Table 2. Variables used to model the environmental favourability for potential wild hosts of Culicoides imicola: red deer, roe deer and wild boar.
| Variable description | Red deer | Roe deer | Wild boar |
| Mean annual precipitation –P– (mm)(1) | + | + | |
| Maximum precipitation in 24 h –MP24– (mm)(1) | + | + | |
| Relative maximum precipitation ( = MP24/P) | |||
| Mean annual number of days with precipitation ≥0.1 mm(1) | − | ||
| Mean annual number of hail days(1) | |||
| Mean annual number of foggy days(1) | + | + | + |
| Mean annual potential evapotranspiration –PET– (mm)(1) | − | − | |
| Mean annual actual evapotranspiration (mm) ( = min [P,PET]) | + | + | |
| Mean relative air humidity in January at 07:00 h –HJN– (%)(1) | + | + | − |
| Mean relative air humidity in July at 07:00 h –HJL– (%)(1) | − | + | |
| Annual air humidity range (%) ( = HJL-HJN)(1) | |||
| Mean temperature in January –TJN– (°C)(1) | − | − | |
| Mean temperature in July –TJL– (°C)(1) | + | + | |
| Annual temperature range (°C) ( = TJL-TJN)(1) | + | ||
| Mean annual temperature (°C)(1) | + | ||
| Mean annual number of frost days (minimum temperature ≤0°C)(1) | − | ||
| Continentality index(1) | + | ||
| Humidity index(1) | + | + | + |
| Mean annual insolation (hours year−1)(1) | − | ||
| Distance to the nearest town with more than 100,000 inhabitants (km)(2) | + | + | |
| Distance to the nearest town with more than 500,000 inhabitants (km)(2) | + | ||
| Distance to the nearest highway (km)(2) | + | − | + |
Variables included in each model and the sign of their coefficients (positive or negative) are shown. All variables were retained at p<0.01.
Sources:
(1)
[30];
(3)
[53]; data on the number of inhabitants of urban centres taken from the ‘Instituto Nacional de Estadística’ (http://www.ine.es).