Dr. Mary Opiyo

I am a Principal Research Scientist in Aquaculture and a African Food Fellow 2023. Currently, I am involved in research in alternative protein sources for sustainable production of fish feeds, the application of probiotics aquaculture and improvement of the quality of African Catfish and Nile tilapia seed through hybridization of different strains and selective breeding. I have 16 years of experience in aquaculture research and have published 16 books and book chapters, 66 peer-reviewed papers in SCI-indexed journals, and 35 conference proceedings. I have collaborated with various institutions in aquaculture research managed by international and regional organizations such as NORAD, LIDC, ICIPE, VLIR-UOS, BBSRC, STFC, KCSAP, WIOMSA, ASARECA, VicRes-IUCEA, Wageningen University & Research (WUR), EU-Horizon and KAPAP with funding from DANIDA, DfID, European Union (EU), SIDA, UK Research and Innovation (UKRI) and World Bank.  I have been the National Coordinator of the Seed quality assessment in the country for both private and public fish hatcheries where my responsibilities are monitoring and evaluating of the performance of the hatcheries, coordinating the development of Tilapia and Catfish seed standards and authentication of new hatcheries; which has led to the supply of seed to meet the demand of fish seed across the country. I am a member of the National technical team responsible for the development of the Manual of Standard Operating Procedure for Fish Inspection and Quality Assurance for Fish Business Operators in Kenya, East Africa Community (EAC) technical committee for fish seed standards and certification guidelines, Member of LVFO taskforce in Aquaculture Research and a member of the African Union-International Bureau of Animal Resources (AU-IBAR) Taskforce on African ornamental fisheries.  I have carried out 21 research projects including;- Climate smart aquaculture technologies; Using Black Soldier Fly Larvae as Sustainable Protein Source for Fish; Addressing livestock-derived antimicrobial resistance in the Nairobi river basin, Enhancing omega 3 fatty acids in farmed fish; Probiotics applications in aquaculture; Selective breeding of Nile tilapia; Strategic framework for Aquaculture Education in Kenya; Commercialization of fish feed production; Enhancing productivity and Competitiveness of Aquaculture; Fish Farming Enterprise Productivity Program; Aquaculture production through sustainable technologies and market linkages.  I have been a resource person in the training of fish farmers, Hatchery managers, processors, traders, students and government extension officers in Good aquaculture practices, Sanitary and phytosanitary requirements in Aquaculture, Ornamental fishery, Seed production and hatchery management, Aquaculture entrepreneurship, Aquaculture economics, Aquaculture nutrition, Fish health management and general aquaculture management.  I have previously served as a Research Assistant at CARE Kenya an international NGO dealing in smallholder livelihood projects.

Research Interests: Fish nutrition, Climate Smart Aquaculture technologies, Cage Aquaculture, Production and application quality and cost effective fish feeds,  Probiotics applications in aquaculture, Antibiotic resistance in farmed fish, Omega 3 fatty acids in fish, Aquaculture economics, Fish health management; Production of all male tilapia, Improved efficiency of integrated farming systems, Aquaculture production in cages in lake Victoria, Genetic improvement of farmed fish for quality seed production.

Publications:  Research gate link: https://www.researchgate.net/profile/Mary_Opiyo

         Google Scholar link: https://scholar.google.com/citations?user=rhnT9H0AAAAJ&hl=en 

LinkedIn:  https://www.linkedin.com/in/mary-opiyo-phd-05895a21/

Email:   mopiyo@kmfri.go.ke, marybede@gmail.com



KMFRI Kisumu Centre
Aquaculture (Fresh water systems)
Fish Health management, Fish nutrition, Freshwater Fish seed production and Hatchery Management

Fish nutrition, Fish Health management, Freshwater fish seed production and Hatchery Management, Climate Smart Aquaculture, Food systems

 mopiyo@kmfri.go.ke
marybede@gmail.com

2014 - 2020: PhD, Fisheries Science, Kenyatta University, Kenya

2007-2010: MSc. Fisheries and Aquatic Sciences (Aquaculture), Moi University, Kenya

2003-2007: BSc. Fisheries and Aquatic Sciences, Moi University (Kenya)

