American robin, reproductive biology, DDT, Iowa State University campus
Reproductive biology of the American robin (Turdus migratorius Linnaeus) was studied on the Iowa State University campus during the spring and early summer of 1977. Although the robin breeding population was below that reported for similar habitats elsewhere, it was appreciably larger than during the late 1960's when a major reduction in number of breeding robins at Iowa State followed the use of DDT. Breeding robins, as indicated by number of nests, were more numerous in 1977 than in any year during the height of the Dutch elm disease control program, 1962-70. Basic reproduction parameters such as clutch size and hatching success were similar to those in the pre-DDT era suggesting that the robin population in 1977 had regained its pre-DDT level.
Proceedings of the Iowa Academy of Science
© Copyright 1978 by the Iowa Academy of Science, Inc.
Willson, Gary D.
"Reproductive Biology of American Robins Following a Dutch Elm Disease Control Program,"
Proceedings of the Iowa Academy of Science: Vol. 85:
, Article 6.
Available at: http://scholarworks.uni.edu/pias/vol85/iss3/6