Effects of the Levels of Astaxanthin in the Diet on the Flesh Pigmentation of Rainbow Trout

Authors : Muammer ERDEM, Sebahattin ERGÜN

Pages : 577-583

View : 16 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A feeding trial was conducted to study the effects of dietary astaxanthin concentration on muscle pigmentation of rainbow trout insert ignore into journalissuearticles values( Oncorhynchus mykiss); with a mean initial weight of 270 g fed diets supplemented with astaxanthin in diet concentrations of 60 insert ignore into journalissuearticles values(group II); and 90 mg/kg insert ignore into journalissuearticles values(group III); for 35 days. A control insert ignore into journalissuearticles values(I); group received a diet without astaxanthin. At the end of the experiment, the trout showed average body weight increases of 250.660g, 261.675 g and 234.410 g, and the flesh reached a level of 0.695 mg/kg, 10.539 mg/kg and 11.954 mg carotenoid/kg in groups I, II and III, respectively insert ignore into journalissuearticles values(initially, 0.595 mg/kg);. Fish pigmentation increased with increasing dietary carotenoid concentration. But the retention coefficients decreased as the pigment dose in the diet increased.
Keywords : Rainbow trout Oncorhynchus mykiss, pigmentation, astaxanthin