Just a freckly girl livin' in a fish world.

Research

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Chemoreception

Kelsi's PhD research is focused on the fluid dynamics of fish olfaction (how fish smell odor in the water). She is interested in the evolution and design of the diverse nasal morphologies (shape/structure) and the hydrodynamics (interaction with water) of the fish nose. Smell is an important sense in fishes and crucial for detecting predators, tracking prey, and finding mates. Research of this sensory system could lead to the design of a new, fish-inspired, underwater chemical sensor. Stay tuned for more updates as she researches this for the next few years,

Image by: Matthew Kolmann

Material properties of Fish Jaws

Elasmobranchs (sharks, skates, rays) don't have a skeleton of bone like ours. Instead, they have skeletons made of cartilage- like your nose or your ear! Freshwater stingrays, found in the amazon basin in Brazil (Potamotrygon leopoldi) are known for consuming hard-shelled snails. How do these stingrays crunch down on such a tough food source with a "soft" skeleton? Turns out- this specialized feeding mode of consuming tough prey, called "durophagy" has evolved a few different times in sharks, rays and ratfish, all with skeletons made of cartilage. They have special adaptations that help them eat, including large jaws and jaw muscles, big crushing tooth plates and even supportive internal struts inside their jaws for reinforcement. My research was focused on the evolution of such a remarkable adaptation and the mechanics behind this feeding mode. Click below for my publication or read my easy-to-understand blog post in the "Featured Fish Facts" section.

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Will fish use ARTIFICIAL habitat?

Oysters aren't just tasty, they provide important habitat for many estuarine fishes. Unfortunately, oyster populations have severely declined due to overharvest by humans, disease and poor fishery management. However, efforts have been made to restore oyster habitat and coastal management has been building human-made reefs. Oyster larvae, called "spat" will grow and colonize on any hard structure. Concrete blocks and "reef balls" have been used as a new home for oysters to grow. As an undergraduate student, I studied whether fish would utilize this somewhat artificial habitat as much as a natural oyster reef. I found that the same number and species of fishes used these "artificial" reefs when compared to natural reefs. This is promising for management that we can restore habitat to have the same benefits to the surrounding critter community. Click below to read the full publication.

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NEw species of Fish

How do you go about discovering a new species of fish? Well, it turns out that new species are often hiding in museum collections- just waiting to be described! I discovered this new species of guitarfish from the gulf of California using comparative morphometric methods and by describing the discrete measurable traits that make them different. I also created a dichotomous key of guitarfishes of the gulf of California to aid in their identification.