Recent Publications:
March 2025
Tilapia Vaccination Handbook Virbac Download here
October 2024
Fish farmers calendar: Rwanda Pond Farm Master Training Programme : 12 monthly calendar showing production cycle jobs on the farm each month pdf available on request williamleschen@gmail.com
October 2024
ThinkAqua: Rwanda Pond Farm Master Training Programme Workshop Manual 2:
Month 2 – Month 8 of mid production cycle: Tilapia Pond Management practices towards profitable fish farming. William Leschen, Gilbert Nzigiyimana. pp32
Master Training Phase 2 Manual WL3.pdf
April 2024
ThinkAqua: Rwanda Pond Farm Master Training Programme Workshop Manual 1:
The beginning of a tilapia pond production cycle: Pond preparation, fingerling stocking , and the first month....... getting a good start. William Leschen, Gilbert Nzigiyimana, Simon Rukera Tabaro pp26
ThinkAqua_English Version_April 2024_for PRINT.pdf
June 2019
FISH (2019). Improving Technical Efficiencies of Small-scale Commercial Fish Farmers in Malawi – Lessons Learned from 9 Farmers. USAID/FISH Project, Pact Publication, Lilongwe, USAID (2019) FISH-IMANI Improving Technical Efficiencies of Small-scale Commercial Fish Farmers in Malawi – Lessons Learned from 9 Farmers_final.pdfMalawi: 52 pp.
June 2023
Report: Aquatic Health in Sub-Saharan African Aquaculture: Perceptions and recommendations for evidence-based sector strengthening
Produced by Leschen W., Immink A.
Casammak Aquaculture and ThinkAqua
With financial support of the Food and Agriculture Organisation of the United Nations (FAO).
Report from online survey carried out with 4 main stakeholder groups: Private, Government, Research and Academia, and NGO .... with special emphasis on private sector.
Download here Africa AAH report-published 11.pdf
April 2023
CoA - Tilapia Vaccination - Mr Sandy Chatham - Final version.pdf
CoA - Vaccine Economics - Mr Adrian Astier - Final version.pptx.pdf
Both powerpoint presentations from Aquaculture Ghana Symposium Ghana Chamber of Aquaculture - April 2023
February 2023: Series of 10 SS African country Aquatic Health Information Briefs released and available for download:
These 10 informative, user-friendly briefs for:
Ghana.pdfKenya.pdfMadagasgar.pdfMalawi.pdf
Mozambique.pdfNigeria.pdfSierra Leone.pdf
South Africa.pdfTanzania.pdfZambia.pdf
provide key, up to date information and useful contacts for those working in or affected by fish and shrimp diseases as aquaculture continues to commercialise across the continent.
Produced by Leschen W., Immink A.
Casammak Aquaculture and ThinkAqua
We also wish to thank and acknowledge Dr Gillian Taylor, John Domozoro, and Venny Mzire Mwainge as well as a number of other specialists across the 10 countries who contributed to the contacts and information presented in these briefs.
With financial support of the Food and Agriculture Organisation of the United Nations (FAO).
We welcome any feedback or updates on the content/ contacts within these briefs - please send to williamleschen@gmail.com as we wish to keep them up to date and relevant/beneficial for all users.
National Fish Health/Fish Diseases Ghana: Video and Case Study
An illustrated written case study and also 20 minute accompanying video were produced from Nov 2021 by Casammak Aquaculture in conjunction with University of Ghana Legon and Gatsby East Africa - can be found at link below: 
Ghana National Fish Health Case Study Final Draft WL1.pdf
Ghana Fish Health/Fish Diseases Case Study Video
Tilapia
Ghana small scale pond culture manual 2020.pdf
Clarias Catfish
Tank-based catfish guide Nigeria K Veverica 2009.docx
Shrimp
The rise and demise of the commercial shrimp farm, Amatikulu Prawns (Pty) Ltd., 1989 to 2004 (Kwazulu Natal, South Africa) SARNISSA Case Study Laurence Evans (2009) Amatikulu Final.pdf
Feed
Munguti et al Feed status in Kenya.pdf
Hatchery
Fish Hatchery Manual for Africa Haylor Muir.pdf
A Guidebook of Tilapia Hatchery Operations for Small-scale Commercial Fish Farmers in.pdf
Ghana Tilapia Hatchery operations manual.pdf
aceto-carmine-method.pdf Method for determining all male % of each batch of sex reversed tilapia fry
macintosh-SFP MT paper.pdf Risks Associated with Using Methyl Testosterone in Tilapia Farming D Macintosh
Aquatic Animal Health
CoA - Tilapia Vaccination - Mr Sandy Chatham - Final version.pdf
CoA - Vaccine Economics - Mr Adrian Astier - Final version.pptx.pdf
Both from Aquaculture Ghana Symposium Ghana Chamber of Aquaculture - April 2023
2018_17_Investigation of tilapia mortality in Ghana.pdf
Countries
The State and Development of Aquaculture in Egypt _Cairo_Egypt_11-6-2016.pdf
Rise of PU Aquaculture in Nigeria Miller 2011.pdf
Urban aquaculture Lagos perceptions.pdf
Africa General