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DTSTART;TZID=America/Los_Angeles:20220404T120000
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DTSTAMP:20260504T025611
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SUMMARY:Kelsey McCune - Space Use\, Exploratory Behavior and Rapid Range Expansion in Great-Tailed Grackles
DESCRIPTION:Humans are rapidly changing the natural world\, leading to decreasing native fauna and increasing non-native fauna.  Problematic species range expansions are occurring across the globe\, but not all species are able to become established outside of their original range.  It is still unclear which characteristics facilitate successful invasions or native species persistence in human-modified environments.  One hypothesis is that variation in behavior may be important when certain individuals possess traits that make them more likely to succeed when venturing into new habitats and outcompeting heterospecifics.  For example\, variation in the ability (movement) and motivation (exploratory tendency) to encounter conspecifics and novel food sources could facilitate range expansions.  However\, no previous research has compared measures of exploration to the natural movement behavior of individuals along the range of a currently invading species.  In this talk I will discuss my research on movement and exploratory behaviors in a species that has rapidly expanded its range in the U.S.\, the great-tailed grackle. I consider whether individuals consistently differ in their movement behavior such that it can be considered an inherent individual trait\, whether movement relates to performance on an exploration task\, and whether movement and exploration differ between grackles in the center of the range and those on the invasion front.  Invasive species are implicated as a leading cause of biodiversity loss\, so this research will facilitate a better understanding of the importance of these behavioral characteristics in predicting potential invasions in other systems. \n 
URL:https://bec.ucla.edu/event/kelsey-mccune-space-use-exploratory-behavior-and-rapid-range-expansion-in-great-tailed-grackles/
CATEGORIES:2022,Presentation,Upcoming Presentation
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DTSTART;TZID=America/Los_Angeles:20220411T120000
DTEND;TZID=America/Los_Angeles:20220411T133000
DTSTAMP:20260504T025611
CREATED:20220323T153443Z
LAST-MODIFIED:20220414T202620Z
UID:6477-1649678400-1649683800@bec.ucla.edu
SUMMARY:James Higham - Insights into Life-History from the Cayo Santiago Rhesus Macaques
DESCRIPTION:We humans come from a diverse order\, the primates\, which make excellent model systems for studying the interface between the biological and the social. In this talk\, I focus on our long-running field studies of the rhesus macaques of Cayo Santiago\, Puerto Rico. Decades of individual-based demographic data allow us to explore variation in life history\, including the impacts of interbirth intervals and infant birth weights on infant survival\, and both the development and senescence of reproduction in the same individuals across the lifespan. Our studies leverage behavioral observations\, cognitive experiments\, physiological measures\, genomic and transcriptomic data from blood and tissues\, measurements of soft-tissues and skeletons\, microbiome samples\, and more. I show how long-term integrative study allows us to explore the interactions between the biological and the social from two perspectives: bottom-up and top-down. From the bottom-up perspective\, we are beginning to ask how variation in the genome and epigenome\, via the transcriptome\, constructs cellular\, tissue- and organ-level biology in individuals\, and in turn\, how individual-level behaviors structure societies and populations. From the top-down perspective\, we study how variation in the social environment can get under the skin and impact health and disease. I finish by discussing the Anthropocene\, and by demonstrating the top-down effects of climate change-linked natural disasters on rhesus macaque societies\, and on individual health via effects on the transcriptome. Combining approaches from behavioral ecology\, physiology\, quantitative genetics\, genomics and transcriptomics\, computer vision\, and comparative psychology\, this talk is part demonstration of the value of integrative research\, and part love-letter to long-term field studies. \n 
URL:https://bec.ucla.edu/event/james-higham-insights-into-life-history-from-the-cayo-santiago-rhesus-macaques/
CATEGORIES:2022,Presentation,Upcoming Presentation
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20220425T120000
DTEND;TZID=America/Los_Angeles:20220425T233000
DTSTAMP:20260504T025611
CREATED:20220323T154100Z
LAST-MODIFIED:20220420T204926Z
UID:6484-1650888000-1650929400@bec.ucla.edu
SUMMARY:Luke Premo - How Cultural Evolutionary Forces Affect Regional Variation in Structured Populations and the Archaeological Assemblages They Leave Behind
DESCRIPTION:Paleolithic archaeologists have employed expectations generated from models developed in evolutionary anthropology to aid in the investigation of the origins of high-fidelity cultural transmission. Based on the notion that copying error ought to yield high levels of between-group cultural variation under unbiased cultural transmission\, archaeologists have interpreted ostensibly “lower-than-expected” levels of cultural variation among regional archaeological assemblages as evidence of widespread conformist biased transmission. But a closer inspection of cultural evolutionary theory suggests the expectation that unbiased transmission yields high between-group differentiation holds only for a narrow\, idealized set of conditions that are likely to be violated in empirical cases. Additionally\, it is unclear how or if this expectation translates to time-averaged assemblages of artifacts even under special conditions. I’ve developed a relatively simple agent-based model of cultural transmission in a structured population to improve our understanding of how cultural evolutionary forces affect between-group variation in a selectively neutral discrete trait under a wide range of conditions. My experimental design addresses how intergroup transmission and copying error affect regional cultural variation under four different mechanisms of cultural transmission (unbiased\, vertical\, conformist\, or prestige biased) and two different models of copying error (finite or infinite variants). I quantify cultural differentiation not only between groups in a structured population but also between time-averaged assemblages of culture material. The results highlight three points: 1) there are many conditions—not just widespread conformity—in which one should expect relatively low variation among semi-\, or even completely\, isolated groups (and the archaeological assemblages they create through time) despite the effects of copying error\, 2) the way in which intergroup transmission and copying error affect between-group (and between-assemblage) variation varies among cultural transmission mechanisms\, and 3) time-averaging affects between-assemblage variation differently under different cultural transmission mechanisms. Considering these findings\, I propose a list of questions one should answer before attempting to infer mechanisms of cultural transmission from time-averaged archaeological assemblages. Answers to these questions will help researchers better match expectations of regional cultural variation with the empirical case at hand. \n  \nhttps://anthro.wsu.edu/faculty-and-staff/luke-premo/
URL:https://bec.ucla.edu/event/luke-premo-how-cultural-evolutionary-forces-affect-regional-variation-in-structured-populations-and-the-archaeological-assemblages-they-leave-behind/
CATEGORIES:2022,Presentation,Upcoming Presentation
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