Abstract
ABSTRACT ON INVESTIGATING the fertility records of a total of 1,200 better-than-average females over a six week period from February to April in the five years 1935–39, Lamoreux (1940) found that the fertility record of the individual was proportional to her intensity of production: the more eggs laid, the greater the percentage of fertile ones, regardless of whether the total egg number over the six week period, or weekly production or clutch size, was used as the criterion of production intensity. He suggested that the general infertility of poor producers was mainly caused by infrequent copulation by such birds and that the relationship between fertility and fecundity was due to the sexual receptivity of the hen being in close accordance with her fecundity or rate of lay. This suggestion appears to have been based mainly on three sets of evidence. Firstly, Lamoreux described an experiment in which the poor fertility . . .
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