| Abstract: | Photoperiod studies were conducted with greater sandhill cranes (Grus canadensis tabida) from 1969 to 1972 and from 1982 to 1987 at the Patuxent Wildlife Research Center, Maryland. When housed indoors and exposed to long photoperiods, males produced semen during winter. When exposed to artificially extended photoperiods during spring in outdoor pens, females apparently laid earlier in the year and laid more eggs than they would have without the added light. Cranes did not exhibit any signs of photorefractory response to extended photoperiods. |
| Genre: | Book chapter |
| ProdID: | 5210629 |
| Citation Author: | Gee, G.F.; Pendleton, G.W. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation Editor: | Wood, Don A. (editor) |
| Citation End Page: | 159 |
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| Citation Language: | English |
| Citation Larger Work Title: | Proceedings of the 1988 North American Crane Workshop |
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| Citation Phsyical Description: | v, 305 |
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| Citation Public Comments: | |
| Citation Publisher: | Florida Game and Fresh Water Fish Commission. |
| Citation Series: | Nongame Wildlife Program Technical Report |
| Citation Series Code: | |
| Citation Series Number: | 12 |
| Citation Search Results Text: | Effects of extended photoperiod on sandhill crane reproduction; 1992; Book chapter; 12; Proceedings of the 1988 North American Crane Workshop; Gee, G.F.; Pendleton, G.W. |
| Citation Start Page: | 149 |
| Citation Volume: | |
| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Effects of extended photoperiod on sandhill crane reproduction; 1992; Book chapter; 12; Proceedings of the 1988 North American Crane Workshop; Gee, G.F.; Pendleton, G.W. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 9 Jun 2009 09:23 -0500 |
| Publisher: | Florida Game and Fresh Water Fish Commission. |
