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MSc, Faculty of Science, University of the Witwatersrand, 1969

The modern principle of freedom of subjectivity sets a moral standard which radically departs from Aristotle’s doctrine of the mean: modern moral agents, exemplified by the rising middle class, are granted the right to develop extreme dispositions towards goods like honour and wealth. Given that Aristotle considers such goods divisible in the sense that when one person gets more another gets less―the basic definition of distributive injustice―it isn’t surprising that modern philosophers like Kant have trouble reconciling this right with duty to others. Failing to resolve this dilemma satisfactorily in ethical terms, Kant and others turn to aesthetics, but Kant, at least, takes no account there of moral agents’ interest in the actual existence of goods. In this respect, the alternative to the Kantian aesthetic response I document in my dissertation is more Stoic than modern. This response, the modern mediocre-artist narrative, features a mediocre artist who fails to achieve the new standard of distributive justice and a genius who ostensibly succeeds. Though other critics discuss the ethical dimension of mediocre-artist narratives, they don’t consider the possibility that the mediocre artist’s failure might be due to the ethical dilemma just described. They therefore tend to uphold uncritically the narratives’ negative judgments of mediocrity, ascribing the latter’s failure to egotism. By contrast, I examine the genius’ artistic efforts for evidence of a similar failure. Ultimately, I demonstrate that the genius does indeed fail, albeit less spectacularly, arguing on this basis that egotistical characterizations of mediocrity are unjust. But the mediocre aren’t the only victims: in “concealing” genius’ failure, mediocre-artist narratives ignore unmet claims on its fruits. Finally, I invoke Derrida’s notion of the “lesser violence” to outline a new genre that recognizes the unattainability of the modern standard of justice. I call this genre morally progressive, rejecting Jürgen Habermas’ view that freedom of subjectivity has hit a dead end, and that we must backtrack to a philosophical turning indicated but not taken by Hegel, namely, the path of intersubjective freedom.

Lesser prairie chicken (Tympanuchus pallidicinctus; LPC) numbers have declined considerably in Texas since the early 1900s. As with other prairie chicken species, reasons for declining ranges and numbers have been attributed primarily to degradation and fragmentation of habitats. Until my study, no telemetry-based research on LPC has been conducted in the Rolling Plains of the Texas Panhandle. I radio-tagged and monitored LPCs in 2001 (spring??winter) and 2002 (spring) at a stable population in a native rangeland landscape (Study Area I) and in a declining population in a fragmented rangeland and agricultural landscape (Study Area II). No significant (P < 0.05) differences in survival were detected for combined study areas between years, or between study areas within years. Ranges and movements, as independent criteria by season, sex, and age classes combined were similar (P > 0.05) for both study areas. Lesser prairie chickens predominately occupied native rangeland cover types (>85%) compared to non-native rangelands at both study areas. Total invertebrate dry mass for all orders differed between native rangeland and Conservation Reserve Program (CRP) sites at Study Area II. Over 32 times more dry mass of invertebrates was collected at the native rangeland site than were collected at the CRP site. Herbaceous cover differed significantly for grasses (P < 0.01), forbs (P < 0.01), and bare ground (P < 0.01), but not for litter (P = 0.43) or woody cover (P = 0.63) between study areas. The similar range sizes, movement distances, and cover use observed for both study areas may provide insight into minimum area requirements for LPCs within the Rolling Plains in the Texas Panhandle.

Populations of Lesser Sandhill Crane (Grus canadensis canadensis) have been increasing during the last decades in Eastern Siberia, an area historically known as breeding grounds of endangered Siberian Cranes (G. leucogeranus). Significant overlap in niche dimensions between the two species may occur and could lead to competition between them. Therefore, this study of comparative breeding ecology of common Lesser Sandhill Cranes and endangered Siberian Cranes was performed. From late May to early August 2000, I studied Lesser Sandhill and Siberian cranes within a 30,000-ha part of Kytalyk Resource Reserve in the Republic of Sakha (Yakutia), Russia. My main objective was to compare dispersion patterns and resource use of breeding Lesser Sandhill and Siberian cranes in areas of distribution overlap. Lesser Sandhill Cranes used moderate-wet (polygon) areas as their nest sites and main foraging areas, where terrestrial foods were scattered. In contrast, Siberian Cranes were nesting and foraging on low-basin wet areas, where aquatic foods were concentrated and dominant. Inter-nest distances were less for heterospecific cranes than for conspecific cranes, and more territorial behavior was projected toward conspecifics than toward heterospecifics. Lesser Sandhill Cranes were more mobile and used moderate-wet (polygon) areas more than Siberian Cranes; however, both species spent similar time foraging and being alert. The two crane species used different vegetation types for nesting and foraging, had different time-activity budgets, and used different resources in the Siberian tundra. While the population of Lesser Sandhill Cranes in the study area has the potential to increase, both species may simultaneously share the same geographic area due to differences in ecological requirements.

