Are Illegal California Pot Farms Killing Owls?
The study, released Jan. 11 in the journal Avian Conservation and Ecology, showed that seven of the 10 northern spotted owls collected tested positive for rat poison, while 40 percent of 84 barred owls collected also tested positive for the poison.
The study is the first published account of anticoagulant rodenticide in northern spotted owls, which are listed as a threatened species under federal and state Endangered Species acts.
Northern spotted owl.
Gabriel’s studies in 2012, 2013 and 2015 were the first to link rat poison and illegal marijuana farms to the deaths of fishers, a weasel-like mammal living in remote forests of California and the Pacific Northwest, bringing broad attention to the issue.
Proposition 64, which legalizes recreational marijuana in the state, took effect this month. With its arrival, resource managers expect the number and size of unpermitted, private cultivation sites to grow, which could exacerbate the problem.
The study authors note that an estimated 4,500 – 15,000 private cultivation sites are in Humboldt County alone, yet the county has seen legal permits for only a small fraction of them. That means there are thousands of unpermitted private grow sites with no management oversight.
“When you have thousands of unpermitted grows and only a handful of biologists that regulate that for multiple counties, we’re deeply concerned that there aren’t sufficient conservation protective measures in place,” Gabriel said. “If no one is investigating the level at which private marijuana cultivators are placing chemicals out there, the fragmented forest landscapes created by these sites can serve as source points of exposure for owls and other wildlife.”
Anticoagulant rodenticides inhibit the ability of mammals and birds to recycle vitamin K. This creates a series of clotting and coagulation problems, which can lead to uncontrollable internal bleeding.
Barred owls and added stressors
Barred owls are a physically larger group of owls currently competing for resources and space in critical habitat designated for northern spotted owls. Forty percent, or 34 of 84, of the barred owl tissue samples collected for this study tested positive for anticoagulant rodenticide. The owls are being exposed through the prey they eat.
Environmental contamination, when coupled with ongoing competition from barred owls, poses an additional stressor on northern spotted owls, the study said. The fact that barred owls are contaminated as well shows that the species may be used as potential surrogates for detecting these contaminants in northern spotted owls.
Credit: 017 California Academy of Sciences
“Access to these owl specimens allows us to explore the health of the entire regional forest system,” says Jack Dumbacher, curator of Ornithology and Mammalogy at the California Academy of Sciences. “We’re using our collections to build a concrete scientific case for increased forest monitoring and species protection before it’s too late to intervene.”
This study’s researchers did not kill any owls for this study. Northern spotted owls were opportunistically collected when found dead in the field, while barred owl tissue samples were provided by outside investigators conducting an unrelated barred-owl project.
The necropsies for this study were conducted at the California Academy of Sciences and the California Animal Health and Food Safety Laboratory System, which is part of the UC Davis School of Veterinary Medicine.
Additional co-authoring institutions include Green Diamond Resource Company, Hoopa Valley Tribe and Humboldt State University.
The study was funded by the United States Fish and Wildlife Service, Arcata and Yreka California Field Offices.
Source: http://www.ineffableisland.com/2018/01/are-illegal-california-pot-farms.html
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I HOPE THE OWLS POUR SOME GASOLINE ON THE FARMERS PRIMARY RESIDENCES !
Or at least Shit on them.