Authors : M. Ayce Genc and Berrin Ebeoglu
Abstract: The present study was to test the effects of mannan oligosaccharides (2 and 4 g kg-1) in different salinity (s) levels (20 and 38‰) on growth of white shrimp, Litopenaeus vannamei. Research was continued 80 days. For 6 groups and 3 replicates, 18 aquarias were used (80x40x40 cm, 15 Litopenaeus vannamei/aquarium, 0.43±0.44 g). Experimental groups were used as M0-s20 (0 g kg-1 MOS-20‰ s), M2-s20 (2 g kg-1 MOS-20‰ s), M4-s20 (4 g kg-1 MOS-20‰ s), M0-s38 (0 g kg-1 MOS-38‰ s), M2-s38 (2 g kg-1 MOS-38‰ s) and M4-s38 (4 g kg-1 MOS-38‰ s). The results of the experiment indicated that the diet supplemented with 0, 2 and 4 g MOS kg-1 in 38‰ salinity (M0-s38, M2-s38, M4-s38) and the control group in 20‰ salinity (M0-s20) enhanced the growth parameters (p<0.05) including the final body weight, live weight gains, daily weight gains and specific growth. At the end of the study the highest live weight gain were detected as 6.65±1.874 g in M4-s38, 6.57±2.134 g in M2-s38, 6.21±2.164 g in M0-s20, 5.88±2.345 g in M0-s38 groups, respectively and the lowest live weight gains were found as 4.66±2.075 g in M2-s20 and 4.74±1.399 g in M4-s20 groups (p<0.05). Respects of the growth and survival rates, the more successful groups were found in 38‰ salinity conditions. Additionally, comparing with the hepatopancreas histology no differences were detected between the groups. In conclusion, MOS supplementation in low salinity level was not promoting the growth parameters in L. vannamei.
M. Ayce Genc and Berrin Ebeoglu, 2013. The Effects of Different Salinity and Supplemented Mannan Oligosaccharides (MOS) on Growth of Litopenaeus vannamei (Penaeus: Decapoda). Journal of Animal and Veterinary Advances, 12: 942-947.