Jonathan Munguti

Kenya Marine and Fisheries Research Institute (KMFRI) · Aquaculture

In this study, proximate body composition, fillets fatty acid and sensory properties of Nile tilapia fed on oilseed meals with crude papain enzyme were determined. A control diet (D1) of 300g/kg crude protein (CP) and (2900Kcal/kg) was formulated using fishmeal (Rastrionaebola argentea) (FM) and test diets by replacing 10% CP of FM by soybean meal...

Aquaponics incorporates aquaculture with hydroponics, whose principles and operations largely remain untested. Currently, there is a knowledge gap on the performance of aquaponic systems used for fish production under different stocking densities. This may hinder adoption and generally retard the development of aquaponic culture systems for fish an...

This study investigated the effects of substituting varying levels of a plant protein mixture (PPM) with freshwater shrimp meal (FSM) on growth, digestibility, and economic returns of Nile tilapia. Monosex male Oreochromis niloticus fingerlings (initial body weight, 28 ±0.01 g) were cultured in cages installed in an earthen pond and tanks for 180 a...

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 producti...

Background: Aquaculture is one of the critical sectors contributing to food and nutrition security, income and employment opportunities to millions of people, and is currently the fastest growing food-producing sector globally. With the global increase in aquaculture production, focus on biosecurity and fish health management is becoming increasing...

Climate change is the greatest environmental threat while the rapidly developing aquaculture sector is an anthropogenic activity that results into the emissions of greenhouse gases. However, despite the threat from climate change, aquaculture is becoming more eminent in food production systems, where it stands to guarantee high fish production. The...

Kenya's inland and marine waters harbor exceptional high biodiversity and provide critical ecosystem goods and services to the riparian communities, ranging from drinking water, flood protection, water filtration, carbon storage, food supplies, tourism, and healthy well-being. However, these vital ecosystems and livelihood support systems are threa...

This datasheet on L'élevage en cage à faible niveau d'intrants: vers la sécurité alimentaire et l'amélioration du niveau de vie en zones rurales au Kenya covers Identity, Overview, Further Information.

As capture fishery sector continues to decline, aquaculture industry must be accelerated to bridge the fish supply gap especially in the developing countries. However, in most developing countries, aquaculture sector is characterized by low productivity due to inefficient technologies, hence the need for innovative aqua-technologies that can stimul...

In Sub-Saharan Africa, Nile tilapia (Oreochromis niloticus L.) make up over 80% of aquaculture production. However, the local aquaculture farmers are restricted by the unavailability and expensive cost of formulated rations. To reduce reliance on the scarce and expensive fishmeal used in fish feeds, alternative insect protein has been successfully...

A 72-day feeding trial was conducted at Sagana fish farm to assess the effects of substitution of fish meal (FM) with black soldier fly larvae meal (BSFLM) on the growth performance and survival rates of Nile tilapia. Four test diets were formulated and substitution of FM by BSFLM made at 0%, 33%, 67% and 100%. 240 male Nile tilapia (52.3 ± 0.29 g)...

The aquaculture subsector is important in Kenya for food and nutritional security. The rapid growth of the subsector is evident especially in the widespread culture of Nile tilapia (Oreochromis niloticus); however, the gains made in the industry may be curtailed by inadequate quality seed. Currently, hatcheries are plagued by inbreeding, hybridizat...

inadequate training of personnel who can tackle fast-evolving production systems and technologies geared towards sustainable aquaculture development has hampered the growth of the sector. Currently, the general aquaculture training landscape in Kenya and curricula are fragmented, do not meet labour market needs and are partially duplicative and som...

Feeds and feed management practices are key to the development of the aquaculture sector. To achieve high levels of aquaculture production, fish farmers need nutritionally adequate and cost-effective feeds, which are coupled with good feed management practices. Access to high quality and cost-effective feeds is one of the prerequisites to successfu...

