Table 4.

Associations between the proportional frequencies of the immatures of An. gambiae s.s. and An. arabiensis among sampling sites within a habitat and among larval breeding habitats as influenced by each physicochemical property of water during a category of rainfall in Banambani

Source	df	Young		Old		Total
		χ2	P	χ2	P	χ2	P
Alkalinity	1	-	-	0.70	0.404	0.45	0.503
Habitat	2			0.46	0.796	0.27	0.873
Site within a habitat	2			3.08	0.215	5.54	0.063
Category of rainfall	2			1.28	0.527	2.35	0.309
Conductivity	1	1.72	0.189	0.11	0.743	0.03	0.872
Habitat	2	2.68	0.262	0.01	0.993	0.28	0.869
Site within a habitat	2	7.63	0.022*	2.94	0.231	6.05	0.049*
Category of rainfall	2	1.70	0.427	1.32	0.518	2.59	0.273
Dissolved oxygen	1	-	-	1.00	0.317	1.75	0.186
Habitat	2			0.87	0.648	4.08	0.129
Site within a habitat	2			3.46	0.177	5.83	0.054
Category of rainfall	2			1.49	0.474	2.44	0.295
Nitrate	1	-	-	0.27	0.602	0.91	0.339
Habitat	2			0.11	0.946	1.28	0.526
Site within a habitat	2			2.20	0.333	4.91	0.086
Category of rainfall	2			1.25	0.536	1.89	0.389
Orthophosphate	1	1.33	0.249	2.34	0.126	2.00	0.157
Habitat	2	3.21	0.201	1.58	0.454	4.80	0.091
Site within a habitat	2	8.24	0.016*	0.88	0.645	4.38	0.112
Category of rainfall	2	0.68	0.713	1.38	0.501	2.48	0.289
pH	1	0.34	0.559	2.38	0.123	3.20	0.074
Habitat	2	1.08	0.583	0.30	0.861	1.34	0.511
Site within a habitat	2	7.71	0.021*	1.80	0.406	4.81	0.090
Category of rainfall	2	0.54	0.762	1.22	0.543	2.86	0.239
Temperature	1	-	-	1.14	0.287	3.47	0.063
Habitat	2			0.40	0.817	2.65	0.265
Site within a habitat	2			1.58	0.454	5.90	0.052
Category of rainfall	2			1.44	0.486	4.38	0.112
TDS	1	2.00	0.157	0.24	0.626	0.02	0.895
Habitat	2	2.93	0.231	0.05	0.977	0.33	0.849
Site within a habitat	2	7.61	0.022*	3.17	0.205	5.77	0.056
Category of rainfall	2	1.98	0.371	1.31	0.521	2.63	0.268
Turbidity	1	-	-	2.27	0.132	2.57	0.109
Habitat	2			2.10	0.350	1.71	0.425
Site within a habitat	2			0.26	0.878	2.91	0.234
Category of rainfall	2			1.61	0.448	2.65	0.266

* P < 0.05, "-" not applicable