Status and Harvests of Sandhill Cranes. Mid-Continent and Rocky Mountain Populations, 2002

摘要

The Mid-Continent Population of Sandhill Cranes has been relatively stable since the early 1980s, compared to the dramatic increases that were recorded in the 1970s. The Central Platte River Valley, Nebraska spring index for 2002, uncorrected for visibility bias, was 313,600. The photo-corrected 3-year average for 1999-2001 was 396,167, which is within the established population objective range of 343,000-465,000 cranes. All Central Flyway states, except Nebraska, allowed crane hunting in portions of their respective states during 2001- 02. About 8,650 hunters participated in these seasons, which was 24% higher than the number that participated in the previous years seasons. About 13,964 cranes were harvested in the Central Flyway during the 2001-02 seasons, which was 10% lower than the estimated harvest for the previous year. The retrieved harvest in the Pacific Flyway, Canada, and Mexico combined was estimated to be about 12,381 during 2001-02.