Environmental variation and the maintenance of polymorphism : the effect of ambient light spectrum on mating behaviour and sexual selection in guppies

The intensity of sexual selection is influenced by environmental conditions because these conditions influence signal propagation and the risks of the signal being exploited by predators and parasites. We explore the possibility that spatial or temporal heterogeneity in environmental signalling conditions (in this case light spectrum) may induce fluctuating sexual selection on male behaviour and ornamentation in guppies. We used shade cloth and filters to experimentally manipulate light spectrum, mimicking conditions found naturally: early morning/late afternoon light (SC treatment), midday forest shade (F89 filter treatment) and midday woodland shade (F55 filter treatment). Females were more responsive to male courtship and males were less likely to attempt sneak copulations under F55 light than the other two treatments. By contrast, male display rate was not influenced by treatment. Females tended to prefer the same males under SC and F55 light, but attractiveness in these treatments was unrelated to attractiveness under F89 light. There were similarities among treatments in the traits that females preferred: females preferred males with larger areas of orange in all three treatments. There were, however, also some differences, including preference for larger males under F89 light and for smaller males under the other treatments. Overall, the influence of ambient light spectrum on the relative importance of mate choice and male sneak copulation may have important implications for the mode and strength of sexual selection in different environments. The findings on attractiveness and preference functions, however, suggest that light spectrum only weakly affects the direction of sexual selection by female choice.

Studentship and oppositional behaviour within physical education teacher education : a case study ; and, Between the rings and under the gym mat : a narrative

This thesis represents a part of a program of study that is reaching a closure. The broadest brush that could be applied to my work is that it concerns Physical Education Teacher Education (PETE), that it focuses on aspects of professional socialisation, and that it involves various case studies utilising naturalistic inquiry. Whilst it would be impossible and naive to believe that the reading of these texts will produce the meanings that I encourage, or have internalised, nevertheless the order of reading is at least something that I can argue for. Read in the order I suggest throughout the thesis I am hopeful that my subjectivities, and the learning and understandings I have reached may become clear. The purpose of this two part thesis is an exploration of the interplay or dialectic that exists between PETE students, academic staff and the subject matter within PETE. I have had to come to understand the limitations and advantages of insider research as the work has been completed at my University in the School of Human Movement and Sports Science where I have worked for twenty years. This thesis examines the extent to which studentship and oppositional behaviour underlies the dialectic that exists between the students and the various discourses within the program. I have written the study in two very different formats, one, a collection of stories about PETE and the other, an interpretative case study conducted during 1993 and 1994. Within the case study, studentship and oppositional behaviour were viewed as a measure of the extent to which students react and push against the forces of socialisation within their PETE program that is seen to represent dominant discourses, The following broad research questions were considered to enable the above analysis. 1. What is the nature of studentship and oppositional behaviour in a high status subject within PETE compared to a subject that is seen by students to be of little relevance and of low status? 2. How are studentship and oppositional behaviour related to students subjective warrants? 3. How are the studentship and oppositional behaviours exhibited by students related to the pedagogy and discourses reflected in the knowledge, beliefs and practices within the two sites. The starting point for this research was a study conducted as a totally separate research task (Swan, 1992) that investigated the hierarchies of subject knowledge within a PETE site and investigated the influence of such hierarchies upon student intention. A great deal of meta analysis exists about the manner in which a technocratic rationality pervades PETE but very little case study material of what this means to students and academic staff within such institutions is available. The stories in Between The Rings And Under The Gym Mat, which is the second part of this thesis, represent ‘the data’ differently from the case study, but they speak their own truth. At times the nature of the story is indistinguishable from the reality of the case study. Wexler (1992) undertook an ethnographic study about identity formation in three very different high schools, and published the findings in a book entitled Becoming Somebody. His introductory words about the nature of the social story he tells, are significant to this study and story. Social history is recounted by creative intervention that can only be made from culturally accessible materials. Ethnography is neither an objective realist, nor subjective imaginist account. Rather, it is an historical artefact that is mediated by elaborated distancing of culturally embedded and internally contradictory (but seemingly independent and coherent) concepts that take on a life of their own as theory. So, this is not ‘news from nowhere,’ but a theoretically structured story where both the story and its structure are part of my times. (p.6) The case study before you is organised with an analysis of studentship and oppositional behaviour detailed in chapter one. The following chapter conceptualises studentship and oppositional behaviour in relation to particular themes of professional socialisation, resistance to oppression and youth culture. Chapter three locates the case study to the major paradigmatic debates about the value and nature of the subject matter content within PETE, Chapter four outlines the case site, the research process and the research dilemma’s confronted in this study. The remaining three chapters are the case record as I can best understand it. In Between the Rings and under the Gym Mat (part B) the story most directly concerned with studentship and oppositional behaviour, is called Tale of Two Classes’. It takes on a very different reality to the case study (part A) and much can be said about the reality of lived experience which can be portrayed in narrative form as opposed to a clinical case study. Many of the other stories pose similar images that are contradictory and never quite complete. I have written a separate methodological section for the narrative stories. It is my intention that the case study and the series of stories should be viewed as essentially complementary, but also a discrete representation of a part of PETE. As part of the Ed D program I have undertaken four discrete research tasks as the starting point for this research I have referred to the first one (Hierarchies of Subject knowledge within PETE). I also undertook an action research project about ‘Teaching Poorly by Choice.’ A further piece of research was a somewhat reflective effort to draw together what this has all meant to me from a subjective and reflexive perspective. Such efforts are often seen as being self indulgent, as subjectivity in the form of lived experience sits uneasily in academia. A final paper involved an evaluation of Between the Rings and Under the Gym Mat from a pedagogical perspective by PETE professionals around the world. And that's the way things turned out.

