A longitudinal study on Anopheles mosquito larval abundance in distinct geographical and environmental settings in western Kenya

Table 1 The abundance of early and late anopheline larvae in different habitat types in Fort Ternan, Lunyerere and Nyalenda during the two years of weekly sampling

Site name	Habitat type	Habitat stability	Weekly sampling (%)	Early instars			Late instars
				(EMM ± SE)	OR	P	(EMM ± SE)	OR	P
Fort Ternan	Rain pools	Temporary	4.4	0.060 ± 0.019	1		0.037 ± 0.009	1
	Drainage canal	Permanent	14	0.036 ± 0.012	0.666	0.054**	0.036 ± 0.006	0.976	0.918
	Erosion pit	Permanent	17.7	0.102 ± 0.009	1.390	0.090	0.040 ± 0.004	0.913	0.676
	Hoof print	Temporary	13.6	0.131 ± 0.013	1.991	0.001*	0.069 ± 0.006	1.753	0.007*
	River fringe	Permanent	11.1	0.060 ± 0.019	0.641	0.052**	0.024 ± 0.006	0.412	0.002*
	Taps	Permanent	25.9	0.043 ± 0.010	0.431	0.000*	0.020 ± 0.005	0.325	0.000*
	Tire track	Temporary	13.4	0.052 ± 0.013	0.896	0.690	0.028 ± 0.006	0.797	0.327
Lunyerere	Rain pools	Temporary	1.5	0.124 ± 0.056	1		0.035 ± 0.023	1
	Drainage canal	Permanent	89.2	0.167 ± 0.007	1.134	0.648	0.062 ± 0.003	1.249	0.535
	Erosion pit	Permanent	6.7	0.129 ± 0.027	1.019	0.956	0.046 ± 0.011	1.214	0.635
	Hoof print	Temporary	2.5	0.014 ± 0.044	0.234	0.069	0.006 ± 0.018	0.133	0.022*
	Container	Temporary	0.2	0.020 ± 0.176	1.000	-	0.012 ± 0.072	1.000	-
Nyalenda	Rain pools	Temporary	2.3	0.058 ± 0.033	1		0.002 ± 0.007	1
	Drainage canal	Permanent	56.1	0.076 ± 0.11	1.624	0.255	0.014 ± 0.002	2.118	0.195
	Hoof print	Temporary	1.1	0.042 ± 0.047	0.692	0.488	0.000 ± 0.010	0.446	0.312
	Rice paddy	Temporary	39.5	0.135 ± 0.013	2.586	0.026*	0.014 ± 0.003	3.164	0.048*
	Burrow pit	Permanent	1.0	0.366 ± 0.48	7.302	0.003*	0.038 ± 0.010	7.781	0.010*

*Significantly different from rain pools **marginally significant from rain pools at P = 0.05, OR = Odds ratio; P = level of significance; EMM = estimated marginal means; SE = standard error of the mean

ISSN: 1475-2875