การใช้คลอเรลล่าอบแห้งเป็นอาหารสำหรับการเพาะเลี้ยงไรแดงแบบมหมวล
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Abstract
This study was carried out to investigate the performance of powdered dried Chlorella sp. as a food source in mass cultivation of water flea (Moina macrocopa) which is the primary important food sources for nursery phase of freshwater fish larvae. Of 4x5 Factorial experiments in Randomized Complete Block Design (20 treatment combinations) with 2 factors; (1) 4 levels of powdered dried Chlorella sp. (PDC; 0.05, 0.10, 0.15 and 0.20 g/L) 2) 5 levels of stocking density of Moina [0.10, 0.15, 0.20, 0.25 and 0.30 g/L (wet weight)] were conducted to compare with fresh Chlorella sp. (FC) at 0.2 g/L (wet weight) stocking density of Moina as a control group for 3 times (replications). Results showed that overall production performances from batch culture at 2-day harvesting (population density, gross production (wet weight) and rate of population increase) were significantly different among all treatments (p < 0.001). Nutritional values between PDC and FC were not different (p > 0.05). The highest production displayed in water flea fed with 0.2 g/L PDC at 0.2 g/L (wet weight) stocking density and was significantly better than water flea raised with FC. Moreover, significantly interaction between PDC level and stocking density were found. These results revealed that stored PDC could be used as food source for mass culture of M. macrocopa when lived Chlorella sp. is limited or unavailable.
Keywords: water flea; powdered dried Chlorella sp.; mass culture
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References
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