This study was conducted to evaluate the chemical composition, enzymatic activity and optimum crude papain level incorporation in plant protein based diets for Nile tilapia. The crude papain extract (CPE) was collected from unripe paw paw fruits and enzymatic activity determined by tyrosine method. The CPE was used to assay In vitro relative protei...

Training of trainers (ToT) on KMFRI Fish value added products, reaching out to communities for empowerment

Aquaculture is one of the critical sectors contributing to food and nutrition security, income and employment opportunities to millions of people and is currently the fastest growing food-producing sector globally. With the global increase in aquaculture production, focus on biosecurity and fish health management is becoming increasingly important...

This article reviews critical aspects of the aquafeed value chain in the Kenyan aquaculture sector. Aquaculture production in Kenya has grown steadily in recent years, to more than 18,000 tons in 2019. Due to the growing demand for fish and fish products, there has been a gradual shift from extensive to semi-intensive to moderately intensive aquacu...

Profitability is key in fish farming, just as it is to any other enterprise. For the farmers to actualize high-profit margins, it is imperative to have access to well-balanced nutritive and cost-effective feeds, backed by sound on-farm feed management practices. This paper auditsKenya’sfish feed industry and the on-going on-farm feed management pra...

A cross-sectional study was undertaken to examine the aquaculture extension service in Kenya. Primary data was collected using a semi-structured questionnaire administered to 292 randomly selected fish farmers and 56 extension officers in different counties in Kenya. Descriptive statistics mainly mean and frequencies were computed to determine key...

Dietary composition of aquaculture feeds (aquafeeds) determines the quality of wastes from aquaculture production systems. These wastes, which are derived mainly from nitrogenous and phosphorus compounds subsequently affect water quality in the culture systems and the ambient environment. Depending on the type of culture systems and management prac...

Profitability is key in fish farming, just as it is to any other enterprise. For the farmers to actualize high-profit margins, it is imperative to have access to well-balanced nutritive and cost-effective feeds, backed by sound on-farm feed management practices. This paper audits Kenya's fish feed industry and the ongoing on-farm feed management pr...

This article reviews critical aspects of the aquafeed value chain in the Kenyan aquaculture sector. Aquaculture production in Kenya has grown steadily in recent years, to more than 18,000 tons in 2019. Due to the growing demand for fish and fish products, there has been a gradual shift from extensive to semi-intensive to moderately intensive aquacu...

Dietary composition of aquaculture feeds (aquafeeds) determines the quality of wastes from aquaculture production systems. These wastes, which are derived mainly from nitrogenous and phosphorus compounds subsequently affect water quality in the culture systems and the ambient environment. Depending on the type of culture systems and management prac...

Nile tilapia (Oreochromis niloticus) culture has been faced by challenges of prolific breeding and early maturity of mixed-sex tilapia that can be solved by the culture of all-male tilapia. A study was conducted to compare the growth performance, survival and condition factor of genetically male tilapia (GMT), sex-reversed tilapia (SRT) and mixed-s...

Considering price as the main limiting factor in the use of animal proteins, this study evaluated the protein quality of diets for Nile tilapia containing oilseed meals as replacements of fishmeal. A control diet (FMBD) (30% crude protein and 2900 Kcal DE/kg) was formulated using fishmeal (FM), soybean meal (SBM), canola meal (CM) and sunflower mea...

In Africa, many governments and development agencies have promoted aquaculture as a panacea for household food security, rural development, and poverty reduction. However, aquaculture production in the continent remains low despite significant investments in research and technology development. While numerous initiatives have been directed at techn...

Development of Technologies for Improving Productivity of Aquaculture in Kenya (DTIPAK)

This study examined the market linkages and distribution channels of cultured, captured and imported fish in Kenya. A total of 113 fish traders' questionnaires and 10 key informant interviews were administered. Secondary data from published and unpublished records were used to complement primary data. Fish traders were literate enough to express th...

enya is endowed with a vast network of aquatic resources comprising freshwater lakes and rivers and an extensive ocean resource base. The physical potential is virtually unlimited—inland water resources cover an area of 18,029 km2, marine water area (including the EEZ) 142,400 km2 and a continental coastline of 640 km—that supports diverse fish pro...

