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582 publications foundShowing 271–280 of 582
TECHNICAL REPORTS · NaFIRRI · 2007Fisheries Management and Conservation
Investigation of the Present Factors Affecting the Population Characteristics and Relative Abundance of Nile Perch (Lates Niloticus) at Selected Trawling Sites of Western Part of Lake Victoria-Uganda, Kagegi Gulf
This report is based on the investigation of the factors
affecting population characteristics and relative abundance
of Nile perch in selected sites of Kagegi Gulf Lake
Victoria Uganda in the month of November 2006. Nine (9)
stations were sampled at depth strata of 0-10, 10-20,
and 30-40 m the mean catch rates were 20-30 as follows;4 . 77 + 2.3, 8.75+5.5,
6.33+0.3 and 1.34+1.1 tonnes per square kilometer respectively. The catch rates differed at various depth levels with p-value of 0.2940 at 5% level of significance.
Limnological parameters were temperature 25.15+0.28,
23.68+0.20, 24.74+0.13 and 25.3+0.20°C; pH of 8.0+0.00,
7.7 + 0.11, 7.66 + 0.33 and 6.32j^0.14, dissolved oxygen
7.37+0.24, 6.44+0.30, 6.32+0.14 and 6.22+0.14 mg/1; Total
nitrogen 589.82+97.2, 514.34+68.8, 690.44+257.8 and
809.03+45.02pgL-respecLively with a p-value of 0.4392 at 5% level of significance. Prey type of Nile perch indicated
65.2% of haplochromine in 0-10 m depth and other strata >10
metre were dominated by Caridina nilotica.
Generally investigations indicated that the catch rates of
Nile perch at Kagegi gulf in various depth strata probably
depended on both the physical and chemical parameters
mentioned above.
THESES AND DISSERTATIONS · NARL · 2007Agricultural Marketing
Market Access and Agricultural Production: The Case of Banana Production in Uganda
Fredrick Bagamba This study investigates the effects of factor and commodity markets on the development of
the banana sub-sector in central and southwestern Uganda. The study analyses smallholder
household response to production constraints (crop pests a…
THESES AND DISSERTATIONS · NaCRRI · 2007Entomology
Role of Intercropping and Associated Grasses on Occurrence of Lepidopteran Stem Borera and their Natural Enemies on Maize
Dennis Gayi The study was conducted in 2012 and 2013 in Kiryandongo district, western Uganda in Bweyale
and Diika sub counties. Study sites were selected basing on cropping system and proximity to a
grassland with wild grass species within a radius …
THESES AND DISSERTATIONS · NaCRRI · 2007Entomology
The Distribution, Biology and Behaviour of Major Natural Enemies of Bemisia tabaci (Gennadius) (Homoptera Aleyrodidae) on Cassava (Manihot Esculenta Crantz) in Uganda
Michael Hilary Otim The whitefly, Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) is an important pest of
cassava (Manihot esculenta Crantz) causing substantial yield losses due to transmission of
cassava mosaic geminiviruses that cause cassava mosaic d…
