Robert Kagali

Jomo Kenyatta University of Agriculture and Technology | JKUAT · Department of Zoology

We evaluated the effect of probiotics on the growth and culture condition of rotifer in medium‐sized culture tanks. The influence of probiotics on the changes in swimming patterns, velocity and sinuosity indices of rotifer was also examined. The rotifers (Brachionus rotundiformis) were cultured for 14 days in nine polycarbonate tanks containing sea...

Modern technologies such as aquaponic system should be embraced to capitalize on fish and crop production. pumice, charcoal and a homogeneous mixture of (pumice and charcoal) were used as substrates and assessed on a control (aeroponic) for their suitability in nutrients removal from water for C. gariepinus culture and S. oleracea propagation under...

Cost of fish production can be reduced by replacement of high-priced fishmeal (FM) with insects sourced ingredients. Four months feed experiment was conducted at a fish farm in Baringo County, Kenya to investigate effects of substituting fishmeal (FM) with black soldier fly larvae meal (BSFLM) on survival and growth performance of C. gariepinus und...

Condensed suspension of live microalga cells, for example, Chlorella vulgaris, Nannochloropsis oculata and Tetraselmis tetrathele is often utilized as diets for mass production of live food resources, that is, rotifers, copepods, cladocerans and Artemia. These live food resources are essential for fish larviculture in hatcheries. However, the produ...

Total community 16S rDNA was used to determine the diversity and composition of bacteria and archaea within lakes Olbolosat and Oloiden in Kenya. The V3-V4 hypervariable region of the 16S rRNA gene was targeted since it's highly conserved and has a higher resolution for lower rank taxa. High throughput sequencing was performed on 15 samples obtaine...

The application of probiotics has varying effects on rotifer culture. These effects can either be directly on their growth and reproduction or indirectly by affecting the culture environment. The role played by specific probiotic candidates is still indistinct and further research is required to ascertain their significance in rotifer culture. In t...

We evaluated the suitability of fish waste diet (FWD) for culturing the minute rotifer Proales similis through the observation of their population growth and particle size selective feeding. A total of five treatments either with Nannochloropsis oculata or FWD (0.75 and 0.50 g/L) or the combination of N. oculata and FWD were set up in triplicates....

Application of Fungi for effective removal of hydrocarbon contamination from soil is being considered as the better option when it comes to biodegradation. Other method like physical and chemical bioremediation leads to production of toxic compounds and these methods are not cost effective. In the present study, soil samples from four different oil...

The importance of Amaranth as a valuable source of food, medicine and income has been documented. In the recent past, the cultivation of Amaranth by small scale farmers in Kenya have been promoted by public extension services, Non-Governmental Organizations (NGOs), research organizations and universities. The extent of influence of access to extens...

Purpose: The focus of this research was to identify pests and natural enemies of amaranth as well as quantify the losses as a result of these pests. Materials and Methods: Surveys of insect pests were done on randomly selected farms of farmers who were growing amaranth in Meru County between April 2012 and April 2013. The insects were collected by...