Larval fish abundance and habitat associations in backwaters and main channel borders of the Kanawha River

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dc.contributor.authorScott, Mark Thomasen
dc.contributor.committeechairNielsen, Larry A.en
dc.contributor.committeememberGiles, Robert H. Jr.en
dc.contributor.committeememberOrth, Donald J.en
dc.contributor.departmentFisheries and Wildlife Sciencesen
dc.date.accessioned2014-03-14T21:50:29Zen
dc.date.adate2012-11-21en
dc.date.available2014-03-14T21:50:29Zen
dc.date.issued1988-11-15en
dc.date.rdate2012-11-21en
dc.date.sdate2012-11-21en
dc.description.abstractLarval fish distributions were determined in the lower Winfield Pool, Kanawha River, West 85, Virginia, using a 0.5-m plankton net and a 1-m<sup>2</sup> dropbox. Five habitats were sampled with the plankton net, 3 habitats with the dropbox. The 5 deep water water habitats, greater than 1.5-m in depth, sampled by the plankton net included surface tows in Bill's Creek backwater, main channel border upstream and downstream of Little Guano backwater, and Little Guano Creek backwater, where deep tows (1.5 m deep) were also taken. The 3 shallow water habitats, less than 1 m in depth, sampled by the dropbox included open water over silt substrate, open water over a sand substrate, and emergent vegetation. <i>Lepomis</i> species, emerald shiners (<i>Notropis atherinoides</i>), and gizzard shad (<i>Dorosoma cepedianum</i>) were the dominant taxa. The emerald shiner taxa could also have included some larvae of <i>Notropis</i> species which are also present in the Kanawha River but whose larvae have not been described. Overall, the mean total larval density did not differ between the backwater or the main channel borders but the species associated with each habitat differed greatly. The <i>Lepomis</i> larvae were found predominantly in backwater areas. These areas provide suitable spawning sites for many centrarchids of this river. Upon leaving the nest, the <i>Lepomis</i> larvae moved into the deeper open water areas within the backwater. After reaching the juvenile stage, these same larvae returned to the shallow water habitats where they inhabited vegetated areas. Emerald shiner larvae, while present in both backwater and main channel habitats, were most abundant in the main channel borders. This is probably a result of their parent's pelagic spawning strategy. In all habitats, emerald shiner larvae predominated in the upper 1 m of water. Upon becoming larger, the emerald shiner larvae appeared in the backwaters. This increase in numbers could be due to movement, differential mortality, or higher growth rates. Other cyprinids (excluding emerald shiners and carp) were equally abundant in both backwater and main channel areas. These other cyprinid larvae were also distributed equally, Gizzard shad larvae were found predominantly in the main channel borders. Presumably, these higher densities were the result of main channel spawning. The gizzard shad larvae present in the backwater areas were distributed evenly throughout the water column. Overall, the backwaters were important for the nest-building species found in the river and also for the larger larvae of the pelagic species, and thus acts as a nursery area for these species. Therefore, the backwaters do seem to be important for the fishery of the Kanawha River.en
dc.description.degreeMaster of Scienceen
dc.format.extentx, 100 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11212012-040243en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11212012-040243/en
dc.identifier.urihttp://hdl.handle.net/10919/45967en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1988.S365.pdfen
dc.relation.isformatofOCLC# 19254770en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1988.S365en
dc.subject.lcshFishes -- Larvae -- West Virginia -- Kanawha Riveren
dc.titleLarval fish abundance and habitat associations in backwaters and main channel borders of the Kanawha Riveren
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineFisheries and Wildlife Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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