SCIENTIFIC PUBLICATIONS

  1. Mutai, I.J., Nyanswi, B., Omwenga, E.O., Apopo, A.A., Lweikiza, I.K., Mwangi, V.I., Mugo, M., Mwai, F., Opiyo, M.A.,Gichana, Z. and Opondo, J.N., Obiero J. A., Nyoike, T.W., Mwangi, J., Ochieng, A., Nyachieo A. (2025). Bacterial pathogens in fish and aquaculture systems in Kenya. Academia Biology, 3(4): 1-14. https://doi.org/10.20935/AcadBiol8049
  2. Magondu, E., Njogu, L., Ouko, K., Mboya, J.B., Muthoka, M., Yossa, R., Munguti, J., Opiyo, M.A.,Meenakshisundaram, M., Tanga, C.M. and Obiero, K. (2025). A PESTEL‐SWOT Matrix Analysis of Sustainable Aquafeed Sector: A Case of Kenya's Fish Feed Sector. Reviews in Aquaculture, 17(4), p.e70081. https://doi.org/10.1111/raq.70081
  3. Kyule, D. Munguti, J. Muthoka, M. Ogello, E. M. Abwao J. (2025). Historical Origin of Trout Farming in Kenya: Current Status, Challenges, and Future Prospects. Aquaculture Research, 8816761, 21 pages https://doi.org/10.1155/are/8816761
  4. Kwikiriza, G., Muthoka, M., Omara, T., Abaho, I., Tibihika, P.D., Curto, M., Opiyo, M.A.,Munguti, J., Abwao, J., Orina, P. and Meimberg, H. (2025), Nile tilapia (Oreochromis niloticus) Cage aquaculture in africa: potential threats to congeneric fish species and advances to detect escapes. Aquaculture Fish & Fisheries, 5: e70090. https://doi.org/10.1002/aff2.70090
  5. Munguti, J.M., Muthoka, M., Kyule, D N., Mboya, J., Obiero, K., Hamisi, A., Ogello, E., Opiyo M. A & Njonge, F. (2025). Unlocking aquaculture potential of arid and semi-arid lands in Kenya for food security and economic growth. Sustainable Aquatic Research 4(2). https://zenodo.org/records/15591980
  6. Kyule, D., Munguti, J., Muthoka, M., Opiyo, M., & Abwao, J. Maundu. A. (2025). A Review of fish value-added products in Kenya: Current status, challenges and areas for improvement.Sustainable Aquatic Research, 4(1), 116-142. https://zenodo.org/records/15255684
  7. Kagali, R. N., Opiyo, M. A.,Mbogo, K. O., & Ogila, K. O. (2025). Performance Efficiency of Selected Medium Culture and Raft Systems for Waste Removal in a Small‐Scale Aquaponics Production System. Aquaculture Research, 2025(1), 3668908. https://doi.org/10.1155/are/3668908
  8. Opiyo, M.A., Awuor, F. J., Awandu, H. Onsongo, K., Otieno, D., Lorna B. and Heffernan, C. (2024) Knowledge and perception regarding antimicrobial use and resistance in aquaculture along the Nairobi River basin. Animal Health Production and Hygiene,13 (2): 32 – 41. https://doi.org/10.53913/aduveterinary.1429482
  9. Opiyo, M.A., Mbogo, k., Abwao, J., Kyule, D., Amahwa C., Nyonje B.M., and Munguti, J. (2024). Fishmeal partial replacement using duckweed (Lemna minor) enhances growth performance and body composition of Nile tilapia (Oreochromis niloticus) L. Sustainable Aquatic Research, 3(3), 127-136. https://zenodo.org/records/14555064
  10. Opiyo, M.A., Mbogo, K., Orina, P. (2024). Potential of Freshwater Macrophytes for Aquafeed in Kenya. In: Gabriel, N.N., Abasubong, K.P., Erasmus, V.N., Kamble, M.T. (eds) Sustainable Feed Ingredients and Additives for Aquaculture Farming. Sustainability Sciences in Asia and Africa, pp. 29–42 Springer, Singapore. https://doi.org/10.1007/978-981-97-4279-0_2
  11. Opiyo, M., Mbogo, K., Obiero, K., Orina, P., Muendo, P (2023). Nutritional composition of duckweed (Lemna minor) cultured with inorganic fertilizer and organic manure in earthen ponds. Journal of Limnology and Freshwater Fisheries Research, 9(3), 123-129. https://doi.org/10.17216/limnofish.1152512
  12. Obiero K., Ogello E., Munguti, J., Mboya, J., Kyule D., Opiyo, M., Githukia, C., Ouko, K., Kembenya, E., Abwao, J., Matolla, G., Ani, J., Sambu, S., Cheserek, M. Ngeno, K., Meenakshisundaram, M., Khobondo, J., Tanga, C. and Yossa R. (2024). Profiling and prioritizing climate-smart aquaculture technologies, innovations and management practices in Kenya. Aquaculture Research8843677 https://doi.org/10.1155/2024/8843677
  13. Munguti, J., Mboya, J., Kirimi, J., Kyule, D., Iteba, J., Magondu, E., Obiero, K., Otachi, E., Thiakunu, F., Ouko, K., Opiyo, M. (2024). Fish diseases and health investment needs for the aquaculture sector in Kenya. Sustainable Aquatic Research, 3(2), 136-146.https://doi.org/10.5281/zenodo.13621525
  14. Kyule D., Abwao, J., Nairuti, R. Iteba, JO., OpiyoM., Munguti J. (2024) Effect of replacing Black soldier fly (Hermetia illucens) larvae meal with fish meal in diets for African catfish (Clarias gariepinus) reared in earthen ponds, Kenya Aquatica Journal, 9, (1) 35-44.
