Journal
MARINE POLLUTION BULLETIN
Volume 121, Issue 1-2, Pages 313-319Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2017.04.034
Keywords
Sansha Bay; Integrated multi-trophic aquaculture (IMTA); Gracilaria lemaneiformis; Fish cages; Bioremediation; Eutrophication
Funding
- Public Science and Technology Research Funds Projects of Ocean [201205009-5]
- Key Projects in the National Science & Technology Pillar Program [2012BAC07B03]
- Shanghai Universities First-class Disciplines Project [0707]
- Plateau Peak Disciplines Project of Shanghai Universities [0707]
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To reduce negative environmental impacts from human aquaculture activities, the red alga Gracilaria lemaneiformis was co-cultured with the fish Pseudosciaena crocea in an integrated multi-trophic aquaculture (IMTA) system for 35 d in Yantian Bay. The eutrophication index value decreased from 14.5 to 8.4 after seaweeds were co-cultured in cage farming areas, which indicated that the eutrophic water column in Yantian Bay could be mediated by IMTA. Total DIN and DIP of the tidal input and output were 9.23 kg, 0.19 kg and 11.08 kg, and 0.27 kg, respectively. Total 5.24 kg of dissolved N and 0.81 kg of dissolved P were released from IMTA system. These results indicate that G. lemaneiformis co-cultured in IMTA system could not completely remove all excess nutrients. In theory, at least 324.48 kg of seaweed seedlings would be required to balance excess nutrients generated from fish cages.
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