Doctor of Philosophy

dissertationThis study explores the ways in which ethnographic data might be represented within a hypertext; format. It begins with an analysis of the historical roots of the technology to determine key characteristics that differentiate it from other media. Three characteristics surface through this analysis: multilinearity, multivocality, and multimodality. The current study examines these characteristics from a more critical stance to determine what is possible in practice. To this end, three ethnographic hypertext;s are analyzed to determine strengths and weaknesses. From this analysis, a set of design implications emerge that provides a framework for a case study entitled The Congo Prototype. The Congo Prototype is built from an extensive study of a museum located in Belgium, The Royal Museum for Central Africa (RMCA), along with interviews with colonial veterans who served in the Congo up until Independence. This work offers the reader specific techniques that might be incorporated into future works, and at the same time, provides a stand alone ethnographic study of numerous narratives revolving around the Belgian Congo. In the final sections of this dissertation, several suggestions are outlined for future research. It is suggested that practitioners might consider database driven ethnographies as a means of creating a more dynamic reading experience; cross linked studies to achieve a higher degree of multivocality; and integration of a "play around" feature that would allow readers to determine the amount of data that could be viewed in support of specific claims. The study concludes with a brief discussion of some of the intractable issues that cannot be solved through technological means, such as the crisis of representation, the importance of being in the field, and the politics of web publishing

A Longitudinal Study of Dietary Intake and Influence of Iron Status on Infants\u27 and Toddlers\u27 Mental and Motor Development

Thirty-two non-anemic children were assessed clinically, biochemically and anthropometrically at six months, one year and two years of age to investigate the relationship of iron status to mental and motor development. Using dietary history and dietary record instruments, dietary iron was estimated and compared to the National Food Consumption Survey (1985) and the Recommended Dietary Allowances (RDA) for corresponding age groups. The Bayley Scales of Infant Development (which assess mental and motor development) and the Caldwell Home Inventory (which evaluates the environmental stimuli) were performed and correlated with blood iron parameters, anthropometric measurements and dietary nutrient intakes. Nutrient intakes of these children were similar to those reported in the NFCS (1985) for one- and two-year-olds. Iron intake decreased from 13.2 mg iron daily (88% RDA) at six months to 10.3 mg iron daily (68% RDA) and 7.4 mg iron daily (49% RDA) at two years of age. The correlation between iron intake and development was not statistically significant at any age. Stepwise, multiple regression was employed to investigate the extent to which variation in mental and motor development was explained by dietary variables, blood iron parameters and anthropometric measurements. Hematocrit was the only variable that significantly explained variation in mental development at all three ages. The findings of this study were different from earlier studies in that there was no statistical correlation between iron status and mental development; but, it did confirm the conclusion of more recent experiments that iron status has little effect on infants\u27 and toddlers\u27 development. The finding that infants and toddlers consuming less than the RDA for iron do not display iron deficiency symptoms and were not developmentally delayed or compromised should be comforting to parents who are concerned about iron intake during this critical period of infants\u27 brain growth

Foraging ecology of ringed seals (Pusa hispida), beluga whales (Delphinapterus leucas) and narwhals (Monodon monoceros) in the Canadian High Arctic determined by stomach content and stable isotope analysis

Stomach content and stable isotope analysis (delta C-13 and delta N-15 from liver and muscle) were used to identify habitat and seasonal prey selection by ringed seals (Pusa hispida; n = 21), beluga whales (Delphinapterus leucas; n = 13) and narwhals (Monodon monoceros; n = 3) in the eastern Canadian Arctic. Arctic cod (Boreogadus saida) was the main prey item of all three species. Diet reconstruction from otoliths and stable isotope analysis revealed that while ringed seal size influenced prey selection patterns, it was variable. Prey-size selection and on-site observations found that ringed seals foraged on smaller, non-schooling cod whereas belugas and narwhals consumed larger individuals in schools. Further interspecific differences were demonstrated by delta C-13 and delta N-15 values and indicated that ringed seals consumed inshore Arctic cod compared to belugas and narwhals, which foraged to a greater extent offshore. This study investigated habitat variability and interseasonal variation in the diet of Arctic marine mammals at a local scale and adds to the sparse data sets available in the Arctic. Overall, these findings further demonstrate the critical importance of Arctic cod to Arctic food webs

Teachers and pupils under pressure: UK teachers’ views on the content and format of Personal, Social, Health and Economic education