  15. Munguti, J.M., Mboya, J.B., Iteba, J.O., Kirimi, J.G., Obiero, K.O., Kyule, D.N., Opiyo, M.A., Njonge, F.K., (2024) Status and prospects of the ornamental fish industry in Kenya. Aquaculture, Fish and Fisheries, 4, e172. https://doi.org/10.1002/aff2.172
  16. Ngarari, M.M., Hinzano, S.M., Opiyo, M.A., Rugendo, D.G., Midumbi, D.O., Okalo, F.A., Nyonje. B.M, Ngugi, C.C.and  Gatune, CW. (2024) Salinity tolerance, growth and survival of three Artemia franciscana (Kellogg, 1906) populations under laboratory conditions. Aquaculture, Fish and Fisheries, 4,(3) e166. https://doi.org/10.1002/aff2.166
  17. Kals, J. Opiyo, M.A,Rurangwa E., Soma, K. Ndambi, O.A and Vernooij, A. (2024). Use of black soldier fly larvae and freshwater shrimp as a supplementary diet for Nile tilapia cultured in a smallholder fish farm – A case study in Busia County, Kenya. Frontiers in Sustainable Food Systems, 8, 1298551 https://doi.org/10.3389/fsufs.2024.1298551
  18. Soma, K., Kals, J., Opiyo, M.A.,Ndambi, A., García-Cubero, R., Barbosa, M.J., Rurangwa, E. and Vernooij, A., (2024). Towards sustainable food systems: Can spirulina (Arthrospira platensis) become a sustainable source of protein to enhance the nutritional benefits of cultured Nile tilapia (Oreochromis niloticus)? Frontiers in Sustainable Food Systems, 8, 1283150. https://doi.org/10.3389/fsufs.2024.1283150
  19. Kaminski, A. M., Pounds, A. M., McAdam, B., Bostock, J., Opiyo, M. A., & Little, D. C. (2024). Growing smaller fish for inclusive markets? Increasing stocking density and shortening the production cycle of Nile tilapia in cages on Lake Victoria. Aquaculture, 581, 740319. https://doi.org/10.1016/j.aquaculture.2023.740319
  20. Njue, J. N., Ngugi, C. C., Muchiri, M., & Opiyo, M. A.(2024). Spawning interactions between hatchery-reared and wild naturalized rainbow trout (Oncorhynchus mykiss, Walbaum, 1792) in high-altitude tropical streams, Kenya. Aquaculture, Fish and Fisheries, 4, 1–13. https://doi.org/https://doi.org/10.1002/aff2.141
  21. Munguti, J., Wekesa, F., Osuga, I., Kariuki, M., Yossa, R., Mungai, D., Kyule, D., Abwao, J., Opiyo, M., Obiero, K., Outa, N., Ogello, E., Iteba, J., Kirimi, J. G., Maundu, A., Liti, D., & Tanga, C. M. (2024). Utilization of Black Soldier Fly (Hermetia illucens) Larvae as a Potential Substitute for Fish Meal in the Production of Nile Tilapia (Oreochromis niloticus). Sustainable Agriculture Research, 13(1), 40-49. https://doi.org/10.5539/sar.v13n1p40
  22. Nzeve, J., Muendo, P., Opiyo, M., Odede, R., & Leschen, W. (2024). Fish health knowledge, management practices and prophylactic health products usage in aquaculture systems in Kenya. Journal of Applied Aquaculture, 36:1, 215-227https://doi.org/10.1080/10454438.2022.2155500
  23. Opiyo, M., Mbogo, K., Obiero, K., Orina, P., Muendo, P (2023). Nutritional composition of duckweed (Lemna minor) cultured with inorganic fertilizer and organic manure in earthen ponds. Journal of Limnology and Freshwater Fisheries Research, 9(3), 123-129. https://doi.org/10.17216/limnofish.1152512
  24. Hinzano, S.M., Ngarari, M.M., Opiyo, M., Okalo, F., Mindraa, B.N., Midumbi, D. and Gitari, M. (2023). Effects of feeding different densities of Artemia nauplii on the growth and survival of larvae of the hairy river prawn, Macrobrachium rude(Heller, 1862). Ege Journal of Fisheries and Aquatic Sciences, 40(4), 259-265. https://doi.org/10.12714/egejfas.40.4.04
  25. Abwao, J., Opiyo, M. A., Kyule, D., Kendi, J., Mungai, D., & Ojuok, T. (2023). Feasibility of hydropower reservoirs for fish cage Aquaculture: A strategy for fish farming in drought risk areas in Kenya. Marine and Life Sciences, 5(1), 16-25. https://doi.org/10.51756/marlife.1221254
  26. Opiyo, M.A., Nairuti, R.N., Ngugi, C.C., Holeh, G.M. (2023). Black Soldier Fly (Hermetia illucens) Larvae Meal as a Sustainable Protein Source for Fish Feed Production in Kenya. In: Gabriel, N.N., Omoregie, E., Abasubong, K.P. (eds) Emerging Sustainable Aquaculture Innovations in Africa. Sustainability Sciences in Asia and Africa. Springer, Singapore. pp 89–101. https://doi.org/10.1007/978-981-19-7451-9_3
  27. Wainaina, M., Opiyo, M.A., Charo-Karisa, H., Orina, P., Nyonje, B. (2023). On-Farm Assessment of Different Fingerling Sizes of Nile Tilapia (Oreochromis niloticus) on Growth Performance, Survival and Yield. Aquaculture Studies, 23(2), AQUAST900. http://doi.org/10.4194/AQUAST900
