Parámetros productivos y hematológicos de Piaractus brachypomus suplementados con ácido ascórbico y sometidos a estrés por hipoxia

Corredor-Castillo, Adriana S.; Landines-Parra, Miguel Á.

doi:10.22579/20112629.479

Cited by 1 publication

(3 citation statements)

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Section: Discussionmentioning

confidence: 99%

“…The resulting hematocrit value in our research, which reflects the proportion of erythrocytes in the blood in relation to the amount of leukocytes, thrombocytes, and blood plasma ( Ranzani-Paiva et al , 2013 ), was comparatively lower than that reported for juvenile Piaractus brachypomus raised under biofloc system technology (34.7%) ( Angeles-Escobar et al ., 2021 ) or exposed to hypoxia (37.33%) ( Corredor-Castillo and Landines-Parra, 2018 ). In those cases, it is possible that the exposure to suspended solids or nitrite in biofloc system, or the exposure to a stressor agent such as hypoxia, has led to an increase in hematocrit values as a compensation in the fish to maintain an adequate oxygen transport for its metabolic functions and to maintain homeostasis ( Corredor-Castillo and Landines-Parra, 2018 ; Angeles-Escobar et al ., 2021 ). Nevertheless, although this species is capable of efficiently adjusting its hematological and biochemical responses according to environmental or farming conditions ( Favero et al ., 2022 ), the hematocrit values registered in this trial were in accordance with some commercial farming experiences under proper management of P. brachypomus ( Acosta et al ., 2017 ) and closed to that reported in Ranzani-Paiva et al .…”

Section: Discussionmentioning

confidence: 99%

“…These values were close to that reported for juvenile P. brachypomus farmed in floating cages installed into a lake in the Ucayali region in Peru ( Acosta et al ., 2017 ), but lower than those found for C. macropomum , an Amazonian Serrasalmidae, produced in ponds ( Grande-Fernández et al ., 2023 ). However, hematological parameters in fish could be influenced by external factors, such as the environment, quality and quantity of the aquafeed supplied to fish, the farming system, and internal factors, such as the species, age, reproductive stage, and stress ( Lochmann et al ., 2009 ; Rodrigues, 2018 ; Corredor-Castillo and Landines-Parra, 2018 ). According to Ranzani-Paiva et al .…”

Section: Discussionmentioning

confidence: 99%

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

Ruiz,

vez,

Chaupe

et al. 2024

Open Vet J

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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 (p<0.05). Results: The values of hematocrit (18.31%), leukocytes (1,216.67 mm3), neutrophils (81.27%), lymphocytes (18.73%), albumin (1.08 g/dL), relative growth rate (1.002%/day) and the Fulton allometric condition factor (2.03) remained constant throughout the experiment (p>0.05). 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.

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