Abstract
Introduction: Application of prophylactic health products (PHPs) including probiotics, prebiotics, immunostimulants, antimicrobials, bioflocs at different stages of shrimp production are common. Recent survey showed that more than 200 PHPs are available in Bangladesh market (BBSRC UK funded IMAQulate project unpublished data). The evidence of antimicrobial resistance is a serious concern for shrimp disease management and human health.
Objectives: The objectives of the study were to assess the efficacy of commercial PHPs on specific pathogen free (SPF) shrimp (Penaeus monodon) post larvae nursing in tanks.
Methods: The trial conducted in a commercial shrimp hatchery in Bangladesh during June to October 2018. The experiment includes five treatments: feed probiotic, water probiotic, combination of water and feed probiotic, biofloc, combination of biofloc and feed probiotic, and control. Five replicates were used for the treatments and control. SPF P. monodon PL15 were nursed for 29 days in thirty fibreglass tanks, 600 litre capacity each. The dose, frequency and mode of application of probiotics were according to the manufacturer’s instructions. Commercial diet (INVE Aquaculture FRIPPAK RW 500 and FRIPPAK RW 700) were fed to PL during nursing. Water quality (water temperature, dissolved oxygen, alkalinity, pH, total ammonia nitogen, nitrite), total bacteria count (TBC), total vibrio count (TVC), feed conversion ratio (FCR), growth and survival rate were recorded. At the end of nursing, a salinity stress test was conducted to evaluate the control and treated PL quality.
Results: During nursing, no significant differences observed in water temperature, dissolved oxygen, alkalinity, total ammonia nitrogen between control and treatments. At the end of nursing, no significant differences found in FCR, growth, survival, TBC and TVC between control and treatments. In salinity stress test, survival rate was significantly higher in shrimp received a combined treatment of “feed probiotic and biofloc” followed by “biofloc” than other treatments and control.
Conclusion: There was no significant difference in growth, FCR and survival rate between treatments and control. Rearing shrimp in biofloc alone or combined with feed probiotic might increase animal resistance to environmental stressors. Further on-farm trials might be useful to confirm the efficacy of the PHPs.
Objectives: The objectives of the study were to assess the efficacy of commercial PHPs on specific pathogen free (SPF) shrimp (Penaeus monodon) post larvae nursing in tanks.
Methods: The trial conducted in a commercial shrimp hatchery in Bangladesh during June to October 2018. The experiment includes five treatments: feed probiotic, water probiotic, combination of water and feed probiotic, biofloc, combination of biofloc and feed probiotic, and control. Five replicates were used for the treatments and control. SPF P. monodon PL15 were nursed for 29 days in thirty fibreglass tanks, 600 litre capacity each. The dose, frequency and mode of application of probiotics were according to the manufacturer’s instructions. Commercial diet (INVE Aquaculture FRIPPAK RW 500 and FRIPPAK RW 700) were fed to PL during nursing. Water quality (water temperature, dissolved oxygen, alkalinity, pH, total ammonia nitogen, nitrite), total bacteria count (TBC), total vibrio count (TVC), feed conversion ratio (FCR), growth and survival rate were recorded. At the end of nursing, a salinity stress test was conducted to evaluate the control and treated PL quality.
Results: During nursing, no significant differences observed in water temperature, dissolved oxygen, alkalinity, total ammonia nitrogen between control and treatments. At the end of nursing, no significant differences found in FCR, growth, survival, TBC and TVC between control and treatments. In salinity stress test, survival rate was significantly higher in shrimp received a combined treatment of “feed probiotic and biofloc” followed by “biofloc” than other treatments and control.
Conclusion: There was no significant difference in growth, FCR and survival rate between treatments and control. Rearing shrimp in biofloc alone or combined with feed probiotic might increase animal resistance to environmental stressors. Further on-farm trials might be useful to confirm the efficacy of the PHPs.
| Original language | English |
|---|---|
| Publication status | Published - 2019 |
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
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