Anticoagulant Rodenticides on our Public Community Lands: Spatial Distribution of Of Exposure & Poisoning of a Rare Forest Predator

This is one of many papers initiated by Mourad Gabriel PhD, a leading scientist in illegal
cannabis grows and impact on wildlife. In this case he studies Fishers (Martes pennati), a
threatened species. The study underscores the impact of illegal grows and heavy use of
anticoagulant rodenticides (ARs) in pristine areas without an urban interface. Fishers have been devastated: of 58 carcasses necropsied 79% exposed. Of the 79% (46 of 58 tested) exposed to ARs. 96% of exposed to second-generation ARs. Far ranging fishers are impacted throughout their immense tracts of uninhabited land (national parks & forests). Study exposes pervasive impact of ARs on sensitive species & middle-sized predators. Later study of 35 collared fisher’s concluded exceedingly high mortality rates and diminished life expectancy.

Take home: Animals in pristine settings far from an urban interface can suffer devastating losses equal to or greater than middle-sized predators in urban interface environments. Unregulated cannabis grows are often the source of far reaching impact in pristine settings. In this case the future of the Fisher (second largest member of the weasel family) as a viable species in California is at stake.

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