ISSN:
1573-5168
Keywords:
Boleophthalmus boddaerti
;
mudskipper
;
osmoregulation
;
Na+
;
K+-ATPase
;
HCO3 −
;
Cl−-ATPase
;
carbonic anhydrase
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The mudskipperB. boddaerti, was able to survive in waters of intermediate salinities (4–27‰). Fish submerged in dechlorinated tap water suffered 60% mortality by the fifth day while 60% of those in 100% sea-water (sw) died after the third day of exposure. After being submerged in 50% or 80% sw for 7 days, the plasma osmolality, plasma Na+ and Cl− concentrations and the branchial Na+ and K+ activated adenosine triphosphatase (Na+,K+-ATPase) activity were significantly higher than those of fish submerged in 10% sw for the same period. However, the activities of the branchial HCO3 − and Cl− stimulated adenosine triphosphatase (HCO3 −,Cl−-ATPase) and carbonic anhydrase of the latter fish were significantly greater than those of the former. Such correlation suggests that Na+,K+-ATPase is important for hyperosmotic adaptation in this fish while HCO3 −-Cl−-ATPase and carbonic anhydrase may be involved in hypoosmotic survival.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01987612
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