Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 67 for “"Lepomis macrochirus"”.
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Selected experiments on growth and food conversion efficiency of bluegill, Lepomis macrochirus
Experiments were conducted to determine the effect of aquarium volume and feeding regimen on growth in length and weight and on food conversion efficiency by bluegill fed rations of mealworms. Two 30 day periods were utilized for each study. Part one, which examined the effect of aquarium volume on …
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Effects of exogenous androgens on parental care behaviour in male bluegill sunfish (Lepomis macrochirus)
… androgen levels in bluegill sunfish (Lepomis macrochirus), a species where males provide sole parental care. I implanted males with testosterone, 11-ketotestosterone or flutamide, an androgen receptor blocker, and tested their nurturing behaviour and aggressiveness towards a brood …
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Comparison of biomonitoring techniques for evaluating effects of jet fuel on bluegill sunfish (Lepomis macrochirus)
… blood enzymes and ions of the bluegill sunfish (Lepomis rnacrochirus) to determine possible interrelationships and which procedures might be most descriptive of sublethal stress. The dynamic 96-h LCSO for WSF JP-4 was 26.2% (percent of the maximum soluble amount of JP-4). A concentration of 5.1% …
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Interactions of temperature and sublethal environmental copper exposure on the energy metabolism of bluegill (Lepomis macrochirus)
… on metabolism were in vestigated in bluegill (Lepomis macrochirus) by measuring whole body oxygen consumption in fish exposed to sublethal copper alone and in conjunction with a temperature increase. In vitro oxygen consumptions of liver, brain, and gill were also measured under these two …
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Effects of the Exotic Cladoceran Daphnia Lumholtzi (Sars) on the Growth Rate and Prey Selection of Bluegill Sunfish (Lepomis Macrochirus Rafinesque)
Daphnia lumholtzi, a large cladoceran native to the Old World tropics, has recently invaded lakes in the southern U.S. this invasion has provided a unique opportunity to study its effects on native fish. Prior research has shown the presence of D. lumholtzi interferes with the feeding of larval …
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A test of the effects of androgens on immunity: no relationship between 11-keto testosterone and immune performance in bluegill sunfish (Lepomis macrochirus)
… (ICHH). My thesis uses bluegill sunfish (Lepomis macrochirus) to test two predictions arising from this hypothesis: (1) natural concentrations of the androgen 11-keto testosterone (11-KT) will be negatively related with immunity, and (2) an immunochallenge will lower 11-KT concentration. I …
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The Influence of Population and Community Variables on Bluegill, Lepomis Macrochirus, Life Histories: Implications for Growth Rates, Timing-of-Maturation, and Population Size Structure
… of experiments to examine aspects of bluegill, Lepomis macrochirus, life histories in an attempt to quantify variables influencing growth and maturation rates of individuals, and to examine the individual- and population-level consequences of variable life-history strategies. First, I examined …
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Analysis of the impact of flathead catfish predation on the abundance of four centrarchid species
… are centrarchids, specifically bluegill Lepomis macrochirus, redbreast sunfish L. auritus, smallmouth bass Micropterus dolomieu, and spotted bass M. punctulatus. A bioenergetics model was used to estimate the number of age-l and older centrarchids consumed annually by the flathead catfish …
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Effects of interspecific competition, salinity, and hurricanes on the success of an invasive fish, the Rio Grande cichlid (Herichthys cyanoguttatus)
… GNOMA, how H. cyanoguttatus interacted with L. macrochirus, a native fish, and what salinity tolerance this species has. Surveys on Lake Pontchartrain and in the GNOMA indicated that H. cyanoguttatus is well established in urban habitats. These surveys also indicate that H. cyanoguttatus has …
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The importance of bluegill feeding behavior within an automated biological monitoring system for industrial wastes
… of industrial effluents. Measurements of fish (Lepomis macrochirus, Rafinesque) activity, as well as respiration, were employed as indicators of toxicity. Prior to this study, fish used within the system were unfed throughout the duration of an experiment, and casual observations indicate the …
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Predators alter host-parasite interactions via trait-mediated indirect effects
… of the zooplankter Daphnia, Bluegill sunfish (Lepomis macrochirus) and larvae of the phantom midge fly Chaoborus punctipennis, to observe how predator presence altered Daphnia traits. These trait changes were predicted to influence the interaction between Daphnia and Metschnikowia bicuspidata, …
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Carbachol-Induced Pigment Granule Dispersion
… rods to incoming light. Using isolated bluegill (Lepomis macrochirus) RPE, I examined the effects that carbachol and acetylcholine analog, has on pigment granule dispersion in a dose-dependent manner, and the maximum effects of carbachol were observed at concentrations as low as 10 nM. Atropine …
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Trophic Interactions And The Efficacy Of Milfoil Weevils For Biocontrol Of Eurasian Watermilfoil In Wisconsin Lakes
… associated with EWM plus 442 bluegill (Lepomis macrochirus Rafinesque) diet samples from the 4 study lakes. Overall, chironomids and oligochaetes were the dominant invertebrates associated with plants, while chironomids and Daphnia spp. constituted up to 27.2% and 24.0% of the fish …
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A study of lethality and toxic mechanisms of intermittent chlorination to freshwater fish
… with temperature to a warmwater fish, bluegill (Lepomis macrochirus) was investigated with the support of the American Electric Power Corporation. Because relatively little is known about the physiological effects of intermittent chlorination on fish, a study of this problem was performed using …
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The use of bioelectrical impedance analysis for estimating the body composition of various fish species
… estimated the body composition of bluegill Lepomis macrochirus, redear sunfish Lepomis microlophus, brook trout Salvelinus fontinalis, and northern logperch Percina caprodes (r2 ≥ 0.71, p < 0.0001). I also determined that bluegill and redear regressions were not significantly different (P ≥ …
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Assessment of the Effects of Habitat, Harvest and Community Interactions on the Abundance of Walleye Sander Vitreus in Inland Lakes Throughout Ontario
… R2=0.45, p<0.001). The presence of bluegill (Lepomis macrochirus) and smallmouth bass (Micropterus dolomeiu) were significant negative predictors in the top model (αbluegill = -1.54, partial r2=0.1; αsmallmouth = -0.28, partial r2=0.03). In many studies, smallmouth bass have also been found to …
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Growth and Survival of Largemouth Bass in Newly Stocked South Dakota Impoundments
… black bullhead (Ictalurus melas), and bluegill (Lepomis macrochirus). Bass only stocking was also evaluated. First eyar survival values for 16 eastern South Dakota ponds ranged from 1 to 100%, with a mean of 50.2%. Bass exhibited poorest survival when stocked with black bullheads. Analysis of …
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Daphnia Diel Vertical Migration and Chemical Cues from Fish Predators
… released by three different fish species—Lepomis macrochirus (bluegill sunfish), Lepisosteus osseus (longnose gar), and Pimephales promelas (fathead minnow). Light had a significant effect on lowering Daphnia position in the last set of trials and limited data suggest this light effect was …
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