Aquaculture

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Dr. Chrisphine Nyamweya
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Dr. Chrisphine Nyamweya

Nyamweya is an ecosystem functioning and fish stock assessment expert. He has been working on aquatic ecosystems for over 10 years with long standing research experience covering diverse areas of freshwater and marine ecology. He has a PhD in Ecological Modelling from the University of Iceland. Additionally, he has international diplomas in: (i) Marine and Inland Waters, Resources, Monitoring and Assessment, (ii) Fisheries acoustics, (iii) Fishbase and Taxanomy and (iv) Designing research projects. He has vast management skills having undertaken a Senior Management Course at the Kenya School of Government.  He has special interest in population and community dynamics, ecosystem functioning and responses to climate and human induced changes, application of hydroacoustics to estimate fish biomass and distribution in both space and time, application of smart technologies in data collection and analysis, development of management decision support and evaluation tools. He has built Atlantis, ROMS and GADGET Models to simulate Lake Victoria Ecosystem functioning and management strategy evaluation. Nyamweya has also been involved in diverse applications of Ecopath ecosystem model.

He has been an investigator in at least more than 15 national, regional and international projects. Currently he is Investigator in a multinational project “Small Fish and Food Security (SmallFishFood): Towards better utilisation of fish resources for nutrition and food security in Africa”. Where he is developing software and tools for electronic catch and effort data collection. Dr. Nyamweya is a part of the consortium that is developing Integrated Fisheries Management Plans (IFMPs) for transboundary river basins in the IGAD region.  He has published more than 45 papers, 30 of them in SCI-indexed journals.

Research Network: Research Gate

KMFRI Kisumu
Freshwater Systems Research/Limonology
Ecological modeling
Ecosystem functioning, fish stock population dynamics, Management Strategy Evaluation (MSE), Modelling, GIS remote sensing, Artificial Intelligence (AI)
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cnyamweya@kmfri.co.ke
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  1. i) Peer-reviewed articles

Odoli, C., Owiti, H., Kobingi, N., Obiero, M., Ogari, Z., Mugo, J., Nyamweya, C., Aura, M.C. (2019). Post-harvest interventions in small-scale fisheries: A boon or a bane to food and nutritional security in Kenya? Journal of Food Security https://doi.org/10.1007/s12571-019-00950-x.

Gichuru, N., Nyamweya, C.S., Owili, M., Mboya, D., Wanyama, R., 2019. Poor management of Lake Victoria fisheries (Kenya); a threat to sustainable fish supplies. Nat. Faune 32, 38–43.

Nyaundi, J., Getabu, A., Kengara, F., Onchieku, J., Njiru, M., Kinaro, Z., Babu, J., Sitoki, L., Nyamweya, C., Osoro, E., 2019. Assessment of organochlorine pesticides ( OCPs ) contamination in relation to physico-chemical parameters in the Upper River Kuja Catchment , Kenya ( East Africa ). Int. J. Fish. Aquat. Stud. 7, 172–179.

Aura, C.M., Nyamweya, C.S., Njiru, J.M., Odoli, C., Musa, S., Ogari, Z., Abila, R., Okeyo, R., Oketch, R., 2019. Using fish landing sites and markets information towards quantification of the blue economy to enhance fisheries management. Fish. Manag. Ecol. 1–12.

Mwamburi, J., Yongo, E., Aura, M.C., Babu, M.J., Basweti, M.G., Gichuru, N.N., Guya, F., Nyaboke, H., Nyamweya, C., Nyaundi, K.J., Odoli, C.O., Ogwai, A.C., Okechi, J., Ombwa, V., Omwega, R., Ongore, C., Owili, M., Owiti, H., Wawiye, I.P., 2018. Biodiversity & Endangered Species Balancing Community needs and Resource Protection?: The Case of Lake Kanyaboli, Kenya. J. Biodivers. Endanger. Species 6, 1–12.

Ongore, C. O., Aura, C. M., Ogari, Z., Njiru, J. M., & Nyamweya, C. S. (2018). Spatial-temporal dynamics of water hyacinth, Eichhornia crassipes (Mart.), other macrophytes and their impact on fisheries in Lake Victoria, Kenya. Journal of Great Lakes Research. doi:10.1016/j.jglr.2018.10.001

Aura, C.M., Nyamweya, C.S., Njiru, J.M., Musa, S., Ogari, Z., May, L., Wakwabi, E., (2018). Exploring the demarcation requirements of fish breeding and nursery sites to balance the exploitation, management and conservation needs of Lake Victoria ecosystem. Fish. Manag. Ecol. 1–9.

