Common endocrine and genetic mechanisms of behavioral development in male and worker honey bees and the evolution of division of labor.

Temporal polyethism is a highly derived form of behavioral development displayed by social insects. Hormonal and genetic mechanisms regulating temporal polyethism in worker honey bees have been identified, but the evolution of these mechanisms is not well understood. We performed three experiments with male honey bees (drones) to investigate how mechanisms regulating temporal polyethism may have evolved because, relative to workers, drones display an intriguing combination of similarities and differences in behavioral development. We report that behavioral development in drones is regulated by mechanisms common to workers. In experiment 1, drones treated with the juvenile hormone (JH) analog methoprene started flying at significantly younger ages than did control drones, as is the case for workers. In experiment 2, there was an age-related increase in JH associated with the onset of drone flight, as in workers. In experiment 3, drones derived from workers with fast rates of behavioral development themselves started flying at younger ages than drones derived from workers with slower rates of behavioral development. These results suggest that endocrine and genetic mechanisms associated with temporal polyethism did not evolve strictly within the context of worker social behavior.

The sexual division of labor : the impact of organizational change upon group cohesion and the creation of occupational identity

The purpose of this research is to identify the impact of recent organizational change upon the culture of firefighting. The experiences of female firefighters were utilized as a measure of cultural change. A purposive sample of twenty-seven male and female firefighters were interviewed in a semi-structured format about their experiences in the fire service. This research found that the culture of firefighting has adjusted to the presence of previously excluded groups by forging a division among the identities and roles of male and female firefighters. The white, male firefighters, who have traditionally constituted a majority of the workforce, have continued to identify with traditional firefighter roles and reported high levels of cohesion. In contrast, the female firefighters showed a greater variance in their identification with traditional roles and decreased levels of cohesion with the main body of the group.

First-ninth report [of the] Bureau of Labor Statistics. Industrial accidents in Illinois ... [July] 1907-December 31, 1915.

In 1917 the Board was succeeded by the Division of labor statistics of the Department of labor.

Jobs in the private sector : use of labor market information : a user's guide with detailed appendices /

"October 1980."

Seafaring guide & directory of labor-mangement affiliations.

Description based on: 1969.

Research series - Department of Labor and Industry, Division of Employment Security.

No more published?

Report on the improvement of the City of Dubuque, Iowa : to joint committee representing Dubuque Commercial Club, Civic Division of Dubuque Woman's Club, and Trades and Labor Congress /

Mode of access: Internet.

Report on the effectiveness of financing and selected eligibility, job search, and benefit payment operations of the unemployment insurance program : State of Montana, Department of Labor and Industry, Employment Security Division.

Mode of access: Internet.

Report [of a conference sponsored by] Institute of Labor and Industrial Relations [and] Division of University Extension, University of Illinois. May 20-21, 1965.

Mode of access: Internet.

Labor laws governing the Division of Workshop and Factory Inspection /

Mode of access: Internet.

To create a Division of Safety in the Department of Labor : hearings before the Committee on Education and Labor, United States Senate, Sixty-ninth Congress, first session on S. 3983, a bill to create in the Bureau of Labor Statistics of the Department of Labor a Division of Safety.

Hearings held May 21 and June 2, 1926.

QDROs, the Division of Pensions through Qualified Domestic Relations Orders.

Shipping list no.: 97-0328-P.

Annual report on the statistics of labor.

Vols. for 1869/70-1871/72 issued as documents of the Senate of the General Court of Massachusetts, no. 120, 150, 180; 1872/73 as document of the House of Representatives of the General Court of Massachusetts, no. 173; 1873/74-1878/79 as Massachusetts Public document no. 31; 1879/80- as Public document.