Tilapia nursery stocking densities in a chemoautotrophic biofloc system

Silva, Bruno Corrêa da; Massago, Haluko; Andrade, Jaqueline Inês Alves de; Serafini, Raphael de Leão; Jatobá, Adolfo

doi:10.1590/1413-7054202246022321

Cited by 8 publications

(4 citation statements)

References 41 publications

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“…The differences between densities among the parameters measured during production were not significant. Similarly, in studies where Nile tilapia were maintained at densities of 800 fingerlings/m³ (average weight: 18 g) and evaluated in nurseries for 44 days, the water quality parameters were maintained; however, the production of decanting solids and biomass was more efficient at densities of 406 fish/m³ (Silva et al, 2022). because more fish occurred in the T40 group; therefore, although the weight of each fish was lower, the total biomass was greater in the T40 group than in the T30 group.…”

Section: Resultsmentioning

confidence: 99%

Stocking density of red tilapia (Oreochromis sp.) reared in a commercial biofloc system in Colombia

Delgado,

Costa,

Scaloppi

2023

Ciênc. agrotec.

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Biofloc technology (BFT) has several advantages, such as low water supply requirements and apparent feed conversion ratio (FCR), and high densities. However, there is no information on adequate densities and their effect on the large-scale production of different species. In this study, we determined the effects of the stocking density of monosex red tilapia reared using BFT on the growth performance, water quality parameters, and chemical characteristics of fish on a large scale and under culture conditions in eastern Colombia. In total, six circular tanks (diameter: 14 m, height: 1 m, and capacity: 153 m³) were used in this investigation. Two stocking densities were considered: treatment 1 (T30: 30 fish/m³) and treatment 2 (T40: 40 fish/m³), in triplicate. The water quality parameters of the two treatment densities were within the normal ranges for the species, but dissolved oxygen decreased throughout the production process. The T30 and T40 treatments did not result in significant differences in growth performance. At the end of the trial, the FCRs were 1.6 and 1.7 from T30 and T40, respectively. Fishes raised at a lower density had a similar weight gain; however, their final biomass was not significantly different. BFT did not affect the nutritional characteristics of fish; the percentage of protein (%) in tilapia was 17.81% ±1% and 16.72% ±1% in the T30 and T40 groups, respectively. None of the fish were infected by Salmonella spp. or Vibrio cholerae.

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Section: Resultsmentioning

confidence: 99%

Stocking density of red tilapia (Oreochromis sp.) reared in a commercial biofloc system in Colombia

Delgado,

Costa,

Scaloppi

2023

Ciênc. agrotec.

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“…Poor water conditions can also inhibit fish growth performance. Aquaculture ponds that contain high particles from the left-over feed and fish excretion can increase the NH3, NO2, TDS in water, and decrease the pH and DO, which all these parameters are needed to be in the optimum level to accelerate the fish growth (de Silva et al, 2022;Laza et al, 2021;Setyono et al, 2023). Studies have shown that exposure to suspended sediments can impact the gill structure and microbiome of fish larvae, potentially influencing the distribution patterns of fish assemblages (Hess et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Fish Growth Performance in RAS Pond Using Hydrocyclone Mechanical Filter

Rahmawati,

Supriatin,

Andayani

et al. 2024

jppipa, pendidikan ipa, fisika, biologi, kimia

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The high feeding and the metabolic output of the fish in intensive aquaculture can cause various problem, such as poor water quality and slowing down the fish growth performance. Recirculating Aquaculture System (RAS) is a solution to maintain water quality. Unfortunately, the conventional mechanical filter in RAS such as japmat is inefficient. One strategy that can be applied is to use a hydrocyclone. This research aims to observe the fish growth performance in RAS pond using hydrocyclone mechanical filter and its comparison with the use of japmat. Research method was performed by comparing hydrocyclone and japmat in the pond with the RAS system. The research design is completely randomized design (CRD), with three replications in each treatment. The research was carried out through five stages, namely hydrocyclone set-up, RAS ponds set-up, water quality analysis, fish growth measurement, and statistical analysis. Based on the Independent Samples Test, the use of hydrocyclone mechanical filters has a significant effect (P<0.05) on the measured water quality parameters (DO, Temperature, pH, TDS, NH3) except for NO2. Hydrocyclone significantly affect Average Daily Growth and Specific Daily Growth parameters. Whilst, the Survival Rate and Feed Conversion Ratio parameters, it did not give significant effect

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“…Conversely, using low stocking densities may not be economically viable, resulting in lower productivity per unit area and ine cient use of natural resources, leading to reduced biomass production (Inoue et al, 2014;Silva et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Stocking Density of the Pangasius Hypophthalmus Reared in Raceway System

Rodrigues,

Gomides,

Arnhold

et al. 2023

Preprint

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The objective was to evaluate the impact of stocking density on the productive and physiological parameters of Pangasius hypophthalmus throughout the production period. The experiment followed a completely randomized design with five treatments and four replications, resulting in a total of 20 experimental units. The densities tested were as follows: 30, 50, 70, 90, and 110 fish/m³, which corresponded to 15, 25, 35, 45, and 55 fish per box, respectively. The experimental period lasted 90 days. Stocking density did not influence feed conversion ratio, mortality, carcass yield, serum biochemical profile, or hematology. Body weight gain and feed intake responded linearly to the different densities. The limnological variables of temperature, pH, and dissolved oxygen were not affected, unlike nitrite (NO2), total ammonia (NH4+ + NH3), and non-ionized ammonia (NH3) levels, which rose linearly with increasing stocking density. In conclusion, it is advisable to consider stocking densities above 87 fish/m3 for the intensive cultivation of P. hypophthalmus in tropical climatic conditions.

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Tilapia nursery stocking densities in a chemoautotrophic biofloc system

Cited by 8 publications

References 41 publications

Stocking density of red tilapia (Oreochromis sp.) reared in a commercial biofloc system in Colombia

Stocking density of red tilapia (Oreochromis sp.) reared in a commercial biofloc system in Colombia

Fish Growth Performance in RAS Pond Using Hydrocyclone Mechanical Filter

Stocking Density of the Pangasius Hypophthalmus Reared in Raceway System

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