The Ostrich Communal Nesting System (Monographs in Behavior and Ecology) - Hardcover

Bertram, Brian C.r.

Hardcover

ISBN 10: 0691087857 ISBN 13: 9780691087856

Publisher: Princeton University Press, 1992

Synopsis

As the study of co-operative breeding systems expands, a number of key species form the examples that underpin our general understanding. The ostrich is increasingly becoming such a textbook species, on the basis of the results obtained in Brian Bertram's study of vigilance and egg discrimination in this bird. Here, Bertram presents new data on the ostrich communal nesting system, in which several females lay in one female's nest, with only one female and the male doing all the work. His study unravels the basis of the co-operation observed, and explains how a system involving apparent altruism is maintained by natural selection. It is now possible as never before to explain and quantify the effects of the different choices these birds make and to integrate ecological and morphological factors such as predation and size. Based on three seasons of study in Tsavo West National Park in Kenya, the author recognizes individual birds, detects and monitors well-concealed nests, determines the motherhood of eggs from their surface appearance, and uses time-lapse photography of nests. Key findings are that females can switch rapidly between reproductive strategies, that a nesting female can recognize her own eggs and when necessary discriminate against those of other females, and that the whiteness of ostrich eggs is an adaptation that protects them against overheating but at the cost of greater vulnerability to predation.

Edition details

• Publisher: Princeton University Press
• Publication date: 1992
• Language: English
• ISBN 10: 0691087857
• ISBN 13: 9780691087856
• Binding: Hardcover
• Number of pages: 204