Dr. Stephen Gyamfi

Lecturer


Dept: Fisheries, Aquaculture and Water Resources
Department of Fisheries and watershed Management, KNUST-Kumasi

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Research Areas/Interests


Publications

    1. Obirikorang, K. A., Monnie, A. O., Baah, D. Y., Sedohia, M., Akrokoh, J., Gyamfi, S., & Bediako, J. O. (2026). Determinants of critical thermal maximum (CTMax) in the Nile tilapia (Oreochromis niloticus): Effects of body mass, dissolved oxygen concentration, and thermal ramping rate. Journal of Thermal Biology, 141, 104581.

    2. Obirikorang, K. A., Sedohia, M., Akrokoh, J., Amoah, A., Gyamfi, S., & Bediako, J. O. (2026). Ontogenetic repeatability of air-breathing behaviour and social modulation of respiratory and antipredatory behaviours in the air-breathing teleost, Clarias gariepinus. Journal of Ethology, 1-13.

    3. Gyamfi, S., Bettey, C. M., Bediako, J. O., Amisah, S., & Obirikorang, K. A. (2026). Responses of air-breathing, anti-predator behaviour and swimming activity to long-term hypoxia acclimation in the African catfish Clarias gariepinus. Environmental Biology of Fishes, 109(2), 75.

    4. Appiah, H. K., Kusi, I. O., Obirikorang, K. A., Gyamfi, S., Adjei-Boateng, D., & Edziyie, R. E. (2026). Bioaccumulation of Heavy Metals in Finfish and Shellfish Samples From Tano River, Ghana: A Food Safety Issue. Aquaculture Research, 2026(1), 8285249.54. Gyamfi, S., Edziyie, R. E., Obirikorang, K. A., Adjei-Boateng, D., & Skov, P. V. (2024). Nile tilapia (Oreochromis niloticus) show high tolerance to acute ammonia exposure but lose metabolic scope during prolonged exposure at low concentration. Aquatic Toxicology, 271, 106932.

    5. Gyamfi, S., Edziyie, R. E., Obirikorang, K. A., Adjei-Boateng, D., & Skov, P. V. (2024). Nile tilapia (Oreochromis niloticus) show high tolerance to acute ammonia exposure but lose metabolic scope during prolonged exposure at low concentration. Aquatic Toxicology, 271, 106932.

    6.Gyamfi, S., Edziyie, R. E., Obirikorang, K. A., Adjei-Boateng, D., & Skov, P. V. (2022). Water quality dynamics in earthen ponds with and without fish. International Aquatic Research, 14(3), 169-180.

    7. Obirikorang, K. A., Gyamfi, S., Goode, M. E., Amisah, S., Edziyie, R. E., Quagrainie, K., ... & Frimpong, E. (2020). Effect of soybean meal diets on the growth performance, ammonia excretion rates, gut histology and feed cost of Nile tilapia (Oreochromis niloticus) fry. Aquaculture Research, 51(9), 3520-3532.


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