Trap records used to analyze trends in mammalian predator control trapping events intended to protect ground-nesting, endangered birds at Haleakal? National Park, Hawai'i (2000 - 2014)

Predation and habitat degradation by non-native species are principal terrestrial threats to the federally endangered Hawaiian Petrel ('ua'u, Pterodroma sandwichensis) and Hawaiian Goose (nene, Branta sandvicensis) within Haleakala National Park (HALE), Maui, Hawai'i. Since 1981, HALE has maintained a network of live-traps to control invasive mammalian predators and protect these endangered birds. To continue evaluations of trapping efficiency in HALE, we analyzed 2000 - 2014 trap events. Trap events were divided up into six event types classified into three event categories: no event, other event [bait lost, or trap triggered], or predator event [rat, cat, or mongoose caught]. Event type analysis was divided up for temporal and spatial analysis. Temporal variables included month, year, 'Ua'u Season (off-season, pre-laying, incubation, or nestling), and Trapline (15 different traplines throughout HALE). Temporal variables were also compared to climate variables (Longman et al. 2015) and moon phase. Spatial variables included the number of 'Ua'u burrows around the trap, the distance to roads, trails, fences and other structures, elevation, slope, and vegetation class and cover (derived from HALE unpublished data and LANDFIRE [Landfire, 2010]). These data support the following publication: Kelsey, E.C., Adams, J., Czapanskiy, M.F., Felis, J.J., Yee, J.L., Kaholoaa R.L., and Natividad Bailey, C., 2019, Trends in mammalian predator control trapping events intended to protect ground-nesting, endangered birds at Haleakala National Park, Hawai'i: 2000-14: U.S. Geological Survey Open-File Report 2019-1122, 27 p., https://doi.org/10.3133/ofr20191122. References: Landfire, 2010, Existing Vegetation Type Layer, Existing Vegetation Cover Layer, Elevation Layer, Slope Layer, LANDFIRE 1.3.0, U.S. Department of the Interior, Geological Survey. Accessed 24 October 2016 at http://landfire.cr.usgs.gov/viewer/. Longman, R. J., T. W. Giambelluca, M. A. Nullet and L. L. Loope. 2015. Climatology of Haleakala.