Natural Sciences
Make Mathematics speak to the public & link it to economic growth, Minister Musenero appeals to Mathematicians
By Ritah Namisango
The Minister for Science, Technology and Innovations, Hon. Dr. Monica Musenero called upon mathematicians to ensure that mathematics speaks to the public in a language they could understand and use for economic development. This was during the opening of the four-day joint African-Nordic Mathematics conference that was held at Makerere University under the theme, “Celebrating 20 Years with ISP/EAUMP/SIDA, 10 Years with CIMO/HEI-ICI and Commencing the NORHED II-Funded Mathematics for Sustainable Development Project from 1st to 4th August, 2023.
The Conference brings on board over 150 mathematicians from 15 countries including Kenya, Tanzania, Rwanda, Zambia, Namibia, Ethiopia, Botswana, South Africa, Australia, Norway, Hungary, Denmark, Germany, USA and Uganda the host.
The conference is aimed at stimulating regional and international collaboration in training, research and outreach; honouring Professor Leif Abrahamsson for his great contribution to the development of mathematics in the East African region and beyond; celebrating the new Mathematics initiative MATH4SD in the region under NORHED-II as well as providing a forum for interaction among mathematicians from Africa and beyond with a view of sharing experiences in mathematical training, research and outreach activities.
Officially opening the Conference, Hon. Monica Musenero, an alumna of Makerere University informed the mathematicians that linking mathematics with science, technology and innovation is a key driver to economic development. So, when people are isolated and separated from such an important subject, leaving it in an academic corner, we miss 50% of the development. She appealed to the mathematics researchers to break down their findings to make them relevant to the entire public. She advocated for mathematics publications that can be read, understood and appreciated by the public for economic growth.
“If we are to have our economy grow, then we are going to come back to the corner of science and start to interpret what it means. We really need to functionalize the definition of mathematics. In simple terms, science is knowledge. I can speak that to a kindergarten pupil and they understand it. I am sure that people here have very specialized knowledge, but it has to be translated into technology and simply using mathematics to develop tools. I am sure there are very many tools that have been developed. However, for the public, we find it difficult to see those tools. So, we need to understand them such that they can speak and make sense to us,” Hon. Musenero said.
The Minister said that the academia struggle to find funds partly because some of the people who would provide those funds are not able to translate the mathematics language. She stated that if they could focus on translating the mathematics to make it visible, then obtaining funds would be quite easy. She thus urged the researchers to use their findings to create knowledge and develop tools to find solutions to people’s problems, where they live, work and spend their day to day lives.
“I would like to bring this from our side by saying that, please let mathematics speak to us. Make the PhDs speak to us. In science we do research and generate knowledge, but the knowledge must be transformed into tools. For instance, we used calculators in schools, but we never realized the mathematics in those calculators. That is a task that we have to walk this journey to translate the science into enterprises, such that we can bring about our socio-economic transformation.” She remarked.
Speaking about transforming Uganda’s economy, Hon. Musenero said that the country is focused on the socio-economic transformation. She stated that Science is no longer just a sector, but an approach to economic development. She highlighted that in order to take science as an approach, we can only do that if we are able to bridge the gap between knowledge and understanding. She emphasized that research is the only avenue for production of high caliber human resources as well as the best input into a country’s human capital. “When the nation is engaged in research, it rapidly increases its human capital and following closely would be the development of the nation and the transition from a commodity based economy to a science led economy.”
On behalf of the Government of Uganda, the Hon. Musenero acknowledged the Nordic governments for the generous support towards the advancement of research and innovations in mathematics in Uganda. She also committed to working with key players to ensure that the investments would be effectively translated to ably formulate well informed policies that will lead to sustainable development as well as development of tools and innovations.
To the mathematics researchers and graduates supported under the NORAD program, the Minister invited them to a dialogue so that they discuss strategies that will benefit the country. “I invite the Masters and PhD graduates, especially those from Uganda for a dialogue to see how to develop our country together and retain you in the country. We badly need you now, but many have in the past exited the country because they have not been seeing where else to go. We also need to find a way on how those who already left the country can come back home to work together.”
