  		Fig. 1. Model of the movement of (A) carbon dioxide and (B) ammonia across fish gills. CA, carbonic anhydrase.

 

Figure 2
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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.

 

Figure 3
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  		Fig. 3. Location of various transporters on the gills of tilapia (A, left) coho salmon (A, right) and rainbow trout (B). CFTR, cystic fibrosis transmembrane regulator-like anion channel; NKA, Na+/K+ ATPase; AE, anion exchanger; V-ATPase, a proton pump: NHE, a Na+/H+-like exchange carrier; NKCC, an Na+/K+/2Cl– cotransporter; PVC, pavement cell; fwCC, freshwater chloride cell; CC, chloride cell; MR cell, mitochondria-rich cell; AC, accessory cell. (Modified from Wilson and Laurent, 2002Go.)

 

Figure 4
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  		Fig. 4. Immunolocalization of various transporters in freshwater tilapia gill. CC, chloride cell; PVC, pavement cell. Band-3 AE is an anion exchanger; V-H+-ATPase is a proton pump (Wilson et al., 2000Go). Arrowheads indicate freshwater chloride cells.

 




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