Background/Introduction: Formulating a low-cost ornamental fish feed using locally available ingredients is a promising approach to enhancing the aquaculture sector in Bangladesh. Objectives: The present study was conducted to investigate the comparative effects of four types of feeds with different protein sources to observe the growth performance of Guppy (Poecilia reticulata) and Platy (Xiphophorus maculatus). Materials and Methods: The experiment was conducted in the wet laboratory of Zoology Section, Biological Research Division, BCSIR. Four different types of feed including three BCSIR formulated feed and one commercial feed was supplemented to the experimental fish. Physico-chemical parameters of the water and biochemical composition of feed as well as fish was performed periodically. Changes in colour was visually observed to assess feed effects. Results: The overall growth of two fish was significantly different in response to four types of feeds B1, B3, B4 and Market Feed (MF) for the period of twelve weeks. Finally, it showed that the overall effects of four feeds on growth performance were B1>>B3>>MF>>B4. The B4 feed has a higher protein content but still isn't delivering great overall results, aside from coloration. Conclusion: Using B1 and B3 feeds could definitely be a cost-effective alternative to the more expensive imported ornamental fish feeds, while still promoting good growth performance for the livebearers.
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