Thesis (Ph.D.)--University of Melbourne, Dept. of Zoology, 2004. / Typescript (photocopy). Includes bibliographical references.

The American Robin (Turdus migratorius) in southwestern British Columbia was studied in regard to timing of reproduction, breeding biology, gonadal changes with time, and the relationship between photoperiod and gonadal condition. The basic breeding biology is similar to that found for other robins in the eastern and midwestern United States. The only marked difference is the very high nesting success rate of the robins which I studied. The overall success rate was 86.6 percent with 87.8 percent of all eggs laid hatching and 98.6 percent of these fledging. The onset of the breeding season was marked by the increase in territorial aggressive behaviour of male robins. This increase is a gradual process taking place over a two month period from early February until late March. The histological pattern of testes development and regression in the robin is the same as that for other temperate zone passerines. The length of the daily photoperiod has a definate effect on the timing of testicular recrudescence. The average testes weights of robins kept on eight, 12, and 16 hour photoperiods for the period of the annual cycle when testicular development occurs in the wild were 9.4 mg., 14.6 mg., and 200.5 mg. respectively. As well as stimulating gonadal development increasing photoperiod, as opposed to short day lengths, affects migratory behaviour as evidenced by Zugunruhe or night restlessness. / Science, Faculty of / Zoology, Department of / Graduate

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Thesis (M.S.)--Ohio State University. / Bibliography: leaves 98-104. Available online via OhioLINK's ETD Center

Thesis (Ph. D.)--University of Illinois at Chicago Circle. / Vita. Includes bibliographical references (p. 304-327).

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1. Cost constraints in models of territory size are based on time/activity/laboratory estimates that predict birds using larger territories will incur higher energy costs. The predicted form of the cost constraint may be linear, accelerating or decelerating depending on assumptions inherent in the models. The aim of this study was to assess the reality and form of the cost constraint by making direct measurements of the energy costs of territory use in birds that occupy territories of different size and shape; polygonal territories represented by the robin Erithacus rubecula, and linear by the dipper Cinclus cinclus. Free-living energy expenditure was measured using the doubly-labelled water technique, whilst simultaneously recording patterns of territory use by radio-tracking. 2. Territorial robins concentrated their activity in one or more foraging patches located in bushes. Range polygons containing all the foraging patches used by an individual provided estimates of territory area, and were generally of high eccentricity. A small proportion of robins was classified as non-territorial based on range polygon areas. Furthermore, while territorial robins showed high fidelity to ranges over the short term (days), non-territorial individuals were nomadic. Over the longer term (months), however, some territorial robins showed range drift. Dippers similarly used preferred core regions within ranges, although there was no selection for particular habitat features. 3. Because robins occupied territory polygons which varied from polygonal to highly linear, work was focused on this species to allow intra-specific comparison. Robins tended to commute between foraging patches by flying. It was appropriate, therefore, to describe territories in terms of a number of patches linked by a network of flight paths. This generated two further measures of territory size; the number of patches used and the total flight distance between patches. 4. The robins exploited a renewing food supply. Predictions were tested concerning the temporal scheduling of visits to foraging patches within territories. Patches tended to be separated by flight paths of similar lengths, and were visited in a regular sequence. Although the number of foraging patches used varied, all territories had similar total core areas. Robins using many small foraging patches commuted between patches more often and covered a larger total flight distance during each foraging circuit of the territory. The configurations of foraging patches were used in a highly linear manner. This was true even if the territory containing them was of low eccentricity. 5. Changes in structure and pattern of use varied predictably with territory size, and could be described mathematically. Based on this and published time/activity budgets, a suite of models was developed to predict how energy costs would vary with number of patches used and total flight distance between patches. Models were tested by directly measuring the energy expenditure of robins using different territories. The number of patches used and total flight distance between patches were both significantly correlated with energy expenditure, while territory area was not. One of the models showed a significant fit to the observed data, and suggested that the form of the energy cost constraint on territory size was linear. The effect of territory shape on energy costs was minimal. The implications of these results for models of territory size are discussed. 6. The slope and elevation of the energy cost constraint varied with the morphology of territory occupants. Based on this, an association of morphology with territory size was predicted; robins of lower mass and wing-loading using larger territories. The observed data supported these predictions, and suggested a possible genetic predisposition to particular patterns of territory occupancy in the robin.

Victorian women used strategies that allowed them to not only work as actresses but also as directors, producers, translators, and playwrights, thus transforming theatre at the cusp of the New Drama. Female friendships were particularly integral to these strategies as women employed secretiveness and anonymity, charm and shrewdness, networking and collaborating in small and large groups to meet their creative and professional goals. Through these means of sociability women enlarged their spheres of influence beyond the stage. Elizabeth Robins is a superb example of these strategies, particularly when theatrical realism was her primary focus. Though she also collaborated well with men, William Archer and Henry James among them, it was Robins’s female friends who helped her to establish a London career. This project shows how Robins and her women friends contributed to the New Drama in dynamic, critical, and often-secret ways. Marion Lea and Robins finagled the rights to Hedda Gabler in 1891. Lea and Florence Bell helped Robins to translate plays for production and to develop new acting techniques suited to realism. After Lea left England, Robins and Bell joined Grein’s Independent Theatre Society to present their anonymously written protest play Alan’s Wife. These efforts illustrate the adaptive functions of female friendships. Through closer examination of their relationships, particularly the one Robins and Bell called a sisterhood, we see the nurturing functions of female friendships. This project explains some of the reasons why, despite being famous in their day, these women disappeared from history. It was not just because of male control of the theatre, but was also a product of their own desires to protect themselves. Secrecy had served them well in the 1890s, but their fame faded as even friends forgot them. Yet, since female socialization taught them to be group-focused, these women’s stories are highly pertinent to the history of the theatre, an art form that is collaborative by its nature. Through study of their work and their relationships, we can fill some gaps in theatre history, women’s history, and nineteenth-century history, adding resonance to their voices that may carry to coming generations.

There is no abstract available for this dissertation.