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.
Results
Showing 1 to 16 of 16 for “"Nocomis"”.
-
Two Layers of Selfish-Herds in Spawning Aggregations of Chub (Nocomis Sp.) and its Nest Associates
… spawning aggregations hosted by bluehead chub (Nocomis leptocephalus). I hypothesized that the host benefits more directly from the aggregation it supports than previous research suggests – specifically, by using nest associates to decrease its own risk of predation (creating a selfish-herd) and …
-
Effects of Temperature and Dissolved Oxygen on Development and Survival of Embryos in Nests of Bluehead Chub Nocomis leptocephalus
… The communal nesting system of the Bluehead Chub Nocomis leptocephalus and its nest associates provides an ecologically realistic setting in which these stressors may interact, as many species deposit eggs within gravel mounds where oxygen levels fluctuate and embryos develop in close proximity. …
-
Cheating and Selfishness in Reproductive Interactions among Nest Associative Cyprinids
… mutualism is the nest association between Nocomis and other cyprinids. I assessed the role of host parental care while testing for the selfish-herd effect. Additionally, I examined multiple nest associates in order to elucidate potential cheaters. I utilized gonadosomatic index (GSI) to …
-
Investigating Reproductive Phenology and Alloparental Care in Leuciscid Fishes using Niche Theory Approaches
… community of Toms Creek in which Bluehead Chub Nocomis leptocephalus is the primary nest builder and nest associate species include Rosyside Dace Clinostomus funduloides, Rosefin Shiner Lythrurus ardens, Mountain Redbelly Dace Chrosomus oreas, Crescent Shiner Luxilus cerasinus, White Shiner …
-
Predatory and Mutualistic Interactions between Freshwater Minnows and their Predators
… 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 interactions between chubs, nest …
-
Hydraulic Characterization of Mounded Gravel Fish Nests: Incipient Motion Criteria and Despiking Acoustic Doppler Velocimeter Data
The bluehead chub (Nocomis leptocephalus) is a keystone species, an ecosystem engi- neer that constructs mounded gravel nests for spawning. Chubs provide benefits for other spawning fishes, predators, and benthic organisms through their nest construction. This study seeks to apply sediment …
-
Longitudinal Patterns of Community Structure for Stream Fishes in a Virginia Tailwater
… criteria for Etheostoma flabellare and Nocomis leptocephalus, two of the most common species in the Smith River. E. flabellare preferentially selected small and large cobble size rocks for their spawning rock. N. leptocephalus selected areas with slower demersal and mean water column …
-
Habitat use by fishes of the New River, West Virginia
… preferences of the endemic bigmouth chub, Nocomis platyrhynchus, were described. Bigmouth chubs used areas with plenty of small to large gravel (3-64 mm diameter), shallow depths, and moderate velocities for constructing spawning mounds. Bigmouth chubs were seen only using riffie and …
-
Differential stability of spawning microhabitats of warmwater stream fishes
… velocity. The mound-building bluehead chub (Nocomis leptocephalus) was distinct in its selection of substrate in the small gravel range, low water velocity and non-turbulent flow. Egg-buriers were the least distinct of the four guilds, exhibiting much variation in habitat use among the …
-
Life history of the endangered fine-rayed pigtoe pearly mussel, Fusconaia cuneolus (Lea, 1840), in the Clinch River, Virginia
… minnow (Pimephales promelas), river chub (Nocomis micropogon), stoneroller (Campostoma anomalum), telescope shiner (Notropis telescopus), Tennessee shiner (Notropis leuciodus), white shiner (Notropis a/beo/us), whitetail shiner (Notropis galacturus), and mottled sculpin (Cottus bairdi). …
-
Temporal trends in stream-fish distributions, and species traits as invasiveness drivers in New River (USA) tributaries
… Two natives, the mound-spawning bluehead chub Nocomis leptocephalus and its strong nest associate (reproductive mutualist), mountain redbelly dace Chrosomus oreas, were among the most rapid spreaders. Four natives showed evidence of decline. Our framework leverages historical presence data to …
-
Distribution and life history of the endangered James Spinymussel, pieurobema collina (bivalvia: unionidae)
… dace (Clinostomus funduloides), bluehead chub (Nocomis leptocephalus), pumpkinseed (Lepomis gibbosus), and fantail darter (Etheostoma flabellare) in the South Fork Potts Creek. Eleven fish families were tested for suitability as fish hosts in the laboratory, but only the following 7 species …
-
Developing Habitat Suitability Criteria for Individual Species and Habitat Guilds in the Shenandoah River Basin
… sp. (spotfin and satinfin shiners), river chub (Nocomis micropogon), adult and juvenile redbreast sunfish (Lepomis auritus), and adult smallmouth bass did not transfer. Only the pool-cover guild criteria transferred for both suitable and optimal habitat, while riffle guild, fast generalist guild, …
-
The comparative osteology and taxonomy of the North American cyprinid genera, Richard-sonius, Clinostomus and Semotilus, with notes on other minnows
… related genera, <i>Gila, Ptychocheilus, Nocomis, Campostoma, Exoglossum, Pimephales, Rhinichthyes</i> and <i>Notropis</i>. Several suckers were also examined. Some controversial aspects of the minnow skeleton have been clarified. The preethmoid is a double ossification which includes …
-
Applying ecological models to positive interactions among lotic fishes: implications for population and community regulation at multiple spatial scales
… experiment to manipulate presence of mutualists (Nocomis leptocephalus, host; Chrosomus oreas, associate), egg predators (biotic context) and habitat quality (abiotic context). I conducted behavioral nest observations and conducted repeated stream fish stream fish community surveys to collect …
-
Movement of fishes in a network of streams and implications for persistence
Mark-recapture studies sample unevenly over distance and generate biased or distance-weighted movement data, where short distances are sampled more frequently than long distances. I examined how study design affects the degree of distance-weighted sampling and observed movement distributions of …