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Dietary butyrate alone or in combination with succinate and fumarate improved survival, feed intake, growth and nutrient retention efficiency of juvenile Penaeus monodon

Rombenso, Artur N., Truong, Ha, Simon, Cedric
Aquaculture 2020 v.528 pp. 735492
Penaeus monodon, antibiotics, aquaculture feeds, biomass, butyrates, crude protein, dietary supplements, energy, feed conversion, feed intake, fumarates, growth promotion, juveniles, lipids, nutrient retention, salts, shrimp, succinic acid
Organic acids and their salts have been used in commercial aquafeeds as an alternative to antibiotics, growth promoters and their effect on performance and survival continue to be investigated in aquatic organisms including shrimp with a few reports on Penaeus monodon. We assessed production performance and nutrient retention efficiency of juvenile black tiger shrimp fed diets supplemented without (control – CON) or with organic acids (butyrate - BUT, succinate – SUC, and fumarate - FUM) individually (10 g kg⁻¹) or in combination (ALL; 30 g kg⁻¹). After 42 days, survival was significantly higher in the BUT and ALL treatments compared to the CON (98% and 90% vs. 70%; P < .01). Addition of BUT, SUC, and ALL reduced feed conversion ratio compared to the CON group (1.3–1.7 vs. 2.4; P < .01). Biomass gain in BUT and ALL feeds was statistically higher than the rest of the dietary treatments (28.3 g vs. 11.2–19.1 g; P < .01). Non-linear and linear regressions displayed a strong relationship between biomass gain and total feed intake across dietary treatments with R² varying from 0.71 to 0.99. The supplementation of SUC, BUT, and ALL increased the overall nutrient retention efficiency (RE) in comparison to the CON, with BUT and ALL displaying the highest RE for all tested macronutrients (e.g., crude protein = 26.7% and 24.6% vs. 15.3%, total lipid = 19.2% and 17.7% vs. 10.6%, ash = 25.1% and 23.1% vs. 12.1%, and gross energy = 17.7% and 16.3% vs. 10.2%). In summary, supplementation of ALL organic acids (fumarate, butyrate, and succinate) improved survival, feed intake, growth, and nutrient retention efficiency of juvenile P. monodon. Individually, BUT appears to be the most potent organic acid followed by SUC, whereas the use FUM isn't justified in P. monodon diets.