Table 3.
Parameter estimates for the negative binomial models explaining the abundance of selected Phlebotomine sand fly species in Trinidad de Las Minas, Capira, Panamá
| Parameter | Species | Proportional abundance change | Estimate | S.E. | z | Pr(>|z|) |
|---|---|---|---|---|---|---|
| Domicile |
Lutzomyia trapidoi |
1 (563) ¶ |
6.333 |
0.794 |
7.980 |
<0.00001x |
|
Lu. gomezi |
1 (38) ¶ |
3.647 |
0.220 |
16.586 |
<0.00001x |
|
|
Lu. panamensis |
1 (7) ¶ |
2.010 |
0.212 |
9.467 |
<0.00001x |
|
|
Lu. triramula |
1 (5) ¶ |
1.646 |
0.328 |
5.015 |
<0.00001x |
|
|
Lu. dysponeta |
1 (16) ¶ |
2.752 |
0.745 |
3.694 |
0.000221x |
|
| Peridomicile |
Lu. trapidoi |
0.52 |
−0.646 |
0.306 |
−2.108 |
0.0350x |
|
Lu. gomezi |
0.58 |
−0.551 |
0.278 |
−2 |
0.0454x |
|
|
Lu. panamensis |
3.52 |
1.258 |
0.258 |
4.886 |
<0.00001x |
|
|
Lu. triramula |
9.54 |
2.255 |
0.412 |
5.468 |
<0.00001x |
|
|
Lu. dysponeta |
1.32 |
0.281 |
0.284 |
0.987 |
0.324 |
|
| Fogged |
Lu.trapidoi |
1.05 |
0.0486 |
0.323 |
0.151 |
0.880 |
|
Lu. gomezi |
0.32 |
−1.128 |
0.292 |
−3.864 |
0.000112x |
|
|
Lu. panamensis |
0.60 |
−0.515 |
0.271 |
−1.898 |
0.0576 |
|
|
Lu. triramula |
0.09 |
−2.381 |
0.452 |
−5.271 |
<0.00001x |
|
|
Lu. dysponeta |
0.49 |
−0.711 |
0.306 |
−2.323 |
0.0201x |
|
| M-Rain |
Lu.trapidoi |
0.67 |
−0.397 |
0.142 |
−2.792 |
0.00524x |
|
Lu. dysponeta |
0.66 |
−0.414 |
0.132 |
−3.125 |
0.00178x |
|
| S.D.-Rain |
Lu.trapidoi |
0.71 |
−0.337 |
0.0624 |
−5.401 |
<0.00001x |
|
Lu. gomezi |
0.75 |
−0.289 |
0.100 |
−2.884 |
<0.00001x |
|
|
Lu. panamensis |
0.76 |
−0.278 |
0.0936 |
−2.973 |
<0.00001x |
|
|
Lu. triramula |
1.46 |
0.379 |
0.158 |
2.399 |
<0.00001x |
|
|
Lu. dysponeta |
1.07 |
0.0669 |
0.0602 |
1.111 |
0.266 |
|
| S.D.*M-Rain |
Lu.trapidoi |
1.03 |
0.0341 |
0.00859 |
3.973 |
<0.00001x |
|
Lu. dysponeta |
1.01 |
0.0142 |
0.00812 |
1.751 |
0.0798 |
|
| S.D.-Rain2 |
Lu. gomezi |
1.01 |
0.0101 |
0.00386 |
2.630 |
0.00855x |
|
Lu. panamensis |
1.01 |
0.0140 |
0.00358 |
3.928 |
<0.00001x |
|
| Lu. triramula | 0.99 | −0.0106 | 0.00586 | −1.807 | 0.0708 |
xStatistically Significant (P < 0.05). ¶the value inside parenthesis is the estimated abundance for the reference group, i.e., Control-Domicile. * indicates a synergistic (a.k.a. interaction) effect. The overdispersion parameter estimates (± S.E.) were 0.973 ± 0.210 for Lu. trapidoi, 1.182 ± 0.234 for Lu. gomezi, 1.487 ± 0.372 for Lu. panamensis, 0.623 ± 0.141 for Lu. triramula and 1.255 ± 0.302 for Lu. dysponeta.
Parameter indicates the different variables considered in the models for the selected sand fly species (see column with heading Species). Models considered the habitat (Domicile or Peridomicile), the Fogging (Fogged), and a second degree polynomial for the monthly S.D. of daily Rainfall (S.D.-Rain) for Lutzomyia gomezi, Lu. panamensis and Lu. triramula; and the interaction between S.D. and the mean (M-Rain) monthly daily rainfall for Lu. trapidoi and Lu. dysponeta.