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Science 23 December 1966:
Vol. 154. no. 3756, pp. 1568 - 1569
DOI: 10.1126/science.154.3756.1568
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Articles

Initial and Resultant Population Densities in Chickens between Brooding and Sexual Maturity

G. L. Mangan 1 and M. G. King 1

1 Menninger Foundation, Topeka, Kansas, and Department of Psychology, University of Sydney, Sydney, Australia

Seven flocks of chickens were raised in groups from weeks 5 to 9 after hatching. Initially the groups had the same number of chickens but they di0ered in population density. The number of birds that survived to week 9 was strongly related to the initial population density.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)