Texte remanié de la Habilitationsschrift: Philosophische Fakultät--Bonn, 1972-73. / Bibliogr. p. 340-341. Index.

Thesis (M. Sc.)--Acadia University, 2000. / Includes bibliographical references. Also available on the Internet via the World Wide Web.

Diss. / Cover title. Vita. Filmed with: Rück, K. / De M. Tulli Ciceronis oratione De domo sua ad pontifices -- Rosenthal, W. / De Antiphontis in particularum usu proprietate -- Poschmann, B. / Hat Augustinus die Privatbusse eingeführt? -- Ritter, K. / De Pindari studio nomina variandi -- Schering, O. / Symbola ad Socratis et Socraticorum epistulas explicandas -- Schinck, A. / De interjectionum epiphonematumque vi et usu apud Aristophanem -- Schiller, H. / Beiträge zur Entstehungsgeschichte der Odyssee -- Scherrer, J. / Gallier und ihre Verfassung -- Remark, P. / De amphorarum inscriptionibus Latinis quaestiones selectae -- Schmid, E. / Megariker -- Retzlaff, O. / Vorschule zu Homer -- Proskauer, C. / auslautende -s auf den lateinischen Inschriften -- Rasch, F. / De productione brevium syllabarum in Homeri Iliade -- Raschke, R. / De Alberico mythologo -- Reudler, R.T.F. / Tirocinia critica in Dionysii Halicarnassensis antiquitates romanas -- Steinacher, J. / Syntax des Hesiodischen Infinitivs -- Steinmeyer, E. von / De glossis quibusdam Vergilianis -- Strobl, K. / Euripides und die Bedeutung seiner Aussprüche über göttliches und allgemein menschliches Wesen -- Struck, E. / De Terentio et Donato -- Ring, M. / Zur Tropik Pindar's -- Rohde, E. / Ueber Lucian's Schrift Loukios e onos -- Riehemann, J. / De litis instrumentis -- Richardson, G.M. / De dum particulae apud priscos scriptores Latinos -- Ruckdeschel, F. / Archaismen und Vulgarismen in der Sprache des Horaz. Bibliography (p. vii-x) and index.

Inaug.-Diss.--Halle. / Vita.

Inaug.-diss.--Leipzig. / Vita.

Thesis (M.Sc.)--Acadia University, 1999. / Includes bibliographical references (leaf110). Also available on the Internet via the World Wide Web.

The objective of this study was to determine the kinds and numbers of food organisms consumed by Corydalus cornutus, and to investigate its periodicity of feeding during the spring months in the Brazos River, Palo Pinto County, Texas. A total of 468 larvae were collected at two-week intervals from February 29 to May 14, 1971. Larvae were taken at opportunity during three periods of the day, 6am.-12pm., 12pm.-6pm., and 6pm.-12am. A total of 23 different food items was observed in the 121 stomachs containing food. An expedient method of dissection of the digestive tract is included.

Cuticular hydrocarbons (CHCs) are found on the outer cuticle of all terrestrial arthropods. Although their primary function is in desiccation prevention, these compounds have also been shown to play a variety of roles in insect chemical communication, from species and sex recognition to providing cues of dominance and attractiveness. However, despite growing evidence of their versatility as cues, our knowledge of how CHCs are used in mating interactions is limited to Drosophila and field crickets. In this thesis I investigate the roles CHCs play in interactions at each stage of the mating process in the broad-horned flour beetle Gnatocerus cornutus. I assess the relative importance of CHCs in influencing male reproductive success and examine the complex interplay between different episodes of selection and the mechanisms of sexual selection acting on males. I use a combination of behavioural assays, experimental manipulations and gas chromatography. First, I identify the role of CHCs as cues of sperm competition risk and intensity, demonstrating how the presence of male-derived CHCs on the cuticles of virgin females elicits males to adjust their pre- and post-copulatory investment (chapter 2), by providing information on the state of their competitive environment. I then go on to look at the stability of CHCs as cues of sperm competition over time, finding that they are highly sensitive to environmental degradation (chapter 3) and do not persist in the habitat substrate of this species. Next, I investigate how male CHCs determine fighting and mating success. By estimating and comparing the strength and form of sexual selection imposed by male-male competition and female mate choice, I show that male CHCs are subject to strong antagonistic sexual selection (chapter 4). By experimentally manipulating male CHC profile, I then attempt to verify the selection gradients estimated for female choice 3 (chapter 5). However, my experimental manipulation fails to verify the importance of male CHCs for female mate choice. Finally, I explore the role of same-sex sexual behaviour (SSB) in determining male reproductive success (chapter 6). I find evidence to suggest that SSB may in fact be a form of aggression in its own right, and demonstrate that SSB and fighting may provide equivalent means for males to overcome female choice and secure a mating advantage. My results indicate that CHCs play key roles as chemical cues throughout the mating process and significantly impact male reproductive success. My thesis reveals the intricate nature of the relationships between mechanisms of sexual selection, alongside highlighting the need to consider both the social and physical environment when investigating the importance of chemical cues. I discuss the implications of these results for the evolution of male CHCs and how my findings can be used to further our knowledge of this field.

Ecologically, spiders are both predators and prey. Therefore, they must balance being aggressive enough to forage successfully, but not so aggressive that they become overly exposed to predation. Some species of spiders actively forage during clearly defined periods of the day, leading to the hypothesis that they should be less aggressive (or more defensive) during periods when they are not foraging, predicting that antipredator behaviour should be more pronounced during inactive foraging times. We tested the antipredator 'huddle response' in a nocturnal foraging orb-weaver, Larinioides cornutus, and found that, as predicted, the spiders huddled longer in the day than at night. We then conducted tests to determine whether the cycling of the response was regulated by an internal clock (circadian), and we found that huddle duration continued to cycle under constant dark (with periodicity significantly less than 24. h) as well as under constant light (periodicity nonsignificantly longer than 24. h). This work adds a novel behaviour to the list of behaviours under circadian control and also to the surprisingly short list of studies demonstrating circadian rhythm in spiders.

No description available.