  28. Abwao, J., Jung’a, J., Barasa, J.E., Kyule, D., Opiyo, M.,Awuor, J.F., Ogello, E., Munguti J.M. &.Keya, G. A (2023). Selective breeding of Nile tilapia, Oreochromis niloticus: A strategy for increased genetic diversity and sustainable development of aquaculture in Kenya, Journal of Applied Aquaculture, 35:2, 237-256 https://doi.org/10.1080/10454438.2021.1958728 
  29. Opiyo, M. A., Muendo, P., Mbogo, K., Ngugi, C. C., Charo-Karisa, H., Orina, P., Leschen, W., Glencross, B.D.  Tocher, D. R. (2022). Inclusion of duckweed (Lemna minor) in the diet improves flesh omega-3 long-chain polyunsaturated fatty acid profiles but not the growth of farmed Nile tilapia (Oreochromis niloticus). Animal Feed Science and Technology 292, 115442.https://doi.org/10.1016/j.anifeedsci.2022.115442
  30. Hinzano, S. M., Okalo, F. A., Ngarari, M. M., Opiyo, M. A.,Ogello, E. O., Fulanda, A. M., Odiwour, D.O.& Nyonje, B. (2022). Phytoplankton distribution along a salinity gradient in two Kenyan saltworks (Tana and Kurawa). Western Indian Ocean Journal of Marine Science, 21(1), 113-124. https://doi.org/4314/wiojms.v21i1.9
  31. Munguti, J.M, Nairuti, R., Iteba, J.O., Obiero, K.O., Kyule, D., Opiyo, M.A, Abwao, J., Gitonga, J.K, Outa N.,  Githukia C.M., Mavindu, M. and Ogello, E.O. (2022). Nile tilapia (Oreochromis niloticusLinnaeus, 1758) culture in Kenya: Emerging production technologies and socio-economic impacts on local livelihoods. Aquaculture, Fish and Fisheries, 2 (4), 265–276. https://doi.org/10.1002/aff2.58
  32. Holeh, G.M., Opiyo, M. A.,Brown, C. L., Sumbule, E., Gatagwu, J., Oje, E. O and Munyi, F. (2022) Effect of different waste substrates on the growth, development and proximate composition of black soldier fly (Hermetia illucens) larvae. Livestock Research for Rural Development. Volume 34, Article #57. http://www.lrrd.org/lrrd34/7/3457hole.html
  33. Shati, S.M., Opiyo, M.A.,Nairuti, R.N., Shoko, A.P., Munyi, F., Ogello, E.O. (2022). Black soldier fly (Hermatia illucens) larvae meal improves growth performance, feed utilization, amino acids profile, and economic benefits of Nile tilapia (Oreochromis niloticus, L.). Aquatic Research, 5(3), 238-249. https://doi.org/10.3153/AR22023
  34. Limbu, S. M., Shoko, A. P., Ulotu, E. E. Luvanga, S. A., Munyi F. M., John, J.O and. Opiyo M. A(2022) Black soldier fly (Hermetia illucens, L.) larvae meal improves growth performance, feed efficiency and economic returns of Nile tilapia (Oreochromis niloticus, L.) fry. Aquaculture, Fish and Fisheries, 2(3)167-178 https://doi.org/10.1002/aff2.48
  35. Chepkirui, M., Orina, P.S., Opiyo, M., Muendo, P., Mbogo, K., Omondi, R. (2022) Growth performance of Nile tilapia (Oreochromis niloticus) fingerlings fed with water spinach (Ipomoea aquatica) diets. Annals of Marine Science 6(1): 001-006.  https://dx.doi.org/10.17352/ams.000026
  36. Nairuti, R.N., Musyoka, S.N., Yegon, M.J., & Opiyo, M.A. (2022). Utilization of Black Soldier Fly (Hermetia illucens Linnaeus) Larvae as a Protein Source for Fish Feed – a Review. Aquaculture Studies, 22, AQUAST697. http://doi.org/10.4194/AQUAST697
  37. Chepkirui, M., Orina, P.S., Opiyo,, Muendo, P., Mbogo, K., Omondi, R. (2021). Fatty acids composition of Nile tilapia (Oreochromis niloticus) fingerlings fed diets containing different levels of water spinach (Ipomoea aquatica), Journal of Agriculture and Food Research, 5, September 2021,100156. https://doi.org/10.1016/j.jafr.2021.100156.
  38. Awuor, F.J., Opiyo, M.A., Obiero, K.O., Munguti, J.M., Abwao,, Nyonje, B.M., Nevejan, N. and Van Stappen, G. (2021). Aquaculture Extension Service in Kenya: Farmers and Extension Officers, Journal of Agricultural Extension and Rural Development, ISSN: 2141-2170 13(1) 14-22. https://academicjournals.org/journal/JAERD/article-full-text-pdf/56AB84765877
  39. Kyule, D.N., Fonda, J.A., Ochiewo, J., Munguti, M.J., Obiero, K.O., Ogello, E.O., Opiyo, M.A., Abwao, J. and Kendi, J. (2020) Perceived consumer preferences of fisheries products retailed in Kenyan markets Bioscience Research, 17(4): 2486-2496.https://www.isisn.org/BR17(4)2020/2486-2496-17(4)2020BR20-366.pdf
  40. Opiyo, M.A., Obiero, K.O., Abwao, J., Awuor, F.J., Kyule, D. and Munguti, J. (2020). Comparative growth performance of genetically male, sex-reversed and mixed-sex Nile tilapia (Oreochromis niloticus) reared in earthen ponds in Sagana, Kenya. Aquaculture Studies, 21(1): 23-30http://www.aquast.org/uploads/pdf_507.pdf