The Vice Chancellor, Prof. Barnabas Nawangwe commended the Nordic governments of Sweden, Norway, Finland and Denmark for supporting Makerere University and other regional universities in the areas of human resources capacity building, research, library sciences and information technology and infrastructure development.
“The Nordic support has greatly played a relevant role in helping Makerere University to deliver our core functions which are teaching, research and innovations and partnerships. Makerere University has benefited significantly from the very strong relationship and support from the Nordic countries. In particular, I must say that Sida and NORAD have helped us to come out of those difficult years and they have helped us to train more than 600 PhDs over the last 20 years. We are indeed very grateful,” Prof. Nawangwe said.
Prof. Nawangwe called upon staff, individuals and universities from Africa that had received the NORAD and Sida support to use it for capacity development and multiply the benefits of that capacity. He said that if that support is put to good use, it will help Africa to get out of the prevailing circle of poverty.
The Vice Chancellor underscored the value of mathematics. He categorically stated that mathematics is the mother of all sciences, and without it, we could not get anywhere. According to Prof. Nawangwe, the work of mathematicians is the foundation of everything that we want to do in science and developing our countries.
During the opening ceremony, Makerere University recognized Professor Leif Abrahamsson for his valuable and selfless contribution towards the development of mathematics in the East African region and Uganda in particular.
“Today, we are honoring you Professor Leif Abrahamsson for the work you have done. As part of establishing everlasting memories of you in the East African region, Makerere University will establish the Leif Abrahamsson Chair for supporting mathematics in the Region.”
The Vice Chancellor noted that to solicit for funds to support the region in Mathematics, there is need to use the name ‘Leif Abrahamsson’ to permanently get support for Mathematics. He revealed to the participants that through this Chair, the University would target to raise at least USD 500,000 per year to support Mathematics in the East African region.
Prof. Bengt-Ove Turreson, the Director-International Science Program (ISP) said that ISP at Uppsala University-Sweden works to strengthen the scientific knowledge, research capacity and postgraduate education in the basic sciences that include mathematics, physics and chemistry in countries where such capacity is non-existing or weak.
As they celebrated 20 years of existence of the Eastern Africa Universities Mathematics Programme (EAUMP), Prof. Bengt-Ove Turreson recalled that in the early stages things quite difficult, but became better in 2002 when EAUMP was established. The network which started with three (3) countries namely Uganda, Kenya and Tanzania, was later extended to Rwanda and Zambia, and it has played an important role in building human capacity. In the recent years, ISP started supporting PhD programs in the region. They started with supporting four (4) research groups.
“What we are doing in terms of global research is very unique. There is no other country that does this kind of work. All the countries are proud of the work we have been doing. We started working in 1961. We provide long-term funding, coordination and mentoring to research groups and regional scientific networks at universities and research institutes in low and lower-middle income countries in Africa, Asia and Latin America. Our main funding comes from the Swedish Government through the Swedish Development Cooperation Agency (Sida),” said the Director.
Prof. Turreson remarked that in addition to seminars such as the ongoing mathematics conference at Makerere University, EAUMP would establish summer schools to bring on board young mathematicians from the different parts of the world to enhance the new modern mathematics.
The Inter-University Council for East Africa (IUCEA) disclosed that mathematics is proven to be indispensable to human development and economic growth since the time of the industrial revolution.
“The third revolution brought about by the advance in communication and information technology finds its origin from applied mathematics and physics to a larger extent. We are now in the fourth industrial revolution which has been brought largely by data and artificial intelligence, which too find their roots from different parts of mathematics such as probability and statistics. The initiatives that involve AI or data science are driven by mathematics. Therefore, for the region to catch up with technological advances, it should prioritize mathematics, education and research,” said Prof Rai, Deputy Executive Secretary-IUCEA who represented the Executive Secretary- Prof. Gaspard Banyankimbona.
Prof. Idris Rai assured participants that the interactions, engagements and networking of researchers will bring out more collaborative research activities to the region in addition to expanding knowledge in research and mathematics.
