Development of a fish base biscuit using Orinoco catish (Pterygoplichthys multiradiatus)

Abstract

Attached

Inland fishery industry plays a major role of human nutrition and livelihoods in rural communities. Orinoco Sailfin Catfish (OSC) is an invasive alien species colonized inland water bodies has become a problematic fish. Although, it can be use as a food fish , the direct introduction to local consumers is arduous since it is popular as an aquarium fish. Because the abundance of the biscuit consumption by Sri Lankans, it is a good carrier to give the OSC as a food source. In this study, OSC flour incorporated about 19 % to a biscuit recipe and compared these with biscuits without fish flour . The sensory attributes between two types of biscuits were not significantly different. The moisture, ash, crude protein, and total fat contents in fish based biscuit and non-fish based biscuit were 02.28 ± 0.06% , 03.69 ± 0.13 %, 29.04 ± 0.36 %, 13.61 ± 0.26 %, 02.38 ± 0.026 %, 03.81 ± 0.02 %, 10.71 ± 0.06 %, and 12.71 ± 0.01 % indicating higher protein content in fish based biscuit. The SF, MUFA, and PUFA contents of OSC flour based biscuit and non-fish based biscuit were 26.35 %, 36.28 %, 37.18 %, 26.11%, 35.90 % and 37.81 % in total ' fat content. The S/U, omega6/omega3 ratios of OSC flour based biscuit and non-fish based biscuit were 0.36, 13.58, 0.35 and 14.82. The lower ratio of omega6: omega3 and 0.16 % of Eicosapentaenoic acid provide better nutritional benefits for the OSC incorporated biscuit. The pH, moisture content, water activity and free fatty acid value of the final product was within safety limits and their variations for a three week period were not significantly different. The peroxide value and Presumptive Coliforms were not detected and aerobic plate count, yeast and mold were below the maximum allowable limits within this period. The cost of 100 g of product was 40.48 LKR.