A Hawk-Dove game in kleptoparasitic populations

Kleptoparasitism, the parasitism by theft, is a widespread biological phenomenon. In this paper we extend earlier models to investigate a population of conspecifics involved in foraging and, potentially, kleptoparasitism. We assume that the population is composed of two types of individuals, Hawks and Doves. The types differ according to their strategic choices when faced with an opportunity to steal and to resist a challenge. Hawks use every opportunity to steal and they resist all challenges. Doves never resist and never steal. The fitness of each type of individual depends upon various natural parameters, for example food density, the handling time of a food item, density of the population, as well as the duration of potential fights over the food. We find the Evolutionarily Stable States (ESSs) for all arameter combinations and show that there are three possible ESSs, pure Hawks, pure Doves, and a mixed population of Hawks and Doves. We show that for any set of parameter values there is exactly one ESS. We further investigate the relationship between our findings and the classical Hawk-Dove game as defined in Maynard Smith 1982. We also show how our model extends the classical on

Interface, Spring 2012

Behind the unflagging spirit of SIS there are three themes that resonate throughout this issue of Interface. First, the School continues to be client-centric and is working hard to reach out to all of its constituencies—the students, the alumni and to its many friends and partners. Second, we have become more focused setting priorities and aligning our resources to achieve our goals and outperform as never before in research, teaching and service. And third, how we look is part of who we are—professional, innovative, and successful. You will discover these themes as you read about personnel changes that have occurred since last fall, our renovation projects, faculty awards and achievements, staff news, student activities and projects, alumni affairs and the School’s governance and administration

Interface, Fall 2009

Interpreting climate change data and predicting what it could mean to life on earth and the environment that sustains it is an example of a major 21st Century challenge that a wide range of disciplines are working to address. Interdisciplinary efforts to tackle such concerns have been limited by a lack of collaborative tools for communicating and sharing information. The project DataONE (ONE being short for Observation Network for Earth) seeks to alleviate this difficulty by creating a mechanism and cyberinfrastructure through which communities of researchers worldwide can share data

Interface, Spring 2005

The University of Wisconsin (UW) caught the attention of Tennessee Volunteers this spring. Tennessee signed UW–Milwaukee coach Bruce Pearl as the new men’s basketball coach. From another UW campus (Madison) comes the next director of the School of Information Sciences, Professor Ed Cortez from the School of Library and Information Studies

Interface, June 2002

Academic 2001-2002 has just ended, so it seems a good time to recap some of the events of this year for our alumni. Importantly, our accreditation program presentation and visit went well, and we are grateful for all the support from you. Nearly 100 people joined the faculty and staff for the reception and briefing on April 7, and the external review panel seemed pleased to be able to visit with so many constituents of our program. You can still review the program presentation on the Web at http://www.sis.utk.edu/ admin/coa/index.htm, and there is a wealth of information about the School in the linked documents. We won\u27t hear from the ALA Committee on Accreditation until late June or early July but we will get the word out on the outcome of the accreditation review in the next issue of Interface

Interface, March 2002

Greetings and welcome to the revised and renewed Interface. Please share your copy with others in the information and library science community, for many items will be of interest beyond our own School\u27s alumni. In this quarter\u27s column, I am inviting you to participate in two exciting events in the life of our School: SIS Accreditation Activities and the 30th Anniversary Celebration & $30,000 for 30 Years Campaign

Interface, Spring 2004

The last few months have been busy ones for SIS. Since the first of the year, we’ve experienced an Academic Program Review, searched for a new faculty member, participated in a search for a permanent Dean of the College of Communication and Information, and, through the generous assistance of the Institute for Scientific Information’s (ISI) Corporate Awards Program, we cosponsored a lecture by Dr. Michael Buckland. We should have a new College dean in place when you read the next Interface. Four excellent candidates came to campus for two-day interviews that involved faculty, staff and students from every unit in the College. This effort represents yet another step toward the full integration of SIS into the College, as well as a step forward in the creation of a new identity for the College

Interface, Spring 2008

Last fall, SIS faculty engaged regional information leaders in an ongoing effort to remain relevant, forward looking, and nimble in a complex and dynamically changing information landscape. We thought that we would give our readers a snapshot of some ongoing efforts the School makes to stay current and engaged with our library and information science colleagues