Accuracy of Partial Trapnest Records

RESULTS pertaining to the accuracy of partial trapnest records have varied, depending on the type of partial trapping scheme employed, but generally have been favorable. Hays (1946) summarized previous work concerning the value of limited trapnesting in poultry breeding. The objective of this phase of the present study was to determine the accuracy of trapnesting 1, 2, 3, …, 6 days a week in estimating annual records and breeding values of hens which had been selected to the extent that each had five or more daughters which completed annual records. DATA The data were first year production records for White Leghorns at the Kimber Poultry Breeding Farm, Niles, California, during the period 1934–1940. Date of first egg, daily, monthly, and annual records (number of eggs laid during a 365 day period from date of first egg) for 403 dams and for each of the annual records …