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Whooping crane egg management: options and consequences

By:
and

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Abstract

Eggs to build captive whooping crane (Grus americana) flocks and most eggs for reintroduction experiments have come from second viable eggs in 2-egg clutches in Canada. Four years ago, egg removal ceased. Based on reproductive rates for years when second eggs were removed and for years when eggs were not removed, we project numbers of young fledging in the wild and in captivity for the 2 most likely egg-management strategies. From existing data sets, we find that reproductive performance was, on average, better during the era of routine removal of the second viable eggs than when no manipulation occurred. Further, the number of young produced in captivity from the removed eggs, on average, resulted in a doubling of the number of young birds (wild and captive) alive each autumn.

Additional Publication Details

Publication type:
Book chapter
Publication Subtype:
Book Chapter
Title:
Whooping crane egg management: options and consequences
Year Published:
2001
Language:
English
Publisher:
North American Crane Working Group
Publisher location:
Seattle, Washington
Contributing office(s):
Patuxent Wildlife Research Center
Description:
ix, 226
Larger Work Type:
Book
Larger Work Subtype:
Other Government Series
Larger Work Title:
Proceedings of the Eighth North American Crane Workshop
First page:
17
Last page:
23