Evaluation of Trophic Structure and Energy Flow in a Pelteobagrus fulvidraco Integrated Multi-Trophic Aquaculture System

Yuxi Zhao, Xingguo Liu (), Ming Lu, Runfeng Zhou, Zhaoyun Sun and Shuwen Xiao
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Yuxi Zhao: Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, 63 Chifeng Road, Shanghai 200092, China
Xingguo Liu: Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, 63 Chifeng Road, Shanghai 200092, China
Ming Lu: Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, 63 Chifeng Road, Shanghai 200092, China
Runfeng Zhou: Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, 63 Chifeng Road, Shanghai 200092, China
Zhaoyun Sun: Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, 63 Chifeng Road, Shanghai 200092, China
Shuwen Xiao: Key Laboratory of Aquaculture Facilities Engineering, Ministry of Agriculture and Rural Affairs, 63 Chifeng Road, Shanghai 200092, China

IJERPH, 2022, vol. 19, issue 19, 1-15

Abstract: An integrated multi-trophic aquaculture system (IMTA) combined muti-trophic organism cultivation with ecological engineering facilities effectively improves energy utilization efficiency and reduces pollution emission, which promotes the development of the aquaculture industry. In this study, an Ecopath model was used to analyze the Pelteobagrus fulvidraco -integrated multi-trophic aquaculture system (FMRP). The results showed that the effective trophic level range of FMRP was low (1~2.566), and the energy throughput was mainly concentrated in trophic level I (65.39%). The utilization rate of commercial fish feed was high. Due to the lack of predators for detritus and primary producers ( Oryza sativa L. and hydrophyte), the energy throughput of detritus and the primary production were not fully utilized. The ascendency/total development capacity (A/TDC) and overhead/total development capacity (O/TDC) were 0.29 and 0.59, respectively, which indicated that the aquaculture system had high elasticity and strong anti-perturbation ability, but the stability could be substantially improved. The results of the carrying capacity assessment showed that the maximal single increments of Pelteobagrus fulvidraco fry and juvenile were 0.12 g/m 2 and 0.42 g/m 2 , respectively, and the maximal common increments of Pelteobagrus fulvidraco fry and juvenile were 0.10 g/m 2 and 0.10 g/m 2 , respectively, which indicated that there was insufficient space for increment. The study showed that the FMRP still needed to be improved in the aspects of polyculture species, energy consumption and stability. It would be necessary for the FMRP to perform further optimization and enhancement on the energy utilization efficiency, system stability and comprehensive benefits.

Keywords: Pelteobagrus fulvidraco; integrated multi-trophic aquaculture; Ecopath model; nutrient structure; energy throughput (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
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