نتایج جستجو برای: grazing cattle
تعداد نتایج: 62587 فیلتر نتایج به سال:
Rising temperatures due to climate change are pushing the thermal limits of many species, but how climate warming interacts with other anthropogenic disturbances such as land use remains poorly understood. To understand the interactive effects of climate warming and livestock grazing on water temperature in three high elevation meadow streams in the Golden Trout Wilderness, California, we measu...
The precision and accuracy of pedometers for measuring distance traveled by cattle on production size grazing systems were studied. Pedometer calibration factors were similar among~cattle, but varied because of differences in the sensitivity of pedometers to movement and/or the tightness of the case around the animal’s leg. Adjusting pedometer readings by their individual calibration factor pro...
A 2-yr grazing experiment was conducted to assess the effects of grazing management on cattle distribution and pasture and stream bank characteristics. Six 12.1-ha cool-season grass pastures in central Iowa were allotted to 1 of 3 treatments: continuous stocking with unrestricted stream access (CSU), continuous stocking with stream access restricted to 4.9-m-wide stabilized crossings (CSR), or ...
Since gray wolf reintroduction in 1995, wolf populations in the northern Rocky Mountains have increased dramatically. Incidents of wolf predation on livestock have increased with wolf populations. Although rough tallies of livestock death or injury losses caused by wolf predation are made each year, we know almost nothing about the indirect effects of wolf-livestock interactions on cattle produ...
cattle—as concentrated feeds, harvested forages, or a complementary grazing program— accounts for a significant portion of annual production costs in a cattle operation. To optimize productivity of today’s cattle operations, some supplemental nutrients will be required at critical periods during the annual production cycle. However, producers need to avoid unnecessarily compounding this cost by...
Grazing cattle suflflering from ataxia and paralysis in hind quarters and horn damage were found in some detached is)ands of Okinawa prefecture, Japan, Clinical syndromes resembled the typical ones of the cycad poisoning reported previously in Papua, New Guinea, Puerto Rico, Dominican Republic. and Australia, Among these diseased cattle. two cows i-'ith seyere ciinical signs were examined patho...
Pathological findings and liver and kidney analyses confirmed that cattle had died of chronic copper poisoning on a farm in the north-eastern Transvaal. This is the first known published record of chronic copper intoxication of cattle in southern Africa. An epidemiological study revealed that a source of copper was air pollution which could have arisen from a nearby copper smelting unit. Buffal...
Between August and October 2000, a cross-sectional study was conducted in smallholder dairy farms in Mbale District, Uganda to assess the prevalence of ticks and tick-borne diseases under different grazing systems and agro-ecological zones and understand the circumstances under which farmers operated. A questionnaire was administered to obtain information on dairy farm circumstances and practic...
We have examined for hemoplasma infection among cattle in the Hiroshima and Miyazaki prefectures by using a sensitive real-time PCR, with SYBR Green I and with melting curve analysis, which allow to distinguish the two bovine hemoplasma species, Mycoplasma wenyonii and 'Candidatus M. haemobos'. We found 69.4% of 36 cattle in Hiroshima and 93.8% of 32 cattle in Miyazaki infected with either of t...
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