  41. Holeh, G.M., Appanteng, P.,Opiyo, M.A., Park, J. and  Brown, C.L. (2020). Effects of intermittent feeding regimes on growth performance and economic benefits of Amur catfish (Silurus asotus). Aquatic Research, 3(3), 167-176.  https://doi.org/10.3153/AR20015
  42. Opiyo, M. A., Jumbe J., Ngugi C.C., Charo-Karisa H. (2019). Different levels of probiotics affect growth, survival and body composition of Nile tilapia (Oreochromis niloticus) cultured in low input ponds.Scientific African 4: July 2019, e00103 https://doi.org/10.1016/j.sciaf.2019.e00103
  43. Opiyo, M. A.,Jumbe, J., Ngugi, C.C. and Charo-Karisa, H. (2019). Dietary administration of probiotics modulates non-specific immunity and gut microbiota of Nile tilapia (Oreochromis niloticus) cultured in low input ponds. International Journal of Veterinary Science and Medicine 7 (1): 1-9 https://doi.org/10.1080/23144599.2019.1624299
  44. Fonda, J. A., Obiero, K., Munguti, J., Oginga, J.O., Kyule, D., Opiyo, M. A.,Oduor-Odote, P., Yongo, E., Owiti, H. and Ochiewo, J. (2019). Market linkages and distribution channels of cultured, captured and imported fish in Kenya. Aquaculture Studies, Volume 19 Issue 1, http://doi.org/10.4194/2618-6381-v19_1_06
  45. Opiyo, M.A.,Marijani, E., Muendo, P., Odede, R., Leschen, W. and Charo-Karisa, H. (2018). A review of aquaculture production and health management practices of farmed fish in Kenya. International Journal of Veterinary Science and Medicine 6: 141-148 https://doi.org/10.1016/j.ijvsm.2018.07.001
  46. Orina, P.S., Charo-Karisa, H., Munguti, J.M., Boera, P., Abwao, J., Kyule, D., Opiyo M. A.,Marcial H. and Rasowo,  O. (2018). ) A Comparative Study of Labeo victorianus (Bouelenger, 1901) and Oreochromis niloticus (Linnaeus, 1758) in Polyculture Systems. Lakes & Reservoirs: Research and Management 23 (1): 56-62. https://doi.org/10.1111/lre.12202
  47. Nyonje, B.M., Opiyo, M. A., Orina, P. S., Abwao, J., Wainaina, M. and Charo-Karisa, H. (2018): Current status of freshwater fish hatcheries, broodstock management and fingerling production in the Kenya aquaculture sector. Livestock Research for Rural Development. Volume 30, Article #6. Retrieved January 9, 2018, from  http://www.lrrd.org/lrrd30/1/mary30006.html
  48. Opiyo, M.A.Orina, P. and Charo-Karisa, H. (2017) Fecundity, Growth Parameters and Survival Rate of Three African Catfish (Clarias gariepinus) Strains under Hatchery Conditions. Journal of Aquaculture Engineering and Fisheries Research 3(2): 75-81. E-ISSN 2149-0236. https://doi.org/10.3153/JAEFR17010
  49. Opiyo, M.A.,Orina, P., Kyule, D., Munguti, J. M. Nyonje, B.M. and Charo-Karisa, H. (2016) Growth performance and survival of three African Catfish (Clarias gariepinus, Burchell 1882) strains reared in hapas in Kenya. Bulletin of Animal Health and Production in Africa Special Edition 2016 - Fisheries and Aquaculture Resources 64 (2): 31 – 39.  ISSN 0378 – 9721. au-ibar.org/component/jdownloads/finish/14/2969
  50. Kyule, D. Opiyo, M.A.Ogello E., Obiero, K. Maranga,  B., Orina, P., Charo-Karisa,  H. and Munguti, J. (2016). Determination of Fish Value Added Product- Preferences Among the Residents of Wote Town, Makueni County, Kenya . Bulletin of Animal Health and Production in Africa Special Edition 2016 - Fisheries and Aquaculture Resources 64 (2): 69 – 78.  ISSN 0378 – 9721. au-ibar.org/component/jdownloads/finish/14/2969
  51. Opiyo, M. A.,Mugo, J. B., Kyule, D. and Okemwa, G. (2016). Overview of Ornamental Fish Production in Kenya: Current status, Opportunities and Challenges. Bulletin of Animal Health and Production in Africa Special Edition 2016 - Fisheries and Aquaculture Resources, 64 (2): 193 – 200.  ISSN 0378 – 9721. au-ibar.org/component/jdownloads/finish/14/2969
  52. Oluoch-Otiego, J., Oyoo-Okoth, E., Kipkorir, K.G.K.,.Chemoiwa., E.J., Ngugi, C.C., Simiyu, G., Omutange, E.S., Ngure, V.  and  Opiyo M.A. (2016).PCBs in fish and their cestode parasites in Lake Victoria. Environmental Monitoring and Assessment,188:1-11. https://doi.org/10.1007/s10661-016-5483-0.
  53. Githukia, C. M., Kembenya, E. M. and Opiyo, M. A.(2016.)  Anaesthetic Effects of Sodium Bicarbonate at Different Concentrations on African catfish (Clarias gariepinus) Juveniles. Journal of Aquaculture Engineering and Fisheries Research. 2(3): 151-158. ISSN 2149-0236. https://doi.org/10.3153/JAEFR16017
  54. Orina, P. S, Rasowo, J. O., Opiyo, M. A.,Boera, P.,  Abwao, J. Charo-Karisa,  H. (2014). Optimization of Seed and Broodstock Transport Densities for Improved Survival of survival of African carp (Labeo victorianus, Boulenger, 1901). International Journal of  Chemical Studies, 2(2): 34-42. ISSN: 2321- http://www.chemijournal.com/archives/2014/vol2issue2/PartA/4.1.pdf
