Published information about the effectiveness of anti-predator interventions needs to be systematized and disseminated so that to identify the most effective interventions and to apply them further on
We found out that the most effective interventions are electric fences, guarding animals, calving control and physical deterrents; the most effectively protected asset is livestock; and the most effective interventions are used to protect assets from cheetahs, Eurasian lynx, wolves and lions.
Effectiveness was measured as the relative risk (RR), which was transformed to the percentage of damage reduction (DR) for easy interpretation. The formula is simple: DR = (1-RR)*100%. RR is the probability of damage when an intervention is applied divided by the probability of damage without an intervention. The formula of the relative risk is also simple: RR = (nt/Nt)/(nc/Nc), where nt is the number of losses (livestock, beehives, etc.) with the intervention, Nt is the total number of the resource with the intervention (livestock, beehives etc.), nc is the number of losses without the intervention and Nc is the total number of resource without the intervention. The letter "t" stands for treatment (with intervention) and "c" for control (without intervention).
Interventions are effective when RR is less than 1, ineffective at RR = 1 and counter-productive (interventions produce more damage) when RR is higher than 1. Interventions are most effective when RR = 0, i.e. no losses are inflicted when the intervention is applied (nt = 0).
Search for literature, data collection and analysis
CONDITIONS OF SUCCESS
Intensive search for literature