Brand affinity and consumer repurchase behaviour : an empirical analysis

This research established a construct termed brand affinity, comprising the measures of anticipation of usage, social attraction, commitment, loyalty, and trust. In the context of a highly uncertain, intermittently available service, it was found that brand affinity had greater influence over consumers' repurchase intentions than the typical antecedents of overall and attribute level satisfaction.

Harem size and oviposition behaviour in a polygynous bark beetle

1. Harem polygyny can have fitness benefits and costs on females. In bark beetles of the genus Ips the latter may include within-harem competition between larvae. However, earlier competition between females for male care and mating opportunities may also influence oviposition behaviour. There has been relatively little investigation into the relationship between harem size and initial egg output. The present study investigated this relationship in the bark beetle Ips grandicollis.
2. The measure of egg output used was the number of eggs in the gallery with the most eggs in each harem. Mean ( ± SE) harem size of 242 observed harems was 3.25 ± 0.10. A curvilinear relationship was found between egg output and harem size, with females in smaller harems (one to four females) laying more eggs with increased harem size. However, females in larger harems (five to seven females) laid fewer eggs as harem size increased. The optimal harem size (in terms of number of eggs laid) was close to four females.
3. We found no evidence from a behavioural assay that females could preferentially choose unmated males over mated males with harems of two females. Additionally, the distribution of harem sizes suggests that females distribute themselves among males randomly.
4. The results suggest that harem size has effects on female reproduction that extend beyond larval competition and influence patterns of oviposition. The mechanism that determines why egg laying is greatest at intermediate levels is unknown. There is no evidence that smaller harems belong to lower quality males, but females may adjust egglaying behaviour in large harems as a result of reduced male attendance or anticipated larval competition.

Self-service technology complaint channel choice : exploring consumers' motives

Purpose – This study aims to explore consumers' motives for their choice of complaint channel in the context of self-service technology (SST) failure. Traditional and evolving communication channels are considered.

Design/methodology/approach – Qualitative self-report data from consumers who had recently experienced dissatisfaction with SSTs were collected via an open-ended survey question. Three independent coders used a deductive and inductive iterative process to code the data.

Findings – The findings suggest that both consumer complaint behaviour (CCB) theory and media richness theory (MRT) help to explain consumers' motivation for channel choice. However, consumers' choice appears to be motivated to a greater degree by convenience rather than task-medium fit.

Research limitations/implications – This study was set solely in the SST context and explored consumers' hypothetical complaint channel choice, not actual channel use. Future research could examine the actual performance of complaint channels as perceived by consumers. Consumers' motivation to choose other emerging electronic complaint channels, such as complaint blogs and forums, could also be explored.

Practical implications – Understanding consumers' complaint channel choice is important for organisations to enable them to provide effective and efficient ways for consumers to complain. As complaint channels proliferate, it is difficult for organisations to know which channels to offer.

Originality/value – Choosing an appropriate channel for resolving a complaint is an important consumer decision, which the study of CCB needs to be broadened to include. The current study addresses this gap by, for the first time, integrating CCB theory and MRT. This is valuable because it is common for consumers not to voice their complaints to organisations. To facilitate voiced complaints, organisations need to determine which complaint channels will be most effective and efficient and in which situations.

