Productivity of Fish and Crop Growth and Characteristics of Bacterial Communities in the FLOCponics System

Aquaponics (AP) and biofloc technology (BFT) systems rely heavily on bacterial communities to break down organic matter and cycle nutrients that are essential for fish and plant growth. The functional roles of bacterial communities in aquaculture systems are critical to their sustainable operation....

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Bibliographic Details
Published in:Fishes 2023-08, Vol.8 (8), p.422
Main Authors: Hwang, Ju-Ae, Park, Jun Seong, Jeong, Hae Seung, Kim, Hyeongsu, Oh, Seung-Yoon
Format: Article
Language:English
Subjects:
Aestuariivirga
Anguilla japonica
Aquaculture
Aquaponics
Bacillus
Bacteria
Biofloc technology
Body weight
Catadromous species
Density
Design
Ecology
Eels
Environmental aspects
Experiments
Fish
Fisheries
Growth rate
Lettuce
Marine fishes
metabarcoding
Microbial colonies
microbiota
Microorganisms
Nutrient cycles
Nutrients
Organic matter
Physicochemical processes
Physicochemical properties
Plant growth
Polyculture (aquaculture)
Productivity
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Summary:Aquaponics (AP) and biofloc technology (BFT) systems rely heavily on bacterial communities to break down organic matter and cycle nutrients that are essential for fish and plant growth. The functional roles of bacterial communities in aquaculture systems are critical to their sustainable operation. Currently, the research on the combination of BFT and AP systems called FLOCponics (FP) is lacking, thereby hindering our ability to optimize their performance. Here, several characteristics (productivity of fish and crops, physicochemical properties of water, and bacterial community) in FP systems cultivating Japanese eel (Anguilla japonica) and leaf lettuce Caipira (Lactuca sativa) were compared to those in the BFT system. Additionally, the effect of fish density on the FP system was investigated. The results indicated that the FP system was more productive than the BFT system. Fish growth rate was highest in the FP system (52.6%), and the average body weight of eels was 168.2 ± 26.8 g in the FP system compared to 140.3 ± 27.0 g in the control (BFT, 5 kg/m2). However, increasing fish density resulted in lower growth rates, with a growth rate of 20.6% observed in the high-density (20 kg/m2) experimental group. The bacterial composition was also significantly different between the systems and fish densities, suggesting that bacterial communities may be closely related to the performance of the aquaponics system.
ISSN:2410-3888
2410-3888
DOI:10.3390/fishes8080422