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Evaluation of importance of Orinoco Sailfin Catfish (Pterygoplichthys multiradiatus) as a food source

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  • The Orinoco Sailfin Catfish (OSC) is an invasive fish species introduced into local water bodies through the ornamental fish industry in Sri Lanka. Freshwater aquaculture is a key element that strengthens the rural economy while fulfilling nutritional needs of rural populations. At present, growth of OSC is adversely affecting the freshwater fishery industry. The objective of this study was to evaluate the nutritional and economic importance of OSC to turn this tragedy into wellbeing of fisherfolk. Samples collected from inland reservoirs were analyzed for edible flesh yield, proximate composition, trace metal content, fatty acid profile and consumer acceptance. Edible portion of the flesh was about 30.62 +/- 2.98% from total weight. Moisture, protein, fat and ash were 81.02+/- 0.90, 17.79 +/- 0.72, 0.58 +/- 0.18 and 1.12 +/- 0.11, respectively. According to the fatty acid profile total PUFA and DHA were approximately 33.70% and 12.99%, respectively. Ratios of PUFA/SFA and Omega-6/Omega-3 were approximately 1.29 and 0.75, respectively. Mean values of trace metal such as Hg, Pb, and Cd were below the safety limits of EU regulations. Consumer acceptance was evaluated for the fresh, fried and salted dried OSC fillets and compared with Thilapia (Oreochromis mossambicus). Salted dried OSC fillets obtained the highest rank for the hedonic test indicating significant difference from the salted dried Thilapia fish fillets. Based these findings, it can be concluded that OSC can be used effectively to strengthen the rural economy and fulfill the nutrient requirements of the rural population.
  • Keywords: Modeling and Economic Theory, Environment: Invasive Species, Fisheries Economics
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  • Ariyarathna, Durayalage Suseema, S.B.N. Ahmad, B.K.K.K. Jinadasa, I. Wickramasinghe, J.H.K.N. Jayawardena. 2014. Evaluation of importance of Orinoco Sailfin Catfish (Pterygoplichthys multiradiatus) as a food source. In: Towards ecosystem based management of fisheries: what role can economics play?: Proceedings of the Seventeenth Biennial Conference of the International Institute of Fisheries Economics and Trade, July 7-11, 2014, Brisbane, Australia. Complied by Ann L. Shriver & Melissa Errend. Corvallis, OR: International Institute of Fisheries.
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  • Fisheries Research & Development Corporation, World Wildlife Fund, MG Kailis Group, AquaFish Innovation Lab, NOAA Fisheries, The European Association of Fisheries Economists, Japan International Fisheries Research Society, United Nations University, NORAD
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