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Using light-level geolocators to measure breeding propensity of mottled ducks in the Western Gulf Coast


2017-08-22 17:40:11
Last Update
2018-12-19 06:00:00
Start Date
End Date
2020-06-30 05:00:00
Start Date
2017-10-01 16:57:45
End Date
2020-06-30 16:57:45


LCC Network Data Steward(Point of Contact), David Butler(Co-Investigator), Joseph Marty(Co-Investigator), Vaughan McDonald(Co-Investigator), Stephen McDowell(Co-Investigator), Jena Moon(Co-Investigator), Michael Brasher(Principal Investigator), 2017-08-22(creation), 2018-12-19(lastUpdate), 2018-10(Start), 2020-06-30(End), Using light-level geolocators to measure breeding propensity of mottled ducks in the Western Gulf Coast,


Of the vital rates that determine recruitment, breeding propensity (i.e., the proportion of females that lay at least one egg) and nest success appear to have the greatest influence, but breeding propensity remains poorly studied. The few studies that have been conducted reveal it to be highly variable among years (15–77%), likely in response to environmental conditions (e.g., precipitation and wetland availability), and lower than estimates from other dabbling ducks. Thus, quantifying breeding propensity across the mottled duck range in the WGC and identifying factors responsible for its variation remain high priorities for future investigation. Breeding propensity is also among the most difficult vital rates to study, as it typically [...]

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The Western Gulf Coast (WGC) is home to approximately 90% of the worldwide population of mottled ducks (Anas fulvigula), a non-migratory species that must satisfy its annual cycle needs within a small geographic range. Available population survey data suggest the WGC mottled duck population has experienced a long-term steep decline in Texas, is stable or slightly increasing in Louisiana, and is stable to declining across the entire WGC range. Because of its population status and reliance on a restricted geography, the mottled duck has been identified as a focal species for the U.S. Fish and Wildlife Service and Gulf Coast Prairie Landscape Conservation Cooperative, a priority species in the Texas and Louisiana Comprehensive Wildlife Conservation Plans, and the subject of targeted conservation efforts by other regional conservation partnerships (e.g., Gulf Coast Joint Venture). Conversion and degradation of wetland and upland habitats are believed largely responsible for historical declines in mottled duck abundance; hence, habitat conservation activities that have greatest impacts on influencing vital rates are priority strategies for Gulf Coast conservation partners.

Project Extension


Budget Extension

recipientDucks Unlimited, Inc.
sourceU.S. Fish and Wildlife Service


Spatial Services

ScienceBase WMS


  • Gulf Coast Prairie Landscape Conservation Cooperative
  • LC MAP - Landscape Conservation Management and Analysis Portal

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gov.sciencebase.catalog 599c6c7be4b0b589267ed748

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