| distribution and interspecies contact of feral swine and cattle on rangeland in south texas: implications for disease transmission. | the last outbreak of foot-and-mouth disease (fmd) in the united states occurred in 1929. since that time, numbers and distribution of feral swine (sus scrofa) have increased greatly, especially in the southern states. this creates a potential risk to livestock production because swine are susceptible to, and can be carriers of, several economically harmful diseases of livestock. most importantly, swine are potent amplifiers of fmd virus. in this study, global positioning system (gps) collars wer ... | 2010 | 20090028 |
| geostatistical analysis of biomarkers of genotoxicity in cattle, bos taurus and bos taurus x bos indicus, sentinels near industrial facilities. | this study, performed at the behest of ranchers living and working down-prevailing wind from industrial facilities located in calhoun county, texas investigated locational risks to ecosystem health associated with proximity to specific industrial complexes. concerns expressed were for potential genotoxicity in cattle resulting from the release of complex chemical mixtures. the comet assay and flow cytometric evaluation of variations in dna content were utilized to evaluate dna damage. bayesian g ... | 2009 | 18763035 |
| comparison of f1 bos indicus x hereford cows in central texas: i. reproductive, maternal, and size traits. | cows (n = 116) sired by angus, gray brahman, gir, indu-brazil, nellore, and red brahman bulls and from hereford dams were evaluated (when bred to the same breed of bull) for reproductive performance and cow weight and height and their calves (n = 1,161) were evaluated for birth and weaning weight in central texas (temperate winters and subtropical summers). cows were born from 1982 to 1985 and their calves were born from 1985 to 1999. crossbred cows sired by angus had a higher (p < 0.10) occurre ... | 2001 | 11424679 |
| high environmental temperature and humidity decrease oocyte quality in bos taurus but not in bos indicus cows. | two experiments were conducted to assess the effects of environmental temperature and humidity on the quality and developmental capabilities of bovine oocytes. in experiment 1, bos taurus (holstein and crossbred angus) cows were subjected to 5 weekly sessions of ultrasound-guided follicle aspiration from february 16 through march 23 (cool season) and 5 sessions from may 22 through june 20 (hot season). in experiment 2, bos taurus (holstein) and bos indicus (brahman) cows were superstimulated (su ... | 1998 | 10732044 |
| genetic improvement of beef cattle in the united states: cattle, people and their interaction. | the purpose of this essay is to develop a historic perspective of the beef cattle population and the legion of people directing its genetic change so that future leadership can increase the rate of breeding technology assimilation. use of cattle for beef to feed millions is relatively recent. the beef industry of the united states has a rich, romantic heritage that combined spanish exploitation with british tradition. spanish cattle became adapted as the texas longhorn and the european cattle be ... | 1982 | 7085522 |