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Annual production and population dynamics of a relatively unexploited walleye, Stizostedion vitreum vitreum (Mitchill 1818), population in Savanne Lake, Ontario
(1979)Most studies of the walleye have been conducted on highly exploited populations. Savanne Lake in northwestern Ontario, and having an area of 364.29 ha, was exploited until 1969, whereupon it was designated a fish ... -
Community dynamics resulting from an experimental pulse fishery on the walleye (Stizostedion vitreum vitreum Mitchill) in Henderson Lake
(1988)Henderson Lake is a small 151 ha boreal percid lake approximately 128km northwest of Thunder Bay. A pulse fishery conducted from 1980 to 1982 inclusively, removed 3226 walleye reducing the stock to very low levels (Reid, ... -
Comparison of the yellow perch, Perca flavescens Mitchell, populations in Henderson Lake and Savanne Lake, Ontario
(1984)Yellow perch (Perca flavescens) in Henderson Lake exhibit stunted growth and poor condition at all ages. In addition, they have lower fecundity, longer life span, slower maturation rate, and greater survival compared ... -
Detecting trends in walleye (Stizostedion v. vitreum, Mitchill) abundance using catch-effort data
(1995)Three methods of analyzing catch-effort data were investigated regarding their relationship to walleye abundance: mean CUE, Gini coefficient and the relative frequency of zero CUE (RFZ). Walleye recreational fishery ... -
Development of a protocol to profile the gonadal steroid intermediates of vitellogenic ovaries from fathead minnows, pimephales promelas
(1996)This research developed a protocol to extract, isolate, detect, and measure the intermediates involved in ovarian steroid biosynthesis by Pimephales promelas to be used in bleached kraft mill effluent chronic toxicity ... -
Development of a toxicity early warning system (TEW)
(2006)Biomonitoring is a practice that has over time developed into a remarkably accurate form of detecting toxicity in the environment. The Toxicity Early Warning system (TEW) is a Real-Time Biomonitoring system developed to ... -
Distribution of fishes in the Thunder Bay area of northwestern Ontario since deglaciation, with special reference to the darters (Genus Etheostoma) and the Sibley Peninsula
(1991)The prevailing theory explaining fish distribution in the western Lake Superior basin states that recolonization was from south to north following the retreating ice margins. Postulated access to post glacial Lake Superior ... -
Dynamics of a polyphagous lake trout, Salvelinus namaycush (Walbaum), population in a Northwestern Ontario lake
(1988)Tagging studies, index gill netting and an experimental winter fishery were used to investigate the dynamics of a polyphagous lake trout (Salvelinus namaycush population in Squeers Lake of northwestern Ontario. The ... -
Ecology of a northern pike (Esox Iucius) population in a small, oligotrophic Lake : with comparisons to other northwestern Ontario populations
(1988)The life history and population dynamics of the northern pike (Esox lucius) within Squeers Lake, Ontario were studied in order to provide information on pike found within oligotrophic lakes. Results clearly demonstrate ... -
Ecology of forage fish following cessation of overharvest of walleye in Henderson Lake, Ontario
(1988)I examined the forage base of Henderson Lake, Ontario following collapse of its walleye stock due to overexploitation, and an inexplicable decline of the ninespine stickleback population. In response to these events a ... -
Ecology of northern pike, Esox lucius Linnaeus, in Savanne Lake, Ontario
(1980)Important aspects of the life history and population dynamics of the northern pike, Esox lucius, in Savanne Lake, Ontario were studied during 1977 and 1978. Feeding relationships involving northern pike and walleyes, ... -
Effects of an episodic removal scheme on a walleye, stizostedion vitreum vitreum, population
(1985)A pulse fishing scheme, applied over a three year period (1980 to 1982), deliberately removed 3226 walleye from Henderson Lake, Ontario, causing the stock to collapse. The objective of the removal was not only to seek ... -
Effects of depressed pH on survival, growth and reproduction of brook trout, Salvelinus fontinalis (Mitchill)
(1977)Brook trout were continuously exposed to depressed pH values from 4.0 to 6.0, at 0.5 unit Intervals during a nine-month partial-chronic bloassay. At all pH levels above 4.0, Juvenile fish exhibited greater than 96 per ... -
Effects of selected biotic and abiotic factors on growth and survival of young crayfish, Orconectes virilis (Hagen)
(1988)The growth and survival of Orconectes virilis young was studied in 50 x 50 x 50 cm lake enclosures during the summer seasons of 1986 and 1987. The effects of density (12/m2, 40/m2, 160/m2), substrate (mud, sand, ... -
Factors that predict brook trout distribution, thermal habitat, and abundance in Northwestern Ontario streams
(1995)Predictive models were developed to improve the understanding of stream-resident brook trout (Salvelinus fontinalis) populations and habitat in northwestern Ontario, and to facilitate protection of stream-resident brook ... -
Initial effects of the exploitation of walleye, Stizostedion vitreum vitreum (Mitchill) on the boreal percid community of Henderson Lake, Northwestern Ontario
(1982)The effect of large scale exploitation of walleye Stizostedion vitreum vitreum on the boreal percid community of Henderson Lake, northwestern Ontario, was studied from 1979 to 1981. Investigations centered on the two major ... -
Population dynamics of an exploited population of Orconectes virilis in Northwestern Ontario
(1987)Exploitation of northern stocks of the crayfish Orconectes virilis (Hagen) produced significant alterations in several population parameters. High fishing efforts increased per capita fecundity, young-of-year (YOY) ... -
Production ecology of the amphipod Hyalella azteca (Saussure) in a Northern Ontario lake
(1982)Annual production of the amphipod Hyalella azteca was estimated in the upper littoral zone of Dock Lake, Ontario, over a 2 year period (1980-1981). Population density (negligible below 1 meter) differed among the three ... -
Pulse fishing of a walleye population : response, recovery and management implications
(1997)The response of the Henderson Lake boreal fish community to a large scale exploitation of walleye was studied. The pulse fishery removed approximately 89 percent (3226) of adult walleye (1980-82) from Henderson lake ... -
The 96-hr LC50 and uptake of sodium tellurite in goldfish (Carrasius auratus)
(1992)There is no information regarding toxicity of tellurium in fish. This research used goldfish (Carassius auratus) as an animal model, and sodium tellurite ( Na2Te03) as the form of tellurium to tested. Acute 96-hr LC50 ...