Comparison of nutritional values of small-scale processed and commercial fishmeal for marine fish culture in Sabah, Malaysia

• Main Author: Chun, Kia Huey
• Format: Thesis
• Language: English
• Published: 2007
• Subjects: SH Aquaculture. Fisheries. Angling
• Online Access: https://eprints.ums.edu.my/id/eprint/3761/1/mt0000000036.pdf

This study was conducted in order to solve the problems of insufficient fishmeal supply for marine fish culture in Sabah, Malaysia. The nutritional values of smallscale processed fishmeal were evaluated as protein source for marine fish culture in comparison with commercial fishmeal. Four species of trash fish (Decapterus macarellus, Rastrelliger kanagurta, Selar crumenopthalmus and Nemipterus thosaporm) were selected and processed into fishmeal in the marine hatchery of Borneo Marine Research Institute, Universiti Malaysia Sabah. Another four types of commercial fishmeal (Malaysian, Peruvian, Danish and enzyme treated Chilean fishmeal) were collected from the market. Dry matter, crude protein, lipid, ash, gross energy and fatty acid compositions of small-scale processed fish meal were compared with those of commercial fish meal. The nutrient composition of the small-scale processed fishmeal consisted of 92-93% of dry matter, 70-74% of crude protein, 8- 10% of crude lipid, 14-19% of crude ash and 19-21kJ per g of gross energy. The fatty acid composition of small-scale processed fish meal mainly consisted of 58-67% of saturated fatty acids, followed by 21-31 % of monounsaturated fatty acids and 4-6% of polyunsaturated fatty acids. For commercial fish meal, the nutrient compositions consisted of 93-97% of dry matter, 56-74% of crude protein, 10-21 % of crude lipid, 5- 28% of crude ash and 20-25kJ per g of gross energy. The fatty acid composition consisted of 22-42% of saturated fatty acids, 22-32% of monounsaturated fatty acids and 26-35% of polyunsaturated fatty acids. Nutritional value of small-scale processed fishmeal made from D. macarellus was then compared to Peruvian fishmeal through biological assays. Enzyme treated Chilean fishmeal was set as a control. Growth performance, apparent digestibility coefficients and nutrient retentions were compared on Pagrus major juveniles fed with three different feeds. The feeds were F.DM (feed containing 65% of D. macarellus meal), F.PRN (feed containing 65% of Peruvian fish meal) and F.ETC (feed containing 65% of enzyme treated Chilean fishmeal). The P. major juveniles fed with F.DM showed the highest survival and daily feeding rates. Feed efficiency, nutrient retention and protein digestibility were higher than those fed with F.PRN but lower than those fed with F.ETC. Gross energy digestibility was the lowest in those fed with F.DM and crude lipid digestibility was not Significantly different (P>0 .05) among the three feeds. The results on nutrient contents and nutrient and energy utilization indicated that small-scale processed fishmeal can be used as a protein source for marine fish culture.