Localized effects of offshore aquaculture on water quality in a tropical sea

MARINE POLLUTION BULLETIN

卷:171

Article

Dunne, Aislinn¹  Carvalho, Susana¹  Moran, Xose Anxelu G.^1,2  Calleja, Maria Ll³  Jones, Burton¹ 

[1] King Abdullah Univ Sci & Technol, Red Sea Res Ctr, Thuwal 239556900, Saudi Arabia

[2] CSIC, Ctr Oceanog Gijon Xixon IEO, Avda Principe Asturias 70 Bis, Gijon Xixon 33212, Spain

[3] Max Planck Inst Chem MPIC, Dept Climate Geochem, Hahn Meitner Weg 1, D-55128 Mainz, Germany

关键词: Aquaculture;    Oligotrophic;    Red Sea;    Water quality;    Tropical;   

DOI  :  10.1016/j.marpolbul.2021.112732

来源: Elsevier

【 摘 要 】

Aquaculture production has increased steadily in many tropical countries over the past few decades, although impact assessments have been frequently neglected. We investigated the impacts of an offshore barramundi fish farm on water quality in the southern-central Red Sea, a traditionally understudied tropical, oligotrophic, and semi-enclosed basin. Inorganic nutrients, particulate matter, chlorophyll -a, and heterotrophic bacteria were measured periodically over 8 months around the farm. Water down-current from the farm had, on average, more heterotrophic bacteria and chlorophyll -a than up-current (11% and 34% higher, respectively). Ratios of dissolved inorganic nitrogen:phosphorus down-current from the farm were lower than ratios up-current (mean 9.8 vs 16.0, respectively). Phosphate, inorganic nitrogen, and particulate matter showed patterns of enrichment associated with the farm after a fish feeding event. Strategies such as feed optimization and considering hydrodynamics in site selection may improve water quality for future fish farms in Saudi Arabia and other tropical countries.

【 授权许可】

Free