Table 5. Mean densities ± SE (per site) and occurrences of anopheline larvae sampled from the lake and adjacent habitats, and from microhabitats categorized based on vegetation cover at each sampling site in 2009.
| Macrohabitats | Microhabitats | Total | ||||||
| Taxa | Lake (n = 233) | Pool (n = 149) | Water hyacinth (n = 68) | Short (n = 112) | Tall (n = 113) | Uncovered (n = 89) | Habitats (n = 382) | No. of larvae (%) (n = 6720) |
| An. funestus s.s. * | 0.1±0.0 (4) | 1.4±0.4 (26) | 1.2±0.7a (8) | 0.7±0.3b (10) | 0.5±0.2b (10) | <0.1c (2) | 0.6±0.2A (30) | 222 (3.3) |
| An. lessoni | <0.1 (1) | <0.1 (2) | <0.1 (1) | <0.1 (1) | <0.1 (1) | 0 (0) | <0.1 (3) | 3 (<0.1) |
| An. rivulorum * | 0.4±0.2 (15) | 0.3±0.1 (9) | 1.5±0.6a (11) | 0.1±0.1b (6) | 0.2±0.1b (6) | 0.1±0.1b (1) | 0.4±0.1A (24) | 145 (2.2) |
| An. arabiensis * | 1.2±0.3 (37) | 34.1±7.9 (71) | 1.4±0.8a (8)a | 6.4±2.1a (40)b | 0.2±0.1b (52)b | 51.0±12.7c (52)b | 14.1±3.2B (108) | 5368 (79.9) |
| An. gambiae s.s. | 0.1±0.0 (5) | 0.4±0.2 (8) | 0.1±0.1 (2) | 0.1±0.1 (5) | 0 (0) | 0.6±0.3 (6) | 0.2±0.1 (13) | 76 (1.1) |
| An. pharoensis | 0.2±0.1 (12) | 0.2±0.2 (3) | 0.2±0.2 (4) | 0.1±0.1 (4) | 0.1±0.0 (3) | 0.5±0.3 (4) | 0.2±0.1 (15) | 71 (1.1) |
| An. maculipalpis | <0.1 (1) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | <0.1 (1) | <0.1 (1) | 2 (<0.1) |
| An. coustani s.l. | 2.5±0.4 (72) | 1.7±0.4 (40) | 3.5±1.0 (22) | 2.3±0.5 (41) | 2.7±0.6 (44) | 0.3±0.2 (5) | 2.2±0.3 (112) | 833 (12.4) |
The number in parentheses after the density value indicates positive sites. The values with the same letter were not statistically significant (P>0.05). Where letters are missing on densities, the count portion was excluded from the optimal zero-inflated regression model or hurdle model. Similarly, the binomial portion was excluded where letters are missing on the numbers of positive sites.
*
Species included in the analyses.