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Conditioned food aversions: principles and practices, with special reference to social facilitation.
Aversive conditioning may provide an effective management tool to prevent animals from eating palatable poisonous plants that cause major economic loss and should be grazing separately from non-averted animals to avoid the influence of social facilitation which can rapidly extinguish aversions. Expand
Locoweed Poisoning in Livestock
Historically toxic species are divided into three groups based on the toxic syndromes observed in livestock: 1) selenium poisoning, 2) nitrotoxin poisoning, and 3) locoism caused by the toxin swainsonine. Expand
Relationship Between the Endophyte Embellisia spp. and the Toxic Alkaloid Swainsonine in Major Locoweed Species (Astragalus and Oxytropis)
A survey of the major locoweeds from areas where locoweed poisoning has occurred and found species found to contain the fungal endophyte and produce substantial amounts of swainsonine were A. mollissimus, A. cibarius, and O. sericea. Expand
Dose Response of Sheep Poisoned with Locoweed (Oxytropis Sericea)
Both the clinical and histologic lesions, especially cerebellar lesions are suggestive of neurologic dysfunction even at low daily swainsonine doses of 0.2 mg/kg, suggesting that prolonged locoweed exposure,Even at low doses, results in significant production losses as well as histologic and functional damage. Expand
Plant toxins and palatability to herbivores.
Paper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada.
Adverse influence of social facilitation and learning context in training cattle to avoid eating larkspur.
Reinforced aversion was overcome by social facilitation in an unfamiliar field-grazing environment and the aversion was renewed when the heifers were returned to the pen- and group-feeding situation where the aversionwas created. Expand
Total Alkaloid Determinations in Larkspur and Lupine with near Infrared Reflectance Spectroscopy1
Near infrared reflectance spectroscopy (NIRS) is used for quality component determinations in forages and grains. However, the use of NIRS to determine antiquality factors in forages has not beenExpand
Alkaloids as anti-quality factors in plants on western U.S. rangelands
Alkaloids constitute the largest class of plant secondary compounds, occurring in 20 to 30% of perennial herbaceous species in North America. Alkaloid-containing plants are of interest, first becauseExpand
Prescribed burning : vegetative change, forage production, cost, and returns on six demonstration burns in Utah.
Six demonstration burns were conducted between 1974 and 1976 as part of the Utah Rangeland Development Program, where big sagebrush was essentially eliminated on the areas that were burned and forage production increased several-fold above preburn production. Expand
Analysis of swainsonine: extraction methods, detection, and measurement in populations of locoweeds (Oxytropis spp.).
Individual plant variability was found to be highly significant for both O. sericea and O. lambertii populations, and both populations found to contain higher swainsonine levels were restricted to the most southern and western portion of its distribution. Expand