• Login
    View Item 
    •   Summit Institutional Repository Home
    • Theses & Dissertations
    • Department of Biological Sciences
    • View Item
    •   Summit Institutional Repository Home
    • Theses & Dissertations
    • Department of Biological Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Assessing population genetic structure and hatchery introgression in eastern brook trout (salvelinus fontinalis) in the Beebe River Watershed

    Thumbnail
    View/Open
    psu-etd-193.pdf (4.477Mb)
    Date
    10/23/2020
    Keyword
    brook trout; Beebe River (N.H.)
    Metadata
    Show full item record
    Author
    Lamy, Jared B.
    Description
    In northern New England, stream fragmentation is most pervasive in the form of culverts at road crossings, a result of decades of logging. The Beebe River watershed (Campton/Sandwich, NH) is an example of a system that has been impacted by historical land use practices. Access to ten kilometers of headwater habitat was blocked by four undersized culverts, preventing Eastern Brook Trout (Salvelinus fontinalis) from accessing valuable spawning habitat and thermal refugia, as well as isolating populations above crossings. In September of 2017, an extensive restoration project replaced the culverts with stringer bridges, reconnecting streams that had been fragmented for decades. This restoration presented a unique opportunity to examine Brook Trout population genetic structure before and after restoration to develop an understanding of the success of the project in terms of its benefits to the persistence of Brook Trout. Prior to restoration in 2016, fin-clips (n=309) were collected via backpack electrofishing from throughout the watershed and genotyped at twelve microsatellite loci. Assignment analysis suggests populations above culverts belong to distinct genetic clusters. In contrast, results from non-fragmented tributaries suggest admixture is occurring where individuals are physically able to move throughout the watershed. Analysis of genotypes collected in 2018 (n=250) suggests minimal change in population structure post-restoration. Because the Beebe River watershed is heavily stocked with hatchery raised Brook Trout, the degree to which introgression of hatchery genetics into wild populations occurs is also being examined. Results suggest significant introgression has occurred throughout the study area.
    Identifier
    psu-etd-193
    URI
    https://summit.plymouth.edu/handle/20.500.12774/393
    Rights
    http://rightsstatements.org/vocab/InC/1.0/
    Collections
    • Department of Biological Sciences

    Browse

    All of Summit Institutional RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    DSpace software copyright © 2002-2023  DuraSpace
    Contact Us | Send Feedback
    DSpace Express is a service operated by 
    Atmire NV