Mechanosensory interactions drive collective behaviour in Drosophila.

Collective behaviour enhances environmental sensing and decision-making in groups of animals. Experimental and theoretical investigations of schooling fish, flocking birds and human crowds have demonstrated that simple interactions between individuals can explain emergent group dynamics. These findings indicate the existence of neural circuits that support distributed behaviours, but the molecular and cellular identities of relevant sensory pathways are unknown. Here we show that Drosophila melanogaster exhibits collective responses to an aversive odour: individual flies weakly avoid the stimulus, but groups show enhanced escape reactions. Using high-resolution behavioural tracking, computational simulations, genetic perturbations, neural silencing and optogenetic activation we demonstrate that this collective odour avoidance arises from cascades of appendage touch interactions between pairs of flies. Inter-fly touch sensing and collective behaviour require the activity of distal leg mechanosensory sensilla neurons and the mechanosensory channel NOMPC. Remarkably, through these inter-fly encounters, wild-type flies can elicit avoidance behaviour in mutant animals that cannot sense the odour--a basic form of communication. Our data highlight the unexpected importance of social context in the sensory responses of a solitary species and open the door to a neural-circuit-level understanding of collective behaviour in animal groups.

Report of Recommendations to the Board of Regents for the year ended June 30, 2012

Report on the Board of Regents for the year ended June 30, 2012

Evaluation of In-Use Fuel Economy and On-Board Emissions for Hybrid and Regular CyRide Transit Buses, October 2012

The objective of this project was to evaluate the in-use fuel economy and emission differences between hybrid-electric and conventional transit buses for the Ames, Iowa transit authority, CyRide. These CyRide buses were deployed in the fall of 2010. Fuel economy was compared for the hybrid and control buses. Several older bus types were also available and were included in the analysis. Hybrid buses had the highest fuel economy for all time periods for all bus types. Hybrid buses had a fuel economy that was 11.8 percent higher than control buses overall, 12.2 percent higher than buses with model years 2007 and newer, 23.4 percent higher than model years 2004 through 2006, 10.2 percent higher than model years 1998 through 2003, 38.1 percent higher than model years 1994 through 1997, 36.8 percent higher than model years 1991 through 1993, and 36.8 percent higher for model years pre-1991. On-road emissions were also compared for three of the hybrid buses and two control buses using a portable emissions monitor. On-average, carbon dioxide, carbon monoxide, and hybrid carbon emissions were much higher for the control buses than for the hybrid buses. However, on average nitrogen oxide emissions were higher for the hybrid buses.

Report of Recommendations to the Iowa Board of Parole for the year ended June 30, 2012

Audit report of the Iowa Board of Parole for the year ended June 30, 2012

Iowa Utilities Board Performance Plan, FY 2014

Agency Performance Plan for Fiscal Year 2014.

Audit report on the AIM - Jefferson, Keokuk Early Childhood Iowa Area Board, d/b/a Jefferson/Keokuk Early Childhood Iowa Area for the year ended June 30, 2012

Audit report on the AIM - Jefferson, Keokuk Early Childhood Iowa Area Board, d/b/a Jefferson/Keokuk Early Childhood Iowa Area for the year ended June 30, 2012

Report of recommendations to the Public Employment Relations Board for the year ending, June 30, 2012

Audit report of the Public Employment Relations Board for the year ended June 30, 2012

Report on recommendations to the Iowa Ethics and Campaign Disclosure Board for the year ended June 30, 2012

Audit report of the Iowa Ethics and Campaign Disclosure Board for the year ended June 30, 2012

2012 Annual Report of the Iowa Utilities Board

The IUB Annual Report contains summaries for IUB dockets that were active during the calendar year as well as IUB background information, IUB work section highlights, descriptions of IUB court cases and participation in federal proceedings, listings of IUB assessments to jurisdictional utilities, and the IUB fiscal year budget.

Report of recommendations to the Public Employment Relations Board for the year ending June 30, 2005

Report of recommendations to the Public Employment Relations Board for the year ending June 30, 2005

Iowa Board of Nursing Annual Report, July 1, 2012-June 30, 2013

The annual report of the Iowa Board of Nursing includes information on legislation, administrative rules, nursing education, nursing practice, continuing education, licensing, enforcement, administration, financial report, statistics and general nursing demographics.

Iowa Board of Nursing Annual Report, July 1, 2012-June 30, 2013

The annual report of the Iowa Board of Nursing includes information on legislation, administrative rules, nursing education, nursing practice, continuing education, licensing, enforcement, administration, financial report, statistics and general nursing demographics.

Report on recommendations to the Iowa Ethics and Campaign Disclosure Board for the year ended June 30, 2005

Report on recommendations to the Iowa Ethics and Campaign Disclosure Board for the year ended June 30

Report on recommendations to the Iowa Ethics and Campaign Disclosure Board for the year ended June 30, 2009

Report on recommendations to the Iowa Ethics and Campaign Disclosure Board for the year ended June 30, 2009