The Estimation of the Weight of Bulls from Heart Girth Measurements
Open Access
- 1 March 1946
- journal article
- research article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 29 (3) , 141-143
- https://doi.org/10.3168/jds.s0022-0302(46)92458-7
Abstract
A study was made of the relationship between heart girth measurement and the body wt. of 25 Hol-stein and 25 Guernsey bulls ranging in wt. from 852 to 2351 pounds. The coeffs. of correlation between heart girth measurement and body weight Avere 0.976 for all of the 50 bulls, 0.954 for the Holstein bulls, and 0.958 for the Guernsey bulls; all were highly significant statistically. A calculation of the regression of body wt. on heart girth measurements indicated a straight line relationship. The error of estimate of body wt. based on heart girth measurement was 83.8 lb. or 5.05%. Estimates of the body wt. of bulls were, therefore, very accurate. The correlation coeff. between body wt. and semen volume was 0.2079, which was not mathematically significant.This publication has 0 references indexed in Scilit: