Replacement of fish meal by enzyme‐treated soybean on the growth performance, intestine microflora, immune responses and disease resistance of Pacific white shrimp Litopenaeus vannamei

2021 ◽  
Author(s):  
Yu Fan ◽  
Kai Luo ◽  
Yanlin Guo ◽  
Weihua Gao ◽  
Qiaoqing Xu ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Immune Responses ◽  
Growth Performance ◽  
Litopenaeus Vannamei ◽  
Fish Meal ◽  
Pacific White Shrimp ◽  
White Shrimp

scholarly journals Effects of spray-dried animal plasma on growth performance, survival, feed utilization, immune responses, and resistance to Vibrio parahaemolyticus infection of Pacific white shrimp (Litopenaeus vannamei)

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257792
Author(s):  
Niti Chuchird ◽  
Tirawat Rairat ◽  
Arunothai Keetanon ◽  
Putsucha Phansawat ◽  
Chi-Chung Chou ◽  
...  
Keyword(s):  
Immune Responses ◽  
Growth Performance ◽  
Litopenaeus Vannamei ◽  
Vibrio Parahaemolyticus ◽  
Positive Control ◽  
Feed Utilization ◽  
Pacific White Shrimp ◽  
White Shrimp ◽  
Total Hemocyte Count ◽  
Spray Dried

Spray-dried animal plasma (SDP) in feed for several animal species provides health benefits, but research about use of SDP in shrimp feed is very limited. The objectives of the present study were to investigate the effects of dietary SDP on growth performance, feed utilization, immune responses, and prevention of Vibrio parahaemolyticus infection in Pacific white shrimp (Litopenaeus vannamei). In Experiment 1, the post-larvae were divided into five groups (four tank/group and 80 shrimp/tank) and fed four times daily diets with porcine SDP at 0, 1.5, 3, 4.5, and 6% of the diet for 45 days. In Experiment 2, the surviving shrimp from Experiment 1 were redistributed into six groups: four SDP groups as in Experiment 1 plus the positive and negative controls (four tank/group and 30 shrimp/tank). They were then challenged with V. parahaemolyticus by immersion at 105 colony-forming units (CFU)/mL and were fed with the same diets for another 4 days. In Experiment 1, shrimp fed 4.5% or 6% SDP diets had significantly higher body weight, survival rate, and improved feed conversion ratio. The immune parameters (total hemocyte count and phagocytic, phenoloxidase, and superoxide dismutase activities) of the shrimp fed 3–6% SDP diets also showed significant enhancement compared to the control. In Experiment 2, the survival rates of the 3–6% SDP groups were significantly higher than the positive control at day 4 after the immersion challenge. Likewise, the histopathological study revealed milder signs of bacterial infection in the hepatopancreas of the 3–6% SDP groups compared to the challenged positive control and 1.5% SDP groups. In conclusion, shrimp fed diets with SDP, especially at 4.5–6% of the diet, showed significant improvement in overall health conditions and better resistance to V. parahaemolyticus infection.

scholarly journals Digestibility of insect meals for Pacific white shrimp (Litopenaeus vannamei) and their performance for growth, feed utilization and immune responses

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0260305
Author(s):  
Jaehyeong Shin ◽  
Kyeong-Jun Lee
Keyword(s):  
Fatty Acids ◽  
Immune Responses ◽  
Litopenaeus Vannamei ◽  
Fish Meal ◽  
Control Diet ◽  
Saturated Fatty Acids ◽  
Pacific White Shrimp ◽  
White Shrimp ◽  
Black Soldier Fly ◽  
Amino Acid Availability

This study was conducted to examine digestibility of insect meals for Pacific white shrimp (Litopenaeus vannamei) and their utilization as fish meal substitutes. The tested insect meals were mealworm, silkworm, black soldier fly, rice grasshopper, two-spotted cricket, dynastid beetle and white-spotted flower chafer. Apparent digestibility coefficients of the tested insect meals were 83–89% for protein, 91–98% for lipid, 84–90% for energy, 77–81% for dry matter, 28–36% for chitin, 76–96% for amino acids and 89–93% for fatty acids. The amino acid availability of insect meals was high in taurine (93–96%), arginine (91–95%) and lysine (90–95%). Availability of fatty acids were 89–93% for saturated fatty acids, 90–93% for monounsaturated fatty acids and 88–93% for polyunsaturated fatty acids. For a feeding trial, a control diet was formulated using 27% tuna byproduct meal as a fish meal source and seven other diets were prepared replacing 10% tuna byproduct meal in the control diet with each insect meal. Triplicate groups of shrimp (initial body weight: 0.17 g) were fed the diets for 65 days. The growth performance was significantly improved when the shrimp were fed black soldier fly or dynastid beetle included diet. Dietary supplementation of insect meals significantly improved non-specific immune responses and antioxidant enzyme activity in the shrimp. These results indicate that the tested insect meals have high potentials to be used as a protein source that could replace fish meal in diets for the shrimp.

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