Fractional reabsorption of calcium, magnesium and phosphate in the kidneys of freshwater North American eels (Anguilla rostrata LeSueur) following removal of the corpuscles of Stannius

1995 ◽  
Vol 165 (5) ◽  
pp. 348-358 ◽  
Author(s):  
D. G. Butler ◽  
M. Z. Alia Cadinouche
Keyword(s):  
North American ◽  
Anguilla Rostrata ◽  
Corpuscles Of Stannius ◽  
Calcium Magnesium ◽  
American Eels

Occurrence of American Eels, Anguilla rostrata, in Waters Overlying the Eastern North American Continental Shelf

1973 ◽  
Vol 30 (11) ◽  
pp. 1752-1755 ◽  
Author(s):  
Charles A. Wenner
Keyword(s):  
Continental Shelf ◽  
Chesapeake Bay ◽  
North American ◽  
Cape Cod ◽  
Anguilla Rostrata ◽  
American Eel ◽  
Morphometrical Analysis ◽  
Assateague Island ◽  
American Eels

Eleven reproductively maturing specimens of the American eel, Anguilla rostrata, were collected during three independent off-shore trawling operations. Three females were taken on December 5, 1967 southeast of the mouth of Chesapeake Bay in 10–13 fathoms, one male and one female on November 5, 1969 southeast of Cape Cod in 35–45 fathoms, and six females east of Assateague Island on December 22, 1971 in 5 fathoms. Morphometrical analysis showed that the specimens were within the range of "silver" phase of Anguilla rostrata. Gonadal observations were made on all specimens.

The renal handling of calcium and renal Ca2+(Mg2+)-activated adenosinetriphosphatase activity in freshwater- and seawater-acclimated North American eels (Anguilla rostrata LeSueur)

1981 ◽  
Vol 59 (3) ◽  
pp. 478-485 ◽  
Author(s):  
James C. Fenwick
Keyword(s):  
Fresh Water ◽  
North American ◽  
Clearance Rate ◽  
Anguilla Rostrata ◽  
Renal Tubules ◽  
Renal Handling ◽  
Apparent Affinity ◽  
Calcium And Magnesium ◽  
American Eels

In fresh water a small fraction of the calcium filtered across the glomerular apparatus is recovered whereas in seawater the clearance rate of calcium greatly exceeds that of inulin. This indicates a lower translocation of calcium by the renal tubules in fresh water when compared with that in seawater. This increased translocation of calcium in the seawater-acclimated eels was associated with an increase in the activity of renal Ca2+(Mg2+)-ATPase and a decrease in the apparent affinity of the enzyme for calcium. The enzyme was equally stimulated by calcium and magnesium and this may be associated with the fact that in seawater the eel faces a similar problem with regard to each of these ions.

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