As wide-ranging scavenging omnivores, feral pigs (Sus scrofa) are considered prone to secondary brodifacoum exposure when this persistent second-generation anticoagulant poison is used to control possums (Trichosurus vulpecular), especially in long-running ground-based baiting programmes. Currently in New Zealand, any detectable brodifacoum residues in pig meat for human consumption are considered unacceptable. To test whether brodifacoum could be used in control operations targeting rats (Rattus rattus), with reduced or no contamination of feral pigs, PESTOFF® rodent blocks (20-ppm brodifacoum) were used in nominally possum-proof bait stations, at Motatau Scenic Reserve, Northland. Snap-trapping indices of rat density carried out before and after baiting indicated that only about one-fifth of rats were killed, revealing low efficacy of this bait application.
|Author||Moriss, G. A., Nugent, G. and Fisher, P.|
|Secondary title||DOC Science Internal Series|
|Publisher||Department of Conservation|
|ISBN/ISSN||1175-6519 / 0-478-22641-1|