Effect of different concentrations of molasses and forage with Bacillus lechniformis on the growth of Macrobrachium nipponense in vitro

Abstract

The rearing of juvenile shrimp, Macrobrachium nipponense is of importance in the development of aquaculture, especially by using molasses and Bacillus lechniformis to promote growth. The present study aimed to evaluate the rearing of juvenile shrimp, M. nipponense in laboratory breeding ponds without replacing the water in the presence of B. lechniformis using two strategies: i) Use of molasses (10=A, 50=B, and 100=C mg) with 1 × 10 ⁸ CFUml-1 B. lechniformis to the ponds, with shrimp in initial weight rates (650.00 ± 68.09, 639.67 ± 74.81, 639.67 ± 67.02) mg and final weight rates (695.67 ± 57.33, 825.00 ± 90.14, 761.33 ± 111.02) mg, ii) Use of feed (100=A, 250-B, and 500=C) mg, with shrimp initial weight rates (107.67 ± 21.94, 106.67 ± 20.82, 103.33 ± 18.93) mg and final weight rates (208.33 ± 16.07, 381.67 ± 36.17, 283.33 ± 15.28) mg. Results of statistical analysis for molasses showed significant differences (p < 0.05) in each daily growth (DG), Specific growth rate (SGR), and no significant differences (p > 0.05) in survival rates. As food conversion ratio (FCR), significant differences (p < 0.05) were found between A and B, contrary to C, which showed no significant differences. There were significant differences (p < 0.05) in DG among A, B, and C in using feed. While SGR showed significant differences (p < 0.05) between A and B but did not have significant differences with C and no significant differences (p > 0.05) in the survival rates. FCR showed significant differences (p < 0.05) between C and both A and B, which showed no significant difference (p > 0.05) between them. The study will help to reduce the cost and waste of water.