Personal, Social, Health and Economic Education (PSHE) is undergoing changes within UK schools, and many topics, including healthy lifestyles, sex and relationships, and mental resilience/wellbeing will become statutory parts of the curriculum. The overall aim of this study was to describe teachers’ views about these topics and how they should be delivered. A cross sectional online survey was completed by 167 teachers (87.8% female). Questions were asked about what was currently covered in schools, and which topics were important, and appropriate. Rating scales were used to garner attitudes and open ended questions probed for more details from the participants. Peer pressure about drugs and alcohol was commonly discussed (72% of participants) however pleasurable effects of drugs were rated inappropriate by 38.1%. Sexting (75.4%), sexual consent (69.5%) were the most frequently discussed in the sex and relationship topics, while 26.5% said that sexually transmitted diseases were not appropriate to talk about in school. Resilience (94.3%), body image/appearance (91.9%) had high levels of coverage, while 41.8% said treatments for mental health conditions were not discussed but should be. For all topics, most teachers rated their access to training as insufficient. Confidence in talking about the topic of mental health and wellbeing was lower than for the other topics. Issues highlighted by these findings should be addressed when new curriculums are being planned. Teachers witness the challenges faced by their pupils on a daily basis and their experiences, alongside further engagement with pupils, should be used to meaningfully inform the new PSHE curriculum

Resisting temptation: alcohol specific self-efficacy mediates the impacts of compensatory health beliefs and behaviours on alcohol consumption

Awareness of health risks linked with excessive alcohol consumption appears to have little influence on how much some people drink. Compensatory health beliefs (CHBs), in which the consequences of unhealthy behaviour are considered to be neutralised by additional healthy behaviours, are one way of justifying poor health choices. Currently, the role of CHBs within the context of drinking behaviour is not well understood. This research examined associations between alcohol specific compensatory health beliefs (ACH-Beliefs) and behaviours (ACH-Behaviours), alcohol consumption and alcohol specific self-efficacy (ASE), via an online survey completed by 249 participants, aged 18 + years (63.1% female; M age = 41.62 years; SD = 14.80). Higher ACH-Beliefs were associated with increases in ACH-Behaviours. While both predicted alcohol consumption, a greater proportion of variance was explained by ACH-Behaviours. ASE was a significant mediator of those relationships, suggesting that those with higher ASE may be better equipped to regulate drinking behaviour. Recommendations for future research include measuring both CHBs and behaviours within an experimental design, and further investigation of related cognitions such as compensatory behaviour intentions. Alcohol misuse interventions may wish to consider the potential roles of CHBs and behaviours in facilitating maladaptive coping strategies, and how addressing these may reduce harms

Totalitarianism and geography: L.S. Berg and the defence of an academic discipline in the age of Stalin

In considering the complex relationship between science and politics, the article focuses upon the career of the eminent Russian scholar, Lev Semenovich Berg (1876–1950), one of the leading geographers of the Stalin period. Already before the Russian Revolution, Berg had developed a naturalistic notion of landscape geography which later appeared to contradict some aspects of Marxist–Leninist ideology. Based partly upon Berg's personal archive, the article discusses the effects of the 1917 revolution, the radical changes which Stalin's cultural revolution (from the late 1920s) brought upon Soviet science, and the attacks made upon Berg and his concept of landscape geography thereafter. The ways in which Berg managed to defend his notion of geography (sometimes in surprisingly bold ways) are considered. It is argued that geography's position under Stalin was different from that of certain other disciplines in that its ideological disputes may have been regarded as of little significance by the party leaders, certainly by comparison with its practical importance, thus providing a degree of ‘freedom’ for some geographers at least analogous to that which has been described by Weiner (1999. A little corner of freedom: Russian nature protection from Stalin to Gorbachev. Berkeley: University of California Press) for conservationists. It is concluded that Berg and others successfully upheld a concept of scientific integrity and limited autonomy even under Stalinism, and that, in an era of ‘Big Science’, no modernizing state could or can afford to emasculate these things entirely

Using games in geographical and planning-related teaching : serious games, edutainment, board games and role-play

This paper reviews the use of games in geographical teaching, including prior to the emergence of computer-based (digital) games. The growing popularity of ‘serious games’ and ‘edutainment’ is addressed, focusing on their perceived advantages in classroom-based teaching. The blurring between digital games for educational purposes and games primarily for entertainment is discussed, reflecting on the popularity of SimCity and the potential of these games for learning about urban planning. This analysis champions games enabling students to play different roles and produce realistic ‘real life’ outcomes. Two examples of non-digital board games, Participology and Geogopoly, illustrate how role play broadens students’ understanding of planning and human geography

Identification of predation events in wild fish using novel acoustic transmitters

