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Interannual Overlap of Duck Telemetry Locations in California during the fall-winter (October-March) of 2015-16, 2016-17, and 2017-18.

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2021-02-16T00:00:00Z
In this data set, records (rows) represent GPS locations of ducks marked with telemetry in California and whether locations were overlapping (within 300 m of) locations of marked ducks in other consecutive years (2015-16, 2016-17, and 2017-18) during October - March. Years 2015-16, 2016-17, and 2017-18 represented drought, non-drought, and non-drought, respectively. Matchett and company (2020; see Larger Work section for citation) summarized this data set in tables E3 and E4 to compare overlap of duck locations between consecutive years to investigate interannual habitat stability in relationship with drought, habitat management (daytime roosts and night feeding sites), and in two regions (Suisun Marsh and California except Suisun Marsh). Coincident use of space by ducks across years suggests that the landscape is relatively stable, in terms of where and when flooding occurs, or that birds are actively selecting those portions of the landscape that are consistently flooded even in drought years. We additionally thought that areas used in daytime relative to night would be more consistent across years because of reliable water management for sanctuaries on wildlife areas and national refuges used as daytime roosts. We also hypothesized that areas used in Suisun Marsh would be more consistent across years because water availability is less limited by drought in Suisun and most habitats are flooded each year. Data set columns refer to temporal and spatial attributes of locations in relationship with overlapping duck locations. Column 1 is Region (Suisun Marsh or California excluding Suisun Marsh) where locations were recorded, column 2 is Time of day (day or night) that locations were recorded, and column 3 is Year of use (2015-16, 2016-17, 2017-18) referencing a year's locations being compared with all locations recorded in the other two years. Columns 4-6 (Year 2015-16, Year 2016-17, Year 2017-18) reference the years being compared with Year of use to determine interannual overlap in space use.

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