Counting the gains, Prof. Stephen Luketero, the overall coordinator of the Eastern Africa Universities Mathematics Programme (EAUMP) that was established in 2002, to alleviate the dismal state of Mathematics in Eastern Africa noted that with support and funding from Sida and NORHED, the region has been enriched with numerous developments in terms of knowledge. He stated that a substantial number of PhDs has been produced across the region in excess of 50 PhDs and countless number of masters. He also noticed that as a result, the number of females enrolling for PhDs in Mathematics was tremendously increasing.
“We have been able to have quite a big number of students in pursuit of the doctorates and post doctorates over a time. The research groups have been formed and out of such research collaborations, it is quite easy for the teams to come together and participate in writing research grants that can enhance research within the region. There was a wing that was created to cater for the advancement of knowledge and progression of female students and this has also run very well. Quite a number of graduates we are producing have been able to bridge the gap between male and female mathematicians.” Prof. Luketero said.
Speaking about Sida, ISP, NORAD support, CIMO and the achievements and future of EAUMP/NORHED, Prof. John Magero Mango the EAUMP Internetwork Coordinator said that with support under the NORDIC program, they have trained 11 PhDs in mathematics of which 5 are from Makerere University and 6 from University of Dar es Salaam. In addition, he stated that over 100 Masters have been supported with over 100 publications.
“The NORAD fund at Makerere University from 2021 to 2026 is supporting five (5) PhDs. We evaluated our progress and as we review the curriculum which we formed under Sida, we are also concentrating on the outreach programs for Data Computation skills via mathematics. Those are key innovations that are worth recognizing at this moment under the support of our NORDIC friends. Under CIMO, we have greatly benefitted in extending our knowledge to the local industries.” Prof. Mango said.
The Principal, College of Natural Sciences at Makerere University, Prof. Winston T. Ireeta mentioned that organizing such a conference that brings on board 15 countries was a great achievement for the College, the Mathematics Department and Makerere University at large.
He said, “This gives us credibility and great visibility as Makerere University. We also have some goals we have set up to achieve some of which are through collaborations and interacting with others. Let us work on achieving them. Collaborations and networking are very important.”
He applauded the Local Organizing Committee chaired by Dr. Godwin Kakuba and the professors who have greatly helped during examinations and PhD defenses. He also thanked the funders of the mathematics projects, ISP and Nordic governments for the support they have rendered in the promotion of mathematics.
Taking stock of the collaborations with major universities in Kenya, Tanzania, Rwanda, Zambia, Ethiopia, Finland, Norway and many other universities in the region, Dr. Godwin Kakuba, the Head of the Department of Mathematics at Makerere University said hosting the conference provided a platform to celebrate the collaborations that had enabled the department to grow to such strength.
“As the head of department, I am very proud of these achievements and very optimistic about the future with profound joy. When we look back to so many years ago, about 20 years, the number of PhDs was minimum, but now, having a PhD has become normal. The department of mathematics is therefore ready to take that direction towards transforming Makerere University into a research-led institution,” he remarked.
Dr. Kakuba added that they will always measure their strengths annually basing on the number of publications made, the number of graduate students trained, number of research workshops and conferences organized and hosted as well as the goals achieved each year.
During the four day conference, research papers and poster presentations focused on the following areas: Algebra, Graph Theory, Real and Complex Analysis, Topology and Geometry, Dynamical Systems, Experimental Pure Mathematics, Biomathematics, Data Science, Biostatistics, ODES and PDES, Financial/Insurance Mathematics, Numerical Analysis, Fluid Dynamics, Operations Research, Stochastics, Applied Probability and Mathematical Statistics, Mathematics Education, Optimization, Bioinformatics, Clifford and Hypercomplex analysis as well as Combinatorics.