During the summer of 1950 a field party under the leadership of Dr. Bogdan Zaborski of McGill University carried out a geographical reconnaissance survey of selected areas in central Alberta for the Geographical Branch of the Department of Mines and Technical Surveys, Ottawa. [...]

The modern principle of freedom of subjectivity sets a moral standard which radically departs from Aristotle’s doctrine of the mean: modern moral agents, exemplified by the rising middle class, are granted the right to develop extreme dispositions towards goods like honour and wealth. Given that Aristotle considers such goods divisible in the sense that when one person gets more another gets less―the basic definition of distributive injustice―it isn’t surprising that modern philosophers like Kant have trouble reconciling this right with duty to others. Failing to resolve this dilemma satisfactorily in ethical terms, Kant and others turn to aesthetics, but Kant, at least, takes no account there of moral agents’ interest in the actual existence of goods. In this respect, the alternative to the Kantian aesthetic response I document in my dissertation is more Stoic than modern. This response, the modern mediocre-artist narrative, features a mediocre artist who fails to achieve the new standard of distributive justice and a genius who ostensibly succeeds. Though other critics discuss the ethical dimension of mediocre-artist narratives, they don’t consider the possibility that the mediocre artist’s failure might be due to the ethical dilemma just described. They therefore tend to uphold uncritically the narratives’ negative judgments of mediocrity, ascribing the latter’s failure to egotism. By contrast, I examine the genius’ artistic efforts for evidence of a similar failure. Ultimately, I demonstrate that the genius does indeed fail, albeit less spectacularly, arguing on this basis that egotistical characterizations of mediocrity are unjust. But the mediocre aren’t the only victims: in “concealing” genius’ failure, mediocre-artist narratives ignore unmet claims on its fruits. Finally, I invoke Derrida’s notion of the “lesser violence” to outline a new genre that recognizes the unattainability of the modern standard of justice. I call this genre morally progressive, rejecting Jürgen Habermas’ view that freedom of subjectivity has hit a dead end, and that we must backtrack to a philosophical turning indicated but not taken by Hegel, namely, the path of intersubjective freedom.

Doctor of Philosophy / Department of Physics / Thomas W. Phillips / The emergence of heritable high-level resistance to the fumigant gas phosphine in stored-product insects is of grave concern to many grain growing countries around the world. The research reported in this dissertation was designed to determine the presence of phosphine resistance in 34 field collected populations of Rhyzopertha dominica (F.) from the United States and Canada, the potential to control resistant R. dominica populations utilizing high dose and longer exposure time strategies, and to develop a rapid assay for phosphine resistance detection. Using a discriminatory dose assay called the FAO number 16 method, adult R. dominica were sampled and subjected to a phosphine dose of 20 ppm for a fumigation exposure period of 20 h to distinguish a susceptible R. dominica adult by death from a resistant beetle that survives the treatment. Results from the study showed that 32 out of the 34 geographic populations surveyed had beetles resistant to phosphine, and the frequency of resistance varied from 97% in a population from Parlier, California to 0% in beetles from both Carnduff, Saskatchewan and Starbuck, Manitoba. A 20-hour dose response assay was used to characterize the level of resistance by calculating the resistance ratio factors using beetles from a laboratory susceptible strain and those from five of the populations sampled. This resistance ratio (RR) was based on the ratio of LC50 (estimate for the concentration to kill 50% of a test group) in the sampled population to the LC50 for the susceptible strain. The highest RR for the five resistant populations was nearly 596-fold in beetles from Belle Glade, Florida, which represented the “strong” resistance phenotype, whereas the lowest RR in that group was 9-fold in Wamego, Kansas, representing the “weak” resistance phenotype. Manipulation of concentration and exposure periods can be utilized to manage strongly resistant R. dominica populations. The effect of several phosphine concentrations and fumigation exposure periods were assessed on progeny of mixed life stage colonies of the strongly resistant R. dominica. A 48 hours dose response assay was carried out on these two strongly resistant populations to re-characterize their levels of resistance. Results from this assay showed that a phosphine dose of 730-870 ppm could control all resistant adult R. dominica. Additionally, phosphine concentrations ranging from 400-800 ppm phosphine for 96 hours completely killed mixed life stage colonies of strongly resistant lesser grain borers from the two populations studied. Lastly, fumigations done beyond 4 days at phosphine concentrations between 450-700 ppm controlled all phosphine resistant populations of lesser grain identified from our previous work. Phosphine applied at high concentrations is known to elicit a knockdown effect that can vary between susceptible and resistance grain insects. Using 18 of the 34 R. dominica populations this study sought to determine among three knockdown time (KT) techniques which method had potential to be utilized in an effective rapid assay for phosphine resistance in R. dominica. Adult R. dominica were exposed to a high concentration of phosphine (3000 ppm) to assess the time to knockdown 50%, 100% of a group of ten insects and that of single insects from the 18 geographically distinct populations vis a vis the resistance frequencies using the FAO method. KT100 quick test was better than the KT50 and Ktsingle, because bioassays were able to clearly distinguish among susceptible, weak and strong resistant individuals. Time for KT100 from susceptible populations did not exceed 30 minutes, while resistant populations had KT100 times above 30 min, with strong-resistant populations times longer than 100 min.

