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.
Additional publication details
Effects of extended photoperiod on sandhill crane reproduction
Florida Game and Fresh Water Fish Commission.
Patuxent Wildlife Research Center
Larger Work Type:
Larger Work Subtype:
Other Government Series
Larger Work Title:
Proceedings of the 1988 North American Crane Workshop