Investigation of a Farm-scale Multitrophic Recirculating Aquaculture System with the Addition of Rhodovulum sulfidophilum for Milkfish (Chanos chanos) Coastal Aquaculture

Chang, Bea‐Ven; Liao, Chien-Sen; Chang, Yin‐Cheng; Chao, Wei-Liang; Yeh, Shinn-Lih; Kuo, Dong-Lin; Yang, Chu‐Wen

doi:10.3390/su11071880

Cited by 24 publications

(20 citation statements)

References 31 publications

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“…Therefore, the addition of anoxygenic phototrophic bacteria to water changes the microbial community structure and improves the water quality. Anoxygenic phototrophic bacteria are also frequently used as beneficial bacteria for aquaculture [53,54]. Therefore, a decrease in anoxygenic phototrophic bacteria after the addition of MG is harmful for DOM recycling and water quality in small MCPs (Figure 7).…”

Section: Discussionmentioning

confidence: 99%

Effects of Malachite Green on the Microbiomes of Milkfish Culture Ponds

Yang¹,

Chang²,

Hsieh³

et al. 2021

Water

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Intensive fish farming through aquaculture is vulnerable to infectious diseases that can increase fish mortality and damage the productivity of aquaculture farms. To prevent infectious diseases, malachite green (MG) has been applied as a veterinary drug for various microbial infections in aquaculture settings worldwide. However, little is known regarding the consequences of MG and MG-degrading bacteria (MGDB) on microbial communities in milkfish culture ponds (MCPs). In this study, small MCPs were used as a model system to determine the effects of MG on the microbial communities in MCPs. The addition of MG led to cyanobacterial blooms in the small MCP. The addition of MGDB could not completely reverse the effects of MG on microbial communities. Cyanobacterial blooms were not prevented. Microbial communities analyzed by next generation sequencing revealed that cyanobacterial blooms may be due to increase of nitrogen cycle (including nitrogen fixation, nitrate reduction and anammox) associated microbial communities, which raised the levels of ammonium in the water of the small MCP. The communities of anoxygenic phototrophic bacteria (beneficial for aquaculture and aquatic ecosystems) decreased after the addition of MG. The results of this investigation provide valuable insights into the effects of MG in aquaculture and the difficulties of bioremediation for aquatic environments polluted by MG.

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Section: Discussionmentioning

confidence: 99%

Effects of Malachite Green on the Microbiomes of Milkfish Culture Ponds

Yang¹,

Chang²,

Hsieh³

et al. 2021

Water

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“…It was also shown that the integration of a recirculating water system (RAS) for fish production, with other crops as sea urchin and seaweed, was efficient to maintain water quality and to reduce the waste load to the environment. The association of these two aquaculture production systems, RAS and IMTA, is relatively new, but has several advantages, allowing a tight control and monitoring of water quality, as recently demonstrated by Chang et al (2019).…”

Section: Discussionmentioning

confidence: 99%

Integrated Multi-Trophic Aquaculture: A Laboratory and Hands-on Experimental Activity to Promote Environmental Sustainability Awareness and Value of Aquaculture Products

et al. 2020

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Aquaculture is among the industries growing at the fastest rate in the world. This industry has been recognized to play a critical role in food production for a continuously expanding world population. However, despite various technological innovations and improvements in production techniques, this sector is still associated with misperceptions and negative opinions hampering its implementation and wide consumption of its products. The integrated multi-trophic aquaculture (IMTA) concept was developed as a way to increase the sustainability of intensive aquaculture systems, using an ecosystem-based approach. In this study, following this sustainable aquaculture concept, a closed recirculation IMTA system, at laboratorial scale, was developed and tested with the simultaneous production of fish, sea urchin and seaweed for 70 days. Based on this proof of concept, a hands-on experimental activity was developed to teach and communicate recent scientific advances in environmental sustainability and value of aquaculture products to young students and the general public. This experimental activity was tested and evaluated with students (n = 60) of basic and high-school (secondary) learning cycles. A quantitative assessment was carried out through a short questionnaire provided to the students before and after the experimental activity. After the experimental activity, a qualitative assessment was also performed through questions expressed without preconceived categories or hypotheses. Results indicated that the overall frequency of students who consider the ocean to be "very important" and "extremely important" increased from 68 to 81% after performing the experimental activity. Moreover, the percentages of correct answers to the questions related to IMTA concepts also increased significantly after the experimental activity. In the discussion of the experimental activity results, the students stated that they appreciated the opportunity to develop a hands-on experimental activity, which allowed them to increase their knowledge and obtain information on aquaculture and the quality of its products.

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“…The integration of multiple species from different trophic levels in the same IMTA design allows to recover particulate and dissolved nutrients in the form of valuable biomass of these extra crops. This has been previously described in studies addressing the combined use of bivalves and seaweeds [14][15][16][17][18][19][20][21][22][23] , bivalves and microalgae 24 , bivalves and halophytes 25 , echinoderms and seaweeds 26 , polychaetes and seaweeds 27 and polychaetes and halophytes 11 . More than 50% of these studies were performed in the time-period between 2015 and 2020 evidencing that this is currently a hot-topic in aquaculture.…”

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confidence: 82%

Recovering wasted nutrients from shrimp farming through the combined culture of polychaetes and halophytes

Jerónimo

Lillebø

Cremades

et al. 2021

Sci Rep

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The bioremediation and biomass production of organic extractive organisms (polychaetes Arenicola marina, Hediste diversicolor and halophyte Salicornia ramosissima) was assessed in an integrated multi-trophic aquaculture (IMTA) framework. Culture trials were performed outdoors using the nutient rich effluent from a shrimp farm employing recirculated aquaculture systems. Similar bioremediation efficiencies were obtained in cultures using a single polyculture tank (1 T) or two trophic levels separated tanks (2 T; ≈ 0.3 and 0.6 m2 operational area, respectively), with a reduction of 74–87% for particulate organic matter (POM), 56–64% for dissolved inorganic nitrogen (DIN) and 60–65% for dissolved inorganic phosphorus (DIP). Hediste diversicolor adapted well to culture conditions, reaching densities up to 5.000 ind. m−2 (≈ 78–98 g m−2). Arenicola marina failed to cope with water temperature that exceeded the species thermal limits, displaying a survival < 10% (20 °C often pointed as the maximum thermal threshold for this species). Productivity of S. ramosissima with 1 T was about twice that obtained with 2 T (≈ 150–170 and ≈ 60–90 g FW m−2 edible aboveground biomass, respectively). The yellowish coloration of cultured plants was likely due to the chemical oxidation and rapid sand filtration pre-treatment applied to the brackish groundwater used in the aquaculture facility, that removed iron (and probably other essential elements). Overall, 1 T design combining H. diversicolor and S. ramosissima displayed the best bioremediation performance and biomass production, while also allowing reducing in half the operational area required to implement this IMTA framework.

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Investigation of a Farm-scale Multitrophic Recirculating Aquaculture System with the Addition of Rhodovulum sulfidophilum for Milkfish (Chanos chanos) Coastal Aquaculture

Cited by 24 publications

References 31 publications

Effects of Malachite Green on the Microbiomes of Milkfish Culture Ponds

Effects of Malachite Green on the Microbiomes of Milkfish Culture Ponds

Integrated Multi-Trophic Aquaculture: A Laboratory and Hands-on Experimental Activity to Promote Environmental Sustainability Awareness and Value of Aquaculture Products

Recovering wasted nutrients from shrimp farming through the combined culture of polychaetes and halophytes

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