Oyster Culture Development as a Livelihood Diversification Strategy in Bonny Island, Rivers State

Aquaculture of indigenous oyster species in Nigeria's Niger Delta estuaries presents a viable livelihood diversification opportunity for coastal communities whose traditional fishing-based livelihoods have been degraded by oil pollution and declining wild fish stocks. This study examines the feasibility and development prospects of oyster (Crassostrea gasar) culture as a livelihood strategy for women's fishing cooperatives on Bonny Island, Rivers State, South South Nigeria. A socioeconomic baseline survey of 150 households characterises existing livelihood portfolios, income distribution, oyster harvesting knowledge, and attitudes towards aquaculture adoption. Technical feasibility is assessed through a six-month pilot oyster longline culture trial conducted in a selected creek site with monitoring of growth rates, survival, fouling pressure, and environmental conditions including salinity, temperature, dissolved oxygen, and turbidity. Market assessment surveys document demand, price structures, and supply chain characteristics for oysters in Port Harcourt and Bonny markets. Financial analysis projects cash flow, return on investment, and payback period for a cooperative-scale oyster production unit under optimistic, base case, and pessimistic scenarios. Water quality compliance with Food and Agriculture Organization shellfish aquaculture standards is evaluated to identify safe harvesting periods. Findings are expected to demonstrate technical feasibility with high growth rates (reaching market size in four months) but identify marketing and credit access as principal adoption barriers. Recommendations address cooperative financing models and quality certification schemes. Keywords: oyster aquaculture, livelihood diversification, Bonny Island, Crassostrea gasar, cooperative fisheries