Keith Weller's Images
Organization: USDA Agricultural Research ServiceUnit:
Country: United States
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| 17 Images of 5 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 1323054 | American bison | Bison bison | This bison is part of a 13-head herd involved in a brucellosis vaccine study at the National Animal Disease Center in Ames, Iowa. |
| 1321031 | pig (domestic) | Sus scrofa (domestic type) | Geneticist Gary Rohrer examines Meishan pigs at the ARS Roman L. Hruska U.S. Meat Animal Research Center in Clay Center Nebraska. |
| 1321032 | pig (domestic) | Sus scrofa (domestic type) | Meishan pig. |
| 1320068 | cattle | Bos spp. | |
| 1321064 | cattle | Bos spp. | Cows grazed on pastures have five times more of a fatty acid called conjugated linoleic acid (CLA) in their milk. The incidence of cancer in laboratory rats declines after they've consumed CLA. |
| 1321063 | cattle | Bos spp. | Because much of the cost of a cow is the feed and labor needed to maintain her, fewer but higher yielding cows mean lower priced milk. Dairy herd improvement ultimately benefits consumers. That's why it's just as important to keep complete and accurate records as it is to keep the cows contented. The National Cooperative Dairy Herd Improvement Program has been tracking Bossy's milk yields since 1905. Over the years, this program has made enormous contributions to dairy cattle breeding. ARS scientists receive the lactation records of all herds enrolled in the program and use the figures to rank the bulls that sire the nation's dairy cows and to rank the cows themselves. The results of years and years of scientific dairying? Milk production has been trending upward for more than 25 years in the United States-from about 117,000 million pounds in 1970 to more than 150,000 million pounds in 1994-even though the number of milk cows has been reduced |
| 1324005 | pig (domestic) | Sus scrofa (domestic type) | Piglet. |
| 1324002 | pig (domestic) | Sus scrofa (domestic type) | This sow's five pigs developed from cryopreserved and surgically transferred embryos. |
| 1318080 | pig (domestic) | Sus scrofa (domestic type) | Animal physiologist Lawrence Johnson displays a pig born as a result of studies using sorted sperm and in vitro fertilization. |
| 1319082 | white-tailed deer | Odocoileus virginianus | Microbiologist Diana Whipple (left) and animal caretaker Katy Lies offer treats to a white-tailed deer being used to study tuberculosis in its wild counterparts. |
| 1319084 | elk | Cervus canadensis | Bison and elk are the remaining reservoirs of brucellosis in the United States. RB51, the new vaccine that protects bison from the disease, will be evaluated for protection of elk (shown above). |
| 1320067 | cattle | Bos spp. | Watering cattle and providing shelter are two important ways to help keep them cooler and less stressed during heat waves. |
| 1320085 | cattle | Bos spp. | A simple blood test that checks the blood urea nitrogen (BUN) levels in cattle can help producers fine-tune their herd's feeding regimen. |
| 1322011 | cattle | Bos spp. | Hereford cattle on ARS' Fort Keogh Livestock and Range Research Labratory near Miles City, Montana. |
| 1323019 | cattle | Bos spp. | Cattle |
| 1323089 | cattle | Bos spp. | To estimate the number of brown stomach worms in a pasture, researchers place a worm-free calf on grass for a measured length of time, then check for parasite eggs in its feces. |
| 1318086 | cattle | Bos spp. | This Piedmontese-Hereford crossbred calf displays classic double muscling because it inherited a defective myostatin gene from both of its parents. |
