Question:
Has there ever been a study that shows how much harm the cows grazing does to the turtles?
I would like to see the results of such a study.
“The Las Vegas Valley provides crucial habitat for the desert tortoise, but had been facing powerful development pressure from Las Vegas, which was one of the fastest-growing cities in the United States for many years.”“Formally approved by the USFWS in August 1991, the HCP (ed. Habitat Conservation Plan) permitted 22,352 acres of development to occur in the Las Vegas Valley in exchange for the establishment of a 400,000-acre desert tortoise preserve. Earlier, in a related action, the Conservancy helped settle a major lawsuit over the listing of the species, which has resulted in over $1 million being allocated to desert tortoise research.”
“Clark County’s Short-Term Desert Tortoise Habitat Conservation Plan (HCP) was a landmark mitigation agreement developed by The Nature Conservancy and other conservation partners to assure the preservation of the desert tortoise while allowing development in the Las Vegas Valley to continue.”
Tortoises are an “indicator” species, holding that if the animal is having a hard time surviving for some reason, other animals are as well.
“Losses in tortoises are due to a respiratory disease, exacerbated in part by the release of captive tortoises into the wild.”
http://www.csmonitor.com/1992/0212/12081.html
http://www.nature.org/ourinitiatives/regions/northamerica/unitedstates/nevada/placesweprotect/desert-tortoise-habitat-conservation-plan.xml
“I would like to see the results of such a study”
What is the likelihood of an honest study?
“The most complete data is from the Beaver Dam Mountains. Woodbury and Hardy reported a tortoise population density of 150 per square mile in 1948. BLM reduced cattle grazing a few years later and eliminated cattle in 1970. Coombs reported a tortoise density of 39 per square mile in 1974. In these 26 years cattle use was reduced 100 percent and tortoise numbers were reduced 74 percent.
“These tortoises were doing so poorly a veterinarian, Dr. Jarchow, was consulted. He reported all six specimens were suffering from osteoporosis caused by a protein deficiency in their diet. Dr. Jarchow examined five specimens from the same mountains that shared their range with cattle. He reported these specimens were all healthy and well nourished.
“The historical record proves conclusively that tortoise thrive when cattle are on the range with them and without cattle grazing they are always malnourished and unhealthy and their numbers plummet.