Water Hyacinth’s Extent and Its Implication on Water Quality in Lake Victoria, Uganda

Table 3

Mean rating, standard deviation, and Pearson’s chi-square results showing the relationship between the water hyacinth determinants and landing site.

Factors	Mean rating	Standard deviation	Pearson value	Likelihood ratio	value
Morphology of the Bay	3.2	0.9	4.6	4.4	0.598
Strong winds	3.2	1.1	39.4	39.6	≤0.001
Water level changes	2.7	1.9	20.7	20.3	0.002
Speed of water currents	3.0	1.9	4.3	4.2	0.633
Hyacinth species genetics	1.4	0.7	4.7	4.4	0.580
Water depth	1.5	0.8	14.1	16.0	0.29
Biotic colonization	1.3	0.6	12.6	16.4	0.049
Temperature	1.2	0.4	0.8	1.2	0.935
Humidity	1.2	0.5	15.7	17.5	0.015
Discharge of effluent	3.2	0.9	13.5	11.3	0.35
Construction at the shore	2.5	1.1	23.7	24.5	≤0.001
Fish hatcheries	1.8	0.2	17.8	18.7	0.007
Proximity to botanic gardens	1.9	1.0	8.3	8.5	0.216
Fishing boats and nets	1.8	1.1	33.1	40.3	≤0.001
Herbaria	1.5	0.9	29.1	28.1	≤0.001
Ferry navigation	2.5	1.2	19.5	23.4	0.012