Who chose this restaurant anyway? The effect of responsibility for choice, guarantees and failure stability on customer complaining

Customers often behave in the context of a group, with different behavior occurring in this context to that which transpires in an individual context. However, customer complaining behavior (CCB), including voice, negative word of mouth, in addition to that transmitted electronically, and exit, in a group setting has not been studied previously. A service failure during a group celebration at a restaurant and the pattern of CCB that ensues is examined. This is based on customers’ level of responsibility in restaurant selection on behalf of the group, the presence of an unconditional service guarantee, and the perceived stability of the failure. Findings suggest that customers are more inclined to exit when they have participated to a greater degree in choice and that the presence of an unconditional guarantee interacts with participation to influence negative word of mouth intentions. Perceived failure stability had the greatest influence on CCB.

Does the choice of neighbourhood supermarket access measure influence associations with individual-level fruit and vegetable consumption? A case study from Glasgow

Background
Previous studies have provided mixed evidence with regards to associations between food store access and dietary outcomes. This study examines the most commonly applied measures of locational access to assess whether associations between supermarket access and fruit and vegetable consumption are affected by the choice of access measure and scale.

Method
Supermarket location data from Glasgow, UK (n = 119), and fruit and vegetable intake data from the 'Health and Well-Being' Survey (n = 1041) were used to compare various measures of locational access. These exposure variables included proximity estimates (with different points-of-origin used to vary levels of aggregation) and density measures using three approaches (Euclidean and road network buffers and Kernel density estimation) at distances ranging from 0.4 km to 5 km. Further analysis was conducted to assess the impact of using smaller buffer sizes for individuals who did not own a car. Associations between these multiple access measures and fruit and vegetable consumption were estimated using linear regression models.

Results
Levels of spatial aggregation did not impact on the proximity estimates. Counts of supermarkets within Euclidean buffers were associated with fruit and vegetable consumption at 1 km, 2 km and 3 km, and for our road network buffers at 2 km, 3 km, and 4 km. Kernel density estimates provided the strongest associations and were significant at a distance of 2 km, 3 km, 4 km and 5 km. Presence of a supermarket within 0.4 km of road network distance from where people lived was positively associated with fruit consumption amongst those without a car (coef. 0.657; s.e. 0.247; p0.008).

Conclusions
The associations between locational access to supermarkets and individual-level dietary behaviour are sensitive to the method by which the food environment variable is captured. Care needs to be taken to ensure robust and conceptually appropriate measures of access are used and these should be grounded in a clear a priori reasoning.

Young adult voting decision-making: Studying the effect of usage from a consumer behaviour perspective

This study investigates the application of consumer behaviour theory to young Australian adults’ voting decision-making. Previous decision-making studies identified constructs of subjective knowledge, involvement, information seeking, satisfaction, confidence, and stability as key factors in voting decision-making. This research tests the relationship that these factors have with the consumer behaviour concept of usage. A new concept, commitment to vote, is also considered for Australia’s compulsory voting context. Data were gathered from a sample of 257 Australian citizens between the ages of 18 and 25. Exploratory factor analysis produced nine factors, and MANOVA and ANOVA were used to test the differences between three usage groups: voluntary users, involuntary users, and never trieds. The results illustrate that usage has a significant influence on information seeking, commitment to voting, satisfaction with voting choice, and stability in voting decision-making. Therefore, usage is a key element in voter decision-making and needs to be included in future studies.

Investigation of consumer satisfaction with cognitive-behaviour therapy and sertraline in the treatment of adolescent depression

