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Sustainability 2017, 9(12), 2173; doi:10.3390/su9122173

Increased Production and Water Remediation by Land-Based Farm-Scale Sequentially Integrated Multi-Trophic Aquaculture Systems—An Example from Southern Taiwan

1
Mariculture Research Center, Fisheries Research Institute, The Council of Agriculture, 4 Haipu, Sangu Village, Cigu District, Tainan City 72453, Taiwan
2
Department of Biomedical Science and Environmental Biology, 100 Shih-Chuan 1st Road, Kaohsiung City 80708, Taiwan
3
Research Center for Environmental Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung City 80708, Taiwan
4
Department of Ecology and Environmental Resources, National University of Tainan, 33, Sec. 2, Shu-Lin St., Tainan City 70005, Taiwan
*
Author to whom correspondence should be addressed.
Received: 15 October 2017 / Revised: 16 November 2017 / Accepted: 23 November 2017 / Published: 25 November 2017
(This article belongs to the Section Sustainable Agriculture, Food and Wildlife)
View Full-Text   |   Download PDF [856 KB, uploaded 25 November 2017]   |  

Abstract

Wastewater effluent from aquaculture ponds can affect aquatic ecosystems. To mitigate this problem, we designed 2 sets (southern and northern) of land-based and farm-scale sequential integrated multi-trophic aquaculture (IMTA) systems in order to reduce water pollution and to diversify and optimize aquaculture products in coastal southern Taiwan. In each system, the 1st pond cultivated milkfish as the main aquaculture product, the 2nd pond cultivated Portuguese oysters as the product to reduce suspended particles, and the 3rd pond cultivated the seaweed Gracilaria sp. as feed and to absorb nutrients. Photosynthetic bacteria (PSB) were added to the southern system in order to reduce nutrients. The objective of this study was to evaluate and compare performance parameters of the compartments and the overall IMTA systems preliminarily. Our results showed that the southern system with the addition of PSB had lower PO4−3-P, slightly higher turbidity, and higher brown algal biomass than the northern system. In the southern system, PO4−3-P and cyanobacteria levels were lowest at the end of the seaweed pond. In the northern system, NO2-N and phytoplankton levels were lowest at the end of the seaweed pond. Turbidity was reduced in the oyster pond and further reduced in the Gracilaria pond in both systems. The high seaweed yield in the northern system indicated substantial nutrient absorption. Advantages and limitations in terms of water purification and aquaculture production of these IMTA systems are evaluated in the present paper. View Full-Text
Keywords: integrated multi-trophic aquaculture; water quality; milkfish; Portuguese oyster; Gracilaria integrated multi-trophic aquaculture; water quality; milkfish; Portuguese oyster; Gracilaria
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MDPI and ACS Style

Yeh, S.-L.; Dahms, H.-U.; Chiu, Y.-J.; Chang, S.-J.; Wang, Y.-K. Increased Production and Water Remediation by Land-Based Farm-Scale Sequentially Integrated Multi-Trophic Aquaculture Systems—An Example from Southern Taiwan. Sustainability 2017, 9, 2173.

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