The effect of social condition and diet on the frequency of male-male agonistic displays in the field cricket, gryllus bimaculatus /

The frequency and type of agonistic displays involved in male-male encounters should be significantly influenced by the presence of females. Discrete agonistic displays vary in energy expenditure and risk, and therefore should be dependent on available resources. The influence of live females and the scent of females, on the frequency of male agonistic displays was observed in a laboratory terrarium using the field cricket Gryllus bimaculatus. The effect of energy constraints on display frequency was also determined. Half the males were fed a diet high in protein and fet; the other males were fed a lower quality diet, for a 7-11 day period. The frequency of five individual displays and mating frequency were recorded using an Event Recorder and notebook. Each group of males was presented with three experimental conditions, over three days, involving the presence or absence of live females and female scent. The presence of females elicited an increase in all displays except antennation; female scent increased the frequency of antennations, mandible flares and grapples, but to a lesser extent than did live females. The frequency of grapples significantly increased for males fed the high quality diet; however diet did not influence the other displays. The combined influence of diet and condition was significant for mandible flare only. Mating frequency was not influenced by diet. However, the frequency ofthe displays were positively correlated with mating frequency for high quality fed males. Escalated displays involving high costs, such as grapple and mandible flare, increased in frequency when the benefits of winning contests were high in G.bimaculatus. Escalation to grapple behaviour was less evident for males fed the lower quality diet as this imposed energy constraints on high cost displays.

The condition of Niagara Falls, and the measures needed to preserve them : eight letters published in the New York Evening post, the New York tribune, and the Boston daily advertiser, during the summer of 1882 /

Appendix: Extracts from Harper's weekly, New York herald, New York tribune and the Nation.

Report of the Committee appointed to inquire into the Present condition and distribution of the flags, standards and colors, which have been taken by the forces of the United States from their enemies, and whether it would be expedient to make any provision in relation to them.--

Adam Seybet, Chairman.

Corporal punishment : understanding the debate in Canada

There has been considerable debate over whether corporal punishment against children should be prohibited in Canada. Various organizations, most notably the Canadian Foundation for Children, Youth and the Law, have argued that the Canadian Government should ban the use of corporal punishment by repealing the specific section of the Canadian Criminal Code that provides parents with a legal defence to use corporal punishment against their children; this provision is outlined in Section 43 of the Criminal Code. Recently, the Canadian Foundation for Children, Youth and the Law challenged the constitutionality of Section 43 before the Supreme Court of Canada. The organization claimed Section 43 is unconstitutional. It violates children's Charter rights, such as the right to security of a person (Section 7), the right to be protected from cruel and unusual treatment (Section 12), and denies children the same protection adults receive under the law. Both the Canadian government and the Supreme Court of Canada reject the Foundation's arguments. Examining the federal government and the judicial system's rationale for refusing to remove Section 43 of the Canadian Criminal Code discloses how the parent-child relationship is perceived. This thesis examines how the parent-child relationship is perceived by the Canadian government and the issues that arise from such a view. This examination is essential for the comprehension of why Canada's corporal punishment law was enacted and remains in effect today.

Report on the Condition of the Niagara Railway Suspension Bridge (1860)

Final report of John A. Roebling, Civil Engineer, to the presidents and directors of the Niagara Falls Suspension and Niagara Falls International Bridge Companies, on the condition of the Niagara Railway Suspension Bridge.