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Organ responses to 14 C‐glucose injection in Atlantic halibut, Hippoglossus hippoglossus (L.), acclimated to diet of varying carbohydrate content
Author(s) -
GarciaRiera M P,
Hemre GI
Publication year - 1996
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.1996.tb01288.x
Subject(s) - hippoglossus hippoglossus , halibut , biology , glycogen , gill , medicine , carbohydrate , endocrinology , carbohydrate metabolism , starch , kidney , biochemistry , fishery , fish <actinopterygii>
After adapting Atlantic halibut, Hippoglossus hippoglossus (L.), to three different levels of available dietary carbohydrate (22, 47 and 82 g kg ‐1 ), the uptake of intraperitoneally injected glucose, both labelled and unlabelled, by the liver, white muscle, plasma, gills, heart, kidney and gastrointestinal wall, as well as concentrations of glucose in plasma and glycogen in organs, were studied. Even 16 h after glucose injection, halibut showed hyperglycaemia. The response, however, was moderate when adapted to the two higher than to the lowest starch diet, indicating some adaptative capacity. A negative correlation was found between plasma glucose and liver glycogen concentrations, hepatosomatic index and liver weight. The amount of glucose restored, relative to the amount injected, demonstrated that adaptation to dietary starch had significant effects on liver glycogen levels, with the highest incorporation of labelled glucose being observed in halibut adapted to the lowest dietary starch level. The amount of labelled glucose restored was highest in liver, followed by muscle > gastrointestinal wall > plasma > gills > kidney and heart, when evaluating the amount in the total organ. An indication of which organ was the most metabolically active in glucose utilization was found by expressing the results on a concentration basis, and it decreased in order, heart > gills > intestinal wall > kidney and muscle.