Ion levels in the gastrointestinal tract content and plasma of four teleosts with different feeding habits

The levels of various ions (Na^sup +^, Cl^sup -^, Ca^sup 2+^, Mg^sup 2+^, K^sup +^) in the fluid phase of the gastrointestinal contents and of the plasma were determined in four teleosts with different feeding habits: traira (Hoplias malabaricus), hassar (Hoplosternum littorale), silver catfish (Rha...

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Published inFish physiology and biochemistry Vol. 32; no. 2; pp. 105 - 112
Main Authors Becker, A.G., Gonçalves, J.F., Garcia, L.O., Behr, E.R., Mallmann, F.J.K., Graça, D.L., Baldisserotto, B.
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.06.2006
Subjects
Ctenopharyngodon idella
Fish
Freshwater
Gastrointestinal tract
Hoplias malabaricus
Hoplosternum littorale
Rhamdia quelen
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Summary:The levels of various ions (Na^sup +^, Cl^sup -^, Ca^sup 2+^, Mg^sup 2+^, K^sup +^) in the fluid phase of the gastrointestinal contents and of the plasma were determined in four teleosts with different feeding habits: traira (Hoplias malabaricus), hassar (Hoplosternum littorale), silver catfish (Rhamdia quelen), and grass carp (Ctenopharyngodon idella). The results showed that most ionic levels in the fluid phase of the gastrointestinal tract seem to be affected by feeding habit and that these levels can be different from those found in the plasma. In practical terms, these results suggest that ionic levels of the gastrointestinal contents should be considered when preparing solutions for studies of intestinal absorption in fishes.[PUBLICATION ABSTRACT]
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ISSN:0920-1742
1573-5168
DOI:10.1007/s10695-006-9102-9