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    • Grass Carp Response Program Database

    Metadata Updated: April 14, 2026

    The U.S. Fish and Wildlife Service (FWS) Grass Carp Response (GCR) Program is a component of the Alpena Fish and Wildlife Conservation Office (FWCO), Green Bay FWCO, and Lower Great Lakes FWCO Aquatic Invasive Species Program(s). GCR staff work in collaboration with federal, state, and university partners to conduct Grass Carp (Ctenopharyngodon idella) surveillance, response, and removal efforts in the Great Lakes basin (Lake Erie, Lake Huron, Lake Michigan, and Lake Ontario). This project will result in the removal of diploid and triploid Grass Carp, preventing Grass Carp from attaining densities capable of adversely affecting vegetated habitats, ecosystem functions, and associated fish communities. Grass Carp surveys have been conducted annually since 2018 (April-December). Sampling efforts have focused on identified spawning locations (i.e., Maumee and Sandusky rivers of Ohio) and tributaries with adequate thermal/ hydrological regimes that may be suitable for spawning. Standardized field protocols have been developed for each type of response effort utilized by field teams (i.e., Spawning, Sustained, and Targeted). Grass Carp are captured using boat electrofishing, gill nets, hoop nets, and trammel nets. Grass Carp are tagged/ released with acoustic transmitters or are harvested. Blood samples are collected from each Grass Carp and are sent to the FWS La Crosse Fish Health Center for ploidy analysis. All carcasses are sent to an assigned laboratory for fish processing, to support various research projects (e.g., age estimation, diet metabarcoding, otolith microchemistry/ stable isotope analysis). Sampling focus, protocols, and priority locations are determined by the Grass Carp Advisory Committee (GCAC), a sub-committee of the Lake Erie Committee (LEC), (https://www.glfc.org/grass-carp-advisory-committee.php) and contributes to the shared goals of the Invasive Carp Regional Coordinating Committee (ICRCC) (https://invasivecarp.us/PlansReports.html)

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date April 14, 2026
    Metadata Updated Date April 14, 2026

    Metadata Source

    Harvested from DOI FWS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 14, 2026
    Metadata Updated Date April 14, 2026
    Publisher U.S. Fish and Wildlife Service
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/FWS_ServCat_175057
    Data First Published 2026-03-31T00:00:00Z
    Data Last Modified 2026-03-31T00:00:00Z
    Category Tabular Dataset
    Public Access Level public
    Bureau Code 010:18
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/fws-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 45060c86-a1f5-4012-a7af-692790143b6c
    Harvest Source Id f51f1f6c-4e4a-4e0a-b4e3-a5577c6dcc19
    Harvest Source Title DOI FWS DCAT-US
    Homepage URL https://iris.fws.gov/APPS/ServCat/Reference/Profile/175057
    Old Spatial -92.57373,41.1492348,-75.52295,49.8127747
    Program Code 010:028, 010:094
    Source Datajson Identifier True
    Source Hash 265c46b2a1d1428a7b93071d2ed02922d6702eaa3ee900875f07e6a312b764b6
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -92.57373, 41.1492348, -92.57373, 49.8127747, -75.52295, 49.8127747, -75.52295, 41.1492348, -92.57373, 41.1492348}
    Temporal 2020-01-01/2025-01-01

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