  55. Opiyo, M.A. Munguti, J. M. Ogello, E.O., Charo-Karisa, H. (2014). Growth response, survival and profitability of Nile tilapia (Oreochromis niloticus) fed at different feeding frequencies in fertilized earthen ponds. International Journal of Science and Research(IJSR) 3 (9): 893-898. https://www.ijsr.net/archive/v3i9/U0VQMTQyMjE=.pdf
  56. Opiyo, M.A.,Ngugi, C. C. and Rasowo, J. (2014). Combined effects of stocking density and background colour on growth performance and survival of Nile tilapia (Oreochromis niloticus, L.) fry reared in aquaria. Journal of FisheriesScience.com 8(3): 228-237. https://doi.org/10.3153/jfscom.201429
  57. Munguti, J.M., Musa, S., Orina, P.S., Kyule, D.N., Opiyo, M. A.Charo-Karisa, H. and Ogello, E.O. (2014). An overview of current status of Kenyan fish feed industry and feed management practices, challenges and opportunities. International Journal of Fisheries and Aquatic Studies 1(6): 128-137. ISSN: 2347-5129. http://www.fisheriesjournal.com/vol1issue6/Pdf/145.1.pdf
  58. Orina P.S., MungutiM., Opiyo, M.A., Charo-Karisa, H. (2014). Optimization of Seed and Broodstock Transport Densities for Improved Survival of Cultured Nile Tilapia (Oreochromis niloticus, L. 1758). International Journal of Fisheries and Aquatic Studies 2014; 1(5): 157-161. ISSN: 2347-5129. www.fisheriesjournal.com/archives/2014/vol1issue5/PartC/116.pdf
  59. Kyule, D., Opiyo, M.A., Yongo,  E., Obiero, K., Munguti J. and Charo-Karisa H. (2014). Fish product development and market trials of fish and fish products in Kenya: a case study of Kirinyaga and Meru Counties.  Livestock Research for Rural Development26 (6) Retrieved June 25, 2014, from http://www.lrrd.org/lrrd26/6/kyul26108.htm
  60. Obiero, K., Opiyo, M.A., Munguti, M.J., Orina, P.S., Kyule, D., Yongo, E., Githukia, C.M. and Charo-Karisa, H. (2014). Consumer preference and marketing of farmed Nile Tilapia (Oreochromis niloticus) and African Catfish (Clarias gariepinus) in Kenya: Case Study of Kirinyaga and Vihiga Counties. International Journal of Fisheries and Aquatic studies1(5): 67-76. ISSN: 2347-5129. http://www.fisheriesjournal.com/vol1issue5/pdf/79.1.pdf
  61. Opiyo M.A., Githukia, C.M., Munguti J.M., and Charo-Karisa, H. (2014) Growth performance, carcass composition and profitability of Nile tilapia (Oreochromis niloticus ) fed commercial and on-farm formulated fish feed in earthen ponds. International Journal of Fisheries and Aquatic Studies, 1(5): 12-17. ISSN: 2347-5129.http://www.fisheriesjournal.com/vol1issue5/pdf/91.1.pdf
  62. Charo-Karisa, H., Opiyo, M.A., Munguti, J.M., Marijani, E. and Nzayisenga, L. (2013). Cost benefits analysis and growth effects of pelleted and unpelleted on-farm feeds on African catfish (Clarias gariepinus Burchell, 1822) in earthen ponds. Journal of Food, Agriculture, Nutrition and Development (AJFAND).Volume 13 No. 4: 8019-8033.September 2013.
  63. Opiyo M.A., Charo-Karisa, H. and Ogello, E.O. (2013). Effectiveness of Sodium Bicarbonate as an Anaesthetic for different sizes of Nile tilapia (Oreochromis niloticus, 1758) Juveniles. International Journal of Aquatic Science (IJAS),Vol 4 No.2 14-22. ISSN:  2008-8019. http://www.journal-aquaticscience.com/article_73502.html
  64. Mugo-Bundi, J., Oyoo-Okoth, E., Ngugi C.C., Manguya-Lusega, D., Chepkirui-Boit, V., Opiyo, M.A(2013). Utilization of Caridina nilotica, (Roux) meal as a protein source in feeds for Nile tilapia (Oreochromis niloticus). Aquaculture Research 46 (2): 346-357. https://doi.org/10.1111/are.12181
  65. Ogello, E., Omondi, R., Opiyo, M.A., Charo-Karisa, H., Munguti, J.  and Aura, C.M., (2012). Survival and avoidance response of the freshwater gastropod Melanoides tuberculatus(Muller) to different concentrations of tobacco waste. Aquaculture Research 43:1571-1576. https://doi.org/10.1111/j.1365-2109.2011.02962.x
  66. Munguti J, Charo-Karisa H, Opiyo M.A, Ogello E.O, Marijani E, Nzayisenga, L and D. Liti (2012). Nutritive value and availability of commonly used feed ingredients for farmed Nile tilapia (Oreochromis niloticus L.) and African catfish (Clarias gariepinus, Burchell) in Kenya, Rwanda and Tanzania. African Journal of Food, Agriculture, Nutrition and Development (AJFAND).Volume 12 No. 3 May 2012. ISSN NO 16845374. https://www.ajol.info/index.php/ajfand/article/view/77095

