USE OF SATELLITE TELEMETRY TO IDENTIFY TEMPORAL AND SPATIAL DISTRIBUTION OF THE MIDCONTINENT SANDHILL CRANE POPULATION THROUGHOUT THE ANNUAL CYCLE

• Main Authors: Krapu, Gary L., Brandt, David A.
• Format: Text
• Language: unknown
• Published: DigitalCommons@University of Nebraska - Lincoln 2001
• Subjects: Alaska; Canada; Grus canadensis; Platte River; Russia; satellite telemetry; Siberia; Animal Sciences; Behavior and Ethology; Biodiversity; Ornithology; Population Biology; Terrestrial and Aquatic Ecology
• Online Access: https://digitalcommons.unl.edu/nacwgproc/81; https://digitalcommons.unl.edu/context/nacwgproc/article/1075/viewcontent/Krapu___Use_of_satellite.pdf

Effective management of the midcontinent sandhill crane (Grus canadensis) population requires having detailed information available on the distribution of subspecies and subpopulations throughout the annual cycle. The current study is being undertaken in partnership with several federal and state agencies and private organizations to obtain key information not currently available. We are monitoring crane movements throughout the year by attaching Platform Transmitting Terminals (PTTs) to plastic leg bands and with the aid of equipment on board orbiting NOAA weather satellites relocating the radiomarked individuals at 4-10 day intervals throughout the year. Twenty-one cranes were captured and radio-marked in the Central Platte River Valley in early spring 1998 and 1999. Results to date indicate the technique is well suited for obtaining the types of information being sought. Most of the radio-marked cranes after departing from the Platte River in spring staged again at sites in southern Saskatchewan but those of the Canadian subspecies (G. c. rowan i) breeding in Manitoba and Ontario staged in northwestern Minnesota. Distnbution of radio-marked individuals on the breeding grounds suggests that northeastern Russia may be a more important breeding area for lesser sandhill cranes (G. c. canadensis) than previously thought; 50% of lesser sandhill cranes tagged to date (6 of 12) migrated to locations in northeastern Siberia. Onset offall migration occurred from mid-August to mid-September depending on latitude; fall staging was centered primarily in 3 areas of southern Saskatchewan with fewer radio-marked cranes staging in southwestern Manitoba and central North Dakota. Most radio-marked cranes have spent winter in west Texas, 2 (both G. c. rowani) have occupied sites near the Texas Gulf Coast, and 1 each spent winter at sites in Arizona and New Mexico (both G. c. canadensis breeding in northeastern Siberia). Habitats occupied by cranes are being identified throughout the annual cycle with the aid of GIS methodology ...