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PLEASE NOTE: The schedule posted here is as of 1/25/16, and is subject to change. Please check back for updates.

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Monday, January 25 • 11:20am - 11:40am
Modeling Population Dynamics of Sandhill Cranes Using A Multi-State Open Robust Model and Simulation

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AUTHORS: Michael Wheeler*, University of Wisconsin, Madison; Tim Van Deelen, University of Wisconsin, Madison; Jeb Barzen, International Crane Foundation; Shawn Crimmins, University of Wisconsin, Madison

ABSTRACT: Long-term trends in Midwestern sandhill crane populations indicate positive growth despite much yearly variability, and continued monitoring will be required for effective management. This study is being conducted to explore relationships between life-history stage and recruitment in sandhill crane populations. Since 1990, the International Crane Foundation (Baraboo, Wisconsin) has collected long-term re-sightings data on territorial and non-territorial sandhill cranes in southcentral Wisconsin. We used these data in a multi-state open robust design model to estimate survival and state-transition probabilities of different demographic groups. Primary sessions were on an annual basis, and secondary sessions were monthly. State variables were Territorial and Non-territorial, and classifying birds in either category was based on behaviors observed during re-sightings. Preliminary results suggest that survival of territorial adults and their continued tenure on territory have appreciable effects on growth rate – hence availability of suitable territories may regulate growth rates. Consequently, management of crane populations in the Midwest may depend on creating habitats that support territory establishment.

Monday January 25, 2016 11:20am - 11:40am
Governors

Attendees (19)