Whooping crane egg management: options and consequences
By: D. H. Ellis and G.F. Gee
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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.
Suggested Citation
Ellis, D.H., Gee, G., 2001, Whooping crane egg management: options and consequences, chap. of Proceedings of the Eighth North American Crane Workshop, p. 17-23.
| 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 |