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Sweden, 40 years with wild boars. Pros and Cons on the return of a highly reproductive
ungulate
P-A Åhlén, Swedish Association For Hunting and Wildlife Management
(Svenska Jägareförbundet)
Raccoon Dog Project
P-A Åhlén, Swedish Association For Hunting and Wildlife Management(Svenska Jägareförbundet)
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Wild Boar (Sus scrofa)
• Annual home range 800-2000ha (>10 000ha)
• High reproduction• High mortality from hunting (94% hunting,
4% traffic, 2% diseases and drowning) • 70% of the annual food is related to
hunters feeding• Low dispersal abillity (4 km for sows and
16 km for males)
Native and introduced range
http://www.untamedscience.com/biodiversity/wild-boar/
History in Sweden
• Eradicated ≈ 1000, 1600, 1750, 1950• Last introduction1970-ish• Eradication…• Wild Boar law 1980
•New law 1988
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Population growth 28%/yearDoubble numbers every 3 year (2,85)
Speed 5 km / year (Truvé 2004)
Today 25% of possible area
30 more years of dispersal to populate possible areas
400 000 – 500 000 / year
PROGNOSIS DISPERSAL
Limiting factors
50 cm
Limiting factors
Limiting factors
Limiting factors / ASF
Limiting factors / Management
Tools of the trade
Tools of the trade
Tools of the trade
Tools of the trade
Tools of the trade
Tools of the trade
Detect presence - EWS
EWS-Wild Boar
• 1 camera / 2000ha• 100 000ha → 50 cams• Food, sex, territory and tar
Sex and territory
Food
MMS-kameror
Management
• Baits and MMS-cams• Dogs and Hounds• Cars, GPS
•1000 wildlife managers•50 countries
INVASIVE SPECIES
• Quickly escalating development on tools and methods for control and eradication of invasive species
• Development of species specific immunocontrareceptive baits
• NZ predict development of tools for continental eradications within 5‐10 years
• Extreme conservation gains to come
Future Game Management?• Challenge recreational hunters role in game management• If the hunters cannot control game populations down to levels set by the
society, new methods will replace them
• Almost total consensus on recreational hunters inability to stabilize and reduce game populations
• Few believed us when we claimed that ungulate populations were regulated with recreational hunters in the Nordic countries
• Popular game species has the most secured conservation status
• Control of ungulate populations is a globally growing research branch
• Massive discontent with recreational hunters ability to reduce game populations
• Ban for wild boar hunting in some US states
• Poison, professional hunters, helicopters, snares, corral traps, electrocution devices with solar panels that recharge for next boar and so on
Lessons from Sweden
• Farmers with no hunting rights
• Commercial hunting• High lease cost
-Feeding -Protection of sows
Effekten av villsvinets (Sus scrofa) populasjonsvekst i Sverige på populasjonene av rødrev (Vulpes vulpes), grevling (Meles meles) og storfugl (Tetrao urogallus)Bjørnrud 2013
Thank you!