Episode Details

In this episode of the Beyond Jaws podcast, hosts Andrew Lewin and Dr. David Ebert welcome Dr. Grace Casselberry, the sixth recipient of the prestigious Eugenie Clark Award from the American Elasmobranch Society. Dr. Casselberry, a postdoctoral student at the University of Massachusetts at Amherst, shares her inspiring journey in marine biological research, highlighting her dedication, perseverance, and innovative contributions to the study of elasmobranchs, including sharks and rays. Listeners can look forward to insights into her accomplishments, future aspirations, and the impactful work she has done in public outreach and research. Join us for an engaging conversation about the importance of marine conservation and the legacy of Eugenie Clark!

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Dr. Grace Casselberry: A Rising Star in Shark Research

Dr. Grace Casselberry, the sixth recipient of the Eugenie Clark Award from the American Elasmobranch Society, has made significant strides in the field of shark research. As a postdoctoral researcher at the University of Massachusetts Amherst, her work focuses on the spatial ecology of various shark species, predator-prey dynamics, and the effects of catch-and-release angling on striped bass. Her journey into marine science and shark research is both inspiring and illustrative of her dedication to the field.

Early Influences and Education

Grace's interest in marine science was sparked during her childhood summers spent in Cape Cod, Massachusetts, where she developed a love for the ocean through fishing with her grandfather. Unlike many marine scientists who have been fascinated by sharks since childhood, Grace's path was more gradual. It wasn't until her undergraduate studies at the University of Connecticut, where she took a fish biology class, that she realized she could turn her passion for fishing into a career studying fish.

After completing her Bachelor's degree in Ecology and Evolutionary Biology, Grace interned at the Panama City Lab, where she gained hands-on experience with sharks. This internship solidified her interest in movement ecology and led her to pursue a Master's degree at the University of Massachusetts Amherst, where she studied the residency and habitat use of various shark species in a marine protected area.

Research Focus and Achievements

Grace's Master's research involved tagging and tracking tiger sharks, lemon sharks, nurse sharks, and Caribbean reef sharks in Buck Island Reef National Monument in St. Croix. Her findings revealed that these species spent over 50% of their tagged days within the marine protected area, underscoring its importance for shark conservation.

For her PhD, Grace shifted her focus to great hammerhead sharks in the Florida Keys, where she investigated their movement patterns and interactions with the recreational tarpon fishery. Her research uncovered that approximately 15% of hooked tarpon were consumed by hammerheads, raising concerns about the impact of shark predation on the tarpon population.

In addition to her shark research, Grace has also worked on critically endangered sawfish, conducting juvenile nursery area habitat assessments in Everglades National Park. This work involved catching and tagging juvenile sawfish to better understand their habitat use and population dynamics.

The Importance of Funding and Collaboration

Throughout her academic journey, Grace h