Effects of biofloc under different carbon sources and protein levels on water quality, growth performance and immune responses in black tiger shrimp Penaeus monodon (Fabricius, 1978)

By Sujeet Kumar, P. Anand, D. De, A. Deo, T. Ghoshal, J. Sundaray, A. Ponniah, K. P. Jithendran, R. A. Raja, G. Biswas and 1 more. 2017

110 citations recorded by the source corpus.

A 75-day 2 × 3 factorial experiment was conducted to evaluate the effect of two levels of dietary protein (32 and 40%) and two different carbon sources (rice flour–R and molasses-M), and without carbohydrate (control–C) in black tiger shrimp Penaeus monodon juveniles (3.37 ± 0.04 g) at 100 nos. m−3 in 100 L fibre reinforced plastic tanks. Biofloc volume and total suspended solid were higher in molasses added groups (32 + M and 40 + M) followed by rice flour (32 + R and 40 + R) and controls (32C and 40C). Molasses and rice flour addition significantly reduced (P < 0.01) the total ammonia–N compared to controls. The highest Vibrio, Bacillus and Lactobacillus counts were recorded in 40 + M, 32 + M and 32 + R respectively. Among the treatments, significantly higher (P < 0.01) final body weight was recorded in 40 + R (8.5 ± 0.3 g), 40 + M (7.8 ± 0.3 g) and 32 + R (7.5 ± 0.4 g) compared to control groups, 32C (6.1 ± 0.3 g), 40C (6.4 ± 0.3 g) and molasses added group, 32 + M (5.7 ± 0.4 g). Rice flour supplementation significantly increased (P < 0.01) the total haemocyte count (×106 cells mL−1) in 32 + R (45.7 ± 3.7) and 40 + R (44.3 ± 3.1) compared to controls, 32C (27.3 ± 3.4) and 40C (25.8 ± 0.9). Similarly, higher superoxide dismutase, catalase, serum protein and glucose were recorded in the rice flour added groups, 40 + R followed by 32 + R. Among the treatments, the highest level of prophenoloxidase (OD 490 nm, 0.3 ± 0.0) and survival after challenge with Vibrio harveyi (55.6%) was observed in 32 + R. The study elucidates that rice flour addition produces optimum level of biofloc with better growth and immune responses compared to molasses and control. Furthermore, rice flour addition at 32% protein level could replace 40% protein feed.

Subfields: Aquatic Science, Immunology

View Paper: https://www.semanticscholar.org/paper/b71231ea8164d5e92c6f40e76912b2e8f5a6a6b8

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In Aquatic Science

  1. J. Syama Dayal
  2. A. Panigrahi
  3. M. Sundaram
  4. Saranya Chakrapani
  5. S. Rajasekar
  6. G. Chavali

In Immunology

  1. J. Syama Dayal
  2. A. Panigrahi
  3. M. Sundaram
  4. Saranya Chakrapani
  5. S. Rajasekar
  6. G. Chavali

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