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|Title:||Sublethal Carbon Monoxide Toxicosis in Newborn Piglets and Weanling Pigs: Physiology, Behavior, and Performance|
|Author(s):||Morris, Gerald Lynn|
|Department / Program:||Animal Science|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
|Subject(s):||Agriculture, Animal Culture and Nutrition|
|Abstract:||A total of two hundred eighteen pigs of two ages were used to determine the effects of elevated, sublethal atmospheric concentrations of carbon monoxide (CO) on physiologic, behavioral, and performance parameters.
In one group of experiments, neonatal piglets were exposed pre- and postnatally to CO at a concentration of background (less than 5 ppm), 200 ppm, or 250 ppm. Results indicated that neonatal piglets exposed to CO at 250 ppm were affected physiologically: total hemoglobin concentration was lower and carboxyhemoglobin saturation ratio was higher than in those at background or 200-ppm concentrations. Piglets exposed pre- and postnatally to CO at 250 ppm took a longer time to nurse for the first time than did those in other treatment groups. Also, piglets exposed to CO at 250 ppm had compromised performance in open-field and negative-geotaxis behavioral tests. A threshold atmospheric CO concentration between 200 ppm and 250 ppm apparently existed, above which physiological and behavioral parameters were affected deleteriously.
In a second set of experiments, weanling pigs exposed to atmospheric CO at 200 ppm or 300 ppm had greater total Hb concentration than did littermates at background concentration. Also, pigs exposed to atmospheric CO at 300 ppm had less body-weight gain and lower feed-conversion efficiency than did those at background concentration. There would appear to have been a threshold atmospheric CO concentration between 200 ppm and 300 ppm above which performance parameters were affected deleteriously.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1984.
|Date Available in IDEALS:||2014-12-15|