Cage culture has been proposed as an option to solve the problem of excessive recruitment and stunting in mixed sex Nile tilapia culture. An experiment was set up in a completely randomized design (CRD) for 4 months to assess the growth performance of mixed sex Nile tilapia in monoculture, biculture, and polyculture with African catfish (Clarias ga...

A total of 52 samples of finished fish feeds and ingredients were collected from smallholder farmers in Kenya, Tanzania, Rwanda and Uganda, and analyzed. Culture and molecular techniques were used to identify fungal isolates from the feedstock, and mycotoxin profiles were determined using liquid chromatography–tandem mass spectrometry. The most pre...

This study investigated sunflower seed meal (SSM) as dietary protein replacement of fish meal (FM) for Nile tilapia (Oreochromis niloticus) juveniles (initial mean weight of 19.8 ± 6.3 g) reared in earthen ponds for 210 days. SSM replaced 25%, 50%, 75%, and 100% (i.e., D25, D50, D75, and D100, respectively) of FM in an isonitrogenous and isocaloric...

Contamination of the minnow Rastrineobola argenta, through handling at landing sites and retail markets around Lake Victoria P.O. Okemo, P.A. Aloo, D.M. Mukwabi, J.J. Jumbe, A.W. Sifuna, J. Munguti, M. Mokua Abstract Background: The quality of fish could be a challenge both locally and internationally as microbial contaminants may result in infec...

Food insecurity remains one of the most visible dimensions of poverty. The increasing population amid competition for land and water resources means that the global demand for food will continue to increase. In Kenya, the food insecurity trend is worrying as the population is expected to hit 55 million by 2020 against an annually declining arable l...

This study was conducted to compare the growth performance and survival of three strains of African catfish (Clarias gariepinus) cultured in Kenya. Three strains originally from the Netherlands (Dutch), Indonesia, and Kenya, (Lake Victoria) were studied. C. gariepinus having an average initial body length of 3.87 cm and weight of 0.51 g were stocke...

This study was conducted during a fish eating campaign to determine the preference of fish and fish value added products in Makueni County. The data is important for advising fish farmers, traders, processors and policy makers in the aquaculture value chain. The data was obtained by randomly administering questionnaires to respondents who were serv...

p>A 100 days experiment was conducted to determine the effect of feeding blood meal (BM) as a replacement of fish meal (FM), as the main source of animal protein, on growth rate and economic performance of Nile tilapia in fertilized pond. Three isonitrogenous diets (35% crude protein) were formulated using either FM as the main source of animal pro...

The effect of photoperiod (24L:00D, 12L:12D, and 00L:24D) and temperature (22 ± 1°C and 28 ± 1°C) on performance of Clarias gariepinus larvae was tested. Larvae weighing 3.2 ± 0.24 mg were cultured in aquaria at a stocking density of 20 fish L−1 and fed twice a day on catfish starter diet (40% CP) at 10 % BW day−1. Highest mean weight gain (31.00 m...

We investigated the efficacy of Nicotina tobacum as an anti-parasitic chemical to freshwater leeches of the genus Hirudinea, by assessing their behavioral and survival responses to different concentrations and ages of N. tobacum (i.e. 2.5, 5.0, 7.5, 10.0, 12.5, 15.0, 17.5 and 20.0 g L -1) at 25±1oC. We observed longer escape time from freshly prepa...

This study examined the efficacy of community-level fishery co-management organizations called Beach Management Units (BMUs) along the Kenyan shores of Lake Victoria. BMUs were established to enhance sustainable Lake Victoria fishery management through increasing the level of community participation to assist in the administration of fisheries rule...

Comparative growth performance of male monosex and mixed sex Nile tilapia (Oreochromis niloticus) was conducted in six earthen ponds each measuring 150 m2 at the Kenya Marine & Fisheries Research Institute (KMFRI), Kegati Aquaculture Research Station. Male monosex and mixed sex of O. niloticus juveniles at an average weight of 12.2 ± 0.02 g and ave...

