Document Detail


Osmoregulatory physiology of pyloric ceca: regulated and adaptive changes in chinook salmon.
MedLine Citation:
PMID:  15945075     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Functions of the anatomically obvious, yet peculiar, pyloric ceca of the fish gut have been a source of conjecture for over two millennia since Aristotle hypothesized on digestive utilities. Here, we demonstrate regulated and adaptive changes in osmoregulatory physiology of ceca from chinook salmon (Onchorhynchus tshawytscha). Transfer of salmon from freshwater to seawater (both short- and long-term) significantly stimulated both fluid uptake from 5.1 to 8.3-9.3 microl/cm2/hr and also Na+/K+ -ATPase from 6.5 to 8.3-9.6 micromol/ADP/mg protein/hr. Similar changes were induced with implants of cortisol, which resulted in high physiological cortisol levels in plasma. Ceca, which can number about 200 in chinook salmon, were estimated to account for the majority of fluid uptake capacity of the intestine and, after long-term seawater adaptation, the proportion of uptake capacity was sixfold higher. Transport physiology of ceca is thus under environmental and endocrine control indicative of an important role in salt and water homeostasis.
Authors:
Philip A Veillette; Ronald J White; Jennifer L Specker; Graham Young
Related Documents :
12097715 - Flies, fish and food.
11440475 - Effects of subchronic exposure to aluminium in acidic water on bioenergetics of atlanti...
18380095 - Histopathological changes in testis of the freshwater fish, heteropneustes fossilis (bl...
17067025 - Ecotoxicological assessment of sediment, suspended matter and water samples in the uppe...
17302945 - Objective and subjective hardness of a test item used for evaluating food mixing ability.
25376155 - Sex-specific effects of prenatal and postnatal nutritional conditions on the oxidative ...
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of experimental zoology. Part A, Comparative experimental biology     Volume:  303     ISSN:  1548-8969     ISO Abbreviation:  J. Exp. Zoolog. Part A Comp. Exp. Biol.     Publication Date:  2005 Jul 
Date Detail:
Created Date:  2005-06-27     Completed Date:  2005-08-08     Revised Date:  2009-10-05    
Medline Journal Info:
Nlm Unique ID:  101168223     Medline TA:  J Exp Zool A Comp Exp Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  608-13     Citation Subset:  IM    
Affiliation:
Department of Zoology, University of Otago, Dunedin, New Zealand. pveillette@gso.uri.edu
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Acclimatization / physiology*
Analysis of Variance
Animal Structures / anatomy & histology,  drug effects,  physiology*
Animals
Body Fluids / metabolism
Fresh Water
Hydrocortisone / blood,  pharmacology
Ouabain
Pylorus / anatomy & histology*
Salmon / physiology*
Seawater
Sodium-Potassium-Exchanging ATPase / metabolism*
Water-Electrolyte Balance / physiology*
Chemical
Reg. No./Substance:
50-23-7/Hydrocortisone; 630-60-4/Ouabain; EC 3.6.3.9/Sodium-Potassium-Exchanging ATPase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Changes of mRNA expression of vascular endothelial growth factor, angiopoietins and their receptors ...
Next Document:  Seasonal changes in serum leptin of the feral raccoon (Procyon lotor) determined by canine-leptin-sp...