North American Crane Working Group

 

Date of this Version

2016

Document Type

Article

Citation

PROCEEDINGS OF THE NORTH AMERICAN CRANE WORKSHOP 13:98-102

Comments

Copyright © 2016 North American Crane Working Group. Used by permission.

Proceedings may include articles not presented at Workshop.

Abstract

Increasing day length is considered to be a stimulus to breeding in many avian species in northern latitudes (Welty 1975). Crane species that breed in high latitudes include Siberian crane (Leucogeranus leucogeranus), lesser sandhill crane (Grus canadensis canadensis), hooded crane (G. monacha), and whooping crane (G. americana). The first captive breeding records for hooded and Siberian cranes were induced with the use of artificially extended photoperiods (Mirande et al. 1996). Most likely, cranes that breed in mid-latitudes also respond to increasing daylight. In 1 study, captive greater sandhill cranes (G. c. tabida) were stimulated to lay earlier than controls by using artificial lights to alter the photoperiod (Gee and Pendleton 1992).

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