Soybean Meal Digestibility-Shrimp

Apparent digestibility coefficients of dry matter, crude protein, crude lipid, gross energy, phosphorus and amino acids in Peruvian fish meal, fermented soybean meal, extruded soybean meal, soybean meal, peanut meal, wheat gluten meal, corn gluten meal, shrimp byproduct meal, meat and bone meal, poultry meat meal and plasma protein meal were determined for white shrimp (Litopenaeus vannamei). A reference diet and test diets (consisting of 70% reference diet and 30% of the feedstuff) were used with 0.5% chromic oxide as an external indicator. A total of 1440 shrimp (initial mean body weight 1.05 ± 0.01 g) were randomly distributed to 36 500-L fiber glass tanks with 40 shrimp per tank and three tanks per diet. The shrimp were fed to apparent satiation four times a day and the feeding experiment lasted for 6 weeks. Digestibility was determined by collecting fecal material.

Results indicated that apparent dry matter digestibilities for white shrimp (L. vannamei) were the highest for the Peruvian fish meal treatment, with the animal products ranging from 52.8–71.2% and plant products 70.0-77.1%. The protein and lipid from plant and animal sources were well digested by white shrimp. Apparent protein and lipid digestibility were in the range 87.9–93.2% and 91.6–95.3%, respectively, in plant products, and 75.0–92.3% and 83.7–92.8%, respectively, for animal products. The white shrimp demonstrated a high capacity to utilize phosphorus in the ingredients. The apparent phosphorus digestibility ranges of animal feedstuffs and plant feedstuffs were 58.9–71.6% and 75.8–82.3% respectively. Amino acid availability reflected protein digestibility, except that in meat and bone meal, for which the availability of some amino acid was lower, possibly due to protein damage during processing. These digestibility values of the soy products would support their use of these ingredients in least-cost formulated diets for white shrimp.



Yang, Qihui and co-workers. 2009. Apparent digestibility of selected feed ingredients for white shrimp Litopenaeus vannamei, Boone. Aquaculture Research 41:78-86.