Njiru, J., van der Knaap, M., Kundu, R., Nyamweya, C., (2018) Lake Victoria fisheries: Outlook and management. Lakes Reserv. Res. Manag. 23, 152–162.

Mangeni-Sande, R., Taabu-Munyaho, A., Ogutu-Ohwayo, R., Nkalubo, W., Natugonza, V., Nakiyende, H., Nyamweya, C.S., Muwanika, V.B., (2018) Spatial and temporal differences in life history parameters of Rastrineobola argentea (Pellegrin, 1904) in the Lake Victoria basin in relation to fishing intensity. Fish. Manag. Ecol. 1–7.

Aloo, P. A., Njiru, M. J., , Balirwa, J. S. and Nyamweya C. S. (2017)  Impacts of Nile Perch, Lates niloticus on the Ecology, Economy and Conservation of Lake Victoria, East Africa. Lakes and Reservoirs: Research and Management, 22: 1–14. DOI: 10.1111/lre.12192

Nyamweya, C., Sturludottir, E., Tomasson, E. A., Taabu-Munyaho, A., Njiru, M., & Stefansson, G. (2017) Prediction of Lake Victoria’s response to varied fishing regimes using the Atlantis ecosystem model. Fish Research, 194: 76-83, DOI: 10.1016/j.fishres.2017.05.014

Ogello, E. O., Kembenya, E. M., Githukia, C. M., Aera, C. N., Munguti, J. M., and Nyamweya, C. S. (2017) Substitution of fish meal with sunflower seed meal in diets for Nile tilapia (Oreochromis niloticus L.) reared in earthen ponds. Journal of applied aquaculture, At23:45 http://dx.doi.org/10.1080/10454438.2016.1275074

Kundu, R., Aura, C. M., Nyamweya, C., Agembe, S., Sitoki, L., Lung'ayia, H. B. O., Ongore, C., Ogari, Z. and Werimo, K. (2017), Changes in pollution indicators in Lake Victoria, Kenya and their implications for lake and catchment management. Lakes and Reservoirs: Research and Management, 22: 199–214. doi:10.1111/lre.1218

Nyamweya, C., Sturludottir, E., Tomasson, T., Fulton, E. A., Taabu-Munyaho, A., Njiru, M., & Stefansson, G. (2016). Exploring Lake Victoria ecosystem functioning using the Atlantis modeling framework. Environmental Modelling & Software, 86: 158–167. http://doi.org/10.1016/j.envsoft.2016.09.019

Nyamweya, C., Desjardins, C., Sigurdsson, S., Tomasson, T., Taabu-Munyaho, A., Sitoki, L., & Stefansson, G. (2016). Simulation of Lake Victoria Circulation Patterns Using the Regional Ocean Modeling System (ROMS). PLoS ONE, 11(3): e0151272. http://doi.org/10.1371/journal.pone.0151272

Kundu, R., Muchiri, M., Njiru, M., and Nyamweya, C. (2016) Effect of Social and Economic Drivers on Success of Small Scale Fish farming in Western Kenya. African Journal of Tropical Hydrobiology and Fisheries, 14: 29- 44

Omondi, R, Kembenya, E., Nyamweya, C. S., Ouma, H., Machua, S. K. and Ogari, Z. (2014). Recent limnological changes and their implication on fisheries in Lake Baringo, Kenya. Journal of Ecology and the Natural Environment. 6(5): 154-163

Taabu-Munyaho, A., Nyamweya, C. S., Sitoki, L., Kayanda, R., Everson, I., and Marteinsdóttir, G. (2014). Spatial temporal variation in the distribution and density of pelagic fish species in Lake Victoria, East Africa. Aquatic Ecosystem Health & Management, 17(1):52–61. http://dx.doi.org/10.1080/14634988.2014.876886

Ojwang, W., Ojuok, J. E., Nyamweya, C. S., Agembe, S., Owili, M., Yongo, E., and Wakwabi, E. O. (2014). The intriguing dynamics of Rastrineobola argentea fishery in the Kenyan waters of Lake Victoria. Aquatic Ecosystem Health & Management, 17 (1): 80–89. http://dx.doi.org/10.1080/14634988.2014.879036

Njiru, M., Van der Knaap, M., Taabu-Munyaho, A., Nyamweya, C. S., Kayanda, R., and Marshall, B. E. (2014). Management of Lake Victoria fishery: Are we looking for easy solutions? Aquatic Ecosystem Health & Management, 17 (1) 70-79. http://dx.doi.org/10.1080/14634988.2014.881220

