Table 11. Performance of five nonlethal electric rodent barrier designs.


 % Lower Upper %
 No. No. Successful electrode electrode Attempts
Barrier design crossings attempts attempts shocks shocks shocked

Prototypea 2 47 4.3 37 5 89.4

Modified
 prototype 3 45 6.7 30 15 100.0

Plastic net Ic 3 42 7.3 40 1 97.6

Plastic net IId 5 37 13.5 36 3 105.4*

Plastic net IIIe 1 32 3.1 28 1 110.4*


a Twenty-five millimeter chicken wire (35 cm high) with two ground and two
active electrodes spaced 15 cm apart at top.
b Same as above with lower ground wire excluded.

c Twenty-five millimeter plastic fish net with one ground wire and three
active electrodes spaced 30 cm apart.

d Three electrodes interspaced with three ground wires at a distance of 37
mm.
e Three electrodes 5 cm in front of net interspersed with two ground wires
spaced 5 cm apart vertically.

* Exceeded 100 percent when more than one shock was received by rats per each
attempt to cross.