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Showing 1 to 20 of 40 for “"darters"”.
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Predator Recognition Learning in Rainbow Darters (Etheostoma Caeruleum)
I investigated whether rainbow darters (Etheostoma caeruleum) could learn to associate cues from an unfamiliar predator with a known fright stimulus (darter alarm cues) through the process of classical conditioning. Darters in the experimental group (n=32) were trained using their alarm cues paired …
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Speciation and the evolution of male breeding coloration in darters
… speciation is a topic of much debate and study. Darters, a species-rich clade of freshwater fishes that exhibit widespread sexual dichromatism, may represent a prime example of speciation by sexual selection. I investigated mechanisms of sexual selection and reproductive isolation in two closely …
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Experience With Chemical Cues Influences Subsequent Behavior of Rainbow Darters, Etheostoma Caeruleum
… sets of experiments to determine whether rainbow darters, Etheostoma caeruleum, alter their behavior following experience with predatory and conspecific stimuli. First, I tested whether darters could learn to associate the color of a predator model with danger. In one experiment, I used standard …
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The Effects of a Reservoir on Genetic Isolation in Two Species of Darters
… the reservoir is acting as a genetic barrier to darters. <i>M</i>-ratios differed between species, with Etheostoma caeruleum exhibiting consistently higher <i>M</i>--ratios than <i>Etheostoma kantuckeense</i>. The low <i>M</i>- seen in <i>E. kantuckeense</i> could be due to small sample sizes …
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The Ecological Niche of Darters (Pisces:Percidae) Across Multiple Scales in the Ohio River Basin
… or absence of that organism. The North American darters (Percidae: Etheostomatinae) are an ideal focal community in which to test ecological niche theory. Darters are speciose (~250 species), recently derived (< 55 million years), and many species occur in syntopic populations in distinctive …
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Response of Three Species of Darters of the Genus Etheostoma to Chemical Alarm Signals From Conspecifics and Congeners
Prior to this study, seven species of darters (Pisces: Percidae) have been identified as having a chemical alarm substance, but it is not known how widespread the chemical alarm substance is within the family Percidae. It has been hypothesized that percid alarm substance is contained in epidermal …
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Friends in Low Places: Responses of a Benthic Stream Fish to Intra-Guild Alarm Cues
… species that are in the same prey-guild. Rainbow Darters (Etheostoma caeruleum) are benthic fish that co-occur with native Ozark Minnows (Notropis nubilus), recently-introduced Western Mosquitofish (Gambusia affinis), and native Oklahoma Salamanders (Eurycea tyrnerensis), all of whom are …
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Behavioral and genomic patterns of evolution during speciation via reproductive and agonistic character displacement
… in a diverse clade of stream fishes called darters (Percidae: Etheostominae). I focused on two groups in the subgenus Oligocephalus: the orangethroat darters clade (Etheostoma: Ceasia) and the rainbow darter (Etheostoma caeruleum). I found behavioral evidence for male-driven RCD and ACD …
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A Comparative Ecological Study of Two Sister Species of Darters in Kentucky, <i>Etheostoma Kantuckeense</i> and <i>Etheostoma Lawrencei</i>
<i>Etheostoma kantuckeense</i> and <i>E. lawrencei </i>are former members of the wide ranging <i>E. spectabile</i> species complex. <i>Etheostoma kantuckeense</i> is endemic to the Barren River Basin in Southern Kentucky and Northern Tennessee, while <i>E. lawrencei</i> occurs in the Green River, …
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Phylogenetic Systematics of Snubnose Darters (Percidae, Etheostoma), With Discussion of Reproductive Behavior, Sexual Selection, and the Evolution of Male Breeding Color
Snubnose darters are a speciose group of fishes in the family Percidae (North American darters and Holarctic perches and walleye). In the past 20 years, many new species have been described and much work has been done on the behavior of these fishes. However, phylogenetic relationships both among …
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Host Specificity of Freshwater Mussels: a Critical Factor in Conservation
… tests confirmed that orangethroat and rainbow darters from the Gasconade River were suitable hosts for the Gasconade River ellipse mussel (38% and 43% transformation success, respectively). I then compared the suitability of orangethroat darters from the Gasconade and Spring River for mussels …
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Habitat and Imperilment of the Candy Darter <i>Etheostoma osburni</i> in the New River Drainage, USA
… and (3) do stream segments where Candy Darters persist have cooler temperatures and less fine-sediment than segments where the species is extirpated or historically went undetected? Chapter 2 revealed Candy Darters demonstrate ontogenetic habitat shifts, with age-0 individuals selecting …
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Captive propagation, reproductive biology, and early life history of Crystallaria cincotta (Diamond Darter), Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter)
… were conducting during 2008 on three species of darters of the subgenus Nothonotus: Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter). Water temperatures during Diamond Darter spawning ranged from 11.1--23.3°C. Females and males spawned with …
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Establishing Patterns in Vegetation Associations of the Fountain Darter Etheostoma fonticola in the San Marcos and Comal Rivers of Texas
… whereas other studies describe Fountain Darters found outside of vegetation. Purposes of this study were to quantify Fountain Darter occurrences and abundances among vegetated habitats using the concept of obligate and facultative habitat use. Wadeable and non-wadeable habitats among …
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Investigations of Phylogenetic Relationships of the Percidae (Actinopterygii: Perciformes) Using Comparative DNA Sequences
Darters are a diverse monophyletic lineage of the freshwater fish family Percidae. The majority of percid species (91%) are darters, which are endemic to North America. This investigation attempts to resolve phylogenetic relationships of percid fishes at three hierarchical levels. First, complete …
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Factors Influencing Darter Dispersal Patterns in the Upper Roanoke River Watershed, Virginia
… that influence the dispersal patterns of darters, I conducted a spatially intensive mark/recapture study of three darter species in the upper Roanoke River watershed. Logistic regression was used to relate observed inter-riffle movements to gradients in riffle and corridor attributes. …
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Habitat models for predicting the occurrence of blotchside logperch (Percina burtoni) and tangerine darters (P. aurantiaca) in the North Fork Holston River and Little River, Virginia
Basin-wide visual estimation techniques developed in the Pacific Northwest for small streams were modified to survey about 180 river kilometers (rkm) of the North Fork Holston River and about 16 rkm of lower Little River (Clinch River tributary) in southwestern Virginia during the summer of 1992 …
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A quantitative evaluation of environmental enrichment for stream fish at the Tennessee Aquarium
… stream tank. I quantified behaviors of tangerine darters and Tennessee dace in response to increasing temperature. If seasonal mimicking functions as environmental enrichment, I expected both species to exhibit behaviors consistent with those observed in wild populations. Tennessee dace became …
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Genetic and Life History Characteristics of Venustaconcha Ellipsiformis and Venustaconcha Pleasii (Bivalvia, Unionidae) in the Ozark Plateaus Region
… River mussels as V. ellipsiformis. Rainbow darters (Etheostoma caeruleum) were an important natural host for V. pleasii in the James River (White system), but not for V. ellipsiformis, which utilized orange throat darters (E. spectabile) in the Spring River. In laboratory tests, 31% of V. …
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