In vivo aerobic metabolism of the rainbow trout gut and the effects of an acute temperature increase and stress event

The fish gut is responsible for numerous potentially energetically costly processes, yet, little is known about its metabolism. Here, we provide the first measurements for aerobic metabolism of the gut in a teleost fish by measuring gut blood flow, as well as arterial and portal venous oxygen conten...

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Published inJournal of experimental biology Vol. 221; no. 14; p. jeb180703
Main Authors Brijs, Jeroen, Gräns, Albin, Hjelmstedt, Per, Sandblom, Erik, van Nuland, Nicole, Berg, Charlotte, Axelsson, Michael
Format Journal Article
LanguageEnglish
Published England The Company of Biologists Ltd 2018
Subjects
1989
Aerobic capacity
aquaculture
bass dicentrarchus-labrax
Biological Sciences
Biologiska vetenskaper
Blood flow
cannulation
cardiac-output
Energy expenditure
extraction
Fish
Fish and Aquacultural Science
Fisk- och akvakulturforskning
Gastrointestinal
gastrointestinal blood-flow
hypoxia
In vivo methods and tests
lean e
Life Sciences & Biomedicine - Other Topics
Metabolism
Oncorhynchus mykiss
Oxygen
Oxygen consumption
Oxygen content
Oxygen uptake
p195
portal-vein
sea
Sensitivity
Stresses
Teleost
Trout
v78
Teleost
Energy expenditure
Oxygen consumption
Gastrointestinal
Metabolism
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Summary:The fish gut is responsible for numerous potentially energetically costly processes, yet, little is known about its metabolism. Here, we provide the first measurements for aerobic metabolism of the gut in a teleost fish by measuring gut blood flow, as well as arterial and portal venous oxygen content. At 10°C, gut oxygen uptake rates were 4.3±0.5 ml O h kg (∼11% of whole animal oxygen uptake). Following acute warming to 15°C, gut blood flow increased ∼3.4-fold and gut oxygen uptake rate increased ∼3.7-fold (16.0±3.3 ml O h kg ), now representing ∼25% of whole animal oxygen uptake. Although gut blood flow decreased following an acute stress event at 15°C, gut oxygen uptake remained unchanged due to a ∼2-fold increase in oxygen extraction. The high metabolic thermal sensitivity of the gut discovered here could have important implications on the overall aerobic capacity and performance of fish and warrants further investigations.
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ISSN:0022-0949
1477-9145
1477-9145
DOI:10.1242/jeb.180703