High ammonia levels in enclosed fish production systems negatively impact growth and hinder optimum production. The objective of this study was to evaluate the (i) biofiltration potential chia (Salvia hispanica) lemon grass (Cymbopogon citratus) (ii) influence plant filters on water quality an aquaponic system. Treatments included a control-without plants, S. hispanica, C. citratus systems. conducted for 3 months Aqualife farm, Machakos, Kenya. Water parameters, performance plants were...

Abstract Land‐use changes in the upper reaches of M ara R iver Basin have modified their biophysical and hydrological processes, resulting water quality degradation streams. This study was conducted to investigate effects human activities on macroinvertebrates along Nyangores River, one main tributaries iver, K enya. Seven sampling sites were chosen correspond loss riparian cover, livestock watering (e.g. laundry washing, bathing, cultivation, wastewater inputs, dumping solid wastes from...

In aquaponic systems, plants absorb dissolved nutrients from aquaculture wastewater for their growth. The removal of allows reuse water and minimises discharge to the surrounding environment. This study evaluated relative nutrient efficiencies three plant species performance Nile tilapia (Oreochromis niloticus) in a small-scale system. Three systems were assigned as treatments PU (pumpkin), SW (sweet wormwood) AM (amaranth). Physical-chemical quality parameters measured fish tanks well...

Abstract Lake Victoria is the second largest freshwater lake in world that was once a biodiversity hotspot hosting over 500 endemic haplochromine cichlids were later decimated by exotic introductions and anthropogenically driven environmental ecological changes. The changes years have been attributed to overfishing, eutrophication, introduction of species, pollution possibly climate change. lake's capture fishery, which main economic activity directly indirectly supporting 40 million people,...

A parasitological study carried out in May 2022 and March 2023 the Nyando River of Lake Victoria Basin, Kenya, disclosed two parasitic lernaeid copepods: Lamproglena cleopatra Humes, 1957, from gills a cyprinid, Ningu Labeo victorianus Boulenger, 1901, endemic to drainage system, clariae Fryer, clariid, North African catfish Clarias gariepinus (Burchell, 1822). The copepods were studied supplementary taxonomic information was presented using scanning electron micrographs genetic data....

The maintenance of optimal water quality for fish production is one the major challenges in aquaculture. Aquaponic systems can improve by removing undesirable wastes and turn produce a second marketable crop. However, there no information on growth nutrient removal capability Artemisia annua aquaponic systems. This study evaluated effect plant density quality, A. Oreochromis niloticus small scale system Kenya. consisted three treatments representing different densities (D1: 48 plants/m2, D2:...

Aquatic ecosystem health assessment is critical for early detection of disturbances and water habitat degradation. This study assessed the ecological status two urban rivers as well a wastewater sedimentation pond in Kisumu City, Kenya using physico-chemical quality parameters African catfish, Clarias gariepinus somatic indices. Site association indices was derived from Principal Component Analysis (PCA) whereas relationship between examined by Redundancy Ordination (RDA). PCA results...

Aquaponic systems use plants` natural ability to absorb nutrients from aquaculture wastewater. This improves water quality for fish and promotes plant growth, resulting in a sustainable efficient food production method. However, the nutrient removal capacity of many species within aquaponics remains underexplored. study investigated potential three species: sweet wormwood (Artemisia annua), pumpkin (Cucurbita pepo) amaranth (Amaranthus dubius) biofiltration media-based aquaponic system. In...

Abstract Lake Baringo is a Ramsar‐designated water body facing myriad environmental challenges attributable to anthropogenic activities, thereby being an ecosystem under perturbation. At the same time, however, it important aquatic resource not only local community, but also international arena because of its rich biodiversity. It supports artisanal fishery with four major fish economic importance, including Oreochromis niloticus , Protopterus aethiopicus Clarias gariepinus and Barbus...

Length-weight relationships (LWRs) and condition factors are important for effective management of riverine fisheries.This study investigated the LWRs dominant fish species from Nyangweta tributary River Kuja, in Lake Victoria Catchment, Kenya.A total 615 seven were analyzed: Enteromius altianalis, neumeyeri, Clarias theodorae, Labeo victorianus, Labeobarbus altianialis, Chiloglanis Amphilias jacksonii.The sampled five locations October 2020 to March 2021.The length weight measurements taken...

Abstract Aquaculture, being the fastest growing food sector, is expected to provide highly needed animal protein for about 9.7 billion people globally by 2050. The world population likely consume 178 million tons of fish/aquatic animals 2028, whereby 58% fish will be from aquaculture. Growth production increase overall aquafeeds over 87 2025. Aquafeed relies largely on fishmeal which getting expensive due its multiple use and scarcity. A remedy this situation non-conventional sources, may...

Aims: To determine the spatial variation in physico-chemical water quality attributes estuarine ecosystems of South Coast Kenya to inform its management. Study Design: We employed diagnostic research design where such factors as anthropogenic activities, hydrology, and accessibility were considered choosing 12 sampling stations. A mixed (probability non-probability) was used sample. Place Duration Study: Four discharging rivers into system with a reference point identified. points earmarked...

Estuarine ecosystems are classified as among the most productive systems on planet earth supporting an array of biodiversity. However, due to ever increasing human population, they experience environmental degradation originating from intensive anthropogenic activities hence need for regular assessment and monitoring inform its management. The purpose this study, therefore, was analyze spatio-temporal variation in water quality parameters South Coast estuarine ecosystem, Kenya. Twelve...

A study was conducted with an objective of determing the spatial and temporal distribution, abundance diversity plankton along a salinity gradient in Lakes Naivasha Oloiden. The phytoplankton some physico-chemical parameters were sampled monthly for one year (August, 2020 to July, 2021). Identification counting done under compound microscope studied using indices. Salinity higher Lake Oloiden sites it associated negatively abundance. Thirty-two species identified they belonged families:...

This study investigated the influence of human activities on water quality parameters in Molo River, one major inflow rivers Lake Baringo. Monthly measurements physical and chemical were conducted for six months (February-July 2023) at sampling stations established along river to represent areas with different activities. Analysis variance was used test significant differences among stations. The results revealed downstream increases (p < 0.05) temperature, electrical conductivity, pH,...

Summary Most recirculation aquaculture systems (RAS) use aerated biofilters to maintain suitable water quality for fish production. However, application of non-aerated may provide opportunities lower aeration costs, usage and concentration all nitrogenous wastes in the effluent water. Our study aimed at comparing biofiltration performance characteristics two biofilters: a conventional biofilter receiving same from small-scale RAS. The were evaluated triplicate tested concurrently seven...