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Staff Information
Senior Lecturer
Corporate Email
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Phone Number
Division / Faculty
Faculty of Science
Directorate / Dept
Biological Sciences

Dr. Elick Otachi is an expert in fish health both in capture fisheries and aquaculture. I have experience working with fish from Lakes Naivasha, Turkana, Victoria and Nakuru and from very many fish farms in Kenya




Awarding institution

PhD in Natural Sciences (Biologie)


University of Vienna, Austria

Title of PhD thesis


Otachi E.O. (2013). Parasites of fish and trace elements in Lakes Naivasha and Turkana, Kenya

MSc. Limnology


Egerton University, Kenya

Title of MSc. thesis


Otachi E.O. (2009). Studies on occurrence of protozoan and helminth parasites in Nile Tilapia (Oreochromis niloticus, L.) ponds from Central and Eastern provinces, Kenya. Egerton University, Kenya

BSc. Applied Aquatic Sciences


Egerton University, Kenya

  • Fish pathology and Parasitology
  • Fish quality assuarance
  • Trace element analysis

May 2019 up to date

Associate Dean, Faculty of Science

Nov-Dec 2016

Ag. COD, Biological Sciences Department

Nov-Dec 2015

Ag. COD, Biological Sciences Department

June 2015-to date

Senior Lecturer, Biological Sciences Department

June 2014 to March 2019

Examination Officer-Zoology

July 2011 to May 2014

Lecturer, Biological Sciences Department

August 2008- June 2011

Senior Technologist, Biological Sciences Department

  1. 2007-2009: Integrating BOMOSA cage fish farming system in reservoirs, ponds and temporary water bodies in Eastern Africa financed by European Union
  2. 2010-2014: Heavy metals in Lake Naivasha, Kenya: Water, Sediments, Fish and their parasites- financed by Austrian Development Cooperation
  3. 2020-2023: Validating and promoting improved fish strains and health management practices for climate smart aquaculture finance by KARLO-KCSAP, amount Kshs 4,424,500. On-going

     4. 2020- Up to date: Aquaculture Innovation Lab for Improved Food Production funded by USAID/BOWIE State University.

