Presenter Information

Taylor BoppFollow

Location

Schewel 232

Access Type

Campus Access Only

Presentation Type

Oral Presentation

Start Date

4-4-2018 1:45 PM

Department

Biomedical Science

Abstract

Bones in many higher teleosts, such as percids and centrarchids, lack osteocytes that function as chemo- and mechano-sensors, and thus, are not actively involved in homeostasis of blood calcium level. Nonetheless, the vertebrae of yellow perch, Perca flavescens, living in darker and low calcium water, have demonstrated adaptive modeling and remodeling to be more mineralized and thus enhance transmission of the axial muscle torque into the thrust force for the C-start predator escape behavior. The prey-predator interaction is expected to occur much closer between prey fish and predator fish in darker water; therefore, darker water imposes greater selection pressure on maximizing the escape performance. Therefore, the vertebrae become more mineralized regardless of calcium bioavailability in the water. However, it is not well-known what serves as the calcium reservoir for calcium homoeostasis and bone modeling and remodeling in teleosts. In this study, we used an Agilent 4200 MP-AES (Microwave induced plasma atomic emission spectrometer) and determined the concentration of mineralized calcium in several mineralized tissues (vertebrae, scales, and skin) of P. flavescens living in darker and low calcium water, as well as P. flavescens residing in water with high visibility and high calcium bioavailability. We discuss the implication of our results regarding how teleosts mobilize calcium.

Faculty Mentor

Priscilla Gannicott, Ph.D. & Takashi Maie, Ph.D.

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Apr 4th, 1:45 PM

Mobilization of Calcium Across Mineralized Tissues in Yellow Perch, Perca Flavescens

Schewel 232

Bones in many higher teleosts, such as percids and centrarchids, lack osteocytes that function as chemo- and mechano-sensors, and thus, are not actively involved in homeostasis of blood calcium level. Nonetheless, the vertebrae of yellow perch, Perca flavescens, living in darker and low calcium water, have demonstrated adaptive modeling and remodeling to be more mineralized and thus enhance transmission of the axial muscle torque into the thrust force for the C-start predator escape behavior. The prey-predator interaction is expected to occur much closer between prey fish and predator fish in darker water; therefore, darker water imposes greater selection pressure on maximizing the escape performance. Therefore, the vertebrae become more mineralized regardless of calcium bioavailability in the water. However, it is not well-known what serves as the calcium reservoir for calcium homoeostasis and bone modeling and remodeling in teleosts. In this study, we used an Agilent 4200 MP-AES (Microwave induced plasma atomic emission spectrometer) and determined the concentration of mineralized calcium in several mineralized tissues (vertebrae, scales, and skin) of P. flavescens living in darker and low calcium water, as well as P. flavescens residing in water with high visibility and high calcium bioavailability. We discuss the implication of our results regarding how teleosts mobilize calcium.