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5.3.4.3 How many baits do I need to distribute?

The bait density to be applied in a vaccination area depends on the fox density and the density of potential bait competitors. To cope with the latter, a reasonable surplus of baits is required to provide enough baits for foxes. The palatability or attractiveness of the bait to different types of non-target-species (carnivores, omnivores, and herbivores) must be taken into account when determining the bait density.

The calculation of the bait density is largely calculated empirically, and is not a straightforward scientific approach. During the first years of ORV, it was assumed that 10 – 15 baits should be distributed for every animal targeted. This meant that 10 to 15 baits were distributed for an estimated fox density of 1 animal per km².

Unfortunately, most of the time the fox density is not known and only a rough idea is available (low or high fox density). Where the fox density is considered ‘low’, a bait density of approximately 20-25 baits per km² seems reasonable. Where the fox density is estimated to be very high, especially in long-term vaccinated areas, 25-30 baits per km² is more appropriate. These suggested bait densities have yielded positive results in terms of fox bait uptake.


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Version 1 - Last updated November 2012