Supadha Kiriratnikom, Rattiya Zaau and Atcharat Suwanpugdee

pp. 133 - 139

Abstract

The study was conducted to determine the optimum level of dried Spirulina in test diets for goldfish.
The goldfish fed the test diet supplemented with dried Spirulina at a concentration of 1, 3 and 5% compared
to the control diet without Spirulina. The color value (L, a and b) was measured by a colorsmeter after
6 weeks of feeding trial. The L value in the goldfish fed control diet was highest when compared to those fed
all Spirulina supplemented diets. The a values in the goldfish fed control, 1, 3 and 5% Spirulina were 11.70,
18.87, 20.30 and 23.68, and the b values in the goldfish fed control, 1, 3 and 5% Spirulina were 18.36, 28.86,
31.74 and 35.53 respectively. Growth performance was highest in the goldfish fed test diet containing 3%
dried Spirulina (p<0.05). The results showed the positive effect of 3-5% dried Spirulina for pigmentation in
goldfish; however, the test diet supplemented with 3% Spirulina resulted in the highest growth performance
in goldfish.

Keywords

• Carassius auratus
• pigmentation
• carotenoid
• spirulina