Notable Achievements

The weekend of February 28 – March 2 brought scientists from all over Texas to McLennan Community College and Baylor University in Waco, for the 145th Texas Academy of Sciences meeting. Ten students represented the Biology Department, including Gage Mallo ’26, Johun Reyes ’26, Annika Tracy ’25, Murphy Jacobie ’27, Madeleine Thomas ’26, Kylie Allemeier ’26, Katelin Pilarski ’26, Sarah Berver ’26, Alanna Guerrero ’25 and Jordan Emerson ’27. 

Based on her collaboration with Assistant Professor of Biology Kim McArthur, Annika gave a talk, titled “Location-independent axon pathfinding in the hindbrain of larval zebrafish,” that earned the first place undergraduate talk award for the neuroscience section. 

Madeleine presented a poster with her research mentor, Assistant Professor of Biology Sunny Scobell, titled “A morphological analysis of the dopaminergic pathway in the brain of a male pregnant pipefish.” Dr. Scobell also mentored Jennifer Smalz, a student from her previous institution (UD: The University of Dallas), who gave a talk titled “Investigating male pregnancy in Gulf Pipefish using scanning electron microscopy to describe the anatomy of the brood pouch over the reproductive cycle.” Ms. Smalz’ talk earned the first place undergraduate award in the systematics and evolutionary biology section. Within that section, Dr. Scobell also gave two presentations, one co-authored with UD student Farah Atarah, titled “Brood pouch anatomy throughout the course of male pregnancy in Gulf Pipefish,” and another focusing on her endocrinology, titled an “Investigation of the role of prolactin during reproduction in a fish with male pregnancy.”

Murphie presented a microbiology focused poster, titled “An affinity analysis of Aliivibrio fischeri and zooxanthellae” with the mentorship of Director of First Year Biology Laboratories Stacie Brown.

Working with Chair and Garey Professor of Biology Romi Burks, Gage presented a poster, titled “You better Belize they’re different: Phylogenetic analysis and species identification of native apple snails in Belize,” that garnered a first place best poster award in the systematics and evolutionary biology section. His poster co-author Johun secured first place in the Undergraduate Research Award Competition, complete with a $2,000 prize to continue the work, with his proposal, “Beneath Belizean waters: Discovering diversity of native apple snails in northern and southern Belize.” 

Also from the Burks lab, Kylie, Sarah, and Katelin shared their recent troubleshooting efforts in the lab in a poster titled “Extraordinary extraction efforts: Experiments to enhance DNA extraction for tissues of apple snails of conservation interests” that also used collections from Belize that occurred as part of the 2024 study abroad experience.

Dr. Burks also gave an oral presentation in the science education section about the recent undergraduate research experience that she developed in BIO50-222, Methods in Ecology and Evolution. Her talk, titled “Methodological microplastics: Development of an undergraduate CURE to quantify abundance of microplastic fibers in a local stream,” came out of conversations with microplastics expert Andre Felton from the University of Texas at San Antonio.

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Expertise

Neuroscience, Developmental Biology, Microscopy

Dr. Kim McArthur is a developmental neurobiologist. As an undergraduate, she attended another awesome liberal arts college (Gustavus Adolphus College in St. Peter, MN), majoring in biology and religion. She earned her Ph.D. in neuroscience from Washington University in St. Louis, then completed post-doctoral work at Cornell University before joining Southwestern as an assistant professor in 2019.

  • Dr. Kim McArthur is a developmental neurobiologist. As an undergraduate, she attended another awesome liberal arts college (Gustavus Adolphus College in St. Peter, MN), majoring in biology and religion. She earned her Ph.D. in neuroscience from Washington University in St. Louis, then completed post-doctoral work at Cornell University before joining Southwestern as an assistant professor in 2019.

  • Students in the McArthur lab investigate the fundamentals of neural circuit development.

    What strategies do neurons use to choose their synaptic partners? How do these partnerships change over time, vary across individuals, and respond to disruptions? What are the consequences for neural circuit function and behavior?

    To answer these questions, we directly and non-invasively explore circuit development as it unfolds in the hindbrain of larval zebrafish, using a powerful combination of approaches — including electrophysiology, neuronal tracing, calcium imaging, and behavior.

  • McArthur KL. (2024) Cranial motor neuron input specificity refined by activity. Trends Neurosci 48(1): 5-6. PMID: 39609183

    McArthur KL, Ho W. (2024) Structure and topography of facial branchiomotor neuron dendrites in larval zebrafish (Danio rerio). J Comp Neurol 532(11): 325682. PMID: 39497493.

    McArthur KL, Tovar VM*, Griffin-Baldwin E*, Tovar BD*, Astad EK*. (2023) Early development of respiratory motor circuits in larval zebrafish (Danio rerio). J Comp Neurol. PMID: 36881713

    * indicates an SU student author

    McArthur KL, Fetcho JR. (2017) Key features of structural and functional organization of zebrafish facial motor neurons are resilient to disruption of neuronal migration. Curr Biol 27: 1746-1756.  PMID: 28602649

    • This research was covered in an interview for The Node.

    Chen S, Chiu CN, McArthur KL, Fetcho JR, Prober DA. (2016) TRP channel mediated neuronal activation and ablation in freely behaving zebrafish. Nat Methods 13: 147-150.  PMID: 26657556

    McArthur KL, Dickman JD. (2011) Behavioral state modulates the activity of brainstem sensorimotor neurons. J Neurosci 31: 16700-16708.  PMID: 22090497

    McArthur KL, Zakir M, Haque A, Dickman JD. (2011) Spatial and temporal characteristics of vestibular convergence. Neuroscience 192: 361-371.  PMID: 21756981

    McArthur KL, Dickman JD. (2011) State-dependent sensorimotor processing: gaze and posture stability during simulated flight in birds. J Neurophysiol 105: 1689-1700.  PMID: 21307332

    McArthur KL, Dickman JD. (2008) Canal and otolith contributions to compensatory tilt responses in pigeons. J Neurophysiol 100: 1488-1497.  PMID: 18632885