Abstract
An experiment was conducted over a period of 6 weeks to investigate the colour development in Puntius titteya (Cherry barb) using four different feed under indoor (aquarium illumination) and outdoor conditions (sunlight). The four different feeds namely Artemia, plankton, formulated feed and combination of plankton and formulated feed served as four treatments which were maintained in tanks in triplicated, each having 10 fish. Colour of fish was compared with a colour chart, which was developed by using Windows 2000- computer package and colour intensity ranged between score of 245 (faint pink) to 167 (dark red). Though Kruskal-Wallis test did not indicate a significant difference (p > 0.05) in colour development under the indoor conditions, it was significantly different among the test diets (p < 0.05) under the outdoor conditions. The performance of colour development with respect to feeds could be arranged in a descending sequence as, plankton feed > plankton and formulated feed > formulated feed > Artemia. Friedman test revealed that the difference of light did not significantly affect the colour development (p > 0.05) under the indoor and outdoor conditions.
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