scholarly journals Salinity-stimulated changes in expression and activity of two carbonic anhydrase isoforms in the blue crab Callinectes sapidus

2007 ◽  
Vol 210 (13) ◽  
pp. 2320-2332 ◽  
Author(s):  
L. Serrano ◽  
K. M. Halanych ◽  
R. P. Henry
Keyword(s):  
Carbonic Anhydrase ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Expression And Activity

scholarly journals Acid-Base Balance in Callinectes Sapidus During Acclimation from High to Low Salinity

1982 ◽  
Vol 101 (1) ◽  
pp. 255-264 ◽  
Author(s):  
RAYMOND P. HENRY ◽  
JAMES N. CAMERON
Keyword(s):  
Carbonic Anhydrase ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Weak Acid ◽  
Strong Ion Difference ◽  
Acid Base Balance ◽  
Acid Base ◽  
Ion Regulation ◽  
Low Salinity ◽  
Base Balance

When transferred from 865 to 250 m-osmol salinity, the blue crab C. sapidus maintains its blood Na+ and Cl− concentrations significantly above those in the medium. When branchial carbonic anhydrase is inhibited by acetazolamide, ion regulation fails and the animals do not survive the transfer. An alkalosis occurs in the blood at low salinity, indicated by an increase in HCO3− and pH at constant PCO2. The alkalosis is closely correlated with an increase in the Na+-Cl− difference, a convenient indicator of the overall strong ion difference. The contribution of changes in PCO2 to acid-base changes was negligible, but the change in the total weak acid (proteins) may be important. It is suggested that the change in blood acidbase status with salinity is related to an increase in the strong ion difference, which changes during the transition from osmoconformity to osmoregulation in the blue crab, and which is related to both carbonic anhydrase and ionactivated ATPases. Note:

Membrane-associated carbonic anhydrase in gills of the blue crab, Callinectes sapidus

1987 ◽  
Vol 252 (5) ◽  
pp. R966-R971 ◽  
Author(s):  
R. P. Henry
Keyword(s):  
Carbonic Anhydrase ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Rapid Development ◽  
Respiratory Acidosis ◽  
Basal Membrane ◽  
Ion Regulation ◽  
Co2 Excretion

The presence of the enzyme carbonic anhydrase (CA) on the basal membrane of the branchial endothelial cells in the blue crab and its physiological significance were studied in vivo using a membrane-impermeant CA inhibitor, quaternary ammonium sulfanilamide (QAS). Injection of QAS into the hemolymph of Callinectes sapidus resulted in the rapid development of a respiratory acidosis; PCO2 rose almost 2 Torr, pH was lowered by approximately 0.25 units, and total CO2 rose by 2 mM. These results support the hypothesis that membrane-associated CA exposed to hemolymph is present in the crustacean gill and that it is physiologically significant in mobilizing hemolymph HCO-3 to CO2 to facilitate CO2 excretion across the gill. The recovery from this acidosis coincides with the clearance of the inhibitor from the hemolymph. Hemolymph osmotic and ionic parameters were unaffected by QAS, reconfirming the role of branchial cytoplasmic CA in ion regulation and also providing a convenient bioassay for determining CA inhibitor permeability in the intact organism.

scholarly journals mRNA Expression and activity of ion-transporting proteins in gills of the blue crab Callinectes sapidus: Effects of waterborne copper

2010 ◽  
Vol 30 (1) ◽  
pp. 206-211 ◽  
Author(s):  
Camila M. G. Martins ◽  
Daniela Volcan Almeida ◽  
Luis Fernando Fernandes Marins ◽  
Adalto Bianchini
Keyword(s):  
Mrna Expression ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Expression And Activity

Foraging behavior of an estuarine predator, the blue crab Callinectes sapidus in a patchy environment

Ecography ◽  
2000 ◽  
Vol 23 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Mary E. Clark ◽  
Thomas G. Wolcott ◽  
Donna L. Wolcott ◽  
Anson H. Hines
Keyword(s):  
Foraging Behavior ◽  
Blue Crab ◽  
Callinectes Sapidus ◽  
Patchy Environment
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