Table 1.
Number of O. coriaceus and D. occidentalis ticks collected in carbon dioxide-baited pitfall traps in 8 dense woodlands bordered by chaparral or grassland, Hopland area, California, 13 June to 7 August 2003.
| Woodland sitea | Number of traps set |
Number of ticks collected by speciesb (stagec) |
Percentage of traps yielding ≥1 tick |
Mean number of ticks/trap ± SD |
|||
|---|---|---|---|---|---|---|---|
| O-cor | D-occ | O-cor | D-occ | O-cor | D-occ | ||
| Beasley | 20 | 7 (n) | 0 | 5.0 | – | 0.35±1.56 | – |
| Hunt Club | 20 | 0 | 1 (f) | – | 5.0 | – | 0.05±0.22 |
| James II | 50 | 27 (23n, 2m, 2f) | 9 (3m, 6f) | 26.0 | 12.0 | 0.54±1.51 | 0.18±0.63 |
| Maude | 20 | 0 | 0 | – | – | – | – |
| Cell Tower, Parson, Pepperwood, Tank | 80 | 0 | 2 (m, f) | – | 2.5 | – | 0.03±0.17 |
| Total | 190 | 34 (30n, 2m, 2f) | 12 (4m, 8f) | 7.4 | 4.7 | 0.18±0.95 | 0.06±0.35 |
a
Beasley, Hunt Club, James II and Maude were bordered by chaparral, the remaining four sites by grassland. Data for the grass-bordered sites were pooled because they yielded only two ticks.
b
O-cor, Ornithodoros coriaceus, D-occ, Dermacentor occidentalis.
c
n, nymph; m, male; f, female.