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SUMMARY:Beers with Biologists
DESCRIPTION:Join UWM’s Department of Biological Sciences for a fun and engaging learning experience at Black Husky Brewing\, 909 E. Locust St. Enjoy TED Talk-style science presentations from graduate students and researchers on topics including the curious cognitive world of spiders\, the ecology of kelp forests and the fascinating science taking place beneath Antarctica’s sea ice. \nWe’ll also be hosting a themed potluck: Bring your favorite arachnid- or ocean-inspired dish to share\, and come ready for an evening of great food\, great beer and fascinating science.
URL:https://uwm.edu/biology/event/beers-with-biologists/
LOCATION:Black Husky Brewing\, 909 E. Locust St.\, Milwaukee\, Wisconsin
CATEGORIES:Department
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DTSTART;TZID=America/Chicago:20260918T150000
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SUMMARY:Biological Sciences Colloquium: Dr. David A. Spade
DESCRIPTION:Dr. David A. Spade\, professor of Mathematical Sciences at UWM\, will be giving a talk about his work entitled “Characterization of Zooplankton Motion through Detection of Changepoints.” The abstract is as follows: \nOver the last several decades\, oceanographers have been particularly interested in the motion of zooplankton and other aquatic animals. Common techniques for modeling this motion involve assuming that the animal moves at random\, or that there is little relationship between the moves the animal makes at close time steps. However\, natural phenomena among zooplankton suggest that their movement is not totally at random. To investigate this\, it is necessary to know what the animal does\, rather than just knowing where it is. In this talk\, I examine the actions the animal takes along its trajectory and the importance of each. The animal takes an action at each time step\, but some are more important than others in determining the overall shape of the trajectory. I examine the trajectory to determine where the “kinks” in it lie. In other words\, where does the animal change direction significantly? I present a method of constructing a sequence of actions that the animal takes to get from one point to another and discuss the implications of this technique for future problems.\nThe presentation will begin at 3:00 PM in Lapham Hall N101\, preceded by an informal reception from 2:45-3:00 PM.
URL:https://uwm.edu/biology/event/biological-sciences-colloquium-dr-david-a-spade/
LOCATION:Lapham Hall\, N101\, 3209 N Maryland Ave\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Colloquia
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DTSTART;TZID=America/Chicago:20260925T150000
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SUMMARY:Biological Sciences Colloquium: Dr. Gabrielle Welsh
DESCRIPTION:Dr. Gabrielle Welsh\, postdoctoral researcher in behavioral ecology and genomics at the University of Chicago\, will be giving a talk about her work entitled “How parasitoids and relaxed preferences facilitate the evolution of novel signals in a rapidly evolving field cricket.”  The abstract is as follows: \nThe evolution of sexual signals is critical to the generation of biodiversity. How novel signals arise and spread is difficult to envision because new signal or receiver features may disrupt communication\, and we can rarely observe the incipient stages of signal evolution. Pacific field crickets\, Teleogryllus oceanicus\, provide an ideal opportunity to do so. Multiple novel signals that protect males from eavesdropping parasitoid flies have evolved in the past decade in Hawaii. I investigated 1) receiver behavior that facilitates mating by males producing novel signals\, 2) how this behavior changes as novel signals spread\, and 3) the genomic underpinnings of morphological variation that generates novel signals. To examine how novel signals persist despite not aligning with historical female preferences\, I tested the underappreciated hypothesis that relaxed receiver preferences facilitate the earliest stages of novel signal evolution. Using preference trials\, I found that females from Hawaii (where the flies are present) were more permissive than females from Australia and French Polynesia (where the flies are absent). Thus\, elevated mate searching costs may lead to relaxed preferences that accommodate novel signals. Relaxed preferences persisted in Hawaii even as novel signals spread. Preference relaxation likely allows new signals to spread. Genome-wide association studies show that novel song variants are associated with different genes. Thus\, novel signals with a convergent function (attracting mates while avoiding the fly) can have different genomic origins. \nThe presentation will begin at 3:00 PM in Lapham Hall N101\, preceded by an informal reception from 2:45-3:00 PM.
URL:https://uwm.edu/biology/event/biological-sciences-colloquium-dr-gabrielle-welsh/
LOCATION:Lapham Hall\, N101\, 3209 N Maryland Ave\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Colloquia
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