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Providing evidence to improve practice

Individual study: Electric fences for reducing sheep losses to predators

Published source details

Nass R.D. & Theade J. (1988) Electric fences for reducing sheep losses to predators. Journal of Range Management, 41, 251-252


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Install electric fencing to reduce predation of livestock by mammals to reduce human-wildlife conflict Terrestrial Mammal Conservation

A replicated, before-and-after study in 1984–1985 of 51 sheep producers in Oregon, Washington and California, USA (Nass & Theade 1988) found that installing electric fencing reduced predation of sheep by coyotes Canis latrans. The number of sheep killed by coyotes each year was lower during two or more years after electric fencing was installed (average 3.5 sheep/year; 0.3%) than during 1–7 years before (average 41 sheep/year; 3.9%). Results were similar when sheep losses were included for producers that had electric fencing installed for one year only (before: 4.3% of sheep killed; after 0.7% killed; numbers not reported). More producers lost no sheep to coyotes after electric fencing was installed (28 of 51, 55%) than before (5 of 51, 10%). In 1984–1985, a total of 51 sheep producers that used electric fencing were interviewed. Electric fences enclosed areas of 1–1,550 ha containing 20–20,000 sheep. Sheep losses to coyotes were recorded during 1–7 years before electric fencing was installed and during one year (five producers) or two or more years (46 producers) after.

(Summarised by Anna Berthinussen)