A comparison of yellow perch, walleye, and northern pike population characteristics in two saline-eutrophic lakes of southwestern Manitoba

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dc.contributor.authorHopky, G. E.en_US
dc.date.accessioned2009-12-01T20:19:36Z
dc.date.available2009-12-01T20:19:36Z
dc.date.issued1982en_US
dc.degree.disciplineZoologyen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractLake trophy and fish population characteristics were studied in two small saline lakes in southwestern Manitoba during the 1978 and 1979 open-water periods. Greater eutrophy in St. Dalmas Lake (area = 61.3 ha; T.D.S. = 2183 mg.1 -1) compared to S. Thomas Lake (area = 79.2 ha; T.D.S. = 1390 mg.1 -l) was related to highly localized edaphic conditions. A higher mean annual chlorophyll-a concentration and zooplankton biomass was observed in St. Dalmas. Consistent with lake trophic differences, the pooled abundance or biomass of the principal fish species in St. Dalmas (yellow perch Perca flavescens, and walleye Stizostedion vitreum vitreum) was greater than that of those in S. Thomas (northern pike Esox lucius, yellow perch and walleye). Perch predominated in both lakes, but their relative abundance and biomass was greater in St. Dalmas. Mark and recapture experiments showed greater walleye biomass (10.7 kg/ha) in St. Dalmas than the biomass of either S. Thomas walleye (0.9 kg/ha) or pike (5.5 kg/ha). These estimates are comparable to mean values reported for non-saline lake populations. A more diverse piscine community was observed in S. Thomas...en_US
dc.format.extentxi, 174 [i.e. 198] leaves :en_US
dc.format.extent6357565 bytes
dc.format.mimetypeapplication/pdf
dc.identifierocm72777951en_US
dc.identifier.urihttp://hdl.handle.net/1993/3475
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.rightsThe reproduction of this thesis has been made available by authority of the copyright owner solely for the purpose of private study and research, and may only be reproduced and copied as permitted by copyright laws or with express written authorization from the copyright owner.en_US
dc.titleA comparison of yellow perch, walleye, and northern pike population characteristics in two saline-eutrophic lakes of southwestern Manitobaen_US
dc.typemaster thesisen_US
local.subject.manitobayesen_US
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