Effects of Stonewort, Chara zeylanica on Growth,Skin Pigmentation and Total Carotenoids of Lambchop Rasbora Trigonostigma espei (Meinken, 1967)
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Abstract
The effect of stonewort algae (Chara zeylanica) at different levels on growth, skin pigmentation and total carotenoids of Lambchop Rasbora (Trigonostigma espei). Dried powdered of C. zeylanica was added to the basal diet at 0 (control), 5, 10, 15, 20 % and fed with carotenoid extract 4 mg/kg feed. Lambchop Rasbora fish initial average weight of 0.06±0.01 g were fed diets for 8 weeks. The results found that weight gain specific growth rate, feed conversion ratio and feed intake were significantly different among the treatment (p<0.05), but the length gain and survival rate were not significant different (p>0.05). The skin pigmentation response of male and female Lambchop Rasbora brightness (L), red hue (a) and yellow hue (b) were significant (p<0.05). The highest of redness and the lowest of brightness in both male and female fishes were found in the fish fed by diet containing 20 % were 3.50±1.87, 4.83±3.48 respectively. In addition, The highest of accumulative carotenoid content in fish was found in the fish fed by diet containing 20 % (11.01±1.62 µg/g). This study conclude that, the addition of stonewort, C. zeylanica in diet at 20 % can improve the quality of skin pigmentation, carotenoid accumulative of Lambchop Rosbosa, thus, stonewort in diet can increase potential in ornamental fish.
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