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X-WR-CALDESC:Events for Center for Behavior, Evolution, and Culture
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DTSTART;TZID=America/Los_Angeles:20170502T000000
DTEND;TZID=America/Los_Angeles:20170502T000000
DTSTAMP:20260510T065652
CREATED:20200922T220900Z
LAST-MODIFIED:20201013T005121Z
UID:4393-1493683200-1493683200@bec.ucla.edu
SUMMARY:Kevin Langergraber - Group Augmentation\, Collective Action\, and Territorial Boundary Patrolling by Male Chimpanzees
DESCRIPTION:Kevin Langergraber: Arizona State UniversityMany animals carry out activities together because the benefits derived from collective action exceed those that can be achieved individually. But how can collective action evolve when individuals benefit from cooperation regardless of whether they pay its participation costs? According to one influential perspective\, collective action problems are common\, especially when groups are large\, but may be solved when individuals who have more to gain from the collective good or can produce it at low costs provide it to others as a byproduct. Several results from a 20-year study of one of the most striking examples of collective action in non-human animals\, territorial boundary patrolling by male chimpanzees\, are consistent with these ideas: individual participation varied positively with both paternity success\, i.e.\, the benefits\, and dominance rank\, i.e.\, a proxy for costs\, and negatively with group size. Collective action theory nevertheless could not explain all our results because individual patrolling effort was higher and less variable than participation in intergroup aggression in other primate species\, and males often patrolled when they had no offspring or maternal relatives in the group to protect. In addition\, the aggregate patrolling effort of the group did not decrease with group size. These results are better explained by group augmentation theory\, which proposes that individuals should bear the short-term costs of collective action even when they have little to gain immediately\, if such action leads to increases in group size and ultimately long-term reproductive success.
URL:https://bec.ucla.edu/event/kevin-langergraber-group-augmentation-collective-action-and-territorial-boundary-patrolling-by-male-chimpanzees/
CATEGORIES:2017,Past Presentation,Presentation
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170508T000000
DTEND;TZID=America/Los_Angeles:20170508T000000
DTSTAMP:20260510T065652
CREATED:20200922T220735Z
LAST-MODIFIED:20201013T005120Z
UID:4359-1494201600-1494201600@bec.ucla.edu
SUMMARY:Claudia Valeggia - Life history (and other) transitions among the Qom of Argentina
DESCRIPTION:Claudia Valeggia: UC DavisThis talk will be about change and how we experience it. Humans go through several transitions during the course of their life. The transition from one life history phase to the next\, e.g. from infancy to childhood or from reproductive to post-reproductive life\, represents a physiological challenge as well as a sociocultural one. We have been evaluating the interaction among biocultural variables underlying key life history transitions and identifying the implicated trade-offs. With a different analytical focus\, we are also interested in exploring transitions at a population level\, like the ones indigenous communities are experiencing all over the world. For the last 20 years\, we have been working with Qom and other indigenous communities in northern Argentina. Biological and ethnographic data are combined to understand the theoretical and applied components of these life and population transitions. I will present an overview of what we have learned so far and share some of the contributions we have made to evolutionary anthropology\, human biology\, biocultural studies\, and global public health.
URL:https://bec.ucla.edu/event/claudia-valeggia-life-history-and-other-transitions-among-the-qom-of-argentina/
CATEGORIES:2017,Past Presentation,Presentation
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170515T000000
DTEND;TZID=America/Los_Angeles:20170515T000000
DTSTAMP:20260510T065652
CREATED:20200922T220735Z
LAST-MODIFIED:20201013T005120Z
UID:4360-1494806400-1494806400@bec.ucla.edu
SUMMARY:Anita Stone - From Juveniles to Adults: Life History Challenges and Strategies of Squirrel Monkeys
DESCRIPTION:Anita Stone: California Lutheran UniversityThe primate juvenile period has been considered a “limbo phase” with few evolutionary consequences\, a view that has been challenged. In addition\, it has been proposed that juvenility is a high-risk stage in which juveniles are at social and ecological disadvantages compared to adults in their group. Using field data from a population of squirrel monkeys (Saimiri collinsi) in Eastern Amazonia\, Brazil\, I evaluate the “riskiness” of the juvenile phase. These neotropical primates are small\, show delayed maturation\, are frugivorous-insectivorous and live in large social groups. Contrary to expectations\, juveniles are at no disadvantage compared to larger and older adults\, both in terms of time needed to acquire foraging skills or in competitive interactions with older conspecifics. I argue that in this genus of neotropical primate\, adults face higher sociecological risks associated with reproductive challenges than do juveniles. I will then discuss the distinct life history pressures that affect adult male and adult female squirrel monkeys.
URL:https://bec.ucla.edu/event/anita-stone-from-juveniles-to-adults-life-history-challenges-and-strategies-of-squirrel-monkeys/
CATEGORIES:2017,Past Presentation,Presentation
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20170522T000000
DTEND;TZID=America/Los_Angeles:20170522T000000
DTSTAMP:20260510T065652
CREATED:20200922T220736Z
LAST-MODIFIED:20201013T005120Z
UID:4361-1495411200-1495411200@bec.ucla.edu
SUMMARY:Adrian Bell - Advancing Our Evolutionary Understanding of Migration
DESCRIPTION:Adrian Bell: University of UtahMost evolutionary ecological outcomes are highly sensitive to the nature of migration. The when\, where\, and how of migration are fundamental to evolutionary questions that anthropologists and others have tackled\, though with varying levels of analytical rigor. In worst cases\, migration is merely acknowledged as the elephant in the room. How can we do better! In this talk I discuss theoretical and empirical approaches that help us more rigorously explore the patterns of migration and measure its impact in prehistory and the present. I take examples from my theoretical work on the Ideal Despotic Distribution\, ethnic markers\, and the evolution of essentialism. I also discuss my empirical work on settlement patterns in the Pacific\, and ongoing ethnographic work in Tonga and the Tongan diaspora. Throughout I advocate the balanced use of mathematical theory and empirical rigor as the way forward.
URL:https://bec.ucla.edu/event/adrian-bell-advancing-our-evolutionary-understanding-of-migration/
CATEGORIES:2017,Past Presentation,Presentation
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