Dietary carotenoid pigment supplementation influences hepatic lipid and mucopolysaccharide levels in rainbow trout (Oncorhynchus mykiss) |
| |
Authors: | Page G I Russell P M Davies S J |
| |
Affiliation: | aFish Nutrition Unit, Department of Biological Sciences, University of Plymouth, Plymouth, Devon, PL4 8AA U.K.;bMaple Leaf Foods Agresearch, 150 Research Lane, Suite 200, Guelph, Ontario, Canada N1G 4T2 |
| |
Abstract: | We assessed the effects of dietary carotenoid pigment supplementation on liver histochemistry in the rainbow trout. One hundred and eight rainbow trout (mean mass 266 ± 10 g) were assigned to each of three replicate tanks for each of three dietary treatments; astaxanthin, canthaxanthin, or control at a target dietary inclusion of 100 mg/kg, by top-coating a pigment-free commercially extruded basal diet (Trouw Aquaculture, U.K.). Fish were fed for 3 weeks at a ration of 1.2% body mass/day, in a recirculating freshwater system maintained at 16 °C. Frozen liver sections were stained for total lipids, unsaturated lipids, glycogen, mucopolysaccharides, glycogen phosphorylase and aspartate aminotransferase. Relative amounts were measured quantitatively by image analysis. Carotenoid treatment significantly (P < 0.05) altered the total lipid profile and hepatic mucopolysaccharide contents of livers of rainbow trout. Results are discussed in relation to the catabolic potential of the liver in carotenoid pigment metabolism. |
| |
Keywords: | Astaxanthin Canthaxanthin Glycogen phosphorylase Liver Mucopolysaccharides Rainbow trout |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|