Background: Acoustic telemetry is a commonly used tool to gain knowledge about aquatic animal ecology through the study of their movements. In telemetry studies researchers must make inferences regarding the movements and the fates of tagged animals. Until recently, predation has been inferred in telemetry data using a variety of methods including abrupt changes in movement patterns or habitat use. An acoustic telemetry transmitter has been developed to detect predation events of tagged animals, and while they have performed well in controlled laboratory trials, literature regarding the application of these novel transmitters in field settings is limited. The objective of this research was to describe the detection data obtained from field studies using predation tags and propose methods to incorporate this information in decision-making about the fate of tagged animals. We implanted 60 yellow perch (Perca flavescens) with predation transmitters and evaluated their spatial use in a receiver array (34 ha) using a combination of centres of activity, roaming indices, and step length measures to examine detection data. Results: Over 5 months, 19 apparent predation events were identified by the transmitters. Roaming indices and centres of activity revealed a variety of detection patterns, including instances of altered behaviour before and after predation that matched tag-indentified predation events, dropped tags post-predation, and detections that ceased post-predation indicating the predator might have left the array. Based on the observed patterns, probable predation was inferred for 15 of 19 triggered tags, with unclear fates for four fish. Conclusions: Our study provided a framework to assess the fate of animals tagged with predation transmitters and demonstrate how these tags can contribute to telemetry studies. We showed how detections can be categorized using tag status to compare movement metrics among individuals, provided tools to explore space use surrounding predation events, and synthesized this information to inform uncertainty surrounding tag-identified predation events. Predation tags do not remove all uncertainty about the fate of tagged individuals, but combined with other metrics they increase the likelihood of identifying abnormal movements that could otherwise introduce biased detection histories into studies of small-sized fishes

The influence of dynamic environmental interactions on detection efficiency of acoustic transmitters in a large, deep, freshwater lake

Background: Acoustic telemetry is an increasingly common method used to address ecological questions about the movement, behaviour, and survival of freshwater and marine organisms. The variable performance of acoustic telemetry equipment and ability of receivers to detect signals from transmitters have been well studied in marine and coral reef environments to inform study design and improve data interpretation. Despite the growing use of acoustic telemetry in large, deep, freshwater systems, detection efficiency and range, particularly in relation to environmental variation, are poorly understood. We used an array of 90 69-kHz acoustic receivers and 8 sentinel range transmitters of varying power output deployed at different depths and locations approximately 100-9500 m apart for 215 days to evaluate how the detection efficiency of acoustic receivers varied spatially and temporally in relation to environmental conditions. Results: The maximum distance that tags were detected ranged from 5.9 to 9.3 km. Shallow tags consistently had lower detection efficiency than deep tags of the same power output and detection efficiency declined through the winter months (December-February) of the study. In addition to the distance between tag and receiver, thermocline strength, surface water velocity, ice thickness, water temperature, depth range between tag and receiver, and number of fish detections contributed to explaining variation in detection efficiency throughout the study period. Furthermore, the most significant models incorporated interactions between several environmental variables and tag-receiver distance, demonstrating the complex temporal and spatial relationships that exist in heterogeneous environments. Conclusions: Relying on individual environmental variables in isolation to interpret receiver performance, and thus animal behaviour, may be erroneous when detection efficiency varies across distances, depths, or tag types. As acoustic telemetry becomes more widely used to study ecology and inform management, it is crucial to understand its limitations in heterogeneous environments, such as freshwater lakes, to improve the quality and interpretation of data. We recommend that in situ range testing and retrospective analysis of detection efficiency be incorporated into study design for telemetry projects. Furthermore, we caution against oversimplifying the dynamic relationship between detection efficiency and environmental conditions for the sake of producing a correction that can be applied directly to detection data of tagged animals when the intended correction may not be justified

Ocean warming has greater and more consistent negative effects than ocean acidification on the growth and health of subtropical macroalgae

Macroalgae are the major habitat-forming organisms in many coastal temperate and subtropical marine systems. Although climate change has been identified as a major threat to the persistence of macroalgal beds, the combined effects of ocean warming and ocean acidification on algal performance are poorly understood. Here we investigate the effects of increased temperature and acidification on the growth, calcification and nutritional content of 6 common subtropical macroalgae; Sargassum linearifolium, Ulva sp., Amphiroa anceps, Corallina officinalis, Delisea pulchra and Laurencia decussata. Algae were reared in a factorial cross of 3 temperatures (23°C [ambient], 26°C and 28°C) and 3 pH levels (8.1 [ambient], 7.8 and 7.6) for 2 wk. The highest (28°C) temperature decreased the growth of all 6 macroalgal species, irrespective of the pH levels. In contrast, the effect of decreased pH on growth was variable. The growth of Ulva sp. and C. officinalis increased, L. decussata decreased, while the remaining 3 species were unaffected. Interestingly, the differential responses of macroalgae to ocean acidification were unrelated to whether or not a species was a calcifying alga, or their carbon-uptake mechanism—2 processes that are predicted to be sensitive to decreased pH. The growth of the calcifying algae (C. officinalis and A. anceps) was not affected by reduced pH but calcification of these 2 algae was reduced when exposed to a combination of reduced pH and elevated temperature. The 3 species capable of uptake of bicarbonate, S. linearifolium, L. decussata and Ulva sp., displayed positive, negative and neutral changes in growth, respectively, in response to reduced pH. The C:N ratio for 5 of the 6 species was unaffected by either pH or temperature. The consistent and predictable negative effects of temperature on the growth and calcification of subtropical macroalgae suggests that this stressor poses a greater threat to the persistence of subtropical macroalgal populations than ocean acidification under ongoing and future climate change