Effects of peptides and probiotics supplementation via diet on blood parameters and growth performance of Piaractus brachypomus during the growth-out phase

Autor: Angui Arely Paico-Ruiz, Cesar Augusto Villanueva Chavez, Nieves Nancy Sandoval Chaupe, Carlos Andre Amaringo Cortegano
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Open Veterinary Journal, Vol 14, Iss 6, Pp 1384-1393 (2024)
Druh dokumentu: article
ISSN: 2226-4485
2218-6050
DOI: 10.5455/OVJ.2024.v14.i6.6
Popis: Background: There is no evidence of peptides-probiotics symbiosis as supplements in aquafeeds. Aim: To evaluate the effect of peptides and probiotics supplementation via diet on blood parameters and growth performance of juvenile P. brachypomus, an Amazonian fish, during the growth-out phase. Methods: 120 juvenile P. brachypomus (242.77 g) were placed into twelve 200-L tanks (10 fish/tank), housed in an indoor open system with constant water renovation (flow rate:1.50 L/min). The experiment used a completely randomized design with a 4×5 factorial arrangement [4 doses of supplementation (CD: commercial diet; PepD: CD+1.50% of peptides per CD weight; ProD: CD+40.00 mL of activated probiotics per kg of diet (Lactobacillus spp., Rhodopseudomonas spp., Saccharomycetes spp.); PepProD: CD+Pep+Pro); 5 sampling times (0, 2nd, 4th, 6th, 8th week); n=3]. Fish were fed twice a day at a feeding rate of 1% of body weight. At each sampling time, blood was collected and fish were measured for growth performance analysis. Data was analyzed by using two-way ANOVA and Tukey's test (p0.05). Plasma glucose decreased for all fish in the 2nd week (59.56 mg/dL); then, that level increased in fish fed with the CD (89.00 mg/dL), while fish fed with PepD, ProD and PepProD showed constant values (57.22 mg/dL). The plasma protein levels were constant in fish fed with the PepD and PepProD, (p>0.05), while fish fed with the CD and ProD showed non-constant and higher values. At the end of the trial, fish fed with the PepProD showed the highest weight gain and the lowest feed conversion rate (39.66 g; 0.97). Conclusion: It is possible to maintain the stability of plasma glucose and plasma protein by supplementing diets with peptides, but the peptides-probiotics symbiosis administrated via diet contributes to maintain the stability of plasma glucose and plasma protein and to improve the growth performance of juvenile P. brachypomus during the growth-out phase. [Open Vet J 2024; 14(6.000): 1384-1393]
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