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 97 for “"minnow"”.
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Minnow Movements Due to Stream Pollution
46 leaves
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Life History of the Ozark Minnow, Dionda Nubila
… and associated species of the Ozark minnow, Dionda nubila (Forbes), were studied. Monthly samples from the James River in Greene County, Missouri, were taken from July 22, 1976 through September 23, 1977, and weekly samples were taken from April 5 through May 31, 1977. Adults were …
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In vitro model of the fathead minnow hypothalamic-pituitary-gonadal axis for toxicological evaluation
… to develop a tissue co-culture of the fathead minnow (Pimphales promelas) HPG axis and liver to serve as an in vitro system that reproduces the interaction of the fathead minnow HPG axis in vivo. This model system was tested by evaluating the effects of a known EDC, trenbolone acetate (TRB), …
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Investigation into three potential modifying factors in larval fathead minnow (Pimephales promelas) growth and survival
… 44 mg MB/L in 24 h. At the suggested fathead minnow culture temperature, 25°C, concentrations greater than 5.0 ppm were acutely toxic in 96 h. Chronic toxicity, determined at 25°C, was found at levels greater than 2.12 mg MB/L. Light intensity negatively affected MB chronic toxicity. Chronic …
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The fathead minnow embryo as a model for the development of alternative testing methods in ecotoxicology.
The fathead minnow, Pimephales promelas, a small cyprinid from North America, is widely used as laboratory test fish. In the present study, rearing and breeding conditions for the fat-head minnow were optimized in our laboratory to produce eggs on a regular basis for testing. Firstly, these eggs …
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The toxic effects of the pesticide lindane on the early developmental stages of the fathead minnow
… the eggs, yolksac fry and larvae of the fathead minnow (Pimephales promelas) were investigated over 14 days at 25 and 18°C. The general objective was to understand the effects of the pesticide on the early life stages of the fish, and to evaluate the suitability of these stages as indicators of …
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Campostoma anomalum Roanokense, a new subspecies of the stoneroller minnow in the James and Roanoke rivers
Campostoma anomalum roanokense, a new subspecies of C. anomalum in the James and Roanoke Rivers of Virginia, West Virginia, and North Carolina is compared to C. a. kanawhanum, the most closely related form, and to other similar forms. Three races of C. a. roanokense: a. South Fork Roanoke River …
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Development of methodology for community level toxicity testing using the fathead minnow seven day survival-growth impairment test
… of the food source currently used in the fathead minnow survival-growth impairment test (<i>Artemia</i>) with a freshwater food source (the rotiter, <i>Brachionus calyciflorus</i>). Along with the alga <i>Chlorella vulgaris</i> (producer), B. calyciflorus (primary consumer) and the fathead minnow …
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Metapopulation theory explains Black-stripe Minnow (Pisces: Galaxiidae, Galaxiella nigrostriata) distribution in seasonal wetlands in south-west Western Australia
The objective of this project was to determine if Galaxiella nigrostriata populations could belong to a metapopulation. Metapopulation theory describes how multiple populations with occasional connectivity are a ‘population of populations’. Some populations’ habitats have optimal conditions (source …
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The toxicity of ammonia to the marine organisms, sheepshead minnow (Cyprinodon variegatus), mysid (Mysidopsis bahia), and grass shrimp (Palaemonetes pugio)
… conducted with one marine fish, the sheepshead minnow (Cyprinodon variegatus), and two marine invertebrates, the mysid (Mysidopsis bahia), and grass shrimp (Palaemonetes pugio). The acute LC 50 and the no-observed-effect-concentration (NOEC) were determined for each organism and compared to data …
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Food Habits and Consumption Estimates of Walleyes Stocked as a Tool to Suppress Fathead Minnow Populations in West-Central Minnesota Wetlands
… However, persistent, highly abundant fathead minnow Pimephales promelas populations often prevent this clear-water state from occurring. The presence of fathead minnows has detrimental effects on macroinvertebrates, zooplankton, water clarity, and thus macrophytes and epiphyton. Therefore, the …
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Assessing the Live Bait Industry and the Ecological Status of Invasive Cyprinodontiformes (Sheepshead minnow: Cyprinodon variegatus and Gulf killifish: Fundulus grandis) in Texas Streams
… and ecological impacts of the sheepshead minnow (<em>C. variegatus</em>) and the gulf killifish (<em>F. grandis</em>). Both species were thought to have been introduced into inland Texas waters via bait-bucket releases and have caused native populations of their inland congeners to …
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Predatory and Mutualistic Interactions between Freshwater Minnows and their Predators
… ecosystems is the pebble nest-building minnow, the bluehead chub (Nocomis leptocephalus; "chub"). Chubs provide spawning habitat for not only themselves, but for other minnows, collectively called "nest associates". In this work, I observe the predatory and potential mutualistic …
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A Survey of the Fishes and Habitat of the Cheyenne River in South Dakota
… flathead chub Platygobio gracilis (28%), plains minnow Hybognathus placitus (24%), western silvery minnow H. argyritis (20%), sand shiner Notropis stramineus (7%), and channel catfish Jctaluros punctatus (6%). Among the species captured were five previously considered rare in South Dakota …
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Fish and Amphibian Occurrence in Waterfowl Production Area Wetlands in Minnesota During 1992
… fish and amphibians using barrel and clover leaf minnow traps. Trap nets were used in select wetlands to sample for larger fish species. Models were developed using stepwise logistic regress ion analysis to evaluate factors influencing fish and frog distribution. The dependent variable was the …
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Zooplankton, Macroinvertebrate, Herpetile, and Ichthyofaunal Biodiversity of Riverine Habitat on the Upper Missouri River
… was sampled using both active, small-mesh minnow seines, and passive, cloverleaf minnow traps, gear.</p>
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