Skip to main content
U.S. flag

An official website of the United States government

Anna Tucker, PhD

Assistant Unit Leader - Iowa Cooperative Fish and Wildlife Research Unit

Science and Products

Optimal strategies for managing wildlife harvest under climate change

Wildlife populations are experiencing shifting dynamics due to climate and landscape change. Management policies that fail to account for non‐stationary dynamics may fail to achieve management objectives. We establish a framework for understanding optimal strategies for managing a theoretical harvested population under non‐stationarity. Building from harvest theory, we develop scenarios representi
By
Ecosystems, Eastern Ecological Science Center, Patuxent Wildlife Research Center
link
Image: Red Knots at Delaware Bay

Red Knot Migration and Population Ecology

Eastern Ecological Science Center biologists are studying migration and population ecology of the rufa red knot, a bird species that is dependent on horseshoe crab eggs to complete its trans-hemispheric migration. The birds' spring migration is timed with spawning of horseshoe crabs because the eggs are the perfect food for a migrating red knot.
By
Ecosystems, Cooperative Research Units, Species Management Research Program, Eastern Ecological Science Center
link

Red Knot Migration and Population Ecology

Eastern Ecological Science Center biologists are studying migration and population ecology of the rufa red knot, a bird species that is dependent on horseshoe crab eggs to complete its trans-hemispheric migration. The birds' spring migration is timed with spawning of horseshoe crabs because the eggs are the perfect food for a migrating red knot.
Learn More
link
Riparian birds

Informing Management of Waterfowl Harvest in a Changing Climate

The ability to effectively manage wildlife in North America is founded in an understanding of how human actions and the environment influence wildlife populations. Current management practices are informed by population monitoring data from the past to determine key ecological relationships and make predictions about future population status. In most cases, including the regulation of waterfowl hu
By
Climate Adaptation Science Centers
link

Informing Management of Waterfowl Harvest in a Changing Climate

The ability to effectively manage wildlife in North America is founded in an understanding of how human actions and the environment influence wildlife populations. Current management practices are informed by population monitoring data from the past to determine key ecological relationships and make predictions about future population status. In most cases, including the regulation of waterfowl hu
Learn More

Integrated population model for red knot in Delaware Bay

This is code for an integrated population model developed to understand the effect of horseshoe crab abundance on population demographics of red knot, an Arctic-breeding shorebird. This model was developed as part of the revision to the Atlantic States Marine Fisheries Commission Adaptive Resource Management Plan for horseshoe crabs.
By
Cooperative Research Units

Optimal horseshoe crab harvest policies via approximate dynamic programming

Approximate Dynamic Programming relies on forward simulation of the system, so two population projection models are used, one for crabs and one for red knots. The two models are linked: HSC abundance is a predictor variable in the REKN model. Other useful outputs are produced as well, such as predictions of future harvest.
By
Cooperative Research Units

Science and Products

  • Publications

    Optimal strategies for managing wildlife harvest under climate change

    Wildlife populations are experiencing shifting dynamics due to climate and landscape change. Management policies that fail to account for non‐stationary dynamics may fail to achieve management objectives. We establish a framework for understanding optimal strategies for managing a theoretical harvested population under non‐stationarity. Building from harvest theory, we develop scenarios representi
    By
    Ecosystems, Eastern Ecological Science Center, Patuxent Wildlife Research Center
  • Science
    link
    Image: Red Knots at Delaware Bay

    Red Knot Migration and Population Ecology

    Eastern Ecological Science Center biologists are studying migration and population ecology of the rufa red knot, a bird species that is dependent on horseshoe crab eggs to complete its trans-hemispheric migration. The birds' spring migration is timed with spawning of horseshoe crabs because the eggs are the perfect food for a migrating red knot.
    By
    Ecosystems, Cooperative Research Units, Species Management Research Program, Eastern Ecological Science Center
    link

    Red Knot Migration and Population Ecology

    Eastern Ecological Science Center biologists are studying migration and population ecology of the rufa red knot, a bird species that is dependent on horseshoe crab eggs to complete its trans-hemispheric migration. The birds' spring migration is timed with spawning of horseshoe crabs because the eggs are the perfect food for a migrating red knot.
    Learn More
    link
    Riparian birds

    Informing Management of Waterfowl Harvest in a Changing Climate

    The ability to effectively manage wildlife in North America is founded in an understanding of how human actions and the environment influence wildlife populations. Current management practices are informed by population monitoring data from the past to determine key ecological relationships and make predictions about future population status. In most cases, including the regulation of waterfowl hu
    By
    Climate Adaptation Science Centers
    link

    Informing Management of Waterfowl Harvest in a Changing Climate

    The ability to effectively manage wildlife in North America is founded in an understanding of how human actions and the environment influence wildlife populations. Current management practices are informed by population monitoring data from the past to determine key ecological relationships and make predictions about future population status. In most cases, including the regulation of waterfowl hu
    Learn More
  • Software

    Integrated population model for red knot in Delaware Bay

    This is code for an integrated population model developed to understand the effect of horseshoe crab abundance on population demographics of red knot, an Arctic-breeding shorebird. This model was developed as part of the revision to the Atlantic States Marine Fisheries Commission Adaptive Resource Management Plan for horseshoe crabs.
    By
    Cooperative Research Units

    Optimal horseshoe crab harvest policies via approximate dynamic programming

    Approximate Dynamic Programming relies on forward simulation of the system, so two population projection models are used, one for crabs and one for red knots. The two models are linked: HSC abundance is a predictor variable in the REKN model. Other useful outputs are produced as well, such as predictions of future harvest.
    By
    Cooperative Research Units