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Natural history and ecology of larval Lost River suckers and larval shortnose suckers in the Williamson River-Upper Klamath Lake System

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dc.contributor.advisor Markle, Douglas F.
dc.creator Cooperman, Michael S.
dc.date.accessioned 2010-05-18T19:07:22Z
dc.date.available 2010-05-18T19:07:22Z
dc.date.copyright 2004-01-28
dc.date.issued 2004-01-28
dc.identifier.uri http://hdl.handle.net/1957/15901
dc.description Graduation date: 2004 en
dc.description.abstract We monitored larval Lost River and shortnose suckers from natal beds in the Williamson and Sprague rivers to nursery grounds in Upper Klamath Lake. Downstream movements occurred at night, in the middle of the channel, and on the falling limb of the hydrograph. Ages, sizes, and developmental stages of larvae from spawning beds and the river mouth were similar, while larvae collected contemporaneously from the lake tended to be larger and better fed. Our results indicate in-river rearing was rare, that a rapid outmigration to the lake was favorable for larval survival, and that modification of the lower Williamson River does not appear to have prohibited rapid entry or preclude access to Upper Klamath Lake. Within the Williamson River and Upper Klamath Lake, emergent macrophytes supported significantly higher abundance, larger mean sizes, and better fed larvae than submerged macrophytes, woody vegetation, or open water areas. Analysis of seven years of larval sucker production and survival corroborated the habitat analysis by identifying a positive relationship with emergent macrophyte availability as well as a positive relationship with air temperature and a negative relationship with high wind. These findings illustrate the importance of fast growth, appropriate habitat and calm hydrological conditions for larvae, and are highly consistent with other larval fish studies. en
dc.language.iso en_US en
dc.relation Explorer Site::Oregon Explorer en
dc.subject.lcsh Catostomidae -- Larvae -- Ecology -- Oregon -- Upper Klamath Lake en
dc.subject.lcsh Catostomidae -- Larvae -- Ecology -- Oregon -- Williamson River en
dc.subject.lcsh Catostomidae -- Larvae -- Ecology -- Oregon -- Sprague River en
dc.title Natural history and ecology of larval Lost River suckers and larval shortnose suckers in the Williamson River-Upper Klamath Lake System en
dc.type Thesis/Dissertation en
dc.degree.name Doctor of Philosophy (Ph. D.) in Fisheries Science en
dc.degree.level Doctoral en
dc.degree.discipline Agricultural Sciences en
dc.degree.grantor Oregon State University en
dc.contributor.committeemember Li, Hiram
dc.contributor.committeemember Grant, Gordon
dc.contributor.committeemember Pereira, Cliff
dc.contributor.committeemember Dunsmoor, Larry
dc.contributor.committeemember Vasconcelo, Carmo
dc.contributor.committeemember Adams, Darius
dc.description.digitization PDF derivative scanned at 300 ppi (256 B&W, 256 Grayscale), using Capture Perfect 3.0.82, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en

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