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Full-Text Articles in Life Sciences
Distribution Of Sexual Activities Within Estrus Of Dairy Cattle, Donna Durbin
Distribution Of Sexual Activities Within Estrus Of Dairy Cattle, Donna Durbin
Masters Theses & Specialist Projects
Previous studies of dairy cattle have indicated that heifers and cows in hot, cold and moderate weather had different patterns of sexual activities. The purpose of this study was to compare distribution of sexual activities within estrus of dairy cattle. Three groups of lactating cows in hot, cold and moderate weather and a group of heifers in cold weather were observed. Estrus for each individual was divided into 12 equal periods. Sexual activities for 3 and 6 hours before and after estrus were also observed. The numbers of mounts and distribution of total sexual activities was analyzed. Mounts received per …
The Relationship Between Linear Measurements & Subjective Placings In Elite Angus Cattle, Ted Dyer
The Relationship Between Linear Measurements & Subjective Placings In Elite Angus Cattle, Ted Dyer
Masters Theses & Specialist Projects
The cattle shown from 1981 to 1984 at the American Angus Breeders' Futurity were studied to determine the relationship between linear measurements and the judge's subjective placings. Linear measurements taken prior to the showing included wither height, hip height, and body length for both bulls and heifers. In addition body weight and scrotal circumference were recorded for bulls. A total of 624 cattle were studied-- 407 heifers and 217 bulls.
The cattle were divided into five groups by age and sex to analyze the annual difference in means and standard deviations for all recorded measurements. Among all five groups of …
The Use Of Linear Measurements For Determining Growth Rate & Size In Cattle, C. Norman Mcglohon
The Use Of Linear Measurements For Determining Growth Rate & Size In Cattle, C. Norman Mcglohon
Masters Theses & Specialist Projects
The calves born in the 1979 and 1980 calf crops at Sam Sells and Sons' Polled Hereford Farm in Moultrie, Georgia, were used in a study comparing immature body measurements with subsequent growth. The measurements taken at birth included weight, front leg length, front cannon bone length, and rear cannon bone length. In addition, hip height was measured at one hundred days, seven months, and twelve months of age. Weight was taken at seven months, twelve months and fifteen months of age.
The data were analyzed in four groups according to year of birth and sex. Coefficients of correlation were …