Exploiting behaviour to enhance selective fish passage in the Laurentian Great Lakes: two experimental tests

dc.contributor.advisorMcLaughlin, Robert
dc.contributor.authorHellmuth, Aliana
dc.date.accessioned2022-05-06T15:40:01Z
dc.date.available2022-05-06T15:40:01Z
dc.date.copyright2022-05
dc.date.created2022-04-14
dc.degree.departmentDepartment of Integrative Biologyen_US
dc.degree.grantorUniversity of Guelphen
dc.degree.nameMaster of Scienceen_US
dc.degree.programmeIntegrative Biologyen_US
dc.description.abstractIn-stream barriers are controversial features in rivers, because they impede the movement and production of native and recreational (desirable) fishes, while their removal can permit the dispersal and proliferation of invasive species. Selective fish passage can eliminate this controversy by restoring movement for desirable fishes while preventing the movement of invasive species. Manually sorting fishes to achieve this is selective passage is effective, but is labour-intensive and costly, which establishes a need to evaluate technologies where fishes are passively or self-sorted. I completed two experimental field tests to evaluate if passive sorting of desirable fishes from invasive sea lamprey (Petromyzon marinus) could be improved by manipulating discharge (high or low) through a size-selective fishway, and by manipulating the configuration of a funnel (curved or straight) separating sorting chambers within the fishway. Increased discharge and addition of a curved funnel did not improve passive sorting, but daily total catches of desirable fishes and sea lamprey differed between discharge treatments in ways that could create sorting opportunities. My findings support that identifying singular passive sorting mechanisms could be challenging, and that there may be more success in combining multiple sorting technologies within a fishway.en_US
dc.description.sponsorshipGreat Lakes Fisheries Commission
dc.description.sponsorshipFisheries and Oceans Canada
dc.identifier.urihttps://hdl.handle.net/10214/26903
dc.language.isoenen_US
dc.publisherUniversity of Guelphen
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectsea lampreyen_US
dc.subjectmanagementen_US
dc.subjectbarriersen_US
dc.subjectfishwaysen_US
dc.subjectGreat Lakesen_US
dc.titleExploiting behaviour to enhance selective fish passage in the Laurentian Great Lakes: two experimental testsen_US
dc.typeThesisen

Files

Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Hellmuth_Aliana_202205_MSc.pdf
Size:
7.39 MB
Format:
Adobe Portable Document Format
Description:
Thesis