Natural Sciences
Mak Researchers develop Innovative Integrated Wetlands-bivalve system to Mitigate Effects of Pollution in Aquaculture farms in the Lake Victoria Basin
By Hasifa Kabejja & Dr. Robinson Odong
Overview
The fisheries sub-sector in Uganda is crucial, supporting over 5 million livelihoods and providing essential protein for up to 17 million people, with an average consumption of 10 kg per capita. Uganda’s population is projected to double in the next 27 years, prompting the National Development Plan III to aim for a significant increase in fish production, with aquaculture expected to contribute 1 million MT by 2030. The Fisheries and Aquaculture Act 2022 emphasizes adherence to National Environmental Management principles to achieve sustainable production systems.
However, as aquaculture grows, the sector faces environmental challenges due to increased intensive production and on-farm waste, including nutrients from feed, uneaten feed, poor quality feeds, pseudofeces, escaped farmed fish, and residual chemicals. These pollutants pose risks such as habitat quality deterioration, biodiversity loss, eutrophication of waterways, and the emergence of drug-resistant pathogens.
Mitigating the effects of environmental pollution from aquaculture
Through a Project titled: Mitigating the Effects of Environmental Pollution from aquaculture on freshwater resources in Lake Victoria Basin (MEEP), researchers from Makerere University in collaboration with the National Environment Management Authority (NEMA) set out to assess the effects of aquaculture facilities and practices on Lake Victoria, its catchment rivers and wetlands. The team led by Dr Ronald Semyalo from the Department of Zoology, Entomology and Fisheries Sciences (ZEFS) at Makerere University subsequently examined the effectiveness of innovative technologies, such as integrated wetland-bivalve systems, in mitigating these impacts. They also reviewed the application of national environment and aquaculture regulations in controlling environmental pollution. The study surveyed fish farms in three districts of Buikwe, Jinja, and Mukono within the Victoria Water Management Zone. Other project team members were: Dr Jerome Lugumira from NEMA, Dr Robinson Odong and Mr. Drake Ssempijja from ZEFS, Makerere University, and Ms. Ritah Namisango, Senior Public Relations Officer at Makerere. The Project was supported by the Government of Uganda through the Makerere University Research and Innovations Fund (MakRIF).
During their engagement with different stakeholders in the fishing industry including the fish farmers from Jinja, Buikwe and Mukono, as well as experts from the Directorate of Water Resources at the Ministry of Water and Environment, NEMA, and the Directorate of Aquaculture Development at MAAF, the research team established that only 138 out of 380 registered fish farms were active, with 45.6% of the farms in Jinja, 35.5% in Mukono; and 18.8% in Buikwe. Overall, over 60% of the farms were inactive posing serious environmental threats.
Dissemination of the research findings
On 26th June 2024, the project team held a workshop at Colline Hotel Mukono to disseminate the research finding to stakeholders who included fish farmers from Buikwe, Jinja and Mukono, District Fisheries Officers, as well as representatives from NEMA and MAAIF. In the presentations, the team highlighted the environmental impacts of aquaculture practices and the possibility of innovatively using nature-based, environmentally friendly innovations as a mitigation measure. The presentations covered farm characteristics, water and feed management practices, water quality assessments and waste management methods. The participants engaged in discussion on the implications of the results and shared their experiences and challenges in managing aquaculture operations.
Key findings as disseminated by the PI
Out of the 380 farms, 119 were assessed. Below are the key findings;
- Environmental Impact Assessment: It was established that 81% of the farmers had not conducted Environmental Impact Assessments (EIAs) and Environmental audits. This, the researchers noted was one of the major causes of abandoned farms.
- Farm Characteristics: The majority of farms used earthen ponds (66.9%) and were semi-intensive (63.6%), relying on manufactured feed and pond fertilization. Intensive farms (30.5%) exclusively used manufactured feeds, while extensive farms (4.2%) relied solely on pond fertilization.
- Fish Species: Nile tilapia was the top choice (96.1%) for monoculture farms, while tilapia and catfish were preferred for polyculture systems (46.9%). Intensive farms predominantly farmed Nile tilapia.
- Demographics: Most respondents were male (90.7%), with a median age of 35 years. The largest age group was 31 to 59 years (43.2%).
- Fish diseases: The research revealed a number of diseases affecting aquaculture including: lesions/wounds on the belly and cysts on the scales, skin lesions and cysts on the belly, popping eyes and white substance on fins, open skin wounds, open wounds on the head, skin lesions – greyish, swollen eyes, whitish and black patches on the skin on the pelvic fin, wounds on the head.
