Glucose tolerance in turbot, Scophthalmus maximus (L.)

• Published in: Aquaculture nutrition Vol. 2; no. 2; pp. 117 - 120
• Main Authors: GARCIA-RIERA, M.P., HEMRE, G.-I.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.06.1996
• Subjects: Intraperitoneal glucose injection; Marine; muscle and liver glycogen; plasma glucose and triacylglycerols; Scophthalmus maximus; Scopthalmus maxilus; turbot
• ISSN: 1353-5773; 1365-2095
• DOI: 10.1111/j.1365-2095.1996.tb00018.x

Eighty turbot, Scophthalmus maximus (L.), (average weight 61 g) were injected intraperitoneally with exactly 1 g glucose per kg body weight. There was a peak in plasma glucose 3 h post injection. Thereafter a gradual decrease to basal levels was seen within 24 h. Plasma triacylglycerol concentrations showed a rapid decline during the first 24 h, and thereafter stable values. Blood haematocrit values decreased from 20% before injection to 16% 72 h after injection. Liver glycogen concentrations showed an initial decrease from 8 to 5 g 100 g−1 (w.w) during the first 12 h, and thereafter stable values, while muscle glycogen concentrations increased during the first 12 h, and thereafter showed a gradual decline until 72 h. This response was most probably caused by secondary changes upon handling in combination with the direct response to a glucose load. Thus turbot was able to restore alterations in carbohydrate metabolism efficiently within 24 h.