This study examined the efficacy of community-level fishery co-management organizations called Beach Management Units (BMUs) along the Kenyan shores of Lake Victoria. BMUs were established to enhance sustainable Lake Victoria fishery management through increasing the level of community participation to assist in the administration of fisheries rule...

The rapid growth in aquaculture has triggered new technological advancement such as periphyton based aquaculture. Periphyton is comprised of groups of algae, filamentous bacteria etc. This technology works on the basis of introduction of substrates into the water to support the growth of periphyton, which becomes food for fish. Periphyton also puri...

The aim of the study was to assess the main and interactive effects of greenhouse and dietary crude protein levels on growth, behavior and fecundity of Nile tilapia at Kegati aquaculture research station, Kisii, Kenya from July to August, 2012. Mixed sex tilapia broodtock (251.76±1.57g) were distributed at random among 12 hapa (1m3), 6 under greenh...

This study aimed at determining the length-weight relationship (LWR), condition factor (K) and length at first maturity of common carp (Cyprinus carpio) in Lake Naivasha, Kenya. The fish were sampled monthly using a gill net of mesh size between 1.5 to 5 inches. The lake was accessed using an engine boat from November 2013 to February 2014. A total...

Tilapia culture is widely practiced in tropical and subtropical regions with an annual growth rate of 12% thanks to their high growth rate, disease resistance, and low trophic feeding levels. The increase of aquaculture production has doubled the demand for fishmeal, which has been the most preferred protein ingredient for decades. The provisio...

Nile tilapia (Oreochromis niloticus) fingerlings were reared in earthen ponds at three different feeding frequencies; twice daily, twice after 1 day, and twice after 2 days for a period of 7 months. Three hundred and seventy five fish were stocked into each of the nine, 150 m 2 ponds with three replicates for each treatment. The fish were fed with...

The rapid growth in aquaculture has triggered new technological advancement such as periphyton based aquaculture. Periphyton is comprised of groups of algae, filamentous bacteria etc. This technology works on the basis of introduction of substrates into the water to support the growth of periphyton, which becomes food for fish. Periphyton also p...

This study describes the length-weight relationships (LWR) and relative condition factor (K) of five fish species in Lake Baringo, Kenya. A total of 483 fishes consisting of Barbus intermedius, Clarias gariepinus, Labeo cylindricus, Oreochromis niloticus baringoensis and Protopterus aethiopicus were collected on monthly basis from Lake Baringo betw...

This study was conducted to evaluate the effects of pure and crude papain on the digestibility and utilization of diets containing hydrolysed feather meal (HFM) by Nile tilapia (Oreochromis niloticus L.) under indoor and outdoor conditions. O.niloticus fingerlings with a mean weight between 22 and 30g were stocked in aquaria and cages respectiv...

The profitability of commercial fish farming operation is of paramount importance to all farmers. However, farmers must have access to well-balanced and cost effective feeds coupled with optimal on-farm feed management practices as a prerequisite to profitable production. This paper presents an audit of the current status of the Kenyan fish feed...

The profitability of commercial fish farming operation is of paramount importance to all farmers. However, farmers must have access to well-balanced and cost effective feeds coupled with optimal on-farm feed management practices as a prerequisite to profitable production. This paper presents an audit of the current status of the Kenyan fish feed in...

The present study describes the Length-Weight Relationship (LWR) and condition factor (K) for 215 Oreochromis niloticus broodstock from Kegati Aquaculture Research Station, Kenya. The male broodstock (average length 18.3 ± 0.1 cm and weight 126.69 ± 0.2 g) and female broodstock (average length 15.18 ± 0.1 cm and weight 84.84 ± 0.06 g) were randomly...

The number of private and public hatcheries in Kenya has increased tremendously due to fingerlings shortage experienced at the launch of Fish Farming Enterprise Productivity Program (FFEPP) a move likely to compromise quality. This study aimed at assessing the management levels of hatcheries in Kirinyaga and Kisii Counties of Central and Western Ke...