Master of Science / Department of Biology / David A. Haukos / In the southern Great Plains, the lesser prairie-chicken (Tympanuchus pallidicinctus; hereafter LEPC), an obligate grassland species, has experienced significant population declines and range contractions with subsequent conservation concern. Management actions often use land cover types to make inference about habitat quality. Relatively little information is available related to grazed rangelands to guide conservation. The influences of land cover types and livestock grazing on LEPC habitat selection have not been researched extensively in western Kansas. I evaluated the influence of land cover types and grazing management on vegetation characteristics, habitat selection, and nest/adult survival of LEPC in western Kansas. Females were captured and radio-marked to monitor habitat use, nest success, and adult survival. Grazing and vegetation data were collected via producer correspondence and vegetation surveys, respectively. Vegetation composition and structure differed across land cover types, which can be used to make inferences about LEPC habitat quality. Habitat selection analyses corroborated the importance of breeding habitat in close proximity to leks (<3 km) and identified land cover types selected for nesting (Conservation Reserve Program, Limy Upland, Saline Subirrigated) and brooding (Conservation Reserve Program, Red Clay Prairie, Sands, Sandy Lowland). Conservation Reserve Program patches positioned near rangelands contributed to LEPC reproductive success in northwest Kansas. In grazed lands, LEPC selected habitat close to leks (<3 km) and large pastures (>400 ha), exhibiting low-moderate stocking densities (<0.4 AU/ha), and low-moderate levels of deferment during the grazing season (60-100 days). Nest site selection was negatively influenced by increasing distance from a lek and grazing pressure. Daily nest survival rates were negatively influenced by increasing grazing pressure and high levels of stocking density. Annual adult female survival was negatively influenced as forage utilization (% forage removed) increased. Heterogeneity (coefficient of variation and standard deviation) of visual obstruction was decreased at stocking densities > 0.26 AU/ha. Future conservation actions should consider the potential of land cover types to create adequate vegetation structure, and manage rangelands with low-moderate stocking densities and deferment and greater pasture areas. The relationship between habitat selection and proximity of lek sites (< 5 km) should be used to identify quality LEPC habitat.

The modern principle of freedom of subjectivity sets a moral standard which radically departs from Aristotle’s doctrine of the mean: modern moral agents, exemplified by the rising middle class, are granted the right to develop extreme dispositions towards goods like honour and wealth. Given that Aristotle considers such goods divisible in the sense that when one person gets more another gets less―the basic definition of distributive injustice―it isn’t surprising that modern philosophers like Kant have trouble reconciling this right with duty to others. Failing to resolve this dilemma satisfactorily in ethical terms, Kant and others turn to aesthetics, but Kant, at least, takes no account there of moral agents’ interest in the actual existence of goods. In this respect, the alternative to the Kantian aesthetic response I document in my dissertation is more Stoic than modern. This response, the modern mediocre-artist narrative, features a mediocre artist who fails to achieve the new standard of distributive justice and a genius who ostensibly succeeds. Though other critics discuss the ethical dimension of mediocre-artist narratives, they don’t consider the possibility that the mediocre artist’s failure might be due to the ethical dilemma just described. They therefore tend to uphold uncritically the narratives’ negative judgments of mediocrity, ascribing the latter’s failure to egotism. By contrast, I examine the genius’ artistic efforts for evidence of a similar failure. Ultimately, I demonstrate that the genius does indeed fail, albeit less spectacularly, arguing on this basis that egotistical characterizations of mediocrity are unjust. But the mediocre aren’t the only victims: in “concealing” genius’ failure, mediocre-artist narratives ignore unmet claims on its fruits. Finally, I invoke Derrida’s notion of the “lesser violence” to outline a new genre that recognizes the unattainability of the modern standard of justice. I call this genre morally progressive, rejecting Jürgen Habermas’ view that freedom of subjectivity has hit a dead end, and that we must backtrack to a philosophical turning indicated but not taken by Hegel, namely, the path of intersubjective freedom. / Arts, Faculty of / English, Department of / Graduate