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Article Type

Research Article

Subject Area

Environmental Pollution

Corresponding Author

B.S. Awe

Corresponding Author ORCID

https://orcid.org/0000-0002-1771-3272

Abstract

Nigeria aims to diversify from carbon to blue economy. Target 7 of Goal 14 of the United Nations 2030 Agenda for Sustainable Development, the creation of the Federal Ministry of Marine and Blue Economy, and the passage of the National Policy on Marine and Blue Economy (2025 -2034) in May 2025 are the three frameworks driving this ambition. However, water pollution and changes in climate are central to harnessing the aquaculture and fisheries component of the blue economy. With increasing waste disposal in waterways and waterbodies and decreasing river water flow due to changes in climate, these have implications for disrupting the quality of the water systems. Among available water quality indicators, DO (dissolved oxygen) and pH (hydrogen ion activity) are crucial to the survival and growth of aquatic resources. Analysis of documentary data revealed that the DO and the pH levels of some Nigerian stream/river waters violated the tolerance limits for aquatic resources. Roughly 71.35 per cent (%) of the observed points fell below the adopted 7.5 milligrammes per litre (mg/L) minimum DO threshold, while 30.04 % had pH range outside 6.5 - 9.0 tolerance limit. Since both DO and pH are crucial to aquatic life, this implies that Nigeria’s ability to harness the aquaculture and fisheries component of the blue economy might be at risk. To reshape the situation will require technological, institutional, organisational, and behavioural measures.

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