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Showing 1 to 20 of 94 for “"bluegill"”.
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Bluegill Reproductive Characteristics in Nebraska Sandhill Lakes
Bluegill Lepomis macrochirus reproductive biology was evaluated in two Nebraska Sandhill lakes, 323-ha Pelican Lake in Cherry County and 38-ha Cozad Lake in Brown County, during 1998. Catch per unit effort of stock-length bluegills in trap nets did not differ between lakes (P=0.19). Proportional …
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Food selectivity of Bluegill and Green Sunfish Fry
… as food to green sunfish (Lepomis cyanellus) and bluegill (Lepomis macrochirus) fry, to examine their food selectivity. Green sunfish and bluegill fry ranged in size from 8.5-11.0 mm and 8.0-10.5 mm at stocking and were reared for 31 and 30 days, respectively. The gut contents of 1488 green …
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Quantifying genomic diversity and growth in Iowa bluegill
1 PDF file (vi, 44 pages)
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The acute toxicity of molybdenum to the bluegill
… TLm value for molybdenum as sodium molybdate to bluegills was determined as 1320 ppm molybdenum in ion-free water.
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Bluegill Reproductive Biology and Population Dynamics in Four South Dakota Impoundments
The bluegill Lepomis macrochirus is an important prey species and important sport fish. Therefore, knowledge of reproduction and subsequent recruitment is essential for fishery biologists. Bluegill are typically considered multiple spawners. Protracted reproduction is likely a response to various …
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Selected experiments on growth and food conversion efficiency of bluegill, Lepomis macrochirus
… 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 growth extended from January 20 to February 18 and from March 27 to April 25, 1972. Part two, which …
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Evaluation of Largemouth Bass and Bluegill Stocking Strategies in South Dakota Ponds
… on largemouth bass (Micropterus salmoides) and bluegill (Lepomis macrochirus) survival, growth, and reproductive success during 1983-1985. Two densities of split-stocking largemouth bass with bluegills were compared to the simultaneous introduction of both species. First-year largemouth bass …
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Bighead Carp effects on the growth, abundance, and survival of larval Bluegill
… Shiners (Notemigonus crysoleucas), and larval Bluegill (Lepomis macrochirus). My first experiment involved investigating the growth of larval Bluegill at varying densities of either Bighead Carp or Golden Shiners in a controlled mesocosm setting. The results of this experiment inconsistently …
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Monitoring bluegill swimming behavior and the effects of sublethal ammonium chloride gradients
… The standard (control) swimming behavior of bluegills, Lepomis macrochirus, Raf., in the system was characterized in terms of activity, turning and spatial selection parameters over periods of 3 to 4 days and at two temperatures, 5 and 22 °C. Activity started at high levels on Day 1 and …
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Effects of exogenous androgens on parental care behaviour in male bluegill sunfish (Lepomis macrochirus)
… trade-off by manipulating 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 …
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Recruitment of Bluegill and Yellow Perch in Nebraska Sandhills Lakes: Integrating Multiple Life Stages
Bluegill Lepomis macrochirus and yellow perch Perca flavescens are important, native sport fishes to Nebraska Sandhills lakes. Recruitment dynamics of the fish populations within a given community will ultimately structure the fish communities. I conducted a multiple life-stage investigation of …
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The importance of bluegill feeding behavior within an automated biological monitoring system for industrial wastes
Cairns et al. (1973) described a biological monitoring system designed to detect sublethal levels 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 …
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Comparison of biomonitoring techniques for evaluating effects of jet fuel on bluegill sunfish (Lepomis macrochirus)
… behavior, and 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 …
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Bluegill Seasonal Habitat Selection, Movement, and Relationship to Angler Locations in a South Dakota Glacial Lake
… full of research examining habitat selection of bluegills Lepomis macrochirus, most studies have utilized small (<150 mm) fish in laboratory or small pond experiments. Those few studies that have examined larger bluegills in natural systems have generally occurred over a relatively short time …
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Role of 11-ketotestosterone, testosterone, and prolactin in the expression of reproductive behaviors by male bluegill
"The bluegill (Lepomis macrochirus), has a complex mating system which includes two male life histories--delayed maturity involving ""parental"" breeding behavior and precocious maturity involving ""cuckoldry"". Unlike cuckolders, members of the parental life history build nests and provide …
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Interactions of temperature and sublethal environmental copper exposure on the energy metabolism of bluegill (Lepomis macrochirus)
… copper 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 …
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Fish fins and fast-starts: Multi-level analyses reveal functional variation within median fins of bluegill sunfish.
… fin-rays within the dorsal and anal fins of the bluegill sunfish, Lepomis macrochirus. Examining several musculoskeletal features of individual fin-rays within the dorsal and anal fins of bluegill, variation in (1) spine and ray lengths, (2) the proportion of the rays that were segmented or …
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Effects of liming on plankton and young-of-the-year bluegill growth in Flat Top Lake, West Virginia
… (phytoplankton, zooplankton, young-of-the-year bluegill) were compared between a limed and unlimed arm in a moderately fertile, circumneutral reservoir that was sensitive to acidification, but had not yet shown signs of damage. The east arm (25.5 ha) of Flat Top Lake was treated with 28.8 dry …
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