Artificial eyespots on cattle reduce predation by large carnivores

Area of Science:

• Evolutionary biology
• Animal behavior
• Wildlife conservation

Background:

• Eyespots are visual signals found in various species, primarily functioning as anti-predator mechanisms.
• The precise function of eyespots (e.g., mimicry, startling) remains debated across taxa.
• Naturally occurring eyespots are absent in contemporary mammals, limiting research in this area.

Purpose of the Study:

• To investigate the efficacy of artificial eyespots as a deterrent against large mammalian predators attacking livestock.
• To determine if eyespots reduce predation risk for cattle targeted by ambush carnivores.
• To assess the potential of artificial markings as a practical livestock protection strategy.

Main Methods:

• Artificial eyespots were painted on the rumps of cattle.
• Control groups included cattle with cross-markings and unmarked cattle.
• All groups were exposed to similar predation risks from lions and leopards.

Main Results:

• Cattle with painted eyespots exhibited significantly higher survival rates compared to control groups.
• Eyespot-marked cattle experienced fewer attacks from ambush carnivores.
• Cross-marked cattle also showed increased survival, suggesting a general effect of conspicuous markings.

Conclusions:

• Artificial eyespots can effectively deter large mammalian predators, marking the first evidence of such a phenomenon in mammals.
• The study supports the 'detection hypothesis' for eyespot function.
• Applying artificial marks to livestock presents a potentially cost-effective method for reducing predation.