Objective: A new instrument, the Adolescent Depression Treatment Satisfaction Questionnaire (ADTSQ) was devised to measure the consumer satisfaction of depressed adolescents and their parents. The objectives of the paper were to present the psychometric proper ties ofthe ADTSQ and to investigate the relative consumer satisfaction with cognitive-behavioural therapy (CBT), sertraline (SRT) and a combined treatment of CBT and SRT (COMBINED) for the treatment of adolescent depression. In addition, participants were asked to rank their most preferred treatment from the following approaches: medication, individual counselling, group program and family therapy.Method: Thirty-eight adolescents with a unipolar depressive disorder and 37 parents who participated in a randomized clinical trial of CBT versus SRT versus COMBINED completed the ADTSQ following the completion of acute treatment.Results: The ADTSQ was found to have high internal consistency and exploratory factor analysis detected three underlying factors. High levels of consumer satisfaction were reported by both adolescents and parents in all three treatments. Those treated with CBT treatments reported higher levels of skill acquisition than those treated with SRT. Of the four treatment approaches, most parents and adolescentsrated individual counsellingas their first preference.Conclusions: The ADTSQ is a useful measure of consumer satisfaction for depressed adolescents and their parents. CBT, SRT and COMBINED were shown to have high consumer satisfaction with CBT's higher skills training content reflected in the participants' reports. Individual counselling was perceived as the most favourable choice of treatment for adolescent depression. Although limitations associated with the measurement of consumer satisfaction and of the study are acknowledged, it is recommended that the inclusion of consumer satisfaction measures be considered in clinical trials that examine treatment efficacy.

Noisy neighbours at the frog pond: effects of invasive cane toads on the calling behaviour of native Australian frogs

Invasive species can disrupt the communication systems that native biota use for reproductive interactions. In tropical Australia, invasive cane toads (Rhinella marina) breed in many of the same waterbodies that are used by native frogs, and males of both the invader and the native taxa rely on vocal signals to attract mates. We conducted playback experiments to test the hypothesis that calls of toads may influence the calling behaviour of frogs (Limnodynastes convexiusculus and Litoria rothii). Male L. convexiusculus adjusted their calling rate and the variance in inter-call interval in response to a variety of sounds, including the calls of cane toads as well as those of other native frog species, and other anthropogenic noise, whereas L. rothii did not. Within the stimulus periods of playbacks, male L. convexiusculus called more intensely during long silent gaps than during calling blocks. Thus, males of one frog species reduced their calling rate, possibly to minimise energy expenditure during periods of acoustic interference generated by cane toads. In spite of such modifications, the number of overlapping calls (within stimulus periods) did not differ significantly from that expected by chance. In natural conditions, the calls of cane toads are continuous rather than episodic, leaving fewer gaps of silence that male frogs could exploit. Future work could usefully quantify the magnitude of temporal (e.g. diel and seasonal) and spatial overlap between calling by toads and by frogs and the impact of call-structure shifts on the ability of male frogs to attract receptive females.

Nature's choice? a study of the displacement of incumbents in elections

Como choques econômicos afetam eleições em democracias? Usando dados eleitorais do Congresso dos Estados Unidos, eu testo se choques adversos podem afetar desigualmente partidos incumbentes e oponentes. Esse efeito é identificado, entre vários procedimentos, por uma regressão em descontinuidade. Eu considero possibilidades teóricas para esse efeito, quando cidadãos não conseguem observar perfeitamente se a falta de bens públicos é devido a um choque adverso, ou a consumo privado do político. Quando o choque é observável, não há efeito; enquanto se não fosse, haveria. As evidências empíricas são consistentes com a teoria.

Stomach fullness modulates prey size choice in the frillfin goby, Bathygobius soporator

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Repeated unrewarded scent exposure influences the food choice of stingless bee foragers, Melipona scutellaris

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Consistency of side choice in the milking parlour by holstein-friesian cows and its relationship with their reactivity and milk yield

Dairy cows often have to choose which of two sides to enter in the milking parlour. Some cows are very consistent in this choicė, and it is common to assume that when these cows are more disturbed are being milked in their non-preferred side. Such disturbance might involve significantly poor welfare. In order to assess this assumption, we decided to study the behaviour and milk yield of dairy cows and their relationships with side preference in the milking parlour. The study was carried out at Cambridge University Farm, in a two-sided tandem milking parlour. The data collection followed the daily management routine. We recorded the side chosen by each cow (left or right) during 40 milking sessions. Data from 70 cows, which were present in at least 25 milking sessions (mode = 36), were included in the statistical analysis. Cows' reactivity (CR) during premilking udder preparation, time spent fitting the milking cluster (FT), milk yield (MY) and duration of milking (DM) were measured. There was evident individual variation in the consistency of side choice. Individual differences (ANOVA, P < 0.001) were also found in CR, FT, MY and DM; although these variables were not significantly affected by the side or the interaction animal × side (ANOVA, P < 0.05). The comparison between left and right side means (paired t-test) of these variables did not show significant differences (P < 0.05). We concluded that there is no evidence that the cows were discomforted or stressed when milked in the non-preferred side of the milking parlour. © 2001 Elsevier Science B.V.