- Water Use: Fish farms primarily relied on spring water and lake water. Other sources, such as streams, wells, and rivers, were also utilized. In most cases, the water source was shared with the community. Only a small percentage of respondents acknowledged any known disease outbreaks on their farms. There was a strong association between the district in which the farm was located and the water source used. Majority of those using lake water were in Jinja District, while most of those using spring water were in Mukono District. Additionally, there was a significant association between the fish species cultured and the water source used.
- Feed Management: A significant proportion of the farms heavily relied on factory-made feeds. These feeds were often used in combination with farm feed materials, such as maize bran, potato vines, yam leaves, and kitchen waste. A smaller number of farmers exclusively relied on farm-made feeds, while an even smaller percentage solely relied on pond fertilization. Manufactured feeds were used in various forms: powder and floating pellets, powder, crumble, and floating pellets, powder only, floating pellets only, and sinking pellets. The most prevalent method of feed delivery was feeding by response, while some farms also practiced feeding by ration.
- Waste Management: The findings indicated a concerning lack of treatment for aquaculture effluent, with majority of respondents (69%) releasing it directly into natural streams or wetlands. This highlights the need for improved environmental management practices. Common waste sources included faecal matter and dead fish. Most farms incinerated or buried solid waste.
- Water Quality: Measurements at the representative visited farms showed compliance with FAO optimal conditions for fish farms. The physicochemical parameters of the farms visited were in line with FAO optimal conditions for fish farms.
- Prevailing Regulatory System: A comprehensive gap analysis was conducted to supplement the findings from the survey. It aimed to identify weaknesses and areas for improvement in current policies and regulations governing aquaculture. It also evaluated the effectiveness of existing measures in addressing environmental pollution, waste management, and sustainable water use. This exercise provided a foundation for developing more robust and effective regulatory frameworks that support sustainable aquaculture practices, protect water resources, and enhance the overall environmental health of the Lake Victoria basin.
Project output
***Innovative Integrated wetlands-bivalves system was developed to mitigate the impact of pollution emanating from aquaculture on the environment
Effluent from poor aquaculture practices may contain uneaten feed residues and associated components, such as suspended solids, nutrient nitrogen and phosphorus and organic materials. If discharged without any form of treatment, such effluent contributes to excessive nutrient enrichment of water bodies, a phenomenon referred to as eutrophication. Eutrophic waters have diminished ecological value, for example are low in oxygen level and can lead to fish kills. Wetland plants, such as duckweeds can aid in cleansing of aquaculture effluent of excess pollutants, through various mechanisms. For example, the plant roots adsorb suspended solids, besides offering conducive attachment surfaces for beneficial microorganisms which perform various nutrient recycling roles. The plants also uptake excess nutrients, hence reducing their levels in water. Bivalves (Molluscs) are filter feeders, hence uptake and cleanse water of detrital or solid materials, hence augmenting the roles of the plants. The integration of wetlands-bivalves system offer synergistic roles in aquaculture effluent treatment. The plants and bivalves used in the treatment can in turn be removed and used for other beneficial purposes.
Presentation on policy gaps
During the dissemination workshop, Dr Jerome Lugumira, the Natural Resources Manager, Soils and Land Use at NEMA sensitized participants on the National Environment Act, 2019 with special emphasis on policy regulations for the aquaculture sector. He emphasized the need to acquire an EIA certificate before engaging in aquaculture. Highlighting the gaps in policy, Dr Lugumira noted that Schedule 4 of the National Environment Act, 2019 does not sufficiently guide the Fisheries sector; while the Physical Planning Act, 2010 is biased towards physical development planning, and the Water Act, 1997 provides for a waste discharge permit but no consideration of the extent of wastes discharged from fish farms of varying size and intensity is provided.
He further noted that the National Environment (Wetlands, Riverbanks and Lakeshores Management) Regulations, 2000 do not guide on areas where aquaculture best fits, indicating that the application of the 25% wetland area beyond which one needs approval is vague.
