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Publications (21)
Fish can help address human nutrient deficiencies but is often overlooked in nutrition policies due to insufficient evidence. This study evaluates the nutritional profiles of five economically significant fish species in the Lake Victoria Basin: Nile tilapia (Oreochromis niloticus), Nile perch (Lates niloticus), Silver cyprinid (Rastrineobola argen...
Multiple stressors are increasingly recognized as major concerns in the sustainability of aquatic ecosystems in Africa and the myriad of ecosystem services deriving to millions of people on the continent. Stressors commonly interact to affect environmental conditions (e.g., habitat and water quality), individual species, communities, and ecological...
Aquaculture is one of the fastest growing sector in agriculture. However, this increase is constrained by the high cost of fish feeds occasioned by scarcity of fish meal (FM) which is a main source of dietary protein in aquafeeds. This necessitates the need to consider alternative protein sources that are sustainable, cheap, available and highly nu...
Aquaculture plays an important role in the provision of food, livelihood and source of income in Kenya. There is a rapid shift from extensive methods to semi-intensive and intensive culture methods with the potential to produce higher output. However, intensification in aquaculture comes with risks of diseases. In recent years, there has been an in...
Aquaculture is one of the fastest growing sector in agriculture. However, this increase is constrained by the high cost of fish feeds occasioned by scarcity of fish meal (FM) which is a main source of dietary protein in aquafeeds. This necessitates the need to consider alternative protein sources that are sustainable, cheap, available and highly nu...
Kenya is a major player in the global ornamental trade, exporting substantial quantities of ornamental fish to the global market. The sector plays an important role in the country's economy through foreign exchange. However, the country's ornamental fish industry has not fully developed to generate more economic benefits. This paper sought to ident...
Utilization of quality aqua-feed relies heavily on fish meal sources of protein because of its nutritional balance. However, due to its limited supply, high cost, and decline of wild fish populations, aquaculture production has shifted focus to cheaper and more readily available alternatives to guarantee sustainable aquaculture productivity. Black...
The seven African Great Lakes are some of the most critical freshwater, large-lake systems in the world, providing
essential services, food, drinking water, and other livelihood support to over 62 million people. Like most
freshwater systems around the world, these lakes are strained by anthropogenic stressors, leading to degradation
of these biolo...
Rapid population and economic growth, increased health benefits of aquatic food, and changes in lifestyles and preferences as a result of rapid urbanization and globalization are all contributing to the rapid growth of aquaculture production in Kenya. Despite significant investment efforts from the national and devolved governments as well as donor...
For many Kenyans, the aquaculture business provides a vital source of food and work. However, information on Kenya’s aquaculture sector’s resilience in the face of emerging global shocks such as the COVID-19 pandemic requires additional examination. Prior to the epidemic, Kenya’s aquaculture industry had grown from a tiny participant to a critical...
This study examines the impacts of the Covid-19 pandemic and adaptive strategies to build resilience among stakeholders and actors in the aquaculture value chain in Kenya. Prior to the pandemic, Kenya's aquaculture sector had progressed from a minor player to a key component of the country's fish food system. Fish and fishery products have become t...
In Kenya, breeding programmes whose source of genetic material is local water bodies are at inception with the National Aquaculture Research Center, Sagana being the Nile tilapia and African catfish breeding nucleus. Fish are susceptible to a variety of infections and diseases. These microorganisms are often present on the external surfaces and vis...
Nile tilapia (Oreochromis niloticus) is one of the most farmed fish globally, with a significant contribution improving local livelihoods, especially in developing countries. Nile tilapia was first cultured in Kenya in 1924 and is the most cultured fish species. Annually, O. niloticus accounts for 62% (∼15,000 tonnes) of total aquaculture productio...
African catfish is one of the aquaculture species in Kenya and a potential source of cheap protein for human nutrition. However, the major hindrance in the culture of catfish is seed production. The high-mortality rate of fry and fingerlings experienced by hatchery operators has limited the access and availability of catfish seeds. This had resulte...
African catfish is one of the aquaculture species in Kenya and a potential source of cheap protein for human nutrition. However, the major hindrance in the culture of catfish is seed production. The high-mortality rate of fry and fingerlings experienced by hatchery operators has limited the access and availability of catfish seeds. This had resulte...
The dwindling capture fisheries has triggered an increase in Kenya's annual fish demand deficit, currently estimated at 553,000 MT. With the adoption of sustainable policies, aquaculture can bridge and surpass this deficit. Kenya's fish farming environment is however characterized by its highly fragmented production farms, which limit the dynamism...
Rastrineobola argentea (omena) is the second most important species in the fisheries of Lake Victoria after Nile perch. However, its fisheries have negative impacts on the ecology of the lake especially because of the high numbers and diversity of bycatch resulting from the fishery. This study conducted a rapid assessment in Dunga beach in Kisumu,...
Populations of large wildlife have declined in many landscapes around the world, and have been replaced or displaced by livestock. The consequences of these changes on the transfer of organic matter (OM) and nutrients from terrestrial to aquatic ecosystems are not well understood. We used behavioural data, excretion and egestion rates and C: N: P s...
This paper presents estimates of loading rates of organic matter, carbon, nitrogen and phosphorus by livestock (cattle) into aquatic ecosystems. These estimates have been compared with existing rates for the common hippopotamus in a river system where the distribution of the two (livestock and hippos) overlap.
This paper reviewed food and feeding habits of six Synodontis species in the African freshwaters and determined diet with respect to
size (ontogenetic shift) and season. The variety of food substances found in the stomach of various Synodontis species from different African
waters showed that the species are omnivorous feeders as the diet covers a...