Digestive enzymes and parasitology of Nile tilapia juveniles raised in brackish biofloc water and fed with different digestible protein and digestible energy levels

Durigon, Emerson Giuliani; Almeida, Ana Paula Gottlieb; Jerônimo, Gabriela Tomas; Baldisserotto, Bernardo; Emerenciano, Maurício Gustavo Coelho

doi:10.1016/j.aquaculture.2019.03.022

Cited by 43 publications

(12 citation statements)

References 47 publications

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“…Microbial communities in the biofloc systems act like probiotics (Aguilera-Rivera et al, 2014) and positively affect digestive and hepatic enzymes (Adorian et al, 2019). Different conditions include temperature (Apún-Molina et al, 2009), pH (Márquez et al, 2012), feeding habits (Seixas Filho et al, 2000), diet composition (Durigon et al, 2019;Hakim et al, 2006), nitrogen conversion pathway (heterotrophic or autotrophic) (Becerra-Dorame et al, 2012) and production system as cage or pond (Santos et al, 2016) affect growth performance and digestive enzymes' activity in cultured species.…”

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confidence: 99%

The Effect of Adding Molasses in Different Times on Performance of Nile Tilapia (Oreochromis niloticus) Raised in a Low-Salinity Biofloc System

Khanjani

Alizadeh

Mohammadi

et al. 2021

Annals of Animal Science

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This study aimed to evaluate the effect of adding molasses in different times on water quality, growth performance, body biochemical composition, digestive and hepatic enzymes of Nile tilapia in the biofloc system. Tilapia fingerlings (1.53 ± 0.14 g) were distributed in five treatments include control, BFT24 (adding molasses to the tanks every 24 h), BFT48 (48 h), BFT72 (72 h), and BFT96 (96 h) and reared for 37 days in fiberglass tanks (130 L), with a stocking density of one fish per litre. The results showed that highest increase in biomass (740.12 g) and survival (98.97 %) were obtained in BFT24 treatment (P <0.05). The body composition was affected by the experimental treatments so that the highest protein content was obtained in the BFT72 (P<0.05). Digestive enzymes activities were significantly (P<0.05) higher in BFT treatments than the control group. The current study showed, higher biomass and survival ratio for Nile tilapia were observed in BFT24 treatment. The liver and digestive enzymes of Nile tilapia were affected by the different addition times of molasses to the rearing tanks.

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confidence: 99%

The Effect of Adding Molasses in Different Times on Performance of Nile Tilapia (Oreochromis niloticus) Raised in a Low-Salinity Biofloc System

Khanjani

Alizadeh

Mohammadi

et al. 2021

Annals of Animal Science

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“…This is because the probiotics in the bioflocs can perfect the intestinal flora structure and feed digestion and utilization of R. lagowski (Chen, Ren, Li, et al, 2018; Yu, Wu, Zheng, et al, 2020). Early studies have found that bioflocs contain unicellular algae, plankton, bacteria and granular organisms, and their internal microbial community structure is complex and contains a variety of beneficial microorganisms, so the feeding of R. lagowski bioflocs in the BFT system can promote the activities of PRS and AMS, and then improve the feed utilization rate (Chen, Ren, Wang, et al, 2018; Durigona, Almeidab, Jerônimoc, Baldisserottod, & Emerenciano, 2019; Long et al., 2015).…”

Section: Discussionmentioning

confidence: 99%

Influence of differential protein levels of feed on growth, copper‐induced immune response and oxidative stress of Rhynchocypris lagowski in a biofloc‐based system

Huang

et al. 2020

Aquacult. Nutr.

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This study compared the influences of differential protein levels of feed on growth, copper-induced digestive enzyme activity, immune response, oxidative stress and Nrf2 signalling molecules genes expression of Rhynchocypris lagowski in a bioflocbased system and traditional autotrophic system. Four hundred and fifty R. lagowski were fed four experimental dietary containing graded levels of protein from 25% to 37% (referred as biofloc technology [BFT]25, BFT29, BFT33 and BFT37, respectively) in a biofloc-based system, and 37% crude protein level (control group) were cultured in an autotrophic system in 8 weeks. At the end of the trial, there was an improvement of 50.35%-61.64% in terms of growth performance (weight gain rate); 0.25-0.53 (U/mg prot) amylase; 6.9-8.02 (U/ml) lysozyme (LZM); and 7.98-8.12 (U/ ml) total superoxide dismutase (T-SOD) in R. lagowski cultured in BFT37 groups as compared to control. Obviously, the growth performance, digestive enzymes activity, immune response, antioxidant statue and antioxidant-related genes expression of R. lagowski fed with the same protein level in BFT system were significantly higher than those in the control group (p < .05). Furthermore, the level of T-SOD in liver and kidney and interferon-γ in liver of BFT33 group were also significantly higher than that of control group (p < .05). Moreover, there was no notable difference of LZM, alkaline phosphatase, complement C3, C4, heat shock proteins 70, heat shock proteins 90, insulin-like growth factor I, glutathione peroxidase, catalase, total antioxidant capacity, malondialdehyde, Ascorbic acid in gill, liver, kidney, gut and serum among the BFT29 groups and those in the control (p > .05). Besides, bioflocs assists in regulating the expression of Nrf2 signalling molecules including Nrf2, Keap1, Maf, HO-1, CAT, CuZn-SOD, GPX and GCLC. We summarized that despite the low protein content in feed, BFT system has the potential to promote growth performance, alleviate copper-induced immunosuppression and oxidative stress of juvenile R. lagowski.

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“…Digestive enzymes can directly or indirectly affect the digestion and absorption of nutrients, thus affecting the health of fish (Durigona et al., 2019; Long et al., 2015). Many studies have shown that biofloc can effectively increase the activity of digestive enzymes and promote the digestion of aquatic animals (Chen, Ren, Li, et al., 2018; Chen, Ren, Wang, et al., 2018; Long et al., 2015).…”

Section: Discussionmentioning

confidence: 99%

Dietary supplementation with biofloc promotes growth, improves immune and antioxidant status, and upregulates NF‐κB/Nrf2 signalling molecules and stress resistance in Rhynchocypris lagowskii Dybowski

Dai

et al. 2020

Aquacult. Nutr.

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Bioflocs are rich in a variety of probiotics and bioactive compounds, which have been documented to promote growth, regulate antioxidant status and enhance the immune system. A 60‐day experiment was conducted to investigate the effects on growth, antioxidant and immune status, NF‐κB/Nrf2 signalling molecules and stress resistance in juvenile Rhynchocypris lagowskii Dybowski fed different dietary biofloc supplementations. Four hundred fifty R. lagowskii were fed five experimental diets containing graded levels of biofloc from 0 to 160 g/kg (referred to as B0, B4, B8, B12 and B16, respectively). The results showed that biofloc supplementation markedly promoted growth performance (weight gain rate, specific growth rate); improved amylase, lipase and protease activity; and enhanced the activities of glutathione peroxidase, catalase, total superoxide dismutase, total antioxidant capacity, lysozyme, complement C3, complement C4 and immunoglobulin M in the gill, hepatopancreas, kidney, gut and serum. The malondialdehyde content was significantly reduced with treatment B12. In addition, the levels of heat shock protein 70, heat shock protein 90, interferon‐γ and insulin‐like growth factor I were substantially increased with treatment B12 compared to those with the control treatment. Furthermore, biofloc assisted in regulating the expression of NF‐κB/Nrf2 signalling molecule genes, including NF‐κB, TNF‐α, IL‐1β, IL‐8, IL‐10, TGF‐β, Nrf2, Keap1, Maf, HO‐1, CAT, GPX, GCLC and CuZn‐SOD. Overall, our results suggest that dietary supplementation with biofloc can promote growth, improve immune and antioxidant status, and enhance NF‐κB/Nrf2 signalling molecule expression and stress resistance in juvenile R. lagowskii. A suitable supplementation level of approximately 120 g/kg biofloc is recommended in the present study.

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Digestive enzymes and parasitology of Nile tilapia juveniles raised in brackish biofloc water and fed with different digestible protein and digestible energy levels

Cited by 43 publications

References 47 publications

The Effect of Adding Molasses in Different Times on Performance of Nile Tilapia (Oreochromis niloticus) Raised in a Low-Salinity Biofloc System

The Effect of Adding Molasses in Different Times on Performance of Nile Tilapia (Oreochromis niloticus) Raised in a Low-Salinity Biofloc System

Influence of differential protein levels of feed on growth, copper‐induced immune response and oxidative stress of Rhynchocypris lagowski in a biofloc‐based system

Dietary supplementation with biofloc promotes growth, improves immune and antioxidant status, and upregulates NF‐κB/Nrf2 signalling molecules and stress resistance in Rhynchocypris lagowskii Dybowski

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