BOOKS AND BOOK CHAPTERS

  1. Nyonje, B., Nangulu, A., Van Stappen, G., Obiero, K., Opiyo,A., Awuor, J.F., Pynoo, B., Kisaka, L., Nevejan, N., Ngiri, J., Maina, J., and Ogello, E. (2021). Policy Framework for Aquaculture Education in Kenya, KMFRI, Kenya. 21 pp.
  2. Munguti J., Obiero, K., Orina, P., Mirera D., Kyule D., Mwaluma J., Opiyo M., Musa S., Ochiewo J., Njiru, J., Ogello, E. and Hagiwara. A. (Eds) (2021). State of Aquaculture Report 2021: Towards Nutrition Sensitive Fish Food Systems. Kenya Marine and Fisheries Research Institute, Mombasa, Kenya 190 pp.
  3. Orina, P., Kembenya, E., Opiyo, M.A.,Wainaina, M., Ondiba, R., Abwao, J., Nyabeta, J., and Mwaluma, J. (2021). Fish Seed Sector: Genetic Breeding and Reproduction Technologies. In: Munguti et al., (Eds). State of Aquaculture in Kenya 2020: Towards Nutrition -Sensitive Fish Food Systems; Chapter 5: Pages 89–102. Kenya Marine and Fisheries Research Institute, Mombasa, Kenya
  4. Opiyo, M.A.,Mziri, V., Musa, S., Kyule, D., Hinzano, S., Wainaina, M., Magondu, E., Werimo, K. and Ombwa, V. (2021). Fish disease management and biosecurity systems. In: Munguti et al., (Eds). State of Aquaculture in Kenya 2021: Towards Nutrition -Sensitive Fish Food Systems; Chapter 7: Pages 113–142. Kenya Marine and Fisheries Research Institute, Mombasa, Kenya
  5. Mirera, D., Nyonje, B., Opiyo, M.A,Obiero K., Awuor, FJ., Holeh, G., Kendi J. and  Okechi, J. (2021). Aquaculture Research and Training in Kenya. In: Munguti et al., (Eds). State of Aquaculture in Kenya 2020: Towards Nutrition -Sensitive Fish Food Systems; Chapter 8: Pages 143–152. Kenya Marine and Fisheries Research Institute, Mombasa, Kenya
  6. Munguti, J.M., Obiero K., Kyule D, Orina, P S, Githukia C.M, Opiyo M.A,Fonda J.A, Elijah E, Ondiba R., Abwao J, Musa S, and Njiru J. (2019) Training of Trainers (ToT) manual for aquaculture value chain, Master Trainers’ Manual, Kenya Climate Smart Agriculture Project (KCSAP) Secretariat, KALRO Headquarters, Nairobi.
  7. Musa, S., Opiyo, M.A.,Obiero, K.O., Ogello, E.O., Githukia, C.M., Ombwa, V., Kembenya, E., Boera, P., Okechi, J. (2017). Status of Freshwater Aquaculture in Kenya. In: Munguti et al. (eds.), State of Aquaculture in Kenya, Chapter 2, pp 10-24, Laxpress Services, Nairobi, Kenya.
  8. Orina, P.S.  Kyule, D.,  Opiyo, M.A., Awuor, F. J. and Munguti J. M. (2017) Post Harvest Management, Value Addition and Marketing In: Munguti et al. (eds.), State of Aquaculture in Kenya, Chapter 5, pp 49-53, Laxpress Services, Nairobi, Kenya.
  9. Opiyo, M.A., Charo-Karisa, H., Obiero, K., Munguti, J.M., Orina, P.S., Ogello, E.O., Nyoro, J., Kyule, D.N., Nyonje, B. and Omollo, B.O. (2017).  Overview of Good Aquaculture Practices in Kenya. Kenya Marine and Fisheries Research Institute (KMFRI), 34pp.
  10. Opiyo, A., Charo-Karisa, H., Nyonje, B., Omolo, B., Orina, P., Wainaina, M., Obiero, K., Munguti, J. (2017). Good Aquaculture Practices in Seed Production in Kenya: Volume 1. Tilapia and Catfish. Kenya Literature Bureau, Nairobi, Kenya. 60pp.
  11. Kyule-Muendo, D., Munguti, J.M., Opiyo, M.A., Obiero, O., Githukia, C.M., Orina, P.S., Njiru, J.M., Charo-Karisa, H. (2017). Fish Recipe Book, Volume 1. Kenya Literature Bureau, Nairobi, Kenya. 45pp.
  12. Obungu L., Mungai D., Nyandat, B. Opiyo, M.A.(2016).  Fish farmers Training Manual: Sanitary and Phytosanitary Requirements and Technical Barriers to Trade, Government Printers, Nairobi.
  13. Obungu L., Mungai D., Nyandat, B. Opiyo, M.A.(2015).  Manual of Standard Operating Procedures for Fish Inspection and Quality Assurance for Fish Business operators in Kenya. Government Printers, Nairobi.
  14. Obungu L., Mungai D., Nyandat, B. Opiyo, M.A.(2015). Fish quality assurance guidelines for fish business operations in Kenya
  15. Charo-Karisa, H., Munguti, J., Ouma, H., Masai, M.D., Opiyo, M.A.Okechi J.K.  and Orina S. P. (2011). A fish farmer’s Manual: For beginners, Students and hatchery managers, KMFRI, River brooks Communication Network, Nairobi, 99pp

RESEARCH PROJECTS

 

Project title and Year

Amount

Role

1.

2024 – 2026: EU HORIZON,  INNOECOFOOD project

Eco-Innovative Technologies for Improved Nutrition, Sustainable Production and Marketing of Agro-ecological Food Products in Africa

EURO 444,000

(KES 75, 924,000)

Co-PI /Task leader

2.

2023 Feb – June 2024: WUR TN4 Transition network Food and Nutrition Security of Low-Income Groups in Rural-Urban Food Systems in the Global South. Spirulina production and utilization by smallholder farmers

EURO 29,700

(KES 3,861,000)

Co-PI  

3.

2022 Jan to Dec 2022: Effect of alternative feed ingredients on the performances of Nile tilapia in Kenya WUR TN4 Transition network. Co-investigator

EURO 4,782

(KES 2,080,000)

Co-PI  

4.

2021-2023: STFC PROJECT. Developing a data-driven communication platform for improving farmed fish distribution in Kenya

GBP (10,000)

KES 1,432,248.91

Principle Investigator

5.

2021- 2022: MASMA-WIOMSA PROJECT. Optimizing Artemia Production Technology for Sustainable Aquaculture Development (APTSAD), Food Security and Economic Growth for the East African Coastal Communities

USD 298,294

(KES 38,181,632)

Co-PI

 

6.

2020-2021: KENYA CLIMATE SMART AGRICULTURE PROJECT (KCSAP)-WORLD BANK. Use of Locally Available Aquatic Macrophytes as Sustainable Ingredients for Fish Feeds for Rural Aquaculture

KES 4,406,500

Principle Investigator

7.

2020-2021: GLOBAL CHALLENGE RESEARCH FUND, UK RESEARCH & INNOVATION Addressing Livestock-derived Antimicrobial pollution in the Nairobi River in Kenya.

GBP 19,210

(KES 2,497,300)

Co-PI

 

8.

2019-2021: CLIMATE SMART AGRICULTURAL PRODUCTIVITY PROJECT (CS-APP)-EU Leveraging on aquaculture technologies to enhance productivity, resilience and adaptation to climate change

KES 8,671,408

Co-PI

 

9.

2019-2021: BIOINNOVATE AFRICA PROGRAMME PHASE II. Using Black Soldier Fly Larvae as an environmentally sustainable source, of affordable protein for Chicken and Fish Feed Co-Principle Investigator

USD 666,656.

(KES 83,998,656)

Co-PI

10.

2017-2021: VLIR-UOS. Building a Strategic Framework for Aquaculture Education in Kenya Project Coordinator

EURO 299, 874  

(KES 35,185,636)

Co-PI/ Project Coordinator

 

11.

2016: VLIR-UOS. Short Training Initiative (STI): Solving the bottleneck: improved practices for larval production of freshwater fish in East Africa.

EURO 23,016

(KES 2,500,000) 

Co-PI/Project Coordinator

 

12.

2017-2019: Newton Fund Global Research Partnership (GRP) in Aquaculture. Evaluating Costs and Benefits of Prophylactic Health Products and Novel Alternatives on Smallholder Aquaculture Farmers in Asia and Africa (IMAQulate). 

GBP 100,000

(KES 13,400,000)

Co-PI

 

13.

2017-2019: Newton Fund Global Research Partnership (GRP) in Aquaculture. Development of alternative sustainable fish feeds to promote human health using novel non-conventional indigenous ingredients (SNIPH).

GBP 347,790

(KES 46,603,860)

Co-PI

 

14.

2017-2019: National Research Fund (NRF): Effects of probiotics on growth performance, immunity and flesh quality of pond cultured Nile tilapia (Oreochromis niloticus, L.) in Kenya 

KES 1,332,000

Principle Investigator

15.

2010-2014: World Bank -Kenya Agricultural Productivity and Agribusiness Project (KAPAP) Commercializing aquaculture production through sustainable technologies and market linkages). 

KES 30,000,000

Lead Seed systems

16.

2011-2013: ASARECA project.  Building Public-Private Sector Partnership to Enhance the Productivity and Competitiveness of Aquaculture in Eastern and Central Africa (ECA) region 

U$D 264,735.91)

(KES 27,532,535)

Co-PI/ Project Coordinator

17.

2009-2012: VicRes IUCEA SIDA project.  Commercializing production of fish feeds through value addition of locally available feed ingredients. Rwanda, Tanzania and Kenya)

KES 4,000,000

Researcher

18.

2009-2011: KMFRI – GoK Project. Selective Fish Breeding for Quality Seed to Enhance Aquaculture Production in Kenya.

KES 2,000,000

Researcher

19.

2008-2010: Aquaculture Collaborative Research Support Program CRSP/USAID - AquaFISH project.

KES 2,000,000

Researcher

 

MEMBERSHIP TO PROFESSIONAL BODIES

  • Member of the World Aquaculture Society (WAS)
  • Member of the Aquacultural Association of Kenya (AAK)
  • Member of the Aquaculture Network for Africa (ANAF)
  • Member of African Women in Science and Engineering (AWSE)
  • Member of the Research Network for Sustainable Marine Aquaculture in Africa (AfriMAQUA
  • Member of Mentoring neTwork for African Women in Academia (MTAWA)
  • Member of Sustainable Aquaculture Research Networks in Sub-Saharan Africa (SARNISSA)
  • Member of the Association of Women in Fisheries Blue Economy Kenya (AWFBEK)
  • Alumni of Moi University, Kenya
  • Alumni of Kenyatta University

 


Contact us

The Chief Executive Officer
Kenya Marine and Fisheries Research Institute
P.O. Box 81651 - 80100
Mombasa, KENYA

Tel:  +254 (20) 8021561 or 712003853
Email: director@kmfri.go.ke
URL: https://www.kmfri.go.ke
Report Corruption: cpc@kmfri.go.ke

Orders: orders@kmfri.go.ke

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