Yongo, E. O., Morara, G., Ojuok, J. E., Nyamweya, C. S., Ojwang, W. O., Masai, M. and Wasike, C. (2013). Socio-economic Aspects of Fisheries Management in Lake Naivasha. African Journal of Tropical Hydrobiology & Fisheries. 13: 27-32

Nyamweya, C.S., Mlewa, C.M., Ngugi, C.C., et al. (2012) Aspects of the biology of Labeo cylindricus (Pisces: cyprinidae) in Lake Baringo, Kenya. Lakes & Reservoirs: Research & Management 17, 225–229.

Nyamweya, C.S., Mlewa, C.M., Ngugi, C.C. and Kaunda-arara, B. (2010a) Daily growth of young-of-the-year of the. African Zoology 45, 139–143.

Nyamweya, C.S., Mlewa, C.M., Ngugi, C.C. and Kaunda-Arara, B. (2010b) Validation of daily growth of African catfish Clarias gariepinus (Burchell 1822) young-of-the-year from Lake Baringo, Kenya. Lakes & Reservoirs: Research & Management 15, 341–345.

  1. ii) Books

 Aura, C. M., Musa, S., Odoli, C. O., Nyamweya, S. C., Njiru, J. M., Wanyama, R., (eds). 2017. A technical manual on the best management practices for cage fish farming in Lake Victoria, Kenya. Kenya Marine and Fisheries Research Institute, Kenya. ISBN: 978-9966-103.

Aura, M.C., Wanyama, Musa, S., Odoli, C., Nyamweya, C., Njiru, J.M. (Eds). 2017. Best Management Practices of Cage Culture in Lake Victoria, Kenya. Published by Zemma Media Services Ltd. 24pp.

iii) Book chapters

Njiru, M., Nyamweya, C.S., Gichuki, J., Muggide, R., Mkumbo, O. and Witte, F. (2011) Increase in Anoxia in Lake Victoria and Its Effects on the Fishery. intechopen.com, 99–128.

Njiru, M., Sitoki, L., Nyamweya, C.S., Jembe, T., Aura, C., Waithaka, E. and Masese, F. (2012) Habitat degradation and changes in Lake Victoria fisheries. In: Environmental Degradation: Causes, Issues and Management. NOVA Publishers, pp 1–34.

Nyamweya, C., Aura, C., Ongore, C., Werimo, K., Owili, M., Olilo, C., & Yongo, E. (2018). The State of Lake Victoria Fisheries, Kenya. In E. Kimani, C. Aura, & G. Okemwa (Eds.), The Status of Kenya Fisheries: Towards the sustainable use of renewable aquatic resources for economic development (pp. 90–97). Mombasa: Kenya Marine and Fisheries Research Institute.

Muli, J., Odoli, C., Aura, C., Nyakwama, R., Yongo, E., Werimo, K., & Nyamweya, C. (2018). The State of Lake Baringo Fisheries. In E. Kimani, C. Aura, & G. Okemwa (Eds.), The Status of Kenya Fisheries: Towards the sustainable use of renewable aquatic resources for economic development (pp. 111–116). Mombasa: Kenya Marine and Fisheries Research Institute.

Mugo, J., Keyombe, J., Yongo, E., Werimo, K., Mutie, A., Waithaka, E., … Nyamweya, C. (2018). The Lake Naivasha Fisheries. In E. Kimani, C. Aura, & G. Okemwa (Eds.), The Status of Kenya Fisheries: Towards the sustainable use of renewable aquatic resources for economic development (pp. 117–123). Mombasa: Kenya Marine and Fisheries Research Institute.

Malala, J., Keyombe, J., Aura, C., Nyamweya, C., Werimo, K., Owili, M., … Yongo, E. (2018). The State of Lake Turkana Fisheries. In E. Kimani, C. Aura, & G. Okemwa (Eds.), The Status of Kenya Fisheries: Towards the sustainable use of renewable aquatic resources for economic development (pp. 98–110). Mombasa: Kenya Marine and Fisheries Research Institute.

Gichuru, N., Nyamweya, C., Aura, C., & Ogari, Z. (2018). The Fisheries of Small Lakes, Rivers and Dams. In E. Kimani, C. Aura, & G. Okemwa (Eds.), The Status of Kenya Fisheries: Towards the sustainable use of renewable aquatic resources for economic development (pp. 124–129). Mombasa: Kenya Marine and Fisheries Research Institute.