Additionally, he explained that the National Environment (Waste Management) Regulations, 2020 refer to fish waste generally and not whether it means waste from fish or all waste from fish farms, such as off-cuts, unwanted materials, and that the National Environment (Standards for Discharge of Effluent into Water or Land) Regulations, 2020 consider effluent discharge and not that released in-situ and that disposed directly into water via cages and into soil via land-based systems.
Dr Lugumira called for the review of the National Environment (Wetlands, Riverbanks and Lakeshores Management) Regulations, 2000, by requiring the mandated Lead Agency (WMD) to issue approvals for access to wetlands, and appending guidance on wetlands and lake areas where aquaculture is suitable. He suggested that submissions seeking approval from NEMA should have all required approvals from MAAIF, WMD and DLGs. “The assessment process should be supported by a technical officer skilled in fisheries sciences and not generalists,” he noted.
Overview on the state of capture fisheries and aquaculture in Uganda
Sharing an overview on the state of capture fisheries and aquaculture in Uganda, Mr. Geoffrey Dheyongera, Principal Fisheries Officer at MAAIF, noted that the global decline/stagnation in capture fisheries stocks had increased demand for fish, calling for a boost in fish production through stock enhancement in water bodies and promotion of aquaculture. “There is need for huge investment in aquaculture. The Aquaculture Policy targets 1 million MT from aquaculture through establishment of aquaparks with intensive management activities.”
Key concerns raised by the farmers
During the focused group discussions, participants highlighted a number of factors undermining the growth of the aquaculture sector. These include;
- Ignorance about the laws/policy guidelines
- Low skills and lack of exposure in aquaculture management
- Low numbers of technical staff to guide the farmers
- Inexperienced technical staff
- Cheating by fish seed producers
- Expensive and poor quality feeds
- Fluctuating prices of fish
- Competition with capture fisheries/negative attitude towards farmed fish
- Increased degradation of the environment which affects water quality
- High interest rates on loans
- Farmers fear for exorbitant taxes
Proposals for improvement
- Government should recruit technical staff to assist farmers
- Thorough training of extension staff
- Encourage value addition to farmed fish
- Integrate climate smart interventions in aquaculture
- Policies regulating the sector should be popularized
- Undertake periodical review of the existing policies
- Encourage multi-stakeholder involvement in the implementation of policies
- Invest in research responsive to fish and aquaculture sector needs
- Monitor quality of fish feeds to satisfy farmers’ needs and environmental safety
- Private hatchery operators must be supported by the responsible sector agencies to ensure quality seed. Likewise, fish seed must come from certified hatcheries.
- Inspection of farms should be strengthened
- Train farmers on proper aquaculture management practices
- Farmers should work in groups to reduce production costs, negotiate better prices for their products, access credit facilities and maximize profits
Remarks by the Guest of Honour, Mukono District CAO, and the Principal, CoNAS
In his remarks, the Guest of Honour, also Assistant Commissioner Aquaculture Management at MAAIF, Mr. Alio Andrew, guided the farmers on proper aquaculture practices, and encouraged Ugandans to invest in the fish sector. “The demand for fish has increased. Aquaculture remains a viable option,” he noted. He also raised the need to support private hatchery operators to produce quality seed, emphasizing that fish seed should only be bought from certified hatcheries. He highlighted the significance of biosecurity in aquaculture, and the need to collect appropriate data on the sector.
The CAO Mukono District called for intensified training of farmers in aquaculture management practices. She advised the farmers to work in groups if they are to make reasonable profits.
The Principal, College of Natural Sciences (CoNAS), Makerere University, Prof. Winston Tumps Ireeta, acknowledged the involvement of the community in research, and appreciated the fish farmers for actively participating in the project activities. He expressed gratitude to the Government of Uganda for the continued support towards research at Makerere University. Besides other initiatives geared towards improving research at Makerere, the Government is supporting over 700 research projects at Makerere through the Research and Innovations Fund. He also appreciated MAAIF and NEMA for the technical guidance extended towards the project.
Natural Sciences
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