Three studies were conducted. In Study 1, paragrass (Brachiaria mutica) was processed and used as substrate for vermicomposting in outdoor beds with 1 kg/m² of the composting earthworm, ''African night crawler'' (Eudrilus eugeniae) or ANC. After 30 days, 41.8 kg of processed vermicompost (VC) with 18% moisture and 2.2 kg of ANC biomass was obtained per m² of bed. The cost of producing the VC was PhP 2.50 (US$0.06)/kg based on direct expenses only. In Study 2, the VC was tested as an organic fertilizer for Nile tilapia (Oreochromis niloticus) culture in freshwater ponds. The effects of two application rates of VC (2.5 t/ha and 5 t/ha) were determined. Sex-reversed tilapia fingerlings were stocked at 2/m² and cultured for 120 days. The results showed that the net yield of marketable-size fish was significantly higher with VC at 2.5 t/ha compared to those with 5 t/ha and the control. The cost of producing the fish was lowest with VC at 2.5 t/ha. No off-flavor of the fish was detected in a simple organoleptic test. In Study 3, only VC at 2.5 t/ha was applied for the first 60 days of culture in the ponds stocked with tilapia fingerlings at 1/m². Processed earthworm biomass (EB) was tested as an animal protein source in the moist feeds (85% fine rice bran and 15% EB) fed to the tilapia fingerlings in the next 60 days of culture. The highest net yield of fish was obtained with the feeding of fermented moist feed compared to those of the fish fed with the fresh moist feed and that of the fish in the ponds with VC fertilization only for the entire 120-day period. The cost of production of the fish was lowest with the feeding of the fermented moist feed. There was no apparent difference between the fresh moist feed and the fermented one.

Research morphometric characters of O. vittatus conducted in 2014 in the waters of Singkarak Lake Solok Regency, the waters Antokan River Agam Regency and Koto Panjang Reservoir Lima Puluh Kota Regency, West Sumatra Province-Indonesia. The purpose of research is to analyze the morphometric characters, the main differentiating factor, determination of inter grouping of O. vittatus populations. Results showed that the average standard length of O. vittatus population in Singkarak Lake are 117.00±15.67 mm Antokan River are 139.67±13.16 mm and Koto Panjang Reservoir are 169.49±24.37 mm. The morphometric characteristics of fish population between habitats of O. vittatus proved significantly different (p<0,05). Character of the fish populations of O. vittatus of Singkarak Lake with a population of Antokan River as many as five different characters (25%), the character of the population morphometric O. vittatus of Singkarak Lake and populations Koto Panjang Reservoir as much as 16 different characters (80%), while the fish populations of O. vittatus of Antokan River and Koto Panjang Reservoir as much as 15 different characters (75%). The main differentiator of 20 morphometric characters are truss the tip of dorsal fin - the tip of the anal fin (C5) and truss the tip of upper mouth - the base of the dorsal fin (A4). O. vittatus populations are geographically separated from each habitat and genetic distance O. vittatus populations in waters Singkarak Lake closer with a population of Antokan River.

The aim the research is to increase the reproductive potential of H.nemerus female that is time matured gonads, somatic ovi index, fecundity, egg diameter, hatching rate and time to hatching in the control group (injection 0.9 NaCl) and exposed to 200 µg/kg, 400 µg/kg, 600 µg/kg body weight of 17ß-estradiol. Treatment of 17ß-estradiol levels were significant (p<0.05) different with respect to time ripe gonads, ovi somatic index, fecundity and egg diameter. Females exposed to 400 µg/kg body weight of 17ß-estradiol can increased time matured gonads 28 days, somatic ovi index 10.32%, absolute fecundity 63,724 egss/spaw, relatif fecundity 90 eggs/ g gonado weight and egg diameter 1.22 mm. But hatching rate and time to hatching did not differ between the treatments (p>0,05).

Bagrus docmak, locally known as Ssemutundu, is one of the native catfishes of Uganda occurring in lakes Albert, Edward, Kyoga and Victoria; and rivers Kagera and the Victoria Nile. The species is a high value food fish that has been targeted for domestication, a process that requires definition of the different strains/taxa of the species. We investigated the morphological variations based on 22 morphological characters in an attempt to identify the different strains of B. docmak and define the species’ morphological phylogenetics in Uganda’s major water bodies. Morphometric data taken from 372 samples was analysed using multivariate methods in an attempt to establish the morphological phylogenetics relationships within and among the different geographical populations. A scatter diagram based on the two most significant components and a multidimensional scaling plot (MDS) based on Euclidean similarity measure clustered the B. docmak from Uganda’s major water bodies into two groups. One group exclusively contained the Victoria Nile individuals whereas the second group contained the rest of the samples. These two groups require further studying for they may require different management approaches and may have different potential aquaculture traits. The findings are discussed in such a way as to emphasise revival, domestication, culture and sustainable exploitation of the Ssemutundu fishery in the country.