  • Fisheries
  • Aquaculture
  • Fish Health Management and Biosecurity
  • Blue economy
  • Climate Change
  1. Walter Essendi, Charles Muleke, Elick Otachi, Manfred Miheso, & Domitila Kyule (2021). Prevalence of zoonotic Cryptosporidium spp. isolates in Njoro Sub-County, Nakuru County, Kenya. African Journal of Infectious Diseases (AJID), 15(2), 3-9. v15n2.2
  2. Daniel Mwangi, Nzula Kitaka and Elick Otachi (2020). A Comparative Analysis of the Quantity and Quality of Oil Extracted from Five Commercially Important Freshwater Fish Species in Kenya. Journal of Aquatic Food Product Technology Volume 30, 2021 - Issue 1
  3. Adamba, S.W.K., Otachi, E.O. & Ong’ondo, G.O. Parasite Communities of Oreochromis niloticus baringoensis (Trewavas, 1983) in Relation to Selected Water Quality Parameters in the Springs of Lorwai Swamp and Lake Baringo, Kenya. Acta Parasitologica. 65, 441–451 (2020).
  4. Ogoma Maurice, Bernard Kirui, Gilbert Obwoyere, Evance Obura, and Elick Otachi. 2019. “Factors Influencing Capacity of Beach Management Units in Implementing Fisheries Co-Management in a Tropical Desert Lake”. Egerton Journal of Science and Technology 17 (1-139), 29-49
  5. Adamba, S. W. K., Otachi, E. O., & Ong’ondo, G. O. (2019). Some aspects of Oreochromis niloticus baringoensis (Trewavas, 1983) fishery assessment and influence of selected water quality parameters in the hot springs of Lorwai Swamp, Baringo, Kenya. Egerton Journal of Science and Technology, 17(1-139), 65-82.
  6. Caroline Jepkorir Kibet, Oscar Omondi Donde, Brian Okwiri, Elick Onyango Otachi (2019) Taxonomic status of fish parasites in Kenyan inland water systems and their significance on the freshwater fisheries and aquaculture productivity within the region. Lakes & Reserv. 2019; 00: 1–9. DOI: 10.1111/lre.12284  
  7. Ngesa Elizabeth Adhiambo Otachi Elick Onyango Kitaka Nzula Kivuva (2019). Some biological aspects of straightfin barb, Enteromius paludinosus (Peters 1852) during the rainy season in Lake Naivasha, Kenya. Scientific African Volume 4.       
  8. Elizabeth Adhiambo Ngesa, Elick Onyango Otachi and Nzula Kivuva Kitaka. A Little Fish with a High Heavy Metals Burden: The Case of Straightfin Barb, Enteromius paludinosus (Peters 1852) from River Malewa, Naivasha, Kenya. J Environ Anal Toxicol 2018, Vol 8(4): 583     2.67 DOI:10.4172/2161-0525.1000583
  9. Renis Auma Ojwala, Elick Onyango Otachi, Nzula Kivuva Kitaka (2018). Effect of water quality on the parasite assemblages infecting Nile tilapia in selected fish farms in Nakuru County, Kenya. Parasitology Research, DOI : 10.1007/s00436-018-6042-0
  10. Otachi EO, Rindoria NM, Medhanit MM, Ayeka PA, Wąs-Barcz A.(2018) First record of dwarf Victorian mouthbrooder Pseudocrenilabrus multicolor victoriae (Schöller,1903) in Lake Naivasha, Kenya, including data on its molecular identification: Management implications. Lakes & Reserv. 2018; 00:1–6.  
  11. Thon C. C., Otachi O. E. and Oldewage A. A (2017). Endo-helminths Infestation in Nile Perch, Lates niloticus, (L.,) and Nile Tilapia, Oreochromis niloticus (L.,) in Winam Gulf of Lake Victoria, Kenya. Egerton J. Sci. & Technol. Volume 16: 161-172. ISSN No. 2073 – 8277
  12. Christof Plessl, Elick O. Otachi, Wilfried Körner, Annemariè Avenant-Oldewage, Franz Jirsa (2017). Fish as bioindicators for trace element pollution from two contrasting lakes in the Eastern Rift Valley, Kenya: spatial and temporal aspects. Environ Sci Pollut Res, DOI 10.1007/s11356-017-9518-z  
  13. George A.A. Omondi, Elick O. Otachi, Jonathan M. Munguti (2017). Growth performance of Nile tilapia in cage monoculture and polyculture with African catfish and African carp. Aquaculture International DOI 10.1007/s10499-017-0143-0
  14. Peter Amwoga Ayeka; Bian Yu Hong; Peter Githaiga Mwitari; Chu Xiao Qian; Zhang Yan Zhun; Rosette Uzayisenga; Elick Onyango Otachi (2016). Immunomodulatory and anticancer potential of Gan cao (Glycyrrhiza uralensis Fisch.) polysaccharides by CT-26 colon carcinoma cell growth inhibition and cytokine IL-7 upregulation in vitro. BMC Complementary and Alternative Medicine 1.14  doi: 10.1186/s12906-016-1171-4
  15. Rindoria, N.M., Mungai, L.K., Yasindi, A.W., Otachi, E.O. (2015). Gill monogeneans of Oreochromis niloticus (Linnaeus, 1758) and Oreochromis leucostictus (Trewavas, 1933) in Lake Naivasha, Kenya. Parasitology Research. DOI 10.1007/s00436-015-4883-3
  16. Otachi, E.O., Plessl, C., Körner, W., Avenant-Oldewage, A., Jirsa, F. (2015). Trace Elements in Water, Sediments and the Elongate Tigerfish Hydrocynus forskahlii (Cuvier 1819) from Lake Turkana, Kenya Including a Comprehensive Health Risk Analysis. Bull Environ Contam Toxicol DOI 10.1007/s00128-015-1603-8
  17. Otachi, E.O., Magana, A. M., Jirsa, F., Frank-Fellner, C. (2014) Parasites of commercially important fish from Lake Naivasha, Rift Valley, Kenya. Parasitology Research 113(3), 1057-1067
  18. Otachi, E.O., Szostakowska B., Jirsa, F., Frank-Fellner, C. (2014). Parasite communities of the elongate tiger fish Hydrocynus forskahlii (Cuvier 1819) and red belly tilapia Tilapia zillii (Gervais 1848) from Lake Turkana, Kenya: influence of host sex and size. Acta Parasitologica 2015, 60(1), 9–20   doi: 10.1515/ap-2015-0002
  19. Otachi, E.O., Körner W., Avenant-Oldewage A., Frank-Fellner, C., Jirsa, F. (2014) Trace elements in sediments, blue spotted tilapia Oreochromis leucostictus (Trewavas, 1933) and its parasite Contracaecum multipapillatum from Lake Naivasha, Kenya, including a comprehensive health risk analysis. Environmental Science and Pollution Research 21(12), 7339-7349
  20. Otachi, E.O., Locke, S.A., Jirsa, F., Frank-Fellner, C., Marcogliese, D.J. (2014) Morphometric and molecular analyses of Tylodelphys sp. metacercariae (Digenea: Diplostomidae) from the vitreous humour of four fish species from Lake Naivasha, Kenya. Journal of Helminthology, doi: 10.1017/S0022149X14000170
  21. Otachi E. O., Magana A. M., Simiyu L. N. and Omweri J. O. (2012) Fluctuating Asymmetry in Selected Fish Species in Lake Naivasha: Biomarkers for Environmental Stress. Journal of Environmental Natural Resources Management and Society (JENRS): 29-44 link
  22. Otachi, E., Wathuta, E., Magana, A., Fioravanti, M. L., Florio, D., and Konecny, R. (2011) Comparative Ecological Analysis of Fish Parasitofauna in a Hub-Plot Aquaculture System: Implications for Aquaculture in Kenya. Egerton Journal of Science and Technology, 11: 87-103
  23. Andrea Gustinelli, Monica Caffara, Daniela Florio, Elick O. Otachi, Euty M. Wathuta, Maria L. Fioravanti. (2010). First description of the adult stage of Clinostomum cutaneum Paperna, 1964 (Digenea: Clinostomidae) from grey herons Ardea cinerea L. and a redescription of the metacercaria from the Nile tilapia Oreochromis niloticus niloticus (L.) in Kenya. Systematic Parasitology 76:39-51.doi: 10.1007/s11230-010-9231-5
  24. Daniela Florio, Andrea Gustinelli, Monica Caffara, Francesco Turci, Francesco Quaglio, Robert Konecny, Tanja Nikowitz, Euty M. Wathuta, Adiel Magana, Elick O. Otachi, Geraldine K. Matolla, Hellen W. Warugu, David Liti, Raphael Mbaluka, Benson Thiga, Jonathan Munguti, Peter Akoll, Wilson Mwanja, Kassahun Asaminew, Zenebe Tadesse, (2009). Veterinary and public health aspects in tilapia (Oreochromis niloticus niloticus) aquaculture in Kenya, Uganda and Ethiopia (Aspetti veterinari e di sanità pubblica nell’allevamento della tilapia (Oreochromis niloticus niloticus) in Kenya, Uganda ed Etiopia). ITTIOPATOLOGIA. 6: 51-93  Link
  1. Christof Plessl, Elick O. Otachi, Wilfried Körner, Annemariè Avenant-Oldewage, Bernhard K. Keppler, Franz Jirsa. (2016) Lake Turkana and Lake Naivasha: fish as bioindicators for trace element pollution from two contrasting rift valley lakes, Kenya. XXXIII CONGRESS by International Society of Limnology SIL 2016,TORINO,ITALY 31 JULY-5 AUGUST
  2. 10th Egerton University international conference March 2016: A morphogenetic analysis of gill monogeneans infecting the Redbelly tilapia, Tilapia zillii (Gervais, 1848) from Lake Naivasha, Kenya: New species and biogeographical records
  3. Motivational talk to farmers: linking farmers to research and University resources. 3rd March 2016 at Egerton University. The seminar was part of AWARD role modeling event organized by AWARD fellow: Ms. Mercy Wamalwa. Title of talk: Kilimo cha samaki
  4. First Biological Sciences Departmental seminar, 09.02.2016, Egerton University. Title of presentation: Fish parasites and trace elements in two contrasting Rift Valley Lakes
  5. Pathways Kenya 2016 Conference: Fairmont Mount Kenya Safari, Nanyuki. Title of paper: Trace elements in Contracaecum multipapillatum (L3) in relation to its fish hosts from two Kenyan lakes-among others
  6. TropiLakes conference at RahNile Hotel Bahir Dar Ethiopia 23rd September-30th September 2015. Title of paper: Comparative Analysis of Major and Trace Elements Concentrations in Two Contrasting Rift Valley Lakes in Kenya: Water, Sediments, Fish and Parasites
  7. November 2014: 48th Annual Meeting of the Austrian Society of Tropical Medicine, Parasitology and Migration Medicine in Graz, Austria. Paper presented: Morphometrics vs. Genetics: Tylodelphis sp. from four fish species in Lake Naivasha, Kenya.
  8. June 2013: ÖGTPM Parasitological Day 2013, Klagenfurt, Austria. Paper presented: Parasites of commercially important fish from Lake Naivasha, Rift Valley, Kenya
  9. June 2012: XI European Multicolloquium of Parasitology (EMOP) in Cluj Napoca, Romani. Paper presented: Parasites of fish from Lakes Naivasha and Turkana, Rift Valley, Kenya
  10. November 2011: ÖGTP, Austrian Society of Tropical Medicine and Parasitology, Vienna, Austria. Poster presented: Parasites of fish from Lakes Naivasha and Turkana, Kenya: first results
  11. Sept. 2nd to 4th 2009: attended BOMOSA final conference held at Machakos Garden Hotel. I presented the following papers;
    1. Survey of bacterial outbreaks in farmed Tilapia (Oreochromis niloticus) from Kenyan BOMOSA plots
    2. Veterinary and public health aspects linked to BOMOSA farming systems
    3. Cause of fingerlings mortality in Kwa-Ngeki’s reservoir, Machakos district, Kenya
    4. Occurrence of Protozoan, Acanthocephalan and Helminth parasites in Nile Tilapia (Oreochromis niloticus, L.) ponds in Eastern and Central provinces of Kenya
  12. Sept 16-19th 2008: 3rd Research week and International Conference held in Egerton University. I presented two papers titled:
    1. Studies on occurrence of protozoan, Acanthocephalan and Helminth parasites in Nile     Tilapia (Oreochromis niloticus, L.) from ponds in Central and Eastern Provinces, Kenya.
    2. Diplostomiasis in pond and cage cultured Oreochromis niloticus in Sagana Aquaculture centre and Machakos Kwa-Ngeki’s reservoir, Kenya.
  13. February 23rd-25th 2010: attended a proposal writing workshop held in Egerton University (CMRT). Skills learnt: retooling in proposal writing such as writing a problem tree, objective tree, logframe, budget etc
  14. September 6th -19th 2009: attended DelPHE field IT for East African, the development of “virtual field courses” for Kenyan and Tanzanian universities through field research/training camps where digital methods are used for recording scientific research directed at sustainable water basin management, held at the Lake Naivasha, Kenya by the University of Leicester in collaboration with the University of Nairobi
  15. June 7-12th 2009: attended workshop on curriculum development for the Egerton trimester of the Masters of Science in Environmental sciences specialization in Limnology and wetland ecosystems held at Machakos Garden Hotel. Contribution: Module 8; Fisheries and Aquaculture, RESOURCE PERSON
  16. EAWA (East Africa Water association) Exhibition, taking EAWA to stakeholders: Knowledge and Technological Transfer through Interaction held at Kisumu hotel Kisumu, Kenya on the 12th to 14th June 2008 sponsored by the Austrian Development Co-operation.
  1. Awarded medal for the Best graduating student in Faculty of Science 2005

2. Awarded Best presenter award in Egerton University International Conference and Research week in 2015

  • Aqua 350: Aquaculture
  • Aqua 351: Mariculture
  • Aqua 100: Fundamentals of Hydrobiology
  • Zool 100: General Zoology
  • Aqua 452: Integrated Aquaculture Systems
  • Bota 302: Biostatistics
  • Limn 741: Biomonitoring of Inland Waters


  • Supervisor: Parasite communities of Oreochromis niloticus (l.) in relation to selected water quality parameters in the springs of Loboi swamp and Lake Baringo, Kenya. MSc study by Stephanie Wangare Kamau Adamba. Graduated 2020
  • Supervisor: Determination of heavy metal levels in Straightfin barb (Enteromius paludinosus, peters 1852) and its endo-parasites as bioindicators in Lake Naivasha, Kenya. MSc study by Elizabeth A. Ngesa. Graduated in Dec 2019
  • Supervisor: Effect of water quality on the parasite assemblages infecting Nile tilapia (Oreochromis niloticus, Linnaeus 1758) in fish farms in Nakuru County, Kenya. Graduated in June 2017
  • Supervisor: A survey of the endoparasites infecting Nile tilapia and Nile perch in Winam Gulf of Lake Victoria, Kenya. A MSc. research study by Chan Chol Thon (South Sudanese). Graduated in Dec 2017
  • Supervisor: Growth performance and water quality analyses in cage monoculture and polyculture of Nile tilapia (Oreochromis niloticus) with African catfish (Clarias gariepinus) and African carp (Labeo victorianus). A MSc. research study by George A.A. Omondi, Egerton University. Graduated in Dec 2016
  • Supervisor: Morphometric analysis of monogenean parasites of cichlid and cyprinid fish in Lake Naivasha, Kenya. A MSc. Study by Mr. Rindoria, Nehemiah Mogoi. Egerton University, Graduated in June 2016
  • Supervisor: Assessment of the influence of Bujagali falls hydropower station on the fish assemblages of the upper Nile River. A MSc. research study by Joshua Tazibirwa (Ugandan). Graduated in June 2016


  1. Eastern Africa Water Association

Prof A Avenant-Oldewage (External peer)

Head of Department,

Department of Zoology,

University of Johannesburg,

PO Box 524,

Auckland Park, Johannesburg,


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Dr. Franz Jirsa, (PhD Supervisor),

Institute for Inorganic Chemistry,

University of Vienna,

Althanstrasse 14, Uza Ii,

A-1090 Vienna.

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Dr. Steve O. Omondi, (Direct Report)

Dept. Of Biological Sciences,

Egerton University,

P.O. Box 536,


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