Brycon amazonicus larviculture cannibalism is reduced in biofloc systems

Izel-Silva, Judá; Dos Santos, Raphael Brito; de Medeiros, Paulo Adelino; Suita, Sabrina Medeiros; Wasielesky, Wilson; Fugimura, Michelle Midori Sena; Affonso, Elizabeth Gusmão

doi:10.1016/j.aquaculture.2023.740180

Cited by 5 publications

(4 citation statements)

References 44 publications

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“…Since the use of an alkalinizer was more frequent in the densities of 30 and 45 sh.m − 3 , the amount of salt from the sodium bicarbonate was higher, as well as the amount of organic matter generated, due to the higher densities. Similar results in relation to higher concentration of solids and greater use of alkalinizers were described by Izel Silva et al (2024). In this study, the mean values were < 1,000 µScm − 1 (Table 1), within what is recommended by Boyd (1998) and Boyd and Tucker (1998).…”

Section: Water Qualitysupporting

confidence: 88%

“…In a water recirculation system (WRS), the productivity in the grow out phase can reach 2.5 to 15 kg.m − 3 per cycle (Lima et reducing land occupation and water consumption, thus intensifying production and improving resource management (Assis et al 2020). Another super-intensive system that can intensify production of tambaqui and other species of sh native to the Amazon is bio oc technology (BFT) (Dos Santos et al 2021a;2023a;2023b;Izel-Silva et al 2024). This is presented as an alternative for super intensi cation and optimization of water and area use (Emerenciano et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Stocking densities of Colossoma macropomum in the initial grow out phase using biofloc technology

Montelo,

Santos,

Fugimura

et al. 2024

Preprint

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The objective was to identify the best stocking density in the initial fattening phase of tambaqui (Colossoma macropomum) using biofloc technology (BFT) and evaluate the effects of the densities on water quality, zootechnical performance and the metabolic profile of fish and production costs. Juveniles (56.5 ± 1.69 g) were reared in the densities: 15 (BFT15), 30 (BFT30) and 45 (BFT45) fish.m− 3, in triplicate, for 80 days. The use of BFT inoculum at the beginning contributed the maintenance of adequate ammonia and nitrite concentrations at all densities, though with a higher nitrite concentration in BFT45. Electrical conductivity (EC), nitrite, total suspended solids (TSS), pH, alkalinity and hardness were different (p < 0.05) between BFT15 and BFT45. EC and TSS increased according to the increase in density, and were higher in BFT45. The highest final weight, weight gain, daily weight gain and specific growth rate were observed in BFT15, while the apparent feed conversion was lower for BFT15 and BFT30 compared to BFT45 (p < 0.05). Biomass and productivity were higher (p < 0.05) in BFT45. The values of hematocrit, number of erythrocytes and the hemoglobin concentration were higher in BFT45 (p < 0.05). Regarding production costs, the highest average feed expenditure occurred in BFT45; however, expenditure with electricity was lower at this density. The increase in biomass in BFT45 generated the reduction of the partial average cost (ACp). It can therefore be concluded that the best stocking density for initial fattening of tambaqui is 45 fish.m− 3, since it presents better productivity and biomass, lower ACp and average expenditure on electricity when using BFT.

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Section: Water Qualitysupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Stocking densities of Colossoma macropomum in the initial grow out phase using biofloc technology

Montelo,

Santos,

Fugimura

et al. 2024

Preprint

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“…In this sense, the matrinxã has high commercial interest due to its good acceptance in the consumer market and easy adaptation to con ned systems (Nascimento et al 2020), According to Mattos et al (2013), it has great potential in the Amazon region and other regions of Brazil due to its omnivorous feeding habits and to its excellent production performance rates in various farming systems. However, despite being a species with great productive/economic potential, its production technology still needs to be better structured (IBGE 2021), especially in the larviculture and rearing phase of the species, which presents intraspeci c cannibalism and aggressive behavior (Carvalho et al 2018;Ferreira et al 2020;Izel-Silva et al 2024). It can be demonstrated that the reduction in luminosity due to the turbidity of the water in the bio oc system contributes to a reduction in aggressive behaviour and an increase in the productivity of the species, as previously demonstrated by Izel- Silva et al (2024).…”

Section: Introductionmentioning

confidence: 99%

“…However, despite being a species with great productive/economic potential, its production technology still needs to be better structured (IBGE 2021), especially in the larviculture and rearing phase of the species, which presents intraspeci c cannibalism and aggressive behavior (Carvalho et al 2018;Ferreira et al 2020;Izel-Silva et al 2024). It can be demonstrated that the reduction in luminosity due to the turbidity of the water in the bio oc system contributes to a reduction in aggressive behaviour and an increase in the productivity of the species, as previously demonstrated by Izel- Silva et al (2024). A reduction in light intensity in the water leads to an increase in melatonin production, which in turn reduces the aggressive behaviour of matrinxã larvae and juveniles (Lopes et al 2018;Amaral et al 2020; Souza-Cornélio et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Dietary protein levels for juvenile matrinxã Brycon amazonicus produced in biofloc and clear water systems

Cunha,

Affonso,

Suita

et al. 2024

Preprint

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This study evaluated potential for rearing the matrinxã, Brycon amazonicus, under different crude protein (CP) levels, using production performance, water quality and animal welfare as indicators. To achieve this, 720 juvenile fish (3.65 ± 0.17 g) were distributed across 24 experimental units (200 L) and fee study lasted 60 days. The study followed a factorial design (2x4), with two production systems: Biofloc technology (BFT) and clear water (CW), and four levels of crude protein (CP = 24%, 30%, 36%, and 42%) in the diet, with three repetitions for each. The study found that the BFT system showed a lower total ammonia level. However, the production system did not have any effect on pH or nitrite concentration. Oxygen levels were found to be lower in the 42% CP group. Fish produced in the BFT exhibited better performance of apparent feed conversion, productivity, and survival. The production system affected total leukocytes and neutrophils in the blood. There was no significant difference in carcass crude protein content and the ether extract content was higher in the animals from the BFT system. Nutritional composition of the biofloc showed differences for ash, with lower levels in the 42% CP treatment. In conclusion, juvenile matrinxã can be fed a diet containing 30% CP in both production systems. Furthermore, the results demonstrated that biofloc did not confer a direct benefit to matrinxã juveniles in terms of their feeding, however BFT represented a promising alternative for increasing the survival and improved animal welfare during the rearing phase.

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Stocking densities of Colossoma macropomum in the initial grow-out phase using biofloc technology

Montelo,

dos Santos,

Fugimura

et al. 2024

Aquacult Int

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Brycon amazonicus larviculture cannibalism is reduced in biofloc systems

Cited by 5 publications

References 44 publications

Stocking densities of Colossoma macropomum in the initial grow out phase using biofloc technology

Stocking densities of Colossoma macropomum in the initial grow out phase using biofloc technology

Dietary protein levels for juvenile matrinxã Brycon amazonicus produced in biofloc and clear water systems

Stocking densities of Colossoma macropomum in the initial grow-out phase using biofloc technology

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