Fig. 1
Number of wild boars identified positive for African swine fever in Poland by year
Fig. 2
Number of ASF outbreaks detected in domestic pigs in Poland by year
Fig. 3
African swine fever (ASF) outbreaks in domestic pigs (blue) and wild boars (red), and restriction zones (as of 31/12/2021). Outbreaks in 2021 are shown in intense colours, and outbreaks in 2014–2020 in pastel colours. NUTS – nomenclature of territorial units for statistics
Fig. 4
The progress of African swine fever (ASF) in domestic pigs (blue) and wild boars (red) in the years 2014–2021. Outbreaks in a given year are shown in intense colours, and outbreaks in previous years in pastel colours. NUTS – nomenclature of territorial units for statistics
Fig. 5
Areas of African swine fever (ASF) occurrence in the years 2014–2021 shown as zones within 10 km of the outbreaks in domestic pigs and wild boars. NUTS – nomenclature of territorial units for statistics
Fig. 6
Annual areas of African swine fever (ASF) occurrence in domestic pigs and wild boars layered over a common map (oldest layer at the top). NUTS – nomenclature of territorial units for statistics
Table 1
The combined surface area of all 10-km radius buffer zones around African swine fever outbreaks (in km2)
| Year | Outbreaks in domestic pigs and wild boars – single-year area | Outbreaks in domestic pigs and wild boars – multiple-year cumulative area | Outbreaks only in wild boars – multiple-year cumulative area |
|---|---|---|---|
| 2014 | 1,499.6 | 1,499.6 | 1,499.6 |
| 2015 | 3,021.7 | 3,040.6 | 3,040.6 |
| 2016 | 7,664.6 | 8,866.7 | 6,972.0 |
| 2017 | 20,276.4 | 23,200.5 | 21,720.7 |
| 2018 | 42,299.1 | 47,269.9 | 45,014.8 |
| 2019 | 62,746.2 | 75,356.9 | 73,542.8 |
| 2020 | 80,003.1 | 98,945.1 | 96,602.8 |
| 2021 | 83,892.4 | 124,952.2 | 119,234.8 |
Fig. 7
The combined surface area of the 10-km radius buffer zones around the points where African swine fever occurred over the years in percentages of the surface area of Poland
Fig. 8
Scatterplots for Pearson’s correlation between the year and the surface area of the African swine fever occurrence zone: a) single-year area for outbreaks in domestic pigs and wild boars; b) multiple-year cumulative area for outbreaks in domestic pigs and wild boars; c) multiple-year cumulative area for outbreaks in wild boars only
Fig. 9
a) Ratio of the sum of African swine fever (ASF)-positive wild boars and ASF outbreaks in domestic pigs in a given year to the surface area of 10-km-radius buffer zones around the points of these events (units/km2) – green line. b) Ratio of the number of ASF-positive wild boars in a given year to the cumulative area (from the beginning of 2014) within a radius of 10 km from the sites of ASF outbreaks in wild boars (units/km2) – orange line
Table 2
Shooting of wild boars in Poland (37)
| Hunting year (from April 1 to March 31) | Hunted wild boars (in thousand head) |
|---|---|
| 2000/2001 | 93 |
| 2005/2006 | 138 |
| 2008/2009 | 226 |
| 2009/2010 | 218 |
| 2010/2011 | 233 |
| 2011/2012 | 196 |
| 2012/2013 | 240 |
| 2013/2014 | 242 |
| 2014/2015 | 291 |
| 2015/2016 | 342 |
| 2016/2017 | 312 |
| 2017/2018 | 341 |
| 2018/2019 | 266 |
| 2019/2020 | 332 |
| 2020/2021 | 249 |
Fig. 10
Comparison of the African swine fever (ASF) occurrence areas (10-km zones around the outbreaks) between 2020 (green) and 2021 (beige). The common area is marked in grey
Fig. 11
50-km buffer from African swine fever (ASF) outbreaks in cumulative periods of 2014–2020 vs. 2014–2021. Pink shows the area for 2014–2020 (it is also the common part for both periods, i.e. for the buffer zones drawn at the ends of 2020 and 2021). Light brown represents the buffer surface area increase in 2021. NUTS – nomenclature of territorial units for statistics
Fig. 12
100-km buffer from African swine fever (ASF) outbreaks in cumulative periods of 2014–2020 vs. 2014–2021. Yellow shows the area for 2014–2020 (it is also the common part for both periods, i.e. for the buffer zones drawn at the ends of 2020 and 2021). Light green represents the buffer surface area increase in 2